JP7097038B1 - Laminated steel sheet manufacturing equipment and laminated steel sheet manufacturing method - Google Patents

Abstract

An object of the present invention is to provide a laminated steel plate manufacturing apparatus and a laminated steel plate manufacturing method for manufacturing laminated steel plates with little deviation in the thickness direction without limiting the shape of the laminated steel plates. A laminated steel plate manufacturing apparatus (100) or the like includes a mold consisting of an upper mold (2) and a lower mold (3) which are paired to punch a steel plate from a steel plate material. The upper mold 2 and the lower mold 3 are relatively movable along the vertical direction. The mold includes an outline mold 11 composed of an outline upper mold 20 and an outline lower mold 30 for punching out the outline of a steel plate. The outer shape upper mold 20 is rotatable around a first central axis C1 extending vertically with respect to the upper mold 2, and the outer shape lower mold 30 is rotatable with respect to the lower mold 3 along the first central axis C1. is rotatable around the When forming a steel plate, the outer shape upper mold 20 and the outer shape lower mold 30 are each rotated by a predetermined angle to punch the steel plate material in a state in which the relative positions are aligned with each other, and the steel plates are laminated to form a laminated steel plate. It is possible to [Selection drawing] Fig. 2

Description

The present invention relates to a manufacturing apparatus and a manufacturing method for laminated steel sheets used for motors and the like.

Conventionally, there have been various proposals for an apparatus for manufacturing a laminated steel plate constituting an armature of a rotary electric machine. For example, as an apparatus for manufacturing a laminated steel sheet, there has been a proposal for processing from the forming of a single steel sheet to the completion of a laminated steel sheet in a multi-stage progressive die. A guide post is provided on the lower die of the multi-stage progressive die consisting of the upper die and the lower die, and the stripper attached so that it can move up and down along the guide post, and various punches hang down from the lower surface of the upper die through the stripper. Assembled with, and place the die on the lower die corresponding to various punches. The thin plate material is punched out with various punches, and the outer shape of the single steel plate is punched from the thin plate material with the final punch, and the previously punched single steel plate and caulking are sequentially performed to manufacture a laminated steel plate.

In the case of the manufacturing equipment described above, the plate thickness is not uniform due to the bending of the rolling roll that occurs during the production of the thin plate material as the material. There was a problem that the thickness was deviated.

To solve this problem, for example, according to the description of Patent Document 1, the laminated steel sheet manufacturing apparatus is composed of an upper die formed so as to be vertically movable by a press crankshaft and a lower die formed corresponding to the upper die. It had the following configuration, which is a mold. It consists of multiple punches assembled from the lower surface of the upper mold in a hanging state and multiple dies arranged in the lower mold corresponding to multiple punches. The steel plate punched out earlier and caulking are performed in sequence. The die is a cylindrical die, and the die is equipped with an indexing device that rotates an angle of one slot or several slots with respect to the point symmetry axis of a single steel plate. The indexing device is actuated in response to the rotation of the press crankshaft that actuates the upper die, rotating the die while the punch is away from the die. The manufacturing apparatus described in Patent Document 1 is a so-called transshipment apparatus.

According to this, since the single steel plate is laminated by rotating the angle of one slot or several slots with respect to the point symmetry axis of the single steel plate, the laminated steel plate has a thickness deviation as compared with the case where the rolling is not performed. Can be reduced.

Japanese Unexamined Patent Publication No. 3-174927

However, in the conventional example, the die in the lower mold is rotated to perform rolling, and the punch in the upper mold is fixed. Therefore, it is a condition that the single steel plate and the laminated steel plate to be manufactured have a point-symmetrical shape, and there is a problem that a non-point-symmetrical shape cannot be dealt with. The laminated steel sheet constituting the iron core of the armature has various shapes, and there is a problem that the applicable range is narrowed if the shape is point-symmetrical.

An object of the present invention is to provide a laminated steel sheet manufacturing apparatus for manufacturing a laminated steel sheet having a small deviation in the thickness direction without limiting the shape of the laminated steel sheet, and a method for manufacturing the laminated steel sheet.

The laminated steel plate manufacturing apparatus according to the first aspect of the present invention is a manufacturing apparatus for manufacturing a laminated steel plate (14) by laminating a steel plate (17) punched into a predetermined shape from a steel plate material from the steel plate material. In order to punch out the steel plate, a mold (10) composed of a pair of upper dies (2) and lower dies (3) is provided, and the upper dies and the lower dies are relative to each other along the vertical direction. The die includes an outer die (11) including an outer die (20) and an outer die (30) for punching the outer shape of the steel plate. Is rotatable around a first central axis (C1) extending vertically with respect to the upper mold, and the outer shape lower mold is around the first central axis with respect to the lower mold. It is rotatable, and when the steel plate is punched and formed, each time the steel plate is punched out, or every time a predetermined number of the steel plates are punched out, the outer die and the outer die are placed at a predetermined angle (respectively). The steel plate is punched from the steel plate material and laminated to form the laminated steel plate by rotating θ) so that the positions are aligned with each other.

According to this, when forming a steel sheet, the laminated steel sheet manufacturing apparatus punches out the steel sheet material in a state where the outer die and the outer die are rotated by a predetermined angle and their relative positions are aligned with each other. , Steel plates can be laminated. Therefore, since the steel sheet can be rotated by a predetermined angle and then laminated to produce a laminated steel sheet without limitation of the outer shape, the deviation in the thickness direction after the steel sheets are laminated can be reduced.

Further, in the laminated steel plate manufacturing apparatus, the member constituting the outer die forms a substantially cylindrical outer die outer surface (29) having at least a part of the outer periphery centered on the first central axis. In the upper mold, a portion accommodating the outer mold forms a cylindrical upper mold opening (127), and the outer peripheral surface of the outer mold is between the upper mold opening. The portion where the outer mold and the upper mold face each other includes a bearing member (28), and the outer mold slides with respect to the upper mold via the bearing member. The member that is rotatable and constitutes the outer outer die has a substantially cylindrical outer outer die outer peripheral surface (38) having at least a part of the outer periphery thereof centered on the first central axis, and the lower outer die is formed. In the mold, a portion accommodating the outer shape lower mold forms a cylindrical lower mold opening (136), and includes the space between the outer peripheral surface of the outer shape lower mold and the lower mold opening. The portion where the outer shape lower mold and the lower mold face each other is provided with the bearing member (28), and the outer shape lower mold can slide and rotate with respect to the lower mold via the bearing member. good.

In this case, the laminated steel sheet manufacturing apparatus includes a bearing member at a portion where the outer die and the upper die face each other, including between the outer peripheral surface of the outer die and the opening of the upper die. A portion where the outer mold and the lower mold face each other, including between the outer peripheral surface of the outer mold and the opening of the lower mold, includes a bearing member. Therefore, the outer shape upper mold can stably slide and rotate with respect to the upper mold, and the outer shape lower mold can stably slide and rotate with respect to the lower mold without rotational deviation.

Further, the laminated steel plate manufacturing apparatus includes a rotation drive device (5) for rotationally driving the outer shape upper mold and the outer outer shape lower mold, and the rotary drive device is an upper mold for rotating the outer shape upper mold. A drive device (15), a lower mold drive device (19) for rotating the outer shape lower mold, and a rotary drive source (51) for rotationally driving the upper mold drive device and the lower mold drive device. The rotation drive control device (54) for controlling the drive of the rotation drive source is provided, and the rotation drive control device uses the rotation drive source in a state where the upper mold and the lower mold are separated in the vertical direction. The rotary drive source is driven so as to rotate the outer shape upper mold and the outer shape lower mold by the predetermined angle each time one punching of the steel plate or each time a predetermined number of the steel plates are punched. May be rotated and controlled.

In this case, the laminated steel sheet manufacturing apparatus can rotate the outer die and the outer die with one rotary drive source. Therefore, the rotary drive device can be miniaturized and the cost of the device can be reduced. Further, since the rotation drive control device controls to rotate the steel sheet by a predetermined angle for each number of punched steel sheets, it is possible to accurately perform the step of reducing the deviation in the thickness direction after laminating the steel sheets.

Further, in the laminated steel plate manufacturing apparatus, the rotation drive device supports a rotation drive shaft (55) for transmitting the rotation of the rotation drive source to the outer shape upper mold and the outer shape lower mold, and the rotation drive shaft. A drive shaft elastic member (156) that applies an elastic force downward in the vertical direction to the rotary drive shaft from either the drive shaft support base (53) and the drive shaft support base or the upper mold. , 256), the rotary drive shaft is on the upper side in the vertical direction and engages with the upper mold drive device, and the lower mold is on the lower side in the vertical direction. The upper mold drive shaft (58) is composed of a lower mold drive shaft (58) that engages with the drive device, the upper mold drive shaft and the lower mold drive shaft are engaged with each other in the rotation direction, and the upper mold drive device is the upper mold. The upper mold moves in the same direction as the upper mold moves along the vertical direction, and the upper mold drive device and the upper mold drive shaft are relatively relative to each other in the direction along the vertical direction. In a state where the upper mold and the lower mold are separated from each other in the vertical direction, the drive shaft elastic member has the upper mold drive shaft and the upper mold drive device in the direction along the vertical direction. When the rotation drive source is driven, the lower mold drive shaft rotates to rotate the lower mold drive device and transmit the rotation to the outer shape lower mold to drive the lower mold. The shaft transmits the rotation to the upper mold drive shaft, the rotation is transmitted to the outer shape upper mold by the upper mold drive device, and the upper mold is pressed in a direction along the vertical direction with respect to the lower mold. At this time, the upper mold drive shaft and the upper mold drive device may be separated from each other in the direction along the vertical direction to release the joined state.

In this case, in the laminated steel sheet manufacturing apparatus, when the rotary drive source is driven in a state where the upper die and the lower die are separated in the vertical direction, the lower die drive device is rotated and the rotation is transmitted to the outer die. do. At the same time, the lower mold drive shaft transmits the rotation to the upper mold drive shaft, and the upper mold drive device transmits the rotation to the outer mold. Therefore, the outer die and the outer die can be rotated in synchronization with each other.

Further, when the upper mold is pressed in the direction along the vertical direction with respect to the lower mold, the upper mold drive shaft and the upper mold drive device are separated from each other in the direction along the vertical direction to release the joined state. Therefore, each time the upper mold is pressed, the phase difference between the upper mold drive device and the lower mold drive device is canceled, so that it is possible to eliminate the accumulation of errors.

Further, in the laminated steel plate manufacturing apparatus, the lower mold drive device passively transmits the rotation of the rotation drive source to the lower mold drive device (52) and the rotation of the drive belt, and the rotation of the drive belt is passive. A rotary drive pulley (50) that rotates synchronously with the lower mold drive shaft, a lower mold drive pulley (91) that rotates synchronously with the lower mold drive shaft, and the rotation of the lower mold drive pulley are transmitted to the outer shape lower mold. The upper mold drive device is provided with a lower mold drive belt (92), and the upper mold drive device holds an upper mold drive pulley (151) that rotates synchronously by engaging with the upper mold drive shaft and an upper mold drive pulley. The mold drive pulley holding portion (154) and the upper mold drive belt (152) for transmitting the rotation of the upper mold drive pulley to the outer mold upper mold are provided, and the outer mold lower mold is for driving the lower mold drive belt. The outer shape lower die pulley (33) is provided, and the outer shape lower die pulley (33) is integrally rotated with the rotation of the outer shape lower die pulley, and the outer shape upper die is driven by the upper die drive belt. (24) is provided, and the outer die is integrally rotated with the rotation of the upper die pulley, and the upper die drive pulley holding portion is directly or indirectly connected to the upper die, and the upper die is formed. It moves as it moves along the vertical direction, and the upper mold drive pulley and the upper mold drive shaft are relatively movable in the direction along the vertical direction, and the upper mold and the lower mold are relatively movable. In a state where the mold is separated from the mold in the vertical direction, the drive shaft elastic member presses the upper mold drive shaft against the upper mold drive pulley in a direction along the vertical direction to form a bonded state, and the rotation drive source rotates. Then, the drive belt is driven to rotate the rotary drive pulley to rotate the lower mold drive shaft, and the lower mold drive pulley is rotated to rotate to the outer shape lower mold via the lower mold drive belt. The lower mold drive shaft transmits the rotation to the upper mold drive shaft, the rotation is transmitted to the outer shape upper mold via the upper mold drive belt, and the upper mold transfers to the lower mold. On the other hand, when the upper die drive shaft and the upper die drive pulley are pressed in the direction along the vertical direction, the upper die drive shaft and the upper die drive pulley may be separated from each other in the direction along the vertical direction to release the joined state.

In this case, the laminated steel sheet manufacturing apparatus is configured to rotate the outer die and the outer die by the combination of the drive belt and the drive pulley. Therefore, the positional relationship between the rotation drive control device and the outer die and the outer die can be easily set. Further, when the outer die and the outer die are rotationally driven, the upper die drive shaft and the upper die drive pulley are in a joined state, and when the outer die is pressed against the outer die, the upper die is joined. The state is released and the state becomes separated. Therefore, the outer die and the outer die can be rotated in synchronization with each other. Further, since the phase difference between the upper mold driving device and the lower mold driving device is canceled each time the upper mold is pressed, it is possible to eliminate the accumulation of errors.

Further, the laminated steel plate manufacturing apparatus is provided with a balance correction unit (160) at a position where the outer die and the outer die are symmetrical to the rotation drive device with respect to the first central axis, and the balance is obtained. The correction unit includes a balance correction table (161) in the lower mold, a balance elastic member (164, 165, 166) between the balance correction table and the upper mold, and the balance elastic member is In the rotary drive device, it may be possible to prevent the upper mold from being tilted.

In this case, since the balance elastic member prevents the occurrence of inclination in the rotation drive device, the upper mold can move in a state where the balance is stable with respect to the lower mold. Further, the life of the laminated steel sheet manufacturing apparatus can be extended.

Further, the laminated steel plate manufacturing apparatus includes an adhesive coating device (4) for applying an adhesive (45) to the steel plate including the steel plate material in the upper mold, and the adhesive coating device is described as described above. A nozzle unit (40) for discharging the adhesive, an adhesive storage unit (46) for storing the adhesive, and a supply pipe (47) for supplying the adhesive from the adhesive storage unit to the nozzle unit are provided. In the nozzle unit, the nozzle (41) forming the nozzle ejection portion (140) for discharging the adhesive to the steel plate, the side of the adhesive storage portion is the upstream side, and the side of the nozzle unit is the downstream side. When the nozzle is inside, the nozzle on-off valve (42) for selectively supplying the adhesive from the upstream side to the downstream side and the nozzle can be moved in the direction along the vertical direction. The nozzle unit is provided with a nozzle holder (43) that supports the nozzle unit, and the nozzle unit moves in the same direction as the upper mold moves in the direction along the vertical direction, so that the nozzle is relative to the nozzle holder. It is possible to form a first state in which the nozzle is located on the downstream side and a second state in which the nozzle is located on the upstream side relative to the nozzle holder. When moving downward in the direction along the vertical direction, the nozzle ejection portion contacts the steel plate containing the steel plate material in the first state, and the upper mold further moves downward in the direction relatively along the vertical direction. When moved to the side, the nozzle forms the second state, the nozzle on-off valve opens, the flow path of the adhesive is formed inside the nozzle unit, and the upper mold is in the direction along the vertical direction. When the nozzle moves from the lower side to the upper side, the nozzle moves to the downstream side relative to the nozzle holder to form the first state, the nozzle on-off valve closes, and the nozzle is closed. The flow path of the adhesive may be blocked inside the unit.

In this case, the nozzle unit can form a first state of blocking the flow path of the adhesive and a second state of opening the flow path of the adhesive. The nozzle on-off valve is closed in the first state to block the flow path of the adhesive, and is open in the second state to form the flow path of the adhesive. The adhesive application device can form a state in which the adhesive is ejected from the nozzle ejection portion and a state in which the adhesive is not ejected. Therefore, the timing and amount of the adhesive applied can be controlled, and the adhesive can be applied in a fixed amount.

Further, in the laminated steel plate manufacturing apparatus, the nozzle on-off valve includes a first nozzle on-off valve (142), a first nozzle valve elastic member (143), a second nozzle on-off valve (144), and a second nozzle valve. The nozzle holder is composed of an elastic member (145) and a third nozzle on-off valve (146), and the nozzle holder forms a first adhesive flow path (148) extending in the vertical direction inside, and the nozzle is inside. A second adhesive flow path (147) extending in the vertical direction and a third adhesive flow path (150) connected to the nozzle discharge portion are formed in the first state, and the first nozzle on-off valve is in the first state. Is in contact with the nozzle holder to block the first adhesive flow path by the elastic force of the first nozzle valve elastic member, and the second nozzle on-off valve is contacted by the elastic force of the second nozzle valve elastic member. , The second adhesive flow path is closed, the third nozzle on-off valve is closed, and the third adhesive flow path is closed. In the second state, the nozzle is the first nozzle valve elastic member. By moving to the upstream side relative to the first nozzle on-off valve against the elastic force and creating a gap between the first nozzle on-off valve and the first nozzle on-off valve to open the first adhesive flow path. The adhesive flows into the second adhesive flow path, and the second nozzle on-off valve moves to the downstream side of the nozzle relative to the nozzle due to the pressure of the adhesive, and the second adhesive flow. The third adhesive flow path may be opened by opening a path and further expanding the third nozzle on-off valve by the pressure of the adhesive, and the adhesive may be supplied to the nozzle ejection portion.

In this case, the nozzle holder forms the first adhesive flow path, and the nozzle forms the second adhesive flow path and the third adhesive flow path connected to the nozzle ejection portion. The nozzle on-off valve includes a first nozzle on-off valve, a first nozzle valve elastic member, a second nozzle on-off valve, a second nozzle valve elastic member, and a third nozzle on-off valve. Since the first state and the second state are formed by the action of the above configuration, it is possible to more reliably form the state in which the adhesive is applied and the state in which the ejection of the adhesive is stopped.

Further, in the laminated steel plate manufacturing apparatus, when the third nozzle on-off valve is made of a member of a thin film having an elastic force and is located at a portion corresponding to the position of the center of the third adhesive flow path and is opened. The on-off valve hole (135) having a width smaller than the horizontal width in the third adhesive flow path is provided, and the on-off valve hole is in a closed state in the first state in which the pressure from the adhesive is not applied. In the second state, which is a state in which the adhesive is stopped from flowing from the second adhesive flow path to the third adhesive flow path and is subjected to pressure by the adhesive, the state is open. Then, the adhesive may flow from the second adhesive flow path to the third adhesive flow path.

In this case, since the third nozzle on-off valve is made of a thin film having elasticity, it can be opened and closed by the pressure of the adhesive. Therefore, it is possible to more reliably form a state in which the adhesive is applied and a state in which the ejection of the adhesive is stopped.

Further, in the laminated steel plate manufacturing apparatus, the nozzle unit is inside the outer die, is rotatable around the first central axis in synchronization with the outer die, and is in the vertical direction. It is movable in the direction along the vertical direction, and moves in conjunction with the movement of the outer die in the direction along the vertical direction, and the upper die moves downward in the direction along the vertical direction to move the lower end portion. When (225) comes into contact with the steel plate containing the steel plate material, there is a nozzle gap (255) in the vertical direction between the external mold and the nozzle unit, and the nozzle unit is direct or indirect. It may be rotatably connected to the supply pipe via a rotary joint (48).

In this case, the nozzle unit is inside the external mold and can rotate around the first central axis in synchronization with the external mold. Therefore, when the outer shape of the steel sheet is punched out, the adhesive application position relative to the outer shape of the steel sheet can be made constant.

Further, in the laminated steel plate manufacturing apparatus, the upper mold can move in a direction along a vertical direction with respect to a fixed punch plate (121) that rotatably supports the upper mold on the outer shape and the fixed punch plate. There is a relative rotation defect detection pin (123) having a cam portion (221), a detection pin elastic member (125) that presses the rotation defect detection pin in a direction along the vertical direction, and the rotation defect detection pin. A punch slide cam (124) that comes into contact with the cam portion and can move in the horizontal direction when moving upward is provided, and the punch slide cam has a punch cam recess (223) on the lower side in the vertical direction. The outer shape upper mold has an outer shape punch convex portion (228) protruding upward in the vertical direction, and the outer shape lower mold has a rotation defect detection hole into which the rotation defect detection pin can be inserted. (39) is provided, the upper mold moves downward in the direction along the vertical direction, and the tip portion (222) of the rotation defect detection pin is located at a position different from the position of the rotation defect detection hole. When the mold moves downward along the vertical direction and comes into contact with the upper end surface (247) of the outer shape lower mold, the punch slide cam engages with the cam portion of the rotation defect detection pin and is horizontal. Moving along the direction, the outer punch convex portion of the outer shape mold penetrates into the punch cam recess and moves upward in the vertical direction, and the outer shape mold is the lower end surface of the outer shape mold ( The movement is stopped in a state where the upper end surface (247) of the outer shape lower mold is separated from the 225), and the nozzle ejection portion of the nozzle unit is in contact with the steel plate containing the steel plate material. Further, when the upper mold moves upward in the direction along the vertical direction, the outer mold moves upward, and the nozzle unit is placed between the outer mold and the nozzle unit. The state in which the nozzle ejection portion is in contact with the steel plate containing the steel plate material may be maintained until the nozzle gap disappears.

In this case, when the upper die moves downward along the vertical direction in a state where the position of the tip of the rotation failure detection pin does not match the position of the rotation failure detection hole, the outer punch convex portion penetrates into the punch cam concave portion. do. In the outer die, only the amount of dent in the punch cam recess moves upward in the vertical direction, so even if the upper die moves toward the lower die, the outer die will reach the position of the steel plate material. Not reachable. Therefore, since the outer die is not in the correct position with respect to the outer die, the punching of the steel plate is stopped, so that the outer die and the lower die can be prevented from being damaged.

Further, the nozzle unit maintains a state in which the nozzle ejection portion is in contact with the steel plate while the nozzle gap is present when the mold is raised in appearance. That is, the nozzle unit behaves independently of the upper mold and the outer mold for a certain period of time. Therefore, even if a rotation defect occurs in the outer die, the nozzle unit in the adhesive coating device does not cause an interlocking defect.

Further, in the laminated steel plate manufacturing apparatus, the adhesive coating apparatus includes a nozzle elastic member (44) between the outer shape mold and the nozzle holder in the vertical direction, and the upper mold is in the horizontal direction. A nozzle slide cam (49) that is movable along the direction and has a nozzle cam recess (245) on the lower side in the vertical direction is provided, and the nozzle slide cam partially forms the nozzle cam recess. The nozzle unit having a surface (244) includes a nozzle engaging portion (241) that engages with the nozzle slide cam, and the upper mold moves downward in a direction along the vertical direction. When the steel plate is punched out by the outer shape mold and the outer shape lower mold, the nozzle engaging portion and the nozzle cam engaging surface other than the nozzle cam recess are engaged, and the nozzle ejection portion contains the steel plate material. It may be possible to select a state in which the nozzle is in close proximity to the steel plate and a state in which the nozzle engaging portion and the nozzle cam recess are engaged and the nozzle discharging portion is separated from the steel plate containing the steel plate material.

In this case, when the upper die moves downward in the vertical direction and the steel plate is punched out by the outer die and the outer die, the nozzle engaging portion engages with the nozzle cam engaging surface or the nozzle cam recess. The position of the nozzle ejection part can be selected depending on whether it engages with. Therefore, when the upper die moves downward in the vertical direction and punches out the outer shape of the steel sheet, it is possible to select whether to apply the adhesive to the steel sheet or stop the application.

Further, in the laminated steel sheet manufacturing apparatus, the adhesive is heat-curable, and the outer shape lower mold is a steel sheet guide extending downward in a direction along the vertical direction about the first central axis (C1). A road (36) is provided, and the steel plate guide path guides the steel plate punched by the outer shape upper mold and the outer shape lower mold to the lower side in the vertical direction, and is one of the steel plate guide paths. A steel plate alignment heating device (9) for forming a portion and heating the steel sheet is provided below the outer shape lower mold in the vertical direction, and at least a part of the steel plate alignment heating device is in contact with the steel plate. The steel sheets are aligned in the stacking direction in the steel sheet guide path, and the adhesive applied to the steel sheets by the adhesive coating device is cured by heating of the steel sheet alignment heating device and is vertically moved up and down. The laminated steel sheet (14) may be formed by adhering to each other with the steel sheets adjacent to at least one of the directions.

In this case, the steel sheet alignment heating device has a function of heating the steel sheet to cure the adhesive and adhering the steel sheet by contacting the side surface of the steel sheet, and a function of aligning the steel sheet in the stacking direction in the steel sheet guideway. can. Therefore, the steel sheet alignment heating device can form a laminated steel sheet by adhering the steel sheets in a state of being aligned in the laminating direction.

Further, in the laminated steel plate manufacturing apparatus, the steel plate alignment heating device includes a heating unit (7) for heating the steel plate or the laminated steel plate, and the heating unit is in a direction intersecting with the steel plate guide path. A plurality of heating movable portions (72) arranged so as to surround the steel plate guide path and movable toward the first central axis, a heating portion (74) for heating the heating movable portion, and the heating movable portion. A movable elastic member (73) that moves a movable elastic member (73) in a direction intersecting the first central axis, and a heating movable portion that guides the movement of the heating movable portion and can rotate around the first central axis together with the heating movable portion. The heated movable portion holder (71) is provided, and the heated movable portion holder is separated from the outer shape lower mold in the vertical direction, and the heated movable portion is separated from the outer peripheral portion of the steel plate by the elastic force of the movable elastic member. The steel sheets may be heated by pressure contact from a plurality of directions, and the steel sheets may be further aligned with the steel sheet guide paths.

In this case, since a plurality of heating movable parts are arranged so as to surround the steel sheet guide path, the steel sheet can be heated evenly. Therefore, the adhesive on the laminated steel sheet can be evenly cured to strengthen the adhesive force. Further, since the heating movable portion holder is separated from the outer die in the vertical direction, heat transfer to the outer die can be reduced.

Further, in the laminated steel sheet manufacturing apparatus, the lower mold driving device in the rotary driving device is
A heating device drive unit (93) that is rotationally driven by the rotation drive source is provided, and the heating device drive unit transmits the rotation of the heating device drive pulley (94) and the heating device drive pulley to the steel plate aligned heating device. A heating device drive belt (95) is provided, and the steel plate aligned heating device is provided with a heating device pulley (84) that is rotatable around the first central axis and passively rotates the heating device drive belt. By driving the heating device driving unit in synchronization with the lower mold driving device, the heating movable portion holder including the heating movable portion may be rotated in synchronization with the outer shape lower mold.

In this case, since the lower mold drive device includes a heating device drive unit that is rotationally driven by a rotation drive source, the heating movable portion holder including the heating movable portion can be rotationally driven independently of the outer mold, and is under the outer shape. It can be rotated in synchronization with the mold.

Further, the laminated steel sheet manufacturing apparatus includes a first steel sheet holding unit (8) for holding the steel sheet and restricting the drop of the steel sheet on the lower side in the vertical direction of the heating unit. The heated movable portion holder is provided with a connecting hole (76) that engages with the first steel plate holding unit, and the first steel plate holding unit forms a part of the steel plate guide path and is of the first central axis. A steel plate holding block (81) that can rotate around, a steel plate holding movable portion (82) that can move in a direction intersecting the first central axis with respect to the steel plate holding block, and a steel plate holding movable portion. The steel plate holding elastic member (83) that applies an elastic force in the direction toward the first central axis and the connecting pin (85) that engages with the connecting hole are provided, and the steel plate holding movable portion has the steel plate holding elasticity. The outer peripheral portion of the laminated steel sheet is pressed by the pressure of the member, the heating device pulley is formed on the steel plate holding block, and when the rotation drive source is driven, the heating device pulley passively rotates the heating device drive belt. Then, the steel plate holding block and the steel plate holding movable portion may be rotated, and the heated movable portion holder may be further rotated via the connecting pin and the connecting hole.

In this case, since the steel plate holding movable portion of the first steel plate holding unit contacts and holds the outer peripheral portion of the laminated steel plate, it is possible to prevent the laminated steel plate, which is heavier than the steel plate, from falling. Further, since the heating device pulley formed on the steel plate holding block rotates the heating movable portion holder via the connecting pin and the connecting hole, the steel plate holding movable portion and the heating movable portion holder can be rotated in synchronization with each other.

Further, the laminated steel sheet manufacturing apparatus includes a second steel sheet holding unit (108) for holding the steel sheet and restricting the drop of the steel sheet on the lower side in the vertical direction of the heating unit. The heated movable portion holder is provided with a connecting hole (76) that engages with the second steel plate holding unit, and the second steel plate holding unit forms a part of the steel plate guide path and is of the first central axis. A steel plate holding block (88) that can rotate around, a contact convex portion (89) in the steel plate holding block that contacts the steel plate or the laminated steel plate, and a connecting pin (85) that engages with the connecting hole. The contact convex portion is in contact with and held on the outer peripheral portion of the laminated steel sheet, the heating device pulley is formed on the steel sheet holding block, and when the rotation drive source is driven, the heating device pulley is said. The rotation of the heating device drive belt may be passively rotated to rotate the steel plate holding block, and further, the heating movable portion holder may be rotated via the connecting pin and the connecting hole.

In this case, since the contact convex portion in the steel plate holding block of the second steel plate holding unit contacts and holds the outer peripheral portion of the laminated steel plate, it is possible to prevent the laminated steel plate, which is heavier than the steel plate, from falling. Further, since the heating device pulley formed on the steel plate holding block rotates the heating movable portion holder via the connecting pin and the connecting hole, the steel plate holding movable portion and the heating movable portion holder can be rotated in synchronization with each other.

Further, in the laminated steel sheet manufacturing apparatus, a part of the lower end portion in the vertical direction of the outer shape lower die and a part of the upper end portion of the heating movable part holder of the steel plate alignment heating device are formed in the outer shape lower die. A first convex shape portion (248) is formed, a first concave shape portion (249) corresponding to the first convex shape portion is formed on the heating movable portion holder, and a lower end portion in the vertical direction of the heating movable portion holder is formed. And a part of the upper end portion of the steel plate holding block form a second convex shape portion (258) on the steel plate holding block, and the heated movable portion holder corresponds to the second convex shape portion. The two concave shape portions (259) are formed, and the outer shape lower mold and the heating movable portion holder are in a direction in which the first convex shape portion and the first concave shape portion intersect with the first central axis. The lower side surface (266) forming the lower end of the outer shape lower mold and the upper side surface (267) forming the upper end of the heating movable part holder are separated from each other in the vertical direction. The center position of the portion of the steel plate guide path formed by the outer die and the portion formed by the heated movable portion holder coincides with the first central axis, and the heated movable portion holder and the steel plate holding block are formed. Means that the second convex portion and the second concave portion are in contact with each other and engaged with each other, and the portion of the steel plate guide path formed by the heated movable portion holder and the portion formed by the steel plate holding block. The center position of may coincide with the first central axis.

In this case, only the first convex shape portion and the first concave shape portion of the outer shape lower mold and the heating movable part holder are in contact with each other and engage with each other, and the lower end of the outer shape lower mold is formed in the vertical direction. The lower side surface and the upper side surface forming the upper end of the heating movable part holder are separated from each other. The center position of the portion of the steel plate guide path formed by the outer die and the portion formed by the heated movable portion holder coincides with the first central axis. Therefore, the center positions of the steel plate guide paths between the outer die and the heated movable portion holder can be matched. Since only the first convex shape portion and the first concave shape portion contact and engage with the outer shape lower mold and the heating movable part holder, the heat transfer from the heating movable part holder to the outer shape lower mold should be limited. Can be done.

Further, the heated movable portion holder and the steel plate holding block are in contact with each other in contact with the second convex portion and the second concave shaped portion, and the portion of the steel plate guide path formed by the heated movable portion holder and the steel plate holding block. The center position with the portion formed by is aligned with the first central axis. Therefore, in the vertical direction, the center position of the steel plate guide path connected from the outer die to the steel plate holding block can be matched.

Further, in the laminated steel plate manufacturing apparatus, there are a plurality of connecting pins on the same circumference centered on the first central axis, and the connecting holes are formed corresponding to the positions of the connecting pins. The length (77) in the direction intersecting the first central axis is equal to or larger than the diameter of the connecting pin, and the width (78) in the circumferential direction about the first central axis and the diameter of the connecting pin. The relationship is that the width in the circumferential direction is equal to or larger than the diameter of the connecting pin, and the gap between the two is about the degree of fine rotation in the gap fitting, and the heating portion is movable by heating. When the heated movable portion holder thermally expands by heating the portion, the connecting hole has the end portion (86) on the side of the first central axis and the first portion in the direction intersecting the first central axis. Engages with the connecting pin in the circumferential direction about one central axis, and the steel plate holding block and the heated movable portion holder intersect the first central axis with the first central axis as the center. You may prevent each other from moving in the direction and in the circumferential direction about the first central axis.

In this case, when the heated movable part holder thermally expands, the connecting pin and the connecting hole engage with each other, and the direction intersecting the first central axis with the first central axis as the center and the circumference centered on the first central axis. Prevent each other's movements in the direction. Therefore, the heated movable part holder and the steel plate holding block are integrated in a state where the center positions of the steel plate holding blocks are more reliably aligned with each other about the first central axis. maintain.

Further, in the laminated steel plate manufacturing apparatus, the end portion on the side of the first central axis is formed with a radius equal to or larger than the radius (79) of the connecting pin in the direction in which the connecting hole intersects the first central axis. It may be an opening having a circular arc shape, and the width in the circumferential direction becomes wider as the distance from the first central axis increases.

In this case, when the heated movable portion holder thermally expands, the connecting pin engages more securely in the arc-shaped portion of the connecting hole, so that the center positions of the heated movable portion holder and the steel plate holding block are maintained in the same state. be able to.

Further, in the laminated steel plate manufacturing apparatus, the lower die includes a cooling device (6) above the steel plate aligned heating apparatus in the vertical direction, and the cooling apparatus forms a part of the steel plate guide path. The cooling guide path (35), which is formed integrally with the outer shape lower mold or is connected to the outer shape lower mold and rotates in synchronization with the outer shape lower mold, and the outer shape lower mold are fixed to the outer peripheral side of the cooling guide path. An inner cooling unit (61) that rotates synchronously with the mold, an outer cooling unit (62) that is on the outer peripheral side of the inner cooling unit and is directly or indirectly fixed to the lower mold, and the inner cooling unit. The cooling agent circulation unit (64) formed between the outer cooling unit and the cooling agent supply unit (65) for supplying the cooling agent (260) to the cooling agent circulation unit is provided, and the cooling agent is the inner side. It may be possible to circulate on the outer periphery of the inner cooling unit as the cooling unit rotates.

In this case, the cooling device forms a coolant circulation portion between the inner cooling portion that rotates synchronously with the outer mold and the outer cooling portion that is directly or indirectly fixed to the lower mold. Therefore, since the cooling agent circulates in the cooling agent circulation portion in the circumferential direction, the inner cooling portion can be cooled with respect to the entire circumferential direction. Further, the outer die that comes into contact with the inner cooling portion can be cooled.

Further, in the laminated steel plate manufacturing apparatus, the cooling apparatus further includes a first opening (66) and a drain gutter (96, 97) in the outer cooling portion, and is directly or indirectly connected to the lower mold. The outer cooling unit fixing table (63) is provided, the outer cooling unit is fixed to the outer cooling unit fixing table, and the outer cooling unit fixing table forms a second opening (67). The coolant circulation unit forms a closed space except for the first opening and the drain gutter, and the coolant supply unit is connected to the coolant cooling unit (69) and the coolant cooling unit. It comprises at least two cooling pipes (68) for supplying the cooling agent, the at least one cooling pipe is connected to the cooling agent circulation portion through the first opening, and the other cooling pipe is the first. The cooling agent, which is connected to the cooling agent circulation portion through the two openings and cools the inner cooling portion in contact with the cooling guide path to raise the temperature, passes from the drain gutter through the second opening. The cooling agent can be circulated by lowering the temperature in the cooling agent cooling unit and further supplying the cooling agent to the cooling agent circulation unit via the cooling pipe, and the cooling agent can be circulated on the outer periphery of the inner cooling unit. good.

In this case, the cooling device includes a cooling agent cooling unit, and can cool the cooling agent whose temperature has risen and circulate it to the cooling agent circulation unit through the cooling pipe. Therefore, the cooling device can have the effect of continuously cooling the cooling guide path.

Further, in the laminated steel sheet manufacturing apparatus, the lower mold is connected to the coolant circulation portion at the upper end portion in the vertical direction of the inner cooling portion, and the inner cooling portion in the coolant circulation portion is connected in the circumferential direction. A groove-shaped first coolant reservoir (263) having a gap larger than the gap between the outer cooling portion and the outer cooling portion, and the outer cooling portion fixing base, which is located below the inner cooling portion in the vertical direction. , A groove-shaped second coolant reservoir (264) that is continuous with the coolant circulating portion and has a gap larger than the gap between the inner cooling portion and the outer cooling portion may be provided.

In this case, in the cooling device, when the coolant flowing into the coolant circulation portion spreads upward and downward in the vertical direction of the coolant circulation portion, the coolant is accumulated in the first coolant reservoir and the second coolant reservoir. .. Therefore, it is possible to prevent the coolant from flowing out to the outside of the cooling device.

The method for manufacturing a laminated steel plate according to the second aspect of the present invention is a manufacturing method for manufacturing a laminated steel plate by laminating a steel plate (17) punched into a predetermined shape from a steel plate material, wherein the steel plate is formed from the steel plate material. A mold (10) consisting of an upper mold (2) including an outer outer mold (20) and a lower mold (3) including an outer lower mold (30) and the outer outer mold are paired for punching. A rotary drive device (5) that rotationally drives the outer shape lower mold, and an adhesive application device (4) that applies an adhesive (45) to the steel plate including the steel plate material in the upper mold. And, in the outer shape lower mold, the steel plate guide path (36) extending downward in the direction along the vertical direction, and in the steel plate guide path, in the lower side in the vertical direction than the outer shape lower mold. A steel plate alignment heating device (9) for heating the steel plate and a laminated steel plate manufacturing apparatus in the lower mold provided with a cooling device (6) above the steel plate alignment heating device in the vertical direction are used. Then, in the first step of moving the upper die to the lower side in the direction along the vertical direction and punching the steel plate by the outer shape upper mold and the outer shape lower mold, and in connection with the first step, The second step of applying the adhesive to the steel plate by the adhesive coating device and the adhesive applied to the steel plate by contacting and heating the outer peripheral side surface of the punched steel plate by the steel plate alignment heating device. It consists of a third step of curing and aligning the steel plates in the stacking direction, and a fourth step of rotating the outer shape upper mold and the outer shape lower mold by a predetermined angle (θ) by the rotation driving device. The first step and the third step are performed every time the steel plate is punched, the second step is stopped every time a predetermined number of the steel plates are punched, and the fourth step is every time the steel plate is punched. Alternatively, each time a predetermined number of the steel sheets are punched out.

According to this, in the laminated steel sheet manufacturing method, the first step to the fourth step are performed when manufacturing the laminated steel sheet. The fourth step is performed every time one steel sheet is punched out, or every time a predetermined number of steel sheets are punched out. Therefore, regardless of the outer shape of the steel sheet, it is possible to manufacture a laminated steel sheet in which the deviation in thickness is reduced even if there is a deviation in the thickness of the steel sheet material.

It is sectional drawing which cut along the transfer direction of the steel plate material 16 including the strip-shaped steel plate in the laminated steel plate manufacturing apparatus 100. FIG. 3 is a cross-sectional view showing a cross section I-I of FIG. 1 in a laminated steel sheet manufacturing apparatus 100, showing a state in which the upper die is at top dead center. FIG. 3 is a cross-sectional view showing a cross section I-I of FIG. 1 in a laminated steel sheet manufacturing apparatus 100, showing a state in which the upper die is at the bottom dead center. It is a detailed view of the upper die 2 (top dead center) in FIG. 2 in a laminated steel sheet manufacturing apparatus 100. It is a detailed view of the upper die 2 (bottom dead center) in FIG. 3 in a laminated steel sheet manufacturing apparatus 100. 2 is a detailed view of the outer shape lower die 30 in FIGS. 2 and 3 in the laminated steel sheet manufacturing apparatus 100. It is a detailed view of the rotation drive device 5 (top dead center) in FIG. 2 in the laminated steel sheet manufacturing apparatus 100. It is a detailed view of the rotation drive device 5 (bottom dead center) in FIG. 3 in the laminated steel sheet manufacturing apparatus 100. It is a detailed view comparing the main parts of the rotary drive device 5 in FIGS. 7 and 8, in the laminated steel sheet manufacturing apparatus 100, FIG. The state where the upper mold 2 is at the bottom dead center is shown. It is a figure which shows the laminated steel sheet manufacturing apparatus 200, and is the figure which corresponds to FIG. 3 in the laminated steel sheet manufacturing apparatus 100. FIG. 10 is a detailed view illustrating the periphery of the drive shaft elastic member 256 of the rotary drive device 5 in FIG. 10. It is a figure which shows the laminated steel sheet manufacturing apparatus 300, and is the figure which corresponds to FIG. 3 in the laminated steel sheet manufacturing apparatus 100. 12 is a diagram showing a main part of the upper mold driving device 15 in FIG. 12, in which (a) the upper mold 2 is at the top dead center and (b) the upper mold 2 is at the bottom dead center. It is a figure comparing. It is a figure which shows the laminated steel sheet manufacturing apparatus 400, and is the figure which corresponds to FIG. 3 in the laminated steel sheet manufacturing apparatus 100. 14 is a detailed view illustrating the periphery of the drive shaft elastic member 256 of the rotary drive device 5 in FIG. 14. It is a figure which shows the laminated steel plate manufacturing apparatus 500, which corresponds to FIG. 1 in the laminated steel plate manufacturing apparatus 100, and shows the example which the mold 20 does not rotate on the outer shape, and only the mold 30 under the outer shape rotates. 16 is a cross-sectional view taken along the line VV of FIG. It is a detailed view of the main part of the nozzle unit 40 in the adhesive application apparatus 4, and shows the 1st state which does not eject an adhesive 45. It is a detailed view of the main part of the nozzle unit 40 in the adhesive application apparatus 4, and shows the 2nd state which discharges an adhesive 45. It is a detailed view around the nozzle discharge part 140 in FIG. It is a detailed view which shows the state when the outer die 11 is rotation failure with respect to the state of FIG. 5 in the laminated steel sheet manufacturing apparatus 100. It is a detailed view around the nozzle discharge part 140 in FIG. 21. It is explanatory drawing of the structure which prevents the adhesive 45 from being ejected when the upper mold 2 is pushed toward the lower mold 3 in the adhesive coating apparatus 4. It is a top view which shows the 1st example of the heating unit 7 in the laminated steel sheet manufacturing apparatus 100. It is a top view which shows the 2nd example of the heating unit 7 in the laminated steel sheet manufacturing apparatus 100. It is a top view which shows the 1st steel plate holding unit 8 in the laminated steel plate manufacturing apparatus 100. It is sectional drawing which showed the cross section II-II and the cross section III-III together in FIGS. 24 to 26. An example of the relationship between the connecting hole 76 and the connecting pin 85 in FIGS. 24 and 25 is a diagram comparing before and after the thermal expansion of the heated movable portion holder 71, and (a) is a state before the thermal expansion. (B) shows the state when it is thermally expanded. It is a top view which shows the 2nd steel plate holding unit 108 in the laminated steel plate manufacturing apparatus 100. 24 is a cross-sectional view showing a cross section II-II in FIGS. 24 and 25 and a cross section IV-IV in FIG. 29 together. It is sectional drawing which shows the 1st example of a cooling device 6. It is a cross-sectional view in a plane direction which shows the 2nd example of a cooling apparatus 6, and is the cross-sectional view of the substantially central position in a vertical direction (the cross-sectional view in the central axis C3 in the plane direction of FIG. 33). It is sectional drawing which shows the 2nd example of the cooling apparatus 6 in FIG. 32. It is a figure explaining the process of producing a steel plate 17, and shows the case where the outer shape is relatively different from the case before the rotation when the steel plate 17 is rotated by a predetermined angle, and the outer die is formed every time one steel plate 17 is punched out. A case is shown in which the 20 and the outer die 30 are rotated at a predetermined angle θ in synchronization with each other to punch out the next steel plate 17. It is a figure explaining the process of producing a steel plate 17, and shows the case of point symmetry in which the outer shape becomes relatively the same before and after rotation that the steel plate 17 rotates by a predetermined angle θ, and every time the steel plate 17 is punched out, the outer shape lower mold The case where the next steel plate 17 is punched out after rotating only a predetermined angle θ is shown. It is a block diagram which shows the control device 90 such as a laminated steel plate manufacturing apparatus 100.

Hereinafter, a laminated steel sheet manufacturing apparatus and a laminated steel sheet manufacturing method that embody the present invention will be described with reference to the drawings. The drawings referred to are used to illustrate the technical features that may be employed in the present invention. The configuration of the device described in the drawings is not limited to that, but is merely an explanatory example.

<Mold configuration common to laminated steel sheet manufacturing equipment 100 to laminated steel plate manufacturing equipment 400>
First, among the laminated steel sheet manufacturing devices according to the first aspect of the present invention, a configuration common to the laminated steel sheet manufacturing device 100 of the first embodiment to the laminated steel sheet manufacturing device 400 of the fourth embodiment will be described. As shown in FIGS. 1 to 3, a laminated steel sheet manufacturing apparatus 100 or the like is a manufacturing apparatus for manufacturing a laminated steel sheet 14 by laminating a steel plate 17 punched and formed from a steel plate material 16 into a predetermined shape. In order to punch out the steel plate 17 from the steel plate material 16, a mold 10 including a pair of upper dies 2 and lower dies 3 is provided. The upper mold 2 and the lower mold 3 are relatively movable along the vertical direction.

The die 10 includes an outer die 11 including an outer die 20 for punching the outer shape of the steel plate 17 and an outer die 30. FIG. 2 shows a state in which the upper mold 2 stands by on the upper side (top dead point) in the direction along the vertical direction with respect to the lower mold 3, and FIG. 3 shows the upper mold 2 with respect to the lower mold 3. It shows a state (bottom dead point) in which the outer shape of the steel plate 17 is punched by pressing.

The outer die 20 is rotatable around the first central axis C1 extending vertically with respect to the upper die 2, and the outer die 30 is the first central axis C1 with respect to the lower die 3. It is rotatable around. When the steel plate 17 is punched and formed, each time the steel plate 17 is punched out or a predetermined number of steel plates 17 are punched out, the outer die 20 and the outer die 30 are rotated by a predetermined angle θ, respectively. With the relative positions aligned with each other, the steel plate 17 is punched out from the steel plate material 16 and the steel plates 17 are laminated to form a laminated steel plate 14.

In the example shown in FIG. 1, the laminated steel sheet manufacturing apparatus 100 and the like are so-called progressive press dies. The steel plate material 16 is a strip-shaped steel plate, and the steel plate 17 is formed by a plurality of punching steps while transferring the steel plate material 16 by the transfer device 12. The steel plate 17 is formed by a plurality of punching steps. The portion of the steel plate 17 excluding the outer shape is formed by the auxiliary upper mold 320 and the auxiliary lower mold 330, and the outer shape of the steel plate 17 is formed by the outer shape upper mold 20 and the outer shape lower mold 30. The laminated steel sheet manufacturing apparatus 100 and the like may be a single-shot press die instead of a progressive press die.

Details will be described later, but as shown in FIGS. 34 and 35, the subsidy mold 13 is a plurality of subsidy molds 13 from the first subsidy mold 311 to the third subsidy mold 313 or the fourth subsidy mold 314. And the outer mold 11, the steel plate 17 is formed.

<Structure of rotatable outer die 20 and outer die 30>
Next, the configurations of the rotatable upper mold 20 and the lower mold 30 will be described with reference to FIGS. 4 to 6. The member constituting the outer peripheral mold 20 forms a substantially cylindrical outer peripheral surface 29 having a substantially cylindrical shape centered on the first central axis C1 at least a part of the outer circumference. In the upper mold 2, a portion accommodating the outer mold 20 forms a cylindrical upper mold opening 127. A portion facing the outer mold 20 and the upper mold 2 including the space between the outer peripheral surface 29 of the outer mold and the upper mold opening 127 includes a bearing member 28.

The outer die 20 is slidable and rotatable with respect to the upper die 2 via the bearing member 28. The member constituting the outer peripheral mold 30 forms a substantially cylindrical outer peripheral surface 38 having at least a part of the outer circumference centered on the first central axis C1. In the lower mold 3, a portion accommodating the outer mold 30 forms a cylindrical lower mold opening 136. A bearing member 28 is provided at a portion where the outer mold 30 and the lower mold 3 face each other, including between the outer peripheral surface 38 of the outer mold and the lower mold opening 136. The outer shape lower mold 30 is slidable and rotatable with respect to the lower mold 3 via the bearing member 28.

The bearing member 28 is, for example, a ball retainer bearing. The ball retainer bearing has a configuration in which the ball bearing is held by a holder, and slides between the outer die 20 and the upper die 2 and between the outer die 30 and the lower die 3 in the present invention. Suitable for dynamic rotation.

<Detailed explanation of the outer mold 20>
Next, the configuration of the external mold 20 will be described in detail with reference to FIGS. 4 to 6. The outer shape punch 21 in the outer shape die 20 and the outer shape punching die 31 in the outer shape lower die 30 are configured to rotate synchronously within the period between the punching steps. That is, the outer die 20 has a configuration in which the outer punch 21 and all the members to be connected rotate in synchronization with each other. The outer die 30 has a structure in which the outer die 31 and all the members to be connected rotate in synchronization with each other.

The outer die 20 has the following configuration in order to smoothly rotate the outer punch 21. When viewed from the upper side in the vertical direction, the outer rotation punch head 23 of the outer die 20 has a cylindrical cylinder shape as the outer outer surface 29 of the outer die, and is the inner circumference of the upper die subplate 122 of the upper die 2. Formes a cylindrical upper die opening 127 corresponding to the external rotary punch head 23. A ball retainer bearing as a bearing member 28 is provided between the external rotation punch head 23 and the upper sub-plate 122, and the external rotation punch head 23 rotates smoothly. Assemble the ball retainer bearing with a negative press-fit tolerance. The same applies to the ball retainer bearings described below.

In the outer die 20, the outer rotary punch head 23 is connected to the lower side of the outer rotary punch head 23, and when the outer die pulley 24 rotates, the outer rotary punch head 23 rotates. The lower side of the outer shape pulley 24 is connected to the rotary punch plate 27, and the outer peripheral punch 21 is connected to the inner peripheral side of the rotary punch plate 27. The outer periphery of the rotary punch plate 27 has a cylindrical cylinder shape as the outer peripheral surface 29 of the mold on the outer shape, similarly to the outer rotary punch head 23. The inner circumference of the first fixed punch plate 121 of the upper die 2 forms a cylindrical upper die opening 127 corresponding to the rotary punch plate 27. The lower side of the rotary punch plate 27 is supported by a second fixed punch plate 129 formed on the upper die 2. A ball retainer bearing is provided as a bearing member 28 between the rotary punch plate 27 and the first fixed punch plate 121 and the second fixed punch plate 129.

The outer die 20 forms a rotary stripper 22 under the rotary punch plate 27. The rotary stripper 22 includes a rotary stripper holder 226 and a rotary stripper plate 227. The rotary stripper plate 227 is coupled to the rotary stripper holder 226 and rotates integrally. The rotary stripper 22 and the outer punch 21 can move with each other in the direction along the vertical direction. The rotary stripper 22 includes a stripper elastic member 220 between the rotary stripper 22 and the rotary punch plate 27.

The rotary stripper plate 227 applies a compressive force on the surface of the steel plate material 16 before punching the steel plate 17 by the stripper elastic member 220, and restrains the steel plate material 16. Further, after the outer punch 21 punches and penetrates the steel plate 17, the state in which the outer punch 21 presses and holds the steel plate 17 until it comes out from the steel plate 17 in the vertical direction is maintained. The rotary stripper plate 227 sequentially separates from the surface of the steel plate 17 after the outer punch 21 comes out from the steel plate 17 upward in the vertical direction. The rotary stripper 22 is provided with a ball retainer bearing as a bearing member 28 between the rotary stripper holder 128 and the fixed stripper holder 128, and is rotatable.

As shown in FIG. 4, the rotary stripper 22 is fixed to the fixed stripper holder 128 by the auxiliary plate 130 and bolts. As shown in FIG. 2, the stripper bolt 111 penetrates the first fixed punch plate 121 and fastens the fixed stripper holder 128. The stripper bolt 111 is connected to the upper mold 2 via the stripper bolt elastic member 112. The first fixed punch plate 121 is relatively movable in the direction along the vertical direction with respect to the stripper bolt 111. The stripper bolt 111 and the stripper bolt elastic member 112 are provided at a plurality of locations and elastically support the vertical position of the fixed stripper holder 128 with respect to the upper mold 2.

<Detailed explanation of the outer die 30>
Next, the configuration of the outer shape lower mold 30 will be described in detail with reference to FIG. The outer shape lower mold 30 is composed of the following components from the upper side to the lower side in the direction along the vertical direction. The uppermost side forms the outer shape punching die 31, then the first squeeze ring 34, and the die holder 32 covers the outer periphery of the outer shape punching die 31 and the first squeeze ring 34. The lower side of the die holder 32 is fastened with a cooling guide path 35 by bolts. An outer shape lower type pulley 33 is formed on the outer periphery of the upper side of the cooling guide path 35. The first squeeze ring 34 and the cooling guide path 35 form a part of the steel plate guide path 36. Further, the cooling guide path 35 forms a part of the cooling device 6 described later.

As will be described later, the adhesive 45 is applied to the steel plate 17 or the steel plate material 16 by the adhesive application device 4. The first squeeze ring 34 and the cooling guide path 35 apply lateral pressure to the outer circumference of the steel plate 17. Further, the steel plates 17 are laminated by receiving a downward pressure in the direction along the vertical direction generated when the outer shape is punched. The adhesive 45 between the steel plates 17 to be laminated has a thin film and a thickness of a micrometer level.

In the lower mold 3, the die holder housing 132 covers the outer periphery of the die holder 32 via the ball retainer bearing as the bearing member 28. Further, the cooling guide path housing 131 covers a part of the outer periphery of the cooling guide path 35 via the ball retainer bearing as the bearing member 28. The inner circumferences of the die holder housing 132 and the cooling guideway housing 131 form a cylindrical lower mold opening 136. The outer periphery of the die holder 32 and the cooling guide path 35 is an outer peripheral surface 38 of an outer die having a cylindrical cylinder shape. With this configuration, the outer shape lower mold 30 can rotate about the first central axis C1 with respect to the lower mold 3.

<Outline explanation of the rotary drive device 5 of the outer die 20 and the outer die 30>
Next, with reference to FIGS. 7 to 9, a rotary drive device 5 for rotationally driving the outer die 20 and the outer die 30 will be described. The rotation drive device 5 includes an upper mold drive device 15 for rotating the outer mold 20, a lower mold drive device 19 for rotating the outer lower mold 30, an upper mold drive device 15, and a lower mold drive device. A rotary drive source 51 for rotationally driving the 19 is provided. Further, a rotation drive control device 54 for controlling the drive of the rotation drive source 51 is provided.

The rotation drive control device 54 drives the rotation drive source 51 in a state where the upper mold 2 and the lower mold 3 are separated from each other in the vertical direction. Further, the rotation drive source 51 is rotated and controlled so that the outer die 20 and the outer die 30 are rotated by a predetermined angle θ each time one steel plate 17 is punched out or every time a predetermined number of steel plates 17 are punched out. do. Specifically, the steel plate 17 may be driven and rotated each time it is punched, or a predetermined number of sheets may be set. For example, when the set number of sheets is 5, the steel plate 17 may be driven and rotated every time 5 sheets are punched. You may let me.

<Problems solved by the mold configuration common to each embodiment and the rotary drive device and their effects>
As described above, the configuration of the mold 10 common to each embodiment in the laminated steel sheet manufacturing apparatus 100 and the like solves various problems and is effective.

In the conventional laminated steel sheet manufacturing apparatus, as a configuration for performing rolling, the die in the lower die is rotated to perform rolling, and the punch in the upper die is fixed. Therefore, it is a condition that the single steel plate and the laminated steel plate to be manufactured have a point-symmetrical shape, and there is a problem that a non-point-symmetrical shape cannot be dealt with. The laminated steel sheet constituting the iron core of the armature has various shapes, and there is a problem that the applicable range is narrowed if the shape is point-symmetrical. The above is the first issue of mold composition.

The configuration of the laminated steel sheet manufacturing apparatus 100 and the like of the present invention solves this problem. When the laminated steel sheet manufacturing apparatus 100 or the like forms the steel sheet 17 according to the configurations shown in FIGS. 2 and 3, the outer die 20 and the outer die 30 are each rotated by a predetermined angle θ and relative to each other. The steel plate material 16 can be punched out and the steel plates 17 can be laminated in a state where the positions are matched. Therefore, since the steel plate 17 can be laminated by laminating after being rotated by a predetermined angle θ without limitation of the outer shape, it is possible to reduce the deviation in the thickness direction after laminating the steel plate 17.

As an example, conventionally, as shown in FIG. 35, it has been possible to deal with only the case where the steel plate 17 has an outer shape point-symmetrical with respect to the center (first central axis C1). When the outer shape lower mold 30 is rotatable, when the outer shapes before and after rotation at a predetermined angle θ are overlapped as shown in FIG. 34, it is not possible to cope with different outer shapes. For example, the outer shape is T-shaped. On the other hand, in the present invention, since the outer die 20 and the outer die 30 rotate in synchronization with each other, the outer shape is not limited to the point-symmetrical one, and various outer shapes can be dealt with. Further, since the predetermined angle θ can be arbitrarily set, there is a high degree of freedom when setting the outer shape.

Next, in the mold configuration of the laminated steel sheet manufacturing apparatus 100 and the like, as the second problem, in order to rotate the outer die 20 and the outer die 30, stable rotation and centering before and after rotation. There is a problem of preventing the position from shifting. The configuration of the laminated steel sheet manufacturing apparatus 100 and the like according to the first aspect of the present invention solves this problem.

As shown in FIGS. 2 to 6, the laminated steel sheet manufacturing apparatus 100 and the like include the outer die 20 and the upper die 2 including the space between the outer die outer peripheral surface 29 and the upper die opening 127. The portion facing the bearing member 28 is provided. A bearing member 28 is provided at a portion where the outer mold 30 and the lower mold 3 face each other, including between the outer peripheral surface 38 of the outer mold and the lower mold opening 136. Therefore, the outer shape upper mold 20 can stably slide and rotate with respect to the upper mold 2 and the outer shape lower mold 30 does not rotate with respect to the lower mold 3.

As described above, the outer peripheral surface 29 of the outer die corresponds to the outer peripheral surfaces of the outer rotary punch head 23, the rotary punch plate 27, and the rotary stripper 22. The upper mold opening 127 corresponds to the inner peripheral surfaces of the upper mold sub-plate 122, the first fixed punch plate 121, and the fixed stripper holder 128. The outer peripheral surface 29 of the outer mold has a cylindrical shape, and the upper mold opening 127 is a cylindrical opening corresponding to the outer peripheral surface 29 of the outer mold. Therefore, the upper mold 2 and the outer mold 20 rotate smoothly without rotational runout due to the ball retainer bearing as the bearing member 28 interposed therein.

Next, as a third problem, the mold configuration of the laminated steel sheet manufacturing apparatus 100 or the like needs to be provided with an appropriate drive device for rotating the outer mold 20 and the outer mold 30 in synchronization with each other. .. If the outer die 20 and the outer die 30 rotate independently without being linked, synchronization may not be successful and the laminated steel sheet manufacturing apparatus 100 or the like may be damaged, which is a problem to be solved. .. The laminated steel sheet manufacturing apparatus 100 and the like according to the first aspect of the present invention solves this problem.

As shown in FIGS. 7 and 8, in the laminated steel sheet manufacturing apparatus 100 and the like, the outer die 20 and the outer die 30 can be rotated by one rotary drive source 51. Therefore, the rotary drive device 5 can be miniaturized and the cost of the device can be reduced. Further, since the rotation drive control device 54 controls the steel plate 17 to be rotated by a predetermined angle by a predetermined angle for each predetermined number of sheets including one sheet, the step of reducing the deviation in the thickness direction after laminating the steel sheets 17 is accurate. Can be done.

The predetermined number of sheets when the outer mold 20 and the outer mold 30 are rotated by a predetermined angle θ can be arbitrarily set. For example, the outer die 20 and the outer die 30 may be rotated every time one steel plate 17 is punched out, or may be set to 5, for example, and rotated every time five steel plates 17 are punched out. good. There is also an effect that it can be set according to the degree of deviation in the thickness of the steel plate material 16.

<Overview of common configuration of rotary drive device 5>
Next, with reference to FIGS. 7 to 9, the configuration of the rotary drive device 5 common to the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment will be described. The rotation drive device 5 includes a rotation drive shaft 55 that transmits the rotation of the rotation drive source 51 to the outer mold 20 and the outer mold 30, and a drive shaft support base 53 that supports the rotation drive shaft 55. Further, a drive shaft elastic member 156 that applies an elastic force downward in the vertical direction to the rotary drive shaft 55 from either the drive shaft support 53 or the upper mold 2 is provided. The rotation drive shaft 55 is rotatable around the second central shaft C2.

The rotary drive shaft 55 is located on the upper side in the vertical direction and engages with the upper mold drive device 15, and the lower mold is located on the lower side in the vertical direction and engages with the lower mold drive device 19. It is composed of a drive shaft 58, and the upper drive shaft 56 and the lower drive shaft 58 engage with each other in the rotation direction. The upper mold driving device 15 is connected to the upper mold 2 and moves in the same direction as the upper mold 2 moves along the vertical direction.

As an example, the portion where the upper drive shaft 56 and the lower drive shaft 58 engage is a convex portion having a cross-shaped cross-sectional shape on one side and a concave portion having a cross-shaped cross-sectional shape on the other side. The convex portion and the concave portion are slidable in the vertical direction, and are precisely finished to the extent that a gap is not generated as much as possible in the rotational direction.

The upper mold drive device 15 and the upper mold drive shaft 56 are relatively movable in the direction along the vertical direction. In a state where the upper mold 2 and the lower mold 3 are separated from each other in the vertical direction, the drive shaft elastic member 156 presses the upper mold drive shaft 56 against the upper mold drive device 15 in the direction along the vertical direction to join them. Make it a state. When the rotary drive source 51 is driven, the lower mold drive shaft 58 rotates to rotate the lower mold drive device 19, and the rotation is transmitted to the outer mold lower mold 30.

Further, the lower mold drive shaft 58 transmits the rotation to the upper mold drive shaft 56, and the upper mold drive device 15 transmits the rotation to the outer mold 20. When the upper mold 2 is pressed with respect to the lower mold 3 in the direction along the vertical direction, the upper mold drive shaft 56 and the upper mold drive device 15 are separated from each other in the direction along the vertical direction to release the bonded state. do.

<Detailed explanation of the common configuration of the rotary drive device 5>
Next, with reference to FIGS. 2 to 9, the configuration of the rotary drive device 5 common to the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment will be described in detail. .. As shown in FIGS. 7 and 8, the lower mold drive device 19 passively transmits the rotation of the rotary drive source 51 to the lower mold drive device 19 and the drive belt 52, and passively rotates the lower mold. It includes a rotary drive pulley 50 that rotates synchronously with the drive shaft 58, and a lower drive pulley 91 that rotates synchronously with the lower drive shaft 58. Further, a lower die drive belt 92 for transmitting the rotation of the lower die drive pulley 91 to the outer die lower die 30 is provided.

As shown in FIGS. 7 and 8, the upper mold drive device 15 holds an upper mold drive pulley 151 that rotates synchronously by engaging with the upper mold drive shaft 56, and an upper mold drive that holds the upper mold drive pulley 151. A pulley holding portion 154 is provided. Further, the upper die drive belt 152 for transmitting the rotation of the upper die drive pulley 151 to the outer die 20 is provided.

As shown in FIG. 6, the outer shape lower mold 30 includes an outer shape lower mold pulley 33 that drives the lower mold drive belt 92, and rotates integrally with the rotation of the outer shape lower mold pulley 33. As shown in FIGS. 4 and 5, the outer die 20 includes an outer die pulley 24 that drives the drive of the upper die drive belt 152, and rotates integrally with the rotation of the outer die pulley 24. ..

As shown in FIGS. 2 and 3, the upper mold drive pulley holding portion 154 is directly or indirectly connected to the upper mold 2 and moves as the upper mold 2 moves along the vertical direction. do. As shown in FIGS. 7 to 9 (FIG. 13), the upper die drive pulley 151 and the upper die drive shaft 56 are relatively movable in the direction along the vertical direction. As shown in FIGS. 7 and 9 (a) (FIG. 12 and 13 (a)), the drive shaft elastic member 156 is in a state where the upper mold 2 and the lower mold 3 are separated from each other in the vertical direction. The upper die drive shaft 56 is pressed against the upper die drive pulley 151 in a direction along the vertical direction to bring the upper die drive shaft 56 into a joined state.

As shown in FIGS. 7 and 8, when the rotary drive source 51 rotates, the drive belt 52 is driven to rotate the rotary drive pulley 50 to rotate the lower drive shaft 58, and the lower drive pulley 91 is rotated. .. The lower die drive pulley 91 transmits rotation to the outer die lower mold 30 via the lower die drive belt 92. The lower mold drive shaft 58 transmits the rotation to the upper mold drive shaft 56, and transmits the rotation to the outer mold 20 via the upper mold drive belt 152.

As shown in FIGS. 8 and 9 (b) (FIG. 12 and 13 (b)), when the upper mold 2 is pressed in the direction along the vertical direction with respect to the lower mold 3, the upper mold drive shaft 56 and the upper mold drive shaft 56 are pressed. It is separated from the upper type drive pulley 151 (252) in the direction along the vertical direction to release the joined state.

A timing belt is suitable for the drive belt 52, the upper drive belt 152, and the lower drive belt 92. As the rotary drive pulley 50, the upper drive pulley 151, and the lower drive pulley 91, a timing pulley corresponding to the timing belt to be used is suitable. In addition, the timing pulley corresponding to the timing belt to be used is suitable for the outer die pulley 24 of the outer die 20 and the outer die pulley 33 of the outer die 30. The configuration that differs depending on each embodiment will be described later.

<Explanation of balance correction unit 160>
Next, the configuration of the balance correction unit 160 will be described with reference to FIGS. 2 and 3 as examples. The outer die 20 and the outer die 30 are provided with a balance correction unit 160 at a position symmetrical to the rotation drive device 5 with respect to the first central axis C1. The balance correction unit 160 includes a balance correction table 161 on the lower mold 3, and a balance elastic member 164 or the like between the balance correction table 161 and the upper mold 2. The balance elastic member 164 and the like prevent the upper mold 2 from being tilted in the rotation drive device 5.

In the rotary drive device 5, when the drive shaft elastic member 156 starts to apply downward pressure to the upper drive shaft 56 in the vertical direction, or when the upper drive shaft 56 and the lower drive shaft 58 come into contact with each other. An eccentric load is generated when it begins to. As a result, the upper mold 2 may tilt. In order to prevent tilting due to an eccentric load, the balance correction unit 160 is provided with a balance elastic member 164 on the opposite side of the rotation drive device 5 with respect to the first central axis C1 to prevent tilting. It is something to do. A plurality of balance elastic members 164 may be provided. 2 and 3 show the laminated steel sheet manufacturing apparatus 100 of the first embodiment as an example, but detailed description including other embodiments will be described later.

<Problems solved by the rotary drive device common to each embodiment and their effects>
As described above, the rotary drive device 5 in the laminated steel sheet manufacturing apparatus 100 and the like solves various problems and is effective.

The first issue is as follows. In the laminated steel plate manufacturing apparatus 100 and the like, in order to punch out the outer shape of the steel plate 17, the outer die 20 moves with respect to the outer die 30 in the direction along the vertical direction, so that the rotary drive device 5 is the outer die. It is necessary to have a configuration corresponding to the movement of 20 and this is a problem to be solved. Further, if the outer shape of the steel plate 17 is punched and an error in the amount of rotation is accumulated every time the steel plate 17 is rotated by a predetermined angle θ, the positional deviation between the outer die 20 and the outer die 30 increases, which leads to damage to the device. There is. The laminated steel sheet manufacturing apparatus 100 and the like according to the first aspect of the present invention solve these problems.

As an example, as shown in FIGS. 7 to 9, in the laminated steel plate manufacturing apparatus 100 and the like, when the rotary drive source 51 is driven in a state where the upper mold 2 and the lower mold 3 are separated in the vertical direction, the lower mold 2 and the lower mold 3 are separated from each other. The mold drive device 19 is rotated to transmit the rotation to the outer mold 30. At the same time, the lower mold drive shaft 58 transmits the rotation to the upper mold drive shaft 56, and the upper mold drive device 15 transmits the rotation to the outer mold 20. Therefore, the outer die 20 and the outer die 30 can be rotated in synchronization with each other.

Further, when the upper mold 2 is pressed with respect to the lower mold 3 in the direction along the vertical direction, the upper mold drive shaft 56 and the upper mold drive device 15 are separated from each other in the direction along the vertical direction and are joined. To cancel. Therefore, each time the upper mold 2 is pressed, the phase difference between the upper mold driving device 15 and the lower mold driving device 19 is canceled, so that it is possible to eliminate the accumulation of errors.

Next, the second problem is to install the rotary drive device 5 such as the laminated steel sheet manufacturing device 100 without increasing the size of the entire device, and to have a configuration having a high degree of freedom in the arrangement position and the like. Further, in the rotary drive device 5 in which many components are movable, there is a possibility that the components may deteriorate or the frequency of failure may increase, so that it is necessary to improve maintainability. The laminated steel sheet manufacturing apparatus 100 and the like according to the first aspect of the present invention solve these problems.

As an example, as shown in FIGS. 7 to 9, the laminated steel sheet manufacturing apparatus 100 and the like have a configuration in which the outer die 20 and the outer die 30 are rotated by a combination of the drive belt 52 and the rotary drive pulley 50. Is. Therefore, the positional relationship between the rotation drive control device 54 and the outer die 20 and the outer die 30 can be easily set.

Further, the rotary drive device 5 is connected to the outer shape upper mold 20 by the upper mold drive belt 152, and is connected to the outer shape lower mold 30 by the lower mold drive belt 92. By removing the upper mold drive belt 152 and the lower mold drive belt 92, the rotary drive device 5 can be easily separated from the upper mold 2 and the lower mold 3. Therefore, the rotary drive device 5 such as the laminated steel sheet manufacturing device 100 is easy to maintain in case of failure or the like.

Further, when the rotary drive device 5 rotationally drives the outer die 20 and the outer die 30, the upper die drive shaft 56 and the upper die drive pulley 151 are in a joint state in the vertical direction. When the outer die 20 is pressed against the outer die 30, the joint state is released in the vertical direction and the die is separated. Therefore, the outer die 20 and the outer die 30 can be rotated in synchronization with each other. Further, since the phase difference between the upper mold driving device 15 and the lower mold driving device 19 is canceled each time the upper mold 2 is pressed, it is possible to eliminate the accumulation of errors.

Next, the third problem is that the rotary drive device 5 such as the laminated steel sheet manufacturing device 100 may generate an eccentric load and tilt the upper mold 2 in the following cases. When the drive shaft elastic member 156 starts to apply downward pressure to the upper drive shaft 56 in the vertical direction, or when the upper drive shaft 56 and the lower drive shaft 58 start to come into contact with each other. When the upper die 2 is tilted, there is a problem that the outer punch 21 and the outer die 31 are deviated from each other and buffered with each other to be damaged. The laminated steel sheet manufacturing apparatus 100 and the like according to the first aspect of the present invention solve these problems.

As shown in the examples of FIGS. 2 and 3, the balance correction unit 160 is provided on the opposite side of the rotation drive device 5 with the first central axis C1 interposed therebetween. Since the balance elastic member 164 prevents the rotation drive device 5 from being tilted, the upper mold 2 can move stably without being tilted or displaced with respect to the lower mold 3. Further, the life of the laminated steel sheet manufacturing apparatus 100 and the like can be extended.

<Explanation of configuration unique to each embodiment>
Next, in the present invention, the configuration peculiar to the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment will be described. The configuration of each embodiment is different between the rotation drive device 5 and the balance correction unit 160, and the other configurations are common. The configurations other than the parts described here are based on the common configurations already described.

<Structure explanation peculiar to the laminated steel sheet manufacturing apparatus 100 of the first embodiment>
The configuration peculiar to the laminated steel sheet manufacturing apparatus 100 of the first embodiment according to the first aspect of the present invention will be described. The part peculiar to the common configuration described above will be explained. The description of the common configuration is omitted. Hereinafter, the same applies to the laminated steel sheet manufacturing apparatus 200 of the second embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment.

First, the configuration of the rotary drive device 5 will be described with reference to FIGS. 2, 3, and 7 to 9. The drive shaft support base 53 is fixed to the lower mold holder 120 of the lower mold 3 and is separated from the upper mold 2. The drive shaft support 53 includes a ball retainer bearing as a bearing member 28 between the upper part and the lower part of the upper type drive shaft 56 and the upper part and the lower part of the lower type drive shaft 58, and the upper type drive shaft 56 and the lower part. The mold drive shaft 58 is rotatable.

As shown in FIG. 7, the upper drive shaft 56 is partially provided with a collar portion 60, and a plate 159 is provided on the upper side of the collar portion 60 via a thrust needle bearing 155, and the drive shaft support 53 and the plate 159 are provided. A compression coil spring as a drive shaft elastic member 156 is provided between the two. The drive shaft elastic member 156 always presses the upper drive shaft 56 downward in the vertical direction.

As shown in FIG. 9, the upper drive shaft 56 forms a conical tapered portion 57 on the lower side of the flange portion 60. The upper die drive pulley 151 is provided with a sleeve ring collet 153 on the inner peripheral portion, and has a tightening force on the tapered portion 57 of the upper die drive shaft 56. As shown in FIG. 9A, when the upper mold 2 is located at the top dead center, the elastic force of the sleeve ring collet 153 grips and tightens the upper mold drive shaft 56, and the upper mold drive shaft 56 is tightened. When is rotated, the rotation is transmitted to the upper die drive pulley 151. The elastic force due to the sleeve ring collet 153 increases as the upper mold 2 approaches the top dead center, and the upper mold drive shaft 56 is tightened. The elastic force of the sleeve ring collet 153 is such that when the upper drive shaft 56 rotates, a sufficient tightening force is generated so as not to cause slippage with the tapered portion 57.

As shown in FIG. 9B, when the upper mold 2 is at the bottom dead center, the upper mold drive pulley is held by more than the amount of movement of the upper mold drive shaft 56 downward in the direction along the vertical direction. The portion 154 moves downward together with the upper die drive pulley 151. When the upper mold 2 is at the bottom dead center, the taper portion 57 and the sleeve ring collet 153 are separated from each other and there is a gap 257, and even if the upper mold drive shaft 56 rotates, the upper mold drive pulley 151 rotates. Do not tell. In the upper die drive shaft 56, a portion other than the tapered portion 57 is provided with a ball retainer bearing as a bearing member 28 between the upper die drive pulley 151 and the inner circumference thereof. The upper die drive shaft 56 and the upper die drive pulley 151 are relatively rotatable in a state where the tapered portion 57 and the sleeve ring collet 153 are separated from each other.

The separation between the tapered portion 57 and the sleeve ring collet 153, which is shown in FIG. 9B, starts when the upper mold 2 moves downward in the direction along the vertical direction and positions the positioning pilot pin 25 in the positioning pilot hole. Immediately before insertion into 37 (see FIG. 4). The outer die 20 inserts the positioning pilot pin 25 into the positioning pilot hole 37 of the outer die 30 in a state where the upper die drive pulley 151 and the lower die drive pulley 91 are disconnected. Therefore, the rotation error that occurs between the upper die drive pulley 151 and the lower die drive pulley 91 is eliminated for each outer shape punching operation of the steel plate 17 by the outer shape upper die 20 and the outer shape lower die 30, so that the rotation error is eliminated. Does not accumulate. This principle is the same for the laminated steel sheet manufacturing apparatus 200 of the second embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment, which will be described later.

As shown in FIG. 9, the upper die drive pulley holding portion 154 penetrates the upper die drive shaft 56 and holds the upper die drive pulley 151. In the vertical direction, the upper drive pulley 151 is provided with a plate 159 on the lower side and a thrust needle bearing 155 between the plate 159 and the upper drive pulley holding portion 154. The upper drive pulley 151 is rotatable with respect to the upper drive pulley holding portion 154.

As shown in FIGS. 9A and 9B, the lower side of the upper drive shaft 56 in the vertical direction has a convex portion, and the upper side of the lower drive shaft 58 has a concave portion, which is convex with respect to the concave portion. The portion is movable between the movable spaces 59 in the direction along the vertical direction.

As shown in FIGS. 2 and 3, the upper die drive pulley holding portion 154 is connected to the first fixed punch plate 121 and the upper die sub-plate 122 in the upper die 2, and the upper die 2 is in the direction along the vertical direction. Move at the same time as moving to.

Next, the balance correction unit 160 in the laminated steel sheet manufacturing apparatus 100 will be described with reference to FIGS. 2 and 3. The balance correction unit 160 includes a balance correction table 161 fixed to the lower mold holder 120. As shown in FIG. 2 and the like, the balance correction table 161 partially forms a recess. The load balance table 163 coupled to the upper mold 2 receives a downward pressure from the balance elastic member 164 in the recess of the balance correction table 161. The balance elastic member 164 in the laminated steel sheet manufacturing apparatus 100 is, for example, a compression coil spring. As described above, when the eccentric load is generated and the upper mold 2 is tilted, the elastic force of the balance elastic member 164 corrects the tilt.

<Structure explanation peculiar to the laminated steel sheet manufacturing apparatus 200 of the second embodiment>
Next, with reference to FIGS. 10 and 11, the configuration of the laminated steel sheet manufacturing apparatus 200 of the second embodiment according to the first aspect of the present invention will be described. The difference from the laminated steel sheet manufacturing apparatus 100 is the configuration of the drive shaft elastic member 256 in the rotary drive device 5, the balance correction base 161 and the balance elastic member 164 in the balance correction unit 160.

As shown in FIG. 11, the drive shaft elastic member 256 is a gas spring 166 fixed to the drive shaft support base 53, unlike the drive shaft elastic member 156 in the laminated steel plate manufacturing apparatus 100. The gas spring 166 contains a high-pressure gas (nitrogen gas: nonflammable) in a sealed cylinder, and the reaction force of this gas is used as an elastic force. Although the gas spring 166 is small, a small spring constant can be obtained with a large initial load, so that it has a characteristic of giving a stable elastic force regardless of the stroke amount. Therefore, the pressure of the gas spring 166 used as the drive shaft elastic member 256 is more stable than that of the compression coil spring used in the laminated steel sheet manufacturing apparatus 100 of the first embodiment. That is, the pressure difference between when the upper mold 2 is at the top dead center and when it is at the bottom dead center is small.

The gas spring 166 as the drive shaft elastic member 256 sandwiches the plate 159 on the lower side in the vertical direction and presses the upper drive shaft 56 downward via the thrust needle bearing 155. The upper drive shaft 56 is rotatable with respect to the gas spring 166 by a thrust needle bearing 155. Since the upper end of the upper drive shaft 56 and the drive shaft support 53 are provided with a ball retainer bearing as a bearing member 28, the upper drive shaft 56 can also rotate with respect to the drive shaft support 53. be.

Next, the configuration of the balance correction unit 160 will be described with reference to FIG. The balance correction table 161 is the same as the laminated steel sheet manufacturing apparatus 100, and the balance elastic member 164 uses a gas spring 166 instead of the compression coil spring. The characteristics of the gas spring 166 are as described above. In addition to the gas spring 166 described above, a pneumatic open / close cylinder or a hydraulic open / close cylinder may be used.

<Structure explanation peculiar to the laminated steel sheet manufacturing apparatus 300 of the third embodiment>
Next, with reference to FIGS. 12 and 13, a configuration peculiar to the laminated steel sheet manufacturing apparatus 300 of the third embodiment according to the first aspect of the present invention will be described. The drive shaft support 53 includes an upper drive shaft support 253 and a lower drive shaft support 254. The lower drive shaft support base 254 is fixed to the lower mold holder 120 and supports the lower mold drive shaft 58 and a part of the upper mold drive shaft 56 on the lower side in the vertical direction. In the upper mold drive shaft support base 253, the upper side in the vertical direction is fixed to the upper mold 2, and the lower side is integrally coupled with the upper mold drive pulley holding portion 154. When the upper mold 2 moves in the direction along the vertical direction, the upper mold drive shaft support base 253 and the upper mold drive pulley holding portion 154 move at the same time.

As shown in FIG. 13, the rotary drive device 5 has a sleeve ring collet 153 attached to the outer periphery of the upper die drive shaft 56, and is joined to and separated from the inner peripheral portion of the upper die drive pulley 252. A release bushing 158 is provided under the sleeve ring collet 153. As shown in FIG. 13 (a), when the upper mold 2 is at the top dead center, the collet holder 157 is pushed down by the elastic force of the compression coil spring as the drive shaft elastic member 156, and the sleeve ring collet 153 is subjected to the elastic force. It is joined to the upper type drive pulley 252. As a result, the sleeve ring collet 153 makes the upper mold drive shaft 56 and the upper mold drive pulley 151 rotatable integrally. The elastic force of the sleeve ring collet 153 is such that when the upper type drive shaft 56 rotates, a sufficient tightening force is generated so as not to cause slippage with the upper type drive pulley 252.

As shown in FIG. 13B, when the upper mold 2 is at the bottom dead center, the upper mold drive pulley is held by more than the amount of movement of the upper mold drive shaft 56 downward in the direction along the vertical direction. The portion 154 moves downward together with the upper die drive pulley 151. At this time, the inner peripheral portion of the upper die drive pulley 252 and the sleeve ring collet 153 are separated from each other to form a gap 257, and the upper die drive shaft 56 does not transmit rotation to the upper die drive pulley 151. Similar to the laminated steel sheet manufacturing devices 100 and 200, the rotation error that occurs between the upper die drive pulley 151 and the lower die drive pulley 91 is the outer shape punching operation of the steel sheet 17 by the outer shape upper die 20 and the outer shape lower die 30. Since it is eliminated every time, rotation error is not accumulated.

Next, the configuration of the balance correction unit 160 will be described. As shown in FIG. 12, the balance correction unit 160 includes a balance correction table 168 (161) fixed to the lower mold 3 and a compression coil spring 165 as a balance elastic member 164. Further, an upper balance support base 167 for accommodating the balance elastic member 164 and the balance support rod 162 and fixing them to the upper mold 2 is provided. With the above configuration, the balance correction unit 160 corrects the inclination by the elastic force of the balance elastic member 164 when the eccentric load is generated and the upper mold 2 is tilted.

<Structure explanation peculiar to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment>
Next, with reference to FIGS. 14 and 15, the configuration of the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment according to the first aspect of the present invention will be described. In the laminated steel sheet manufacturing apparatus 400, the drive shaft elastic member 256 in the rotary drive device 5 and the balance elastic member 164 in the balance correction unit 160 are different from the laminated steel sheet manufacturing apparatus 300.

The drive shaft elastic member 256 uses a gas spring 166 as an example, as in the laminated steel sheet manufacturing apparatus 200. As shown in FIG. 15, the gas spring 166 as the drive shaft elastic member 256 is in a state of being fixed to the upper mold 2. The upper mold drive shaft support base 253 is fixed to the lower side of the upper mold 2 in the vertical direction, and the upper mold drive pulley holding portion 154 is fixed to the lower side of the upper mold drive shaft support base 253. ..

The upper side of the collet holder 157 is provided with a thrust needle bearing 155, and the upper side is in contact with the guide pin 271 via the plate 159. The guide pin 271 is composed of a plurality of guide pins, and is in contact with the contact end portion of the gas spring 166 as the drive shaft elastic member 256 via the plate 270. The lower side of the collet holder 157 has the same configuration as the rotary drive device 5 in the laminated steel sheet manufacturing apparatus 200. The gas spring 166 applies pressure downward in the direction along the vertical direction to press the upper mold drive device 15 downward.

<Structure explanation peculiar to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment>
Next, with reference to FIGS. 16 and 17, the configuration of the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment according to the first aspect of the present invention will be described. In the laminated steel sheet manufacturing apparatus 500, unlike the laminated steel sheet manufacturing apparatus 100 and the like described above, the outer die 20 does not have a structure that rotates around the first central axis C1, and only the outer die 30 is the lower die. It is a configuration that can be rotated with respect to the mold 3.

The upper mold 2 partially constitutes the outer mold 20, and when the upper mold 2 moves in the vertical direction, the outer mold 20 also moves at the same time. Since the lower mold 3 and the outer shape lower mold 30 have the same configuration as the laminated steel sheet manufacturing apparatus 100 and the like, the description thereof will be omitted. As will be described later, the laminated steel sheet manufacturing apparatus 500 includes a cooling device 6 and a steel sheet aligned heating device 9 in the lower die 3 in the same manner as the laminated steel sheet manufacturing apparatus 100 and the like. Further, the adhesive coating device 4 may be configured in the outer mold 20 in the same manner as the laminated steel sheet manufacturing device 100 and the like. Alternatively, as shown in FIG. 16, the adhesive coating device 520 (4) may be configured at a position other than the outer die 20 in the upper die 2, or the outer die in the lower die 3. It may be configured at a position other than the mold 30. The detailed configurations of the adhesive coating device 4, the steel sheet alignment heating device 9, and the cooling device 6 will be described later.

With reference to FIG. 17, the configuration of the rotary drive device 510 corresponding to the rotary drive device 5 in the laminated steel sheet manufacturing apparatus 100 and the like will be described. The rotation drive device 510 has the same configuration as the lower mold drive device 19 among the rotation drive devices 5. The difference is that the drive support base 511 is fixed to the lower mold holder 120 to support the rotary drive shaft 512.

<Structure explanation peculiar to the laminated steel sheet manufacturing apparatus 600 of the sixth embodiment>
Next, although not shown, the configuration of the laminated steel sheet manufacturing apparatus 600 of the sixth embodiment according to the first aspect of the present invention will be described. The laminated steel sheet manufacturing apparatus 600 is different from the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment, and the outer die 20 and the outer die 30 are the first central axis C1. Has no rotatable configuration around. The laminated steel sheet manufacturing apparatus 600 may include a cooling device 6 described later, and may further include an adhesive coating device 4. When the adhesive coating device 4 is provided, the steel sheet alignment heating device 9 described later may be provided. Further, the adhesive coating device 4 described later has a configuration in which the adhesive 45 is applied from the nozzle ejection portion 140, but the steel plates 17 are laminated by caulking without using the adhesive 45 to manufacture the laminated steel plate 14. But it may be.

<Overview of the configuration of the adhesive coating device 4>
Next, the configuration of the adhesive coating device 4 common to all embodiments will be described with reference to FIGS. 4, 5, 16, and 18 to 23, unless otherwise specified. As shown in FIGS. 4, 5, and 16, the laminated steel sheet manufacturing apparatus 100 and the like have an adhesive 45 on a steel plate 17 including a steel plate material 16 in at least one of the upper mold 2 and the lower mold 3. The adhesive coating device 4 (520) for coating the adhesive and the operating member 210 (2, 513) for operating the adhesive coating device 4 are provided.

As shown in FIGS. 4, 5, 18, and 19, the adhesive application device 4 includes a nozzle unit 40 for discharging the adhesive 45, an adhesive storage unit 46 for storing the adhesive 45, and an adhesive. A supply pipe 47 for supplying the adhesive 45 from the storage unit 46 to the nozzle unit 40 is provided. The side of the adhesive storage portion 46 is the upstream side, and the side of the nozzle unit 40 is the downstream side. The nozzle unit 40 is inside the nozzle 41 that forms the nozzle discharge portion 140 that discharges the adhesive 45 to the steel plate 17, and is for selectively supplying the adhesive 45 from the upstream side to the downstream side. A nozzle on-off valve 42 is provided. Further, a nozzle holder 43 that supports the nozzle 41 so as to be movable in the direction along the vertical direction is provided.

The nozzle unit 40 can form a first state in which the nozzle 41 is located relatively downstream of the nozzle holder 43 by the operating member 210 (2) or the like. Further, it is possible to form a second state in which the nozzle 41 is located relatively upstream of the nozzle holder 43.

In the nozzle 41, when the actuating member 210 (2) is actuated in one direction, the nozzle 41 is located on the downstream side of the nozzle holder 43 in the first state, and the nozzle ejection portion 140 is a steel plate 17 including the steel plate material 16. Contact. Further, when the operating member 210 (2) operates in one direction, the nozzle 41 moves in a direction relatively along the vertical direction with respect to the nozzle holder 43 to form a second state, and the nozzle on-off valve 42 opens. , A flow path of the adhesive 45 is formed inside the nozzle unit 40.

When the actuating member 210 operates on the other side, the nozzle 41 moves relatively downstream with respect to the nozzle holder 43 to form the first state. Then, the nozzle on-off valve 42 closes, blocking the flow path of the adhesive 45 inside the nozzle unit 40.

Next, among the configurations of the adhesive coating device 4, the points that differ depending on the embodiment will be described. In the case of the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment, the operating member 210 corresponds to the upper mold 2. The nozzle unit 40 moves in the same direction as the upper mold 2 moves in the vertical direction, so that the nozzle 41 is in the first state relatively downstream of the nozzle holder 43. It can be formed. Further, it is possible to form a second state in which the nozzle 41 is located relatively upstream of the nozzle holder 43.

When the upper mold 2 moves downward in the direction along the vertical direction of the nozzle 41, the nozzle ejection portion 140 comes into contact with the steel plate 17 including the steel plate material 16. This state is the first state. Further, when the upper mold 2 moves downward in the direction relatively along the vertical direction, the nozzle 41 moves relatively upstream with respect to the nozzle holder 43 to form a second state.

Further, in the case of the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment, as shown in FIG. 16, the operating member 210 is an operating slide cam 513. The actuating slide cam 513 partially has a vertical inclination with respect to the vertical direction, and moves in the horizontal direction (between the front side and the rear side on the paper surface) to move the nozzle 41 in the vertical direction. Move to.

Next, the operating member 210 will be described. As shown in FIG. 16 and the like, when the adhesive application device 520 (4) is in the upper mold 2, the operating member 210 moves in the direction along the upper mold 2 or the horizontal direction provided in the upper mold 2. A possible actuation slide cam 513. As shown in FIG. 16, when the adhesive application device 520 (4) is in the lower mold 3, the operating member 210 is an operating slide cam 513 provided in the lower mold 3 and movable in the horizontal direction. ..

When the adhesive coating device 4 is in the upper mold 2 and the operating member 210 is the upper mold 2, the adhesive coating device 4 is the first as the upper mold 2 moves in the vertical direction. It forms one state and a second state. When the actuating member 210 is the actuating slide cam 513, the actuating slide cam 513 is moved in the direction along the horizontal direction to form the first state and the second state.

<Structure explanation of nozzle on-off valve 42>
Next, the configuration of the nozzle on-off valve 42 will be described in detail with reference to FIGS. 18 and 19. The nozzle on-off valve 42 includes a first nozzle on-off valve 142, a first nozzle valve elastic member 143, a second nozzle on-off valve 144, a second nozzle valve elastic member 145, and a third nozzle on-off valve 146. The nozzle holder 43 forms a first adhesive flow path 148 extending in the vertical direction inside. The nozzle 41 forms a second adhesive flow path 147 extending in the vertical direction and a third adhesive flow path 150 connected to the nozzle discharge portion 140.

As shown in FIG. 18, in the first state, the first nozzle on-off valve 142 contacts the nozzle holder 43 by the elastic force of the first nozzle valve elastic member 143 and closes the first adhesive flow path 148. The second nozzle on-off valve 144 closes the second adhesive flow path 147 by the elastic force of the second nozzle valve elastic member 145. The third nozzle on-off valve 146 closes the third adhesive flow path 150 in a closed state.

As shown in FIG. 19, in the second state, the nozzle 41 is in a state of moving relatively upstream with respect to the first nozzle on-off valve 142 against the elastic force of the first nozzle valve elastic member 143. The nozzle holder 43 creates a gap between the nozzle holder 43 and the first nozzle on-off valve 142 to open the first adhesive flow path 148. The adhesive 45 flows from the first nozzle flow path 281 to the second nozzle flow path 282, and further flows into the second adhesive flow path 147. The second nozzle on-off valve 144 moves relatively downstream with respect to the nozzle 41 due to the pressure of the adhesive 45 flowing into the second adhesive flow path 147 to open the second adhesive flow path 147. Further, the pressure of the adhesive 45 pushes the third nozzle on-off valve 146 to open the third adhesive flow path 150, and the adhesive 45 is supplied to the nozzle discharge portion 140.

<Detailed explanation of the nozzle on-off valve 42 and related elements>
Next, the nozzle on-off valve 42 and related elements will be described in more detail with reference to FIGS. 18 and 19. The nozzle holder 43 has a first nozzle holder 240 and a second nozzle holder 242 arranged in this order from the upstream side, and operates integrally by fastening bolts. As shown in FIG. 5 and the like, the end portion of the first nozzle holder 240 is the nozzle engaging portion 241. When the adhesive application device 4 is in the upper mold 2, it comes into contact with the nozzle cam engaging surface 244 or the nozzle cam recess 245 of the nozzle slide cam 49 of the upper mold 2. As shown in FIG. 16, when the adhesive application device 4 is in the lower mold 3, it comes into contact with a part of the lower mold 3 (not shown).

As shown in FIG. 5, the adhesive application device 4 supplies the adhesive 45 from the adhesive storage unit 46 through the supply pipe 47. The supply pipe 47 is connected to the first nozzle holder 240. When the adhesive coating device 4 is inside the mold 20 in appearance, the supply pipe 47 is connected to the rotary joint 48 and further connected to the first nozzle holder 240. As shown in FIGS. 18 and 19, the first nozzle holder 240 forms a first nozzle flow path 281 extending in the vertical direction inside, and the second nozzle holder 242 is a second connected to the first nozzle flow path 281. The nozzle flow path 282 is formed. As an example, in the example shown in FIG. 18 and the like, a case where the nozzle 41 and the like are two is shown, and the second nozzle flow path 282 branches in two directions. A larger number of nozzles 41 and the like may be provided, in which case the second nozzle flow path 282 branches in more directions.

As shown in FIGS. 18 and 19, the second nozzle holder 242 includes a nozzle guide portion 283 connected to the second nozzle flow path 282. The second nozzle flow path 282 and the nozzle guide portion 283 are connected by a step portion 175, and the nozzle guide portion 283 has a narrower flow path than the second nozzle flow path 282. The nozzle 41 is in a state of being inserted into the second nozzle flow path 282 and the nozzle guide portion 283, and can move in the direction along the vertical direction. The nozzle 41 is provided with O-rings 243 at a plurality of locations on a part of the outer peripheral portion to prevent the adhesive 45 from leaking from the gap between the second nozzle holder 242 and the nozzle 41.

As shown in FIGS. 18 and 19, the end of the nozzle 41 on the side of the second nozzle flow path 282 includes a first nozzle on-off valve 142. The first nozzle on-off valve 142 forms a receiving portion 171 of the first nozzle valve elastic member 143 whose one end is, for example, a compression coil spring, and has a tapered flange portion 172 in a part thereof, and the other end. The portion is a cylindrical portion 173 that fits into the step portion 175 of the nozzle holder 43. As shown in FIG. 18, in the first state, the collar portion 172 comes into contact with a part of the step portion 175 of the nozzle holder 43, and the cylindrical portion 173 fits into the step portion 175 to close the first adhesive flow path 148. .. As shown in FIG. 19, in the second state, the collar portion 172 is separated from the step portion 175, a gap is generated between the cylindrical portion 173 and the step portion 175, and the first adhesive flow path 148 is opened.

As shown in FIG. 20, the second nozzle on-off valve 144 is a spherical member, and the second nozzle valve elastic member 145 is a compression coil spring. One of the second nozzle valve elastic members 145 elastically supports the second nozzle on-off valve 144.

Next, the configuration of the third nozzle on-off valve 146 will be described in more detail with reference to FIGS. 18 to 20. The third nozzle on-off valve 146 is made of a thin film member having an elastic force, is located at a portion corresponding to the position of the center of the third adhesive flow path 150, and is horizontal in the third adhesive flow path 150 when opened. It is provided with an on-off valve hole 135 that is smaller than the width in the direction.

As shown in FIG. 18, the on-off valve hole 135 is closed in the first state in which the pressure from the adhesive 45 is not received, and the second adhesive flow path 147 to the third adhesive flow path. Stops the adhesive 45 from flowing to 150. As shown in FIG. 19, the on-off valve hole 135 is in an open state in the second state in which the pressure from the adhesive 45 is applied, and the second adhesive flow path 147 to the third adhesive flow path 150. Adhesive 45 flows to.

The third nozzle on-off valve 146 is, for example, a very thin material having elastic force such as fluorine rubber and silicon rubber. Fluororubber is a rubber with excellent heat resistance, oil resistance, and chemical resistance. More preferably, the on-off valve hole 135 is a very fine hole in the center of the third nozzle on-off valve 146 and has elasticity. The ultrafine hole means a hole having a diameter of 10 to 30 μm. When the pressure of the adhesive 45 is not applied to the on-off valve hole 135, the fluorine rubber is in a shrunk state and the hole is closed. On the contrary, when the pressure of the adhesive 45 is applied to the third nozzle on-off valve 146, the fluorine rubber is stretched to open the on-off valve hole 135, and the adhesive 45 is discharged from the nozzle ejection portion 140. That is, since the third nozzle on-off valve 146 is made of a thin film having elasticity, it can be opened and closed by the pressure of the adhesive 45.

In the first nozzle holder 240, the second nozzle holder 242, the nozzle 41, and the second nozzle on-off valve 144 described above, in order to prevent the adhesive 45 from solidifying, resins such as POM, PE, PP, and further fluorine. It may be coated with a resin.

<Structure explanation when the adhesive coating device 4 is inside the mold 20 in appearance>
Next, with reference to FIG. 4 and the like, the configuration when the adhesive coating device 4 is inside the mold 20 on the outer shape will be described. The nozzle unit 40 of the adhesive application device 4 is inside the outer mold 20 and can rotate around the first central axis C1 in synchronization with the outer mold 20. Moreover, it is movable in the vertical direction via the nozzle elastic member 44 between the outer shape and the mold 20.

The adhesive coating device 4 moves in conjunction with the movement of the mold 20 in the outer shape in the direction along the vertical direction. As shown in FIG. 19, when the outer mold 20 moves downward in the direction along the vertical direction and the lower end surface 225 comes into contact with the steel plate 17 including the steel plate material 16, the outer mold 20 and the nozzle unit There is a nozzle gap 255 in the vertical direction between the 40s. The nozzle unit 40 is rotatably connected to the supply pipe 47 via the rotary joint 48 directly or indirectly. It should be noted that this configuration is applied to the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment.

<Structure explanation of the device for detecting the rotation failure of the outer mold 11>
Next, with reference to FIGS. 21 and 22, a configuration for detecting a rotation defect between the outer die 20 and the outer die 30 and the behavior of the nozzle unit 40 in the adhesive 45 at that time will be described. do. The configuration described below is a configuration applied to the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment.

As shown in FIG. 21, in the laminated steel sheet manufacturing apparatus 100 and the like, the upper mold 2 rotatably supports the upper mold 20 on the outer shape of the first fixed punch plate 121 and the first fixed punch plate 121 in the vertical direction. It is movable in the direction along the above and includes a rotation defect detection pin 123 having a cam portion 221. Further, when the detection pin elastic member 125 that presses the rotation failure detection pin 123 in the direction along the vertical direction and the rotation failure detection pin 123 move relatively upward, they come into contact with the cam portion 221 and are in the direction along the horizontal direction. It is provided with a slide cam 124 for punching which can be moved to. The detection pin elastic member 125 is provided in the upper mold holder 126 that supports the upper mold 2.

Further, the positioning pilot pin 25 described above is usually inserted into the positioning pilot hole 37 of the outer die 30. However, when there is a rotation defect between the outer shape upper mold 20 and the outer shape lower mold 30, the tip of the positioning pilot pin 25 comes into contact with the upper end surface 247 of the outer shape lower mold 30. At this time, the compression coil spring, which is the elastic member 26 of the pilot pin, is compressed and deformed to release the positioning pilot pin 25 upward.

The punch slide cam 124 has a punch cam recess 223 on the lower side in the vertical direction, and the outer die 20 has an outer punch convex portion 228 protruding upward in the vertical direction. The outer shape lower mold 30 includes a rotation defect detection hole 39 into which a rotation defect detection pin 123 can be inserted. When a rotation failure occurs between the outer die 20 and the outer die 30, the result is as follows. The upper mold 2 moves downward in the direction along the vertical direction, and the upper mold 2 moves downward along the vertical direction at a position where the tip 222 of the rotation failure detection pin 123 is different from the position of the rotation failure detection hole 39. Move to the side.

When the upper die 2 moves downward in the direction along the vertical direction, the punch slide cam 124 is used until the tip 222 of the rotation failure detection pin 123 comes into contact with the upper end surface 247 of the outer die 30. Engages with the cam portion 221 of the rotation defect detection pin 123 and moves along the horizontal direction. The outer punch convex portion 228 of the outer die 20 penetrates into the punch cam recess 223 and moves upward in the vertical direction. The outer mold 20 stops moving in a state where the lower end surface 225 of the outer mold 20 and the upper end surface 247 of the outer lower mold 30 are separated from each other. Further, the nozzle ejection portion 140 of the nozzle unit 40 is in contact with the steel plate 17 including the steel plate material 16.

Further, when the upper mold 2 changes the moving direction to the upper side in the direction along the vertical direction, the outer mold 20 moves to the upper side. As shown in FIG. 22, in the nozzle unit 40, the nozzle ejection portion 140 is a steel plate 17 including the steel plate material 16 until the nozzle gap 255 (see FIG. 19) between the external mold 20 and the nozzle unit 40 disappears. Keep in contact with.

<Structure explanation for stopping the application of the adhesive 45>
Next, with reference to FIG. 23, the configuration for the adhesive application device 4 to stop the application of the adhesive 45 will be described. The adhesive coating device 4 includes a nozzle elastic member 44 between the upper mold 2 or the lower mold 3 in which the adhesive coating device 4 is installed and the nozzle unit 40 among the molds 10 in the vertical direction. The upper mold 2 or the lower mold 3 on which the adhesive application device 4 is installed includes a nozzle slide cam 49 that is movable in the horizontal direction and has a nozzle cam recess 245 on the lower side in the vertical direction.

The nozzle slide cam 49 has a nozzle cam engaging surface 244 forming a nozzle cam recess 245 in a part thereof, and the nozzle unit 40 includes a nozzle engaging portion 241 that engages with the nozzle slide cam 49. When the upper mold 2 moves downward in the direction along the vertical direction, the nozzle engaging portion 241 and the nozzle cam engaging surface 244 other than the nozzle cam recess 245 are engaged, and the nozzle ejection portion 140 includes the steel plate material 16. A state close to the steel plate 17. Further, it is possible to select a state in which the nozzle engaging portion 241 and the nozzle cam recess 245 are engaged and the nozzle discharging portion 140 is separated from the steel plate 17 including the steel plate material 16. In the state where the nozzle discharge portion 140 is separated from the steel plate 17 including the steel plate material 16, the nozzle unit 40 is on the upper side in the vertical direction only by the nozzle cam recess 245 as compared with the case where the nozzle discharge portion 140 is close to the steel plate 17 and the like. A gap 149 is formed between the nozzle ejection portion 140 and the lower end surface 225 of the outer punch 21.

<Solving problems and effects in the adhesive coating device 4>
As described above, the adhesive coating device 4 in the laminated steel sheet manufacturing device 100 and the like solves various problems and is effective. In the conventional adhesive application device, the adhesive is always supplied from the adhesive discharge portion at a predetermined pressure. When the adhesive application device comes into contact with a steel plate or the like, the adhesive is applied. That is, when the upper mold descends and comes into contact with a steel plate or the like, the adhesive is applied. Therefore, the conventional adhesive application device cannot control the application of a fixed amount of adhesive, and has a problem that the adhesive continues to overflow on the adhesive discharge portion, the steel plate, or the like, and the contamination by the adhesive spreads. On the other hand, the first problem to be solved is that the adhesive coating device 4 applies the adhesive 45 in accordance with the operation of the upper mold 2 moving with respect to the lower mold 3. Further, it is controlled to apply a fixed amount of the adhesive 45 to the steel plate 17 and the like. According to the operation of the upper mold 2, it is required to control the timing of separating the state in which the adhesive 45 is applied and the state in which the adhesive 45 is not applied, and control the amount of the adhesive 45 applied.

To solve this problem, the adhesive coating device 4 can form a first state in which the nozzle unit 40 blocks the flow path of the adhesive 45 and a second state in which the flow path of the adhesive 45 is opened. Since the adhesive application device 4 can form a state in which the adhesive 45 is applied to the steel plate 17 or the like and a state in which the discharge of the adhesive 45 is stopped, the timing and the application amount of the adhesive 45 can be determined. It is controllable and can be applied quantitatively.

As shown in FIG. 18, in the first state, the nozzle 41 is located on the downstream side of the nozzle holder 43, so that the nozzle on-off valve 42 is closed and the adhesive 45 is discharged from the nozzle discharge portion 140. Do not discharge. Therefore, it is possible to prevent the adhesive 45 from being ejected in a state where the steel plate 17 is not intended to be adhered or at an unintended timing. As shown in FIG. 19, in the second state, the nozzle opening / closing valve 42 is opened because the nozzle 41 is located relatively upstream of the nozzle holder 43. The adhesive application device 4 can quantitatively apply the adhesive 45 to the steel sheet 17 or the like by maintaining the second state for a predetermined time according to the amount of the adhesive 45 to be applied. The laminated steel plate 14 can be formed by applying the adhesive 45 to the steel plate 17 or the like at the timing when the steel plate 17 or the like should be bonded.

Further, the adhesive coating device 4 may be provided at the upper mold 2 or the lower mold 3 depending on the configuration of the laminated steel sheet manufacturing device 100 or the like. The second problem is that it is necessary to have a configuration that satisfies the function of applying the adhesive 45 regardless of the position of the adhesive application device 4. To solve this problem, the adhesive coating device 4 is provided with an actuating member 210 corresponding to each of the case where the upper mold 2 is located and the case where the lower mold 3 is located. It is possible to form a second state. Therefore, the adhesive coating device 4 can manufacture the laminated steel plate 14 by applying the adhesive 45 to the steel plate 17 including the steel plate material 16 regardless of whether it is installed in the upper mold 2 or the lower mold 3. ..

Further, the adhesive coating device 4 needs to apply the adhesive 45 to the steel plate 17 or the like following the movement of the upper mold 2 with respect to the lower mold 3. The third problem is that the nozzle on-off valve 42 needs to open and close with the movement of the upper mold 2 at that time. The configuration of the nozzle on-off valve 42 of the adhesive application device 4 solves this problem.

As shown in FIGS. 18 and 19, the nozzle holder 43 forms the first adhesive flow path 148, and the nozzle 41 has the second adhesive flow path 147 and the third adhesive flow connected to the nozzle discharge portion 140. Form the road 150. The nozzle on-off valve 42 includes a first nozzle on-off valve 142, a first nozzle valve elastic member 143, a second nozzle on-off valve 144, a second nozzle valve elastic member 145, and a third nozzle on-off valve 146. Since the first state and the second state are formed by the action of the above configuration, it is possible to more reliably form the state in which the adhesive 45 is applied and the state in which the discharge of the adhesive 45 is stopped.

The nozzle on-off valve 42 has a configuration in which three on-off valves open and close in a chain reaction as the nozzle 41 and the nozzle holder 43 move relative to each other in the direction along the vertical direction. When shifting from the first state to the second state, the first nozzle on-off valve 142 opens, the adhesive 45 flows into the first adhesive flow path 148, and the ball-shaped second nozzle on-off valve 144 is ejected from the nozzle discharge portion 140. Extrude to the side of. Then, the pressure of the adhesive 45 opens the third nozzle on-off valve 146, and the adhesive 45 is discharged from the nozzle ejection portion 140. Therefore, since the adhesive 45 flows stepwise from the upstream side to the downstream side, it is possible to prevent the adhesive 45 from flowing out all at once and causing an accident. Further, in the first state, all three on-off valves are closed, so that the adhesive 45 is prevented from flowing out.

Further, as shown in FIG. 20 and the like, the third nozzle on-off valve 146 is made of a thin film member having an elastic force, is located at a portion corresponding to the center position of the third adhesive flow path 150, and is opened. Is provided with an on-off valve hole 135 that is smaller than the horizontal width of the third adhesive flow path 150. Since the third nozzle on-off valve 146 is made of a thin film having elasticity, it can be opened and closed by the pressure of the adhesive 45. Therefore, it is possible to more reliably form a state in which the adhesive 45 is applied and a state in which the ejection of the adhesive 45 is stopped. The on-off valve hole 135 is preferably an extremely fine hole. In that case, the third nozzle on-off valve 146 can more reliably stop the adhesive 45 from flowing from the second adhesive flow path 147 to the third adhesive flow path 150 in the first state. Further, since the on-off valve hole 135 becomes an extremely fine hole in the second state, the adhesive 45 stably changes from the second adhesive flow path 147 to the third adhesive flow path according to the size of the on-off valve hole 135. The adhesive 45 can be flowed to 150.

Further, the adhesive coating device 4 rotates by a predetermined angle θ every time the outer die 20 punches out one outer shape of the steel plate 17 or every time a predetermined number of sheets are punched out. The fourth problem is that, in that case, if the coating position of the adhesive 45 changes due to the rotation of the steel sheet 17, the adhesive performance may deteriorate. To solve this problem, the nozzle unit 40 is inside the external mold 20 and can rotate around the first central axis C1 in synchronization with the external mold 20. Therefore, when the outer shape of the steel plate 17 is punched out, the coating position of the adhesive 45 relative to the outer shape of the steel plate 17 can be made constant.

The fifth issue is as follows. In the laminated steel plate manufacturing apparatus 100 to the laminated steel plate manufacturing apparatus 400, when the outer die 20 and the outer die 30 are rotated by a predetermined angle by a predetermined angle, the positions do not match each other, that is, when a rotation defect occurs, the outer shape is formed. The mold 11 and even the entire mold 10 may be damaged. There is a problem that this rotation defect is detected and the mold 10 or the like is prevented from being damaged. Further, since the adhesive coating device 4 is located inside the outer die 20, when a rotation failure occurs between the outer die 20 and the outer die 30, it is said that interlocking defects are prevented from occurring. There are challenges. The laminated steel sheet manufacturing apparatus 100 and the like according to the first aspect of the present invention solves this problem.

As shown in FIG. 21, when the upper mold 2 moves downward along the vertical direction in a state where the position of the tip portion 222 of the rotation failure detection pin 123 does not match the position of the rotation failure detection hole 39, the outer shape thereof The punch convex portion 228 penetrates into the punch cam concave portion 223. In the outer die 20, only the amount of the dent of the punch cam recess 223 is moved upward in the vertical direction, so that even if the upper die 2 moves toward the lower die 3, the outer die 20 remains. It does not reach the position of the steel plate material 16. Therefore, when the outer die 20 is not in the correct position with respect to the outer die 30, the punching of the steel plate 17 is stopped, so that the outer die 20 and the outer die 30 can be prevented from being damaged. can.

Further, even if the outer die 11 has a rotation defect, the upper die 2 moves downward in the direction along the vertical direction as an operation of punching the steel plate 17, and then moves upward as a return operation. .. As shown in FIG. 22, when the upper die 2 moves upward in the direction along the vertical direction, the outer punch 21 in the outer die 20 moves upward at the same time. The nozzle unit 40 maintains a state in which the nozzle ejection portion 140 is in contact with the steel plate 17 while the nozzle gap 255 (see FIG. 19) is present when the outer punch 21 of the outer die 20 is raised. That is, the nozzle unit 40 behaves independently of the behavior of the upper mold 2 and the outer mold 20 for a certain period of time. Therefore, even if the outer die 11 has a rotation defect, the nozzle unit 40 in the adhesive coating device 4 has an effect that the interlocking defect does not occur.

The sixth problem is that the adhesive coating device 4 stops the application of the adhesive 45 according to the number of laminated steel sheets 17 in the laminated steel sheet 14 to be manufactured. The laminated steel plate 14 is formed by adhering a certain number of steel plates 17 to each other. This is because the laminated steel sheet manufacturing apparatus 100 and the like continuously punch out the steel sheet 17 from the steel sheet material 16, so that if the adhesive 45 is applied every time the steel sheet 17 is punched out, the bonding process cannot be stopped when a certain number of sheets are laminated.

As shown in FIGS. 5 and 21, this problem is solved as follows. In the adhesive coating device 4, when the upper die 2 moves downward in the vertical direction and the steel plate 17 is punched out by the outer die 20 and the outer die 30, the nozzle engaging portion 241 engages with the nozzle cam. The position of the nozzle ejection portion 140 can be selected depending on whether it engages with the surface 244 or the nozzle cam recess 245. Therefore, when the upper die 2 moves downward in the vertical direction and punches out the outer shape of the steel plate 17, it is possible to select whether to apply the adhesive 45 to the steel plate 17 or to stop the coating.

<Explanation of the schematic configuration of the steel sheet alignment heating device 9>
Next, with reference to FIG. 27, the configuration of the steel sheet alignment heating device 9 common to all the embodiments will be described. The adhesive 45 is thermosetting. The outer shape lower die 30 includes a steel plate guide path 36 extending downward in a direction along the vertical direction with the first central axis C1 as the center. The steel plate guide path 36 guides the steel plate 17 punched out by the outer die 20 and the outer die 30 to the lower side in the vertical direction. Further, the outer shape lower mold 30 forms a part of the steel plate guide path 36, and is provided with a steel plate alignment heating device 9 for heating the steel plate 17 below the outer shape lower mold 30 in the vertical direction.

At least a part of the steel sheet alignment heating device 9 contacts and heats the steel sheet 17, and aligns the steel sheet 17 in the stacking direction on the steel sheet guide path 36. The adhesive 45 applied to the steel sheet 17 by the adhesive coating device 4 is cured by heating of the steel sheet alignment heating device 9 and adheres to each other with the steel sheets 17 adjacent in the vertical direction in the vertical direction to form the laminated steel sheet 14.

<Structure explanation of heating unit 7>
Next, the configuration of the heating unit 7 in the steel sheet aligned heating device 9 will be described with reference to FIGS. 24 and 27. The steel sheet alignment heating device 9 includes a heating unit 7 for heating the steel plate 17 or the laminated steel plate 14. The heating unit 7 is arranged so as to surround the steel plate guide path 36 in a direction intersecting the steel plate guide path 36, and has a plurality of heating movable portions 72 that can move toward the first central axis C1 and a heating movable portion. A heating unit 74 for heating 72 is provided. Further, the heating unit 7 includes a movable elastic member 73 that moves the heating movable portion 72 in a direction intersecting the first central axis C1, and a heating movable portion holder 71 that guides the movement of the heating movable portion 72. In the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment, the heated movable portion holder 71 is rotatable around the first central axis C1 together with the heated movable portion 72.

The heated movable portion holder 71 is separated from the outer die 30 in the vertical direction, and the heated movable portion 72 is in pressure contact with the outer peripheral portion of the steel plate 17 from a plurality of directions by the elastic force of the movable elastic member 73. The steel plate 17 is further aligned with respect to the steel plate guide path 36.

More specifically, as shown in FIG. 27, the heating portion 74 is fixed to the sub die plate 133 of the lower mold 3 via the heat insulating material 75. In the example shown in FIG. 24, the heating unit 74 is a plate-shaped heater arranged at four locations around the heating movable unit holder 71 at equal intervals. Although the heating movable portion 72 shows an example of pressing the side surface of the steel plate 17 from four directions by the movable elastic member 73 made of a compression coil spring, the present invention is not limited to this, and the heating movable portion 72 may be pressed from multiple directions of two or more directions. .. In the example shown in FIG. 25, the heating unit 74 is a ring-shaped heater that surrounds the outer periphery of the heating movable unit holder 71.

The temperature of the heating movable portion 72 rises due to the heat of the heating portion 74. When the heated movable portion 72 presses the side surface of the steel plate 17, heat is transferred to the steel plate 17, and the applied adhesive 45 is cured to form the laminated steel plate 14. At the same time, since the steel plates 17 are aligned with the steel plate guide path 36 in the laminating direction, the laminated steel plates 14 can be formed by laminating the steel plates 17 without shifting. As shown in FIGS. 24 and 25, as an example, since the heating movable portion 72 presses the side surface of the steel plate 17 from four directions, the effect of aligning the steel plates 17 in the stacking direction is high.

As shown in FIG. 6, the steel plate guide path 36 extends downward from the outer shape punching die 31 of the outer shape lower die 30 in the direction along the vertical direction. The steel plate 17 punched by the outer punch 21 of the outer die 20 and the outer die 31 of the lower die 30 pushes down the lower steel plate 17 each time the steel plate 17 is punched in order, and reaches the steel plate alignment heating device 9. do. As shown in FIG. 27, when the heated movable portion 72 heated by the heating portion 74 presses the side surface of the steel plate 17, the steel plate 17 thermally expands. At this time, the movable elastic member 73 made of the compression coil spring expands and contracts to maintain the state of pressing the side surface of the steel plate 17. The inner dimension of the heated movable portion holder 71 is set so as to allow the thermal expansion of the steel plate 17 in consideration of its own thermal expansion. The reaction force of the movable elastic member 73 is received by the heated movable portion holder 71.

Further, the steel plate 17 and the laminated steel plate 14 located in the steel plate alignment heating device 9 receive pressure from the outer punch 21 when punching the steel plate 17. However, since the heated movable portion 72 holds the steel plate 17 or the laminated steel plate 14 from the side surface by the elastic force of the movable elastic member 73, the laminated steel plate 14 or the like is prevented from tilting or falling. The compression coil spring used for the movable elastic member 73 is preferably made of heat-resistant Inconel.

<Solving problems and effects of the steel sheet alignment heating device 9>
As described above, the steel sheet alignment heating device 9 solves various problems and is effective. The first issue is as follows. In the laminated steel sheet manufacturing apparatus 100 or the like, the steel plate 17 is punched by the outer punch 21 of the outer die 20 and the outer die 31 of the outer die 30, and the steel plate 17 is pushed downward in the vertical direction to the steel plate guide path 36. .. The steel plate 17 is in a state where the adhesive 45 is applied. Therefore, it is necessary to have a structure in which the steel plate 17 is heated in order to cure the thermosetting adhesive 45. Further, the steel plates 17 are moved downward one by one in the vertical direction by punching, but if they are not correctly aligned and laminated in the stacking direction along the steel plate guide path 36, the side surfaces of the laminated steel plates 14 are not aligned and adhered. There is a problem of getting rid of it.

The steel sheet alignment heating device 9 solves these problems. As shown in FIG. 27 and the like, the steel sheet alignment heating device 9 has a function of heating the steel plate 17 from the side surface to cure and bond the adhesive 45 by contacting the steel plate 17, and a stacking direction in the steel plate guide path 36. It can also have the function of aligning with. Therefore, the steel plate alignment heating device 9 can form the laminated steel plate 14 by adhering the steel plates 17 in a state of being aligned in the laminating direction.

Specifically, the heated movable portion 72, which has become hot due to the heating of the heating portion 74, presses the side surface of the steel plate 17 by the elastic force of the movable elastic member 73, and heats the steel plate 17 to cure the adhesive 45. Can be made to. At the same time, the steel plates 17 can be aligned in the laminating direction, and the steel plates 17 can be laminated in a state where the side surfaces are aligned to form the laminated steel plate 14.

The second issue is as follows. The steel sheet alignment heating device 9 needs to evenly apply heat to the surfaces of the steel plates 17 in contact with each other during laminating so that the adhesive 45 is evenly cured on the steel plates 17. At the same time, it is necessary to align the positions of the steel plates 17 with respect to the first central axis C1 in the stacking direction without any deviation. Further, when the heat of the heating portion 74 is transferred to the outer die, the dimensions of the outer die 31 and others change, and there is a problem that the dimensional accuracy when punching the steel plate 17 is lowered.

To solve this problem, as shown in FIGS. 24 and 25, the steel plate alignment heating device 9 arranges a plurality of heating movable portions 72 so as to surround the steel plate guide path 36, so that the steel plate 17 can be heated evenly. .. Therefore, the steel sheet alignment heating device 9 can evenly cure the adhesive 45 in the laminated steel sheet 14 and strengthen the adhesive force. Further, since the heating movable portion holder 71 is separated from the outer shape lower mold 30 in the vertical direction, heat transfer to the outer shape lower mold 30 can be reduced.

<Structure explanation for rotational drive of steel sheet alignment heating device 9>
Next, the configuration related to the rotary drive of the steel sheet alignment heating device 9 will be described. The configuration relating to the rotation drive of the steel sheet alignment heating device 9 described below is the lamination of the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the fifth embodiment in which the outer die 30 can rotate around the first central axis C1. This is the configuration of the steel sheet manufacturing apparatus 500. As already described with reference to FIG. 7 and the like, the lower mold drive device 19 in the rotation drive device 5 includes a heating device drive unit 93 that is rotationally driven by the rotation drive source 51. The heating device driving unit 93 (see FIG. 7) includes a heating device driving pulley 94 and a heating device driving belt 95 that transmits the rotation of the heating device driving pulley 94 to the steel plate aligned heating device 9.

As shown in FIG. 27, the steel sheet aligned heating device 9 includes a heating device pulley 84 that is rotatable around the first central axis C1 and passively rotates the heating device drive belt 95. By driving the heating device driving unit 93 in synchronization with the lower mold driving device 19, the heating movable portion holder 71 including the heating movable portion 72 is rotated in synchronization with the outer mold lower mold 30.

<Solutions and effects related to rotational drive of steel sheet alignment heating device 9>
As described above, the configuration relating to the rotational drive of the steel sheet alignment heating device 9 solves the following problems and is effective. In the steel plate alignment heating device 9, the cooling guide path 35 of the outer die 30 is in contact with the first convex shape portion 248 and the first concave shape portion 249, but is not in a state of being coupled to each other. Since the steel plate 17 and the laminated steel plate 14 rotate with the rotation of the outer shape lower mold 30, the portion of the steel plate alignment heating device 9 in contact with the steel plate 17 and the laminated steel plate 14 needs to rotate in synchronization with the outer shape lower mold 30. There is an issue.

In order to solve this problem, as shown in FIG. 7 and the like, the lower mold drive device 19 includes a heating device drive unit 93 that is rotationally driven by a rotary drive source 51. Therefore, the heating movable portion holder 71 including the heating movable portion 72 can be rotationally driven independently of the outer shape lower mold 30, and can be rotated in synchronization with the outer shape lower mold 30.

<Structure explanation of the first steel plate holding unit 8>
Next, the configuration of the first steel sheet holding unit 8 in the steel sheet alignment heating device 9 will be described with reference to FIGS. 24 to 28. The configuration of the first steel plate holding unit 8 described below is a configuration that can be applied in common to all the embodiments. As shown in FIG. 27, the steel sheet alignment heating device 9 further includes a first steel sheet holding unit 8 that holds the steel plate 17 and restricts the fall on the lower side in the vertical direction of the heating unit 7. The heating movable portion holder 71 includes a connecting hole 76 that engages with the first steel plate holding unit 8 (see FIGS. 24, 25, and 28).

As shown in FIGS. 26 and 27, the first steel plate holding unit 8 intersects the steel plate holding block 81 forming a part of the steel plate guide path 36 and the first central axis C1 with respect to the steel plate holding block 81. A steel plate holding movable portion 82 that can be moved in a direction is provided. Further, the first steel plate holding unit 8 includes a steel plate holding elastic member 83 that applies an elastic force to the steel plate holding movable portion 82 in the direction of the first central axis C1, and a connecting pin 85 that engages with the connecting hole 76. The steel plate holding movable portion 82 presses and holds the outer peripheral portion of the laminated steel plate 14 by the pressure of the steel plate holding elastic member 83. The steel plate holding movable portion 82 contacts and holds the outer peripheral portion of the steel plate 17 or the laminated steel plate 14 from a plurality of directions, and restricts the falling of the laminated steel plate 14 with respect to the steel plate guide path 36. In the example shown in FIG. 26, the steel plate holding movable portion 82 is in contact with the side surface of the steel plate 17 or the laminated steel plate 14 from four directions by the steel plate holding elastic member 83.

The configuration of the first steel plate holding unit 8 will be described in more detail with reference to FIGS. 26 and 27. As shown in FIG. 26, the steel plate holding movable portion 82 extends from four directions toward the first central axis C1 and holds the steel plate 17 or the laminated steel plate 14. The inner peripheral portion of the steel plate holding block 81 forming the steel plate guide path 36 is set to have a shape and dimensions corresponding to the outer shapes of the steel plate 17 and the laminated steel plate 14. In the example shown in FIG. 26, the inner peripheral portion of the steel plate holding block 81 has a square shape. The steel plate holding movable portion 82 shows an example of holding the steel plate 17 or the laminated steel plate 14 from four directions, but the present invention is not limited to this, and the steel plate holding movable portion 82 may be held from two or more directions.

As shown in FIG. 27, among the horizontal dimensions of the inner peripheral portion of the steel plate holding block 81, the upper side from the upper end portion of the groove on which the steel plate holding movable portion 82 slides is the first inner dimension 285. The first inner dimension 285 is set so that a slight gap is formed with respect to the dimension in which the laminated steel sheet 14 passing through is in a state of thermal expansion. As an example, the first inner dimension 285 is set so that the gap on one side with the laminated steel plate 14 is about 0.01 to 0.02 mm. This is because the laminated steel plate 14 can pass through the inner peripheral portion of the steel plate holding block 81 forming the steel plate guide path 36 even when it is thermally expanded.

On the other hand, as shown in FIG. 27, among the horizontal dimensions of the inner peripheral portion of the steel plate holding block 81, the lower side from the upper end portion of the groove on which the steel plate holding movable portion 82 slides is the second inner dimension 286. Is. The second inner dimension 286 is set to be larger than the first inner dimension 285 by about 0.2 mm (the gap on one side with respect to the laminated steel plate 14 is about 0.1 mm).

As shown in FIG. 6, the lower mold 3 includes a back pressure support base 315 that supports the laminated steel plate 14 from below at the lower end portion of the steel plate guide path 36 in the vertical direction. The back pressure support base 315 moves downward from the lower mold 3 in order to take out the laminated steel plate 14 from the laminated steel plate manufacturing apparatus 100 or the like. At that time, as shown in FIGS. 26 and 27, the steel plate holding movable portion 82 has an elastic force due to the steel plate holding elastic member 83 so that the laminated steel plate 14 not supported by the back pressure support base 315 does not fall downward due to its own weight. Holds the laminated steel plate 14 from the side surface.

Further, when the back pressure support base 315 supports the lower surface of the laminated steel plate 14 and moves downward, and when pressure is applied to the lower side when punching the steel plate 17 from the upper side, the laminated steel plate 14 is moved to the lower side. Slip through. Therefore, as described above, the second inner dimension 286 is set slightly larger than the first inner dimension 285.

Next, among the first steel sheet holding units 8, the configurations peculiar to the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment will be described. The steel plate holding block 81 is rotatable around the first central axis C1. As shown in FIGS. 26 and 27, the heating device pulley 84 is formed on the steel plate holding block 81. When the rotary drive source 51 is driven, the heating device pulley 84 passively rotates the heating device drive belt 95 to rotate the steel plate holding block 81 and the steel plate holding movable portion 82, and further via the connecting pin 85 and the connecting hole 76. The heating movable part holder 71 is rotated.

As shown in FIG. 27, the steel plate holding block 81 is provided with a ball retainer bearing as a bearing member 28 between the steel plate holding block 81 and the sub die plate 133, and smoothly rotates around the first central axis C1. In the laminated steel plate 14, the outer punch 21 of the outer die 20 and the outer die 31 of the outer die 30 continuously punch out the steel plates 17 one by one and laminate them on the lower side along the steel plate guide path 36. By pushing it out, it comes out of the steel plate guide path 36 of the lower mold 3.

<Solving problems and effects of the first steel plate holding unit 8>
As described above, the first steel plate holding unit 8 solves the following problems and is effective. The first problem is that when the steel plate alignment heating device 9 laminates the steel plates 17 to form the laminated steel plate 14, the weight of the laminated steel plate 14 is heavier than that of the steel plate 17, and the steel plate 14 may fall downward in the vertical direction. There is.

In order to solve this problem, as shown in FIGS. 26 and 27, the steel plate holding movable portion 82 of the first steel plate holding unit 8 contacts and holds the outer peripheral portion of the laminated steel plate 14, so that the weight is higher than that of the steel plate 17. It is possible to prevent the laminated steel sheet 14 from falling.

Further, the second problem is to guide the laminated steel sheet 14 downward along the steel plate guide path 36 in the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment. (1) It is necessary to rotate the steel plate holding unit 8 in synchronization with the heating movable portion holder 71. To solve this problem, the heating device pulley 84 formed on the steel plate holding block 81 rotates the heating movable portion holder 71 via the connecting pin 85 and the connecting hole 76. Therefore, the heating device driving unit 93 can rotate the steel plate holding movable portion 82 and the heating movable portion holder 71 in synchronization with each other.

<Structure explanation of the second steel plate holding unit 108>
Next, the configuration of the second steel plate holding unit 108 in the steel plate alignment heating device 9 will be described with reference to FIGS. 29 and 30. The configuration of the second steel plate holding unit 108 described below is a configuration that can be applied in common to all the embodiments. The same configuration as that of the first steel plate holding unit 8 shown in FIGS. 24 to 28 will not be described.

As shown in FIGS. 29 and 30, the steel plate alignment heating device 9 further includes a second steel plate holding unit 108 that holds the steel plate 17 and restricts the fall on the lower side in the vertical direction of the heating unit 7. The heated movable portion holder 71 includes a connecting hole 76 that engages with the second steel plate holding unit 108. The second steel plate holding unit 108 includes a steel plate holding block 88 forming a part of the steel plate guide path 36, a contact convex portion 89 in the steel plate holding block 88 that contacts the steel plate 17 or the laminated steel plate 14, and a connecting hole 76. A connecting pin 85 that engages with is provided. The contact convex portion 89 contacts and holds the outer peripheral portion of the laminated steel plate 14.

Next, among the second steel plate holding units 108, the configurations peculiar to the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment will be described. The heating device pulley 84 is formed on the steel plate holding block 88. When the rotary drive source 51 is driven, the heating device pulley 84 passively rotates the steel plate holding block 88 by passively rotating the heating device drive belt 95, and further rotates the heating movable portion holder 71 via the connecting pin 85 and the connecting hole 76. Let me.

As described above, the second steel plate holding unit 108 is different from the first steel plate holding unit 8 in that the first steel plate holding unit 8 does not have the steel plate holding movable portion 82 and the steel plate holding elastic member 83, but instead holds the steel plate. The point is that the contact convex portion 89 in the block 88 holds the laminated steel plate 14 and the like.

<Solving problems and effects of the second steel plate holding unit 108>
As described above, the second steel plate holding unit 108 solves the same problems as those described in the first steel plate holding unit 8 and is effective. The first problem is that when the steel plate alignment heating device 9 laminates the steel plates 17 to form the laminated steel plate 14, the weight of the laminated steel plate 14 is heavier than that of the steel plate 17, and the steel plate 14 may fall downward in the vertical direction. There is.

In order to solve this problem, as shown in FIGS. 29 and 30, the contact convex portion 89 of the steel plate holding block 88 of the second steel plate holding unit 108 contacts and holds the outer peripheral portion of the laminated steel plate 14, so that the steel plate 17 is held. It is possible to prevent the laminated steel sheet 14, which is heavier than the above, from falling.

Further, the second problem is to guide the laminated steel sheet 14 downward along the steel plate guide path 36 in the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment. (Ii) It is necessary to rotate the steel plate holding unit 108 in synchronization with the heating movable part holder 71. To solve this problem, the heating device pulley 84 formed on the steel plate holding block 88 rotates the heating movable portion holder 71 via the connecting pin 85 and the connecting hole 76. Therefore, the heating device driving unit 93 can rotate the steel plate holding movable portion 82 and the heating movable portion holder 71 in synchronization with each other.

<Explanation of the relationship between the first steel plate holding unit 8 and the outer die 30>
Next, the relationship between the first steel plate holding unit 8 and the outer shape lower die 30 will be described with reference to FIGS. 24 to 28. The relationships described below are common to all embodiments. A part of the lower end portion of the outer shape lower mold 30 in the vertical direction and a part of the upper end part of the heating movable part holder 71 of the steel plate alignment heating device 9 form a first convex shape portion 248 on the outer shape lower mold 30. A first concave shape portion 249 corresponding to the first convex shape portion 248 is formed on the heating movable portion holder 71. A part of the lower end portion of the heated movable portion holder 71 in the vertical direction and a part of the upper end portion of the steel plate holding block 81 form a second convex shape portion 258 on one side and correspond to the second convex shape portion 258 on the other side. The second concave shape portion 259 is formed.

As shown in FIG. 27, the outer shape lower mold 30 and the heating movable portion holder 71 are in contact with each other only in the direction in which the first convex shape portion 248 and the first concave shape portion 249 intersect with the first central axis C1. To engage. Further, the lower side surface 266 forming the lower end of the outer shape lower mold 30 in the vertical direction and the upper side surface 267 forming the upper side of the heating movable portion holder 71 are separated from each other. The center position of the portion of the steel plate guide path 36 formed by the outer die lower mold 30 and the portion formed by the heating movable portion holder 71 coincides with the first central axis C1. The heated movable portion holder 71 and the steel plate holding block 81 are in contact with each other in contact with the second convex shaped portion 258 and the second concave shaped portion 259, and the portion of the steel plate guide path 36 formed by the heated movable portion holder 71. The center position of the portion formed by the steel plate holding block 81 and the portion formed by the steel plate holding block 81 coincides with the first central axis C1.

As shown in FIG. 27, the first convex shape portion 248 and the first concave shape portion 249 have a gap 265 in the vertical direction. Therefore, the contact between the first convex shape portion 248 and the first concave shape portion 249 is only a part, and the configuration is not in a state of being connected to each other but in a separated state. Further, the gap 265 prevents interference with the cooling guide path 35 when the heated movable portion holder 71 thermally expands and the dimension in the vertical direction changes. When the temperature of the heated movable portion holder 71 rises due to the heating of the heating portion 74, heat transfer to the cooling guide path 35 can be suppressed.

As shown in FIGS. 24 and 25, the first concave shape portion 249 has a square shape as an example, and the first convex shape portion 248 to be fitted is also a square shape. The first convex shape portion 248 and the first concave shape portion 249 are not limited to a square shape, but may be another polygonal shape, or may be a circular shape or an elliptical shape. Further, as shown in FIG. 26, the second convex shape portion 258 and the second concave shape portion 259 are also rectangular in shape. The shape is not limited to a square shape, but may be another polygonal shape, or may be a circular shape or an elliptical shape.

The first convex shape portion 248 and the first concave shape portion 249, and the second convex shape portion 258 and the second concave shape portion 259 are all formed so as to be tightly fitted at room temperature. At room temperature, a gap is created between the cooling guide path 35 and the heated movable portion holder 71, and between the heated movable portion holder 71 and the steel plate holding block 81 to prevent misalignment with respect to the first central axis C1. Because. This prevents the laminated steel plates 14 from being displaced and overlapped in the laminating direction when the steel plates 17 are laminated.

Next, the relationship between the connecting hole 76 and the connecting pin 85 will be described with reference to FIGS. 24 and 28. A plurality of connecting pins 85 are provided on the same circumference centered on the first central axis C1 in the steel plate holding block 81. The connecting hole 76 is formed in the heated movable portion holder 71 corresponding to the position of the connecting pin 85, and the length 77 in the direction intersecting the first central axis C1 is equal to or larger than the diameter of the connecting pin 85.

The relationship between the width 78 in the circumferential direction about the first central axis C1 and the diameter of the connecting pin 85 is that the width in the circumferential direction is equal to or larger than the diameter of the connecting pin 85, and the gap between them is , It is the relationship of the degree of fine turning in the gap fitting. Gap fitting is generally a state in which the shaft diameter is smaller than the hole diameter and there is a gap. The case where the maximum allowable dimension of the shaft diameter is smaller than the minimum allowable dimension of the hole diameter is shown. Among them, the precision transfer shows the relationship when a precise movement with almost no backlash is required between each other. In this case, the width 78 of the connecting hole 76 is machined to match the diameter of the connecting pin 85 so that there is no gap to the extent that it can slide relatively in the direction intersecting the first central axis C1.

When the heating movable portion holder 71 is thermally expanded by the heating portion 74 heating the heating movable portion 72, the connecting hole 76 is the end portion on the side of the first central axis C1 in the direction intersecting the first central axis C1. It engages with the connecting pin 85 in the circumferential direction around the first central axis C1. The steel plate holding block 81 and the heated movable portion holder 71 move each other in the direction in which the first central axis C1 intersects with the first central axis C1 and in the circumferential direction around the first central axis C1. To prevent.

As an example shown in FIG. 24, when the connecting hole 76 is a rectangular hole, when the laminated steel plate 14 and the heated movable portion holder 71 thermally expand, they expand substantially evenly radially in the horizontal direction about the first central axis C1. .. On the other hand, the amount of expansion is very small in the circumferential direction. When a plurality of connecting holes 76 are provided, it is desirable to arrange them evenly in the circumferential direction. This is because even if there is a gap between each connecting hole 76 and the connecting pin 85, the positional deviation between the heated movable portion holder 71 and the steel plate holding block 81 can be reduced if a plurality of locations are provided.

The heating movable portion holder 71 thermally expands substantially uniformly in the horizontal direction with the first central axis C1 as the center. In this case, a gap is evenly generated between the second convex-shaped portion 258 of the steel plate holding block 81 and the second concave-shaped portion 259 of the heated movable portion holder 71. On the other hand, in the direction intersecting the first central axis C1, the connecting hole 76 and the connecting pin 85 engage with each other to prevent mutual movement. Therefore, the heated movable portion holder 71 and the steel plate holding block 81 maintain a positional relationship centered on the first central axis C1 in the direction intersecting the first central axis C1. Further, in the circumferential direction, when the connecting hole 76 is rectangular, the positional relationship between the connecting pin 85 and the connecting pin 85 in the circumferential direction is maintained in the same manner because there is little change in the gap even if the heat movable portion holder 71 thermally expands. do.

Next, with reference to FIG. 28, the configuration when the connecting hole 76 has a specific form will be described. The connecting hole 76 has an arc shape in which the end portion 86 on the side of the first central axis C1 is formed with a radius 79 equal to or larger than the radius of the connecting pin 85 in the direction intersecting the first central axis C1. It is an opening whose width in the circumferential direction becomes wider as the distance from C1 increases. It should be noted that preferably, the radius 79 of the end portion 86 on the side of the first central axis C1 is a minute gap with respect to the connecting pin 85 and has substantially the same radius as the radius of the connecting pin 85.

As shown in FIG. 28A, at room temperature, there is a gap 87 between the connecting pin 85 and the end portion 86 of the connecting hole 76 on the side of the first central axis C1. On the other hand, as shown in FIG. 28 (b), when the heated movable portion holder 71 thermally expands, it expands in the direction of the arrow. At this time, since the steel plate holding block 81 provided with the connecting pin 85 does not expand due to thermal expansion, the gap 87 disappears and the connecting pin 85 and the end portion 86 of the connecting hole 76 are engaged with each other. The steel plate holding block 81 and the heated movable portion holder 71 maintain a positional relationship in a state where the center positions of the steel plate holding block 81 and the heated movable portion holder 71 coincide with the first central axis C1. As described above, since the relative positional relationship between the heated movable portion holder 71 and the steel plate holding block 81 changes, the connecting hole 76 and the connecting pin 85 engage with each other and come into contact with each other in the vertical direction. It is in a state and is not fixed between each other.

<Solving problems and effects in the relationship between the first steel plate holding unit 8 and the outer die 30>
As described above, the configuration in the relationship between the first steel plate holding unit 8 and the outer shape lower die 30 solves various problems and is effective. The first issue is as follows. The steel plate alignment heating device 9 heats the steel plate 17 in order to heat and cure the adhesive 45 applied to the steel plate 17, but the dimensions change when heat is transferred to the outer shape punching die 31 of the outer die 30. , The dimensional accuracy is lowered when the steel plate 17 is punched out.

A configuration for solving this problem will be described with reference to FIGS. 24, 25, and 27. The cooling guide path 35 of the outer die 30 and the heating movable portion holder 71 of the steel plate aligned heating device 9 have a first convex shape portion 248 and a first concave shape portion 249 intersecting with the first central axis C1. Contact and engage only in the direction in which it is. Further, the lower side surface 266 forming the lower end of the outer shape lower mold 30 in the vertical direction and the upper side surface 267 forming the upper end of the heating movable portion holder 71 are separated from each other. The center position of the portion of the steel plate guide path 36 formed by the outer die lower mold 30 and the portion formed by the heating movable portion holder 71 coincides with the first central axis C1. Therefore, the center position of the steel plate guide path 36 between the outer shape lower die 30 and the heating movable portion holder 71 can be matched. Since only the first convex shape portion 248 and the first concave shape portion 249 are in contact with each other and are separated from each other in the vertical direction, the outer shape lower mold 30 and the heating movable portion holder 71 are externally formed from the heating movable portion holder 71. The heat transfer to the lower mold 30 can be limited.

Further, as shown in FIGS. 26 and 27, the heated movable portion holder 71 and the steel plate holding block 81 are in contact with each other in contact with the second convex shape portion 258 and the second concave shape portion 259. The center position of the portion of the steel plate guide path 36 formed by the heated movable portion holder 71 and the portion formed by the steel plate holding block 81 coincides with the first central axis C1. Therefore, the steel plate alignment heating device 9 can match the center position of the steel plate guide path 36 connected to the steel plate holding block 81 from the outer shape lower die 30 in the vertical direction.

Next, the second issue is as follows. The heating movable portion holder 71 thermally expands due to the influence of heating by the heating portion 74. Since the steel plate holding block 81 joined to the lower side in the vertical direction with respect to the heated movable portion holder 71 is not directly affected by the heating of the heated portion 74, the dimensional change due to thermal expansion is different. At this time, there is a possibility that the center position of the heated movable portion holder 71 and the steel plate holding block 81 is displaced with respect to the first central axis C1. If the center position is deviated, a step is generated between the steel plate guide path 36 formed by the heated movable portion holder 71 and the steel plate guide path 36 formed by the steel plate holding block 81, and the steel plate 17 and the laminated steel plate 14 are smoothly lowered. I can't move to the side.

In particular, when the size of the laminated steel plate 14 is large, the size of the corresponding portion of the outer shape lower die 30 is large, so that the amount of deformation due to thermal expansion is large. That is, since the size of the steel plate aligned heating device 9 becomes large, the gap between the first convex shape portion 248 of the cooling guide path 35 and the first concave shape portion 249 of the heating movable portion holder 71 may be non-negligible. In that case, the center position of the heated movable portion holder 71 deviates from the first central axis C1. In particular, when the outer die 30 is rotated every time the steel plate 17 is punched out, the backlash between the cooling guide path 35 and the heating movable portion holder 71 becomes large due to the influence of the rotational inertia force. Then, there is a problem that the position of the steel plate 17 is disturbed and the side surface of the laminated steel plate 14 is disturbed.

In order to solve this problem, the steel sheet alignment heating device 9 is effective with the following configuration. As shown in FIGS. 24, 25, and 28, when the heated movable portion holder 71 is thermally expanded, the connecting pin 85 and the connecting hole 76 are engaged with each other, and the first center is centered on the first center axis C1. The movements of each other are prevented in the direction crossing the axis C1 and in the circumferential direction about the first central axis C1. Therefore, the heated movable portion holder 71 and the steel plate holding block 81 are integrated in a state where the center positions of the steel plate holding block 81 and the steel plate holding block 81 are more reliably aligned with each other with the first central axis C1 as the center. Maintain the state of.

The configuration of the connecting pin 85 and the connecting hole 76 is to absorb the deviation due to the deformation that occurs between the heated movable portion holder 71 and the steel plate holding block 81. This is because the heated movable portion holder 71 thermally expands and deforms together with the steel plate 17 and the laminated steel plate 14 due to the heating of the heated movable portion 72. Therefore, even if the heated movable portion holder 71 thermally expands, the function of aligning the steel plate 17 and the laminated steel plate 14 can be maintained.

Next, the third issue is as follows. When the outer die 30 rotates about the first central axis C1, if the heated movable portion holder 71 is thermally expanded, shaking may occur with the steel plate holding block 81, which is a problem. As described above, the cooling guide path 35 and the heating movable portion holder 71 are not fixed but simply fitted. If there is a gap between the first convex shape portion 248 of the cooling guide path 35 and the first concave shape portion 249 of the heating movable portion holder 71, when the outer die 30 is rotated, it rotates between the two. There is a possibility that the heating movable part holder 71 may shake due to a timing shift, which is a problem.

In order to solve this problem, the connecting hole 76 shown in the example of FIG. 28 has the following configuration. The connecting hole 76 has an arc shape in which the end portion 86 on the side of the first central axis C1 has a radius 79 equal to or larger than the radius of the connecting pin 85, and the width in the circumferential direction increases as the distance from the first central axis C1 increases. It is an opening. It should be noted that preferably, the radius 79 of the end portion 86 on the side of the first central axis C1 is a minute gap with respect to the connecting pin 85 and has substantially the same radius as the radius of the connecting pin 85. As shown in FIG. 28B, when the heated movable portion holder 71 thermally expands in the direction of the arrow, the connecting pin 85 engages more securely in the arc-shaped portion of the connecting hole 76, and the heated movable portion holder 71 and the steel plate are engaged. The state in which the center positions of the holding block 81 and the holding block 81 are in agreement is maintained. Since the connecting hole 76 and the connecting pin 85 are more reliably engaged with each other, the heated movable portion holder 71 and the steel plate holding block 81 have an effect of integrally preventing shaking.

<Structure explanation of cooling device 6>
Next, the configuration of the cooling device 6 will be described with reference to FIGS. 31 to 33. First, a configuration common to all embodiments will be described. The lower mold 3 includes a cooling device 6 above the steel plate aligned heating device 9 in the vertical direction (see FIG. 6). The cooling device 6 includes the following elements. Cooling guide path 35 forming a part of the steel plate guide path 36. Inner cooling unit 61 fixed to the outer peripheral side of the cooling guide path 35. An outer cooling unit 62 located on the outer peripheral side of the inner cooling unit 61 and directly or indirectly fixed to the lower mold 3. A coolant circulation unit 64 formed between the inner cooling unit 61 and the outer cooling unit 62. Further, a cooling agent supply unit 65 for supplying the cooling agent 260 to the cooling agent circulation unit 64 is provided. The coolant 260 can circulate on the outer periphery of the inner cooling unit 61.

Further, as shown in FIGS. 31 to 33, the cooling device 6 is provided with a first opening 66 and a drain gutter 96 (97) in the outer cooling portion 62, and is directly or indirectly fixed to the lower mold 3. The outer cooling unit fixing base 63 is provided. The outer cooling unit 62 is fixed to the outer cooling unit fixing base 63. The outer cooling unit fixing base 63 forms the second opening 67. The coolant circulation portion 64 forms a closed space except for the first opening 66 and the drain gutter 96 (97). The coolant supply unit 65 includes a coolant cooling unit 69 and at least two cooling pipes 68 connected to the coolant cooling unit 69 to supply the coolant 260.

As shown in FIG. 32, the cooling device 6 includes a large number of first drain gutters 96 inside the outer cooling unit 62. The first drain gutter 96 is a gutter extending in the vertical direction connecting the first coolant reservoir 263 and the second coolant reservoir 264, which will be described later. At least one cooling pipe 68 is passed through the first opening 66 and connected to the coolant circulation unit 64, and the other cooling pipe 68 is passed through the second opening 67 and connected to the coolant circulation unit 64. The cooling agent 260 whose temperature has risen by cooling the inner cooling unit 61 in contact with the cooling guide path 35 passes through the second opening 67 from the second drain gutter 97 and lowers the temperature at the cooling agent cooling unit 69. The coolant 260 can be circulated by further supplying the coolant 260 to the coolant circulation unit 64 via the cooling pipe 68. The coolant 260 can circulate on the outer periphery of the inner cooling unit 61. The drain gutter corresponds to the one including the first drain gutter 96 and the second drain gutter 97.

2 and the like, and FIGS. 31 to 33, the laminated steel plate manufacturing apparatus 100 and the like include the configurations of the adhesive coating apparatus 4 and the steel plate alignment heating apparatus 9, and the outer die lower die 30 is inside the lower die 3. An example is shown in which the outer die 30 is rotatable around the first central axis C1. However, the cooling device 6 described above is not limited to this, and can be applied even in a configuration in which the laminated steel sheet manufacturing device 100 or the like does not include the adhesive coating device 4 and the steel sheet alignment heating device 9. Alternatively, in a configuration such as the laminated steel sheet manufacturing apparatus 600 of the sixth embodiment, the lower die 3 does not include the outer outer die 30, or the outer lower die 30 does not rotate around the first central axis C1. Is also applicable. Although not shown, the laminated steel sheet 14 can be laminated by caulking instead of being bonded by the adhesive 45.

In the cooling device 6 described above, when applied to the laminated steel sheet manufacturing device 100 of the first embodiment to the laminated steel sheet manufacturing device 500 of the fifth embodiment, that is, the outer shape lower die 30 is around the first central axis C1. The configuration when it can be rotated will be described. The outer shape lower die 30 includes a steel plate guide path 36 extending downward in a direction along the vertical direction with the first central axis C1 as the center. The outer die 30 is rotatable about the first central axis C1, and the steel plate guide path 36 is a direction along the vertical direction of the steel plate 17 punched by the outer die 20 and the outer die 30. Guide to the bottom. The lower mold 3 includes a cooling device 6 for cooling the outer mold 30.

The cooling device 6 includes the following components. A cooling guide path 35 that forms a part of the steel plate guide path 36 and is integrally formed with or connected to the outer shape lower die 30 and rotates synchronously with the outer shape lower die 30. An inner cooling unit 61 fixed to the outer peripheral side of the cooling guide path 35 and rotating in synchronization with the outer mold 30. An outer cooling unit 62 located on the outer peripheral side of the inner cooling unit 61 and directly or indirectly fixed to the lower mold 3. A coolant circulation unit 64 formed between the inner cooling unit 61 and the outer cooling unit 62. A cooling agent supply unit 65 for supplying the cooling agent 260 to the cooling agent circulation unit 64 is provided. The coolant 260 can circulate on the outer periphery of the inner cooling unit 61 as the inner cooling unit 61 rotates. The components other than those described above are the same as the common components already described.

Next, with reference to FIGS. 31 and 33, the configurations of the upper first cooling agent reservoir 263 and the lower second cooling agent reservoir 264 of the inner cooling unit 61, which are common to all the embodiments, will be described. The lower mold 3 is connected to the coolant circulation portion 64 at the upper end portion in the vertical direction of the inner cooling portion 61, and is connected to the coolant circulation portion 64 in the circumferential direction between the inner cooling portion 61 and the outer cooling portion 62 in the coolant circulation portion 64. A groove-shaped first coolant reservoir 263 having a gap larger than the gap is provided. The lower mold 3 is located below the inner cooling portion 61 in the vertical direction in the outer cooling portion fixing base 63, is continuous with the coolant circulating portion 64, and is between the inner cooling portion 61 and the outer cooling portion 62. A groove-shaped second coolant reservoir 264 having a gap larger than the gap is provided.

<Detailed description of the cooling device 6>
Next, the configuration of the cooling device 6 will be described in more detail with reference to FIGS. 31 to 33. Here, the cooling device 6 applied to the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment will be described. The cooling device 6 is composed of a cooling guide path 35, an inner cooling unit 61, and an outer cooling unit 62, and circulates the cooling agent 260 between the inner cooling unit 61 and the outer cooling unit 62.

The inner cooling portion 61 is fitted and fixed in a ring shape to the outer periphery of the cooling guide path 35. The outer cooling unit 62 is fixed to the outer periphery of the inner cooling unit 61. The inner cooling section 61 is rotatable around the first central axis C1 together with the cooling guide path 35. The inner cooling unit 61 uses a material such as copper or aluminum having good thermal conductivity. The outer cooling portion 62 is fixed to the cooling guide path housing 131 (see FIG. 6) of the lower mold 3.

The outer cooling portion 62 forms a first opening 66 and a second opening 67 which are a plurality of coolant injection holes, and is composed of a cooling flow path groove 261 which is a vertical groove and a cooling flow path groove 262 which is a horizontal groove. The agent circulation portion 64 is formed. A plurality of cooling agent circulation portions 64 are formed on the inner peripheral side of the outer cooling portion 62 substantially evenly in the circumferential direction. In the example shown in FIG. 32, the particles are formed at four locations in the circumferential direction, but the present invention is not limited to this example and can be formed at a plurality of locations of two or more locations. The coolant 260 supplied from the coolant supply unit 65 flows through the cooling pipe 68, through the first opening 66, and to the coolant circulation unit 64.

The cooling agent 260 whose temperature has risen by circulating through the cooling agent circulation unit 64 passes through the second opening 67, is cooled by the cooling agent cooling unit 69, and flows back to the cooling agent circulation unit 64. Therefore, the coolant 260 continuously cools the steel plate guide path 36 and its surroundings. Since the coolant 260 is sprayed from the first opening 66 at a pressure sufficient to circulate, the cooling guide path 35 is rapidly cooled through the inner cooling portion 61. The coolant 260 may be water or other liquid, or may be argon gas or other gas.

As shown in FIG. 6, the cooling device 6 is located below the outer shape punching die 31 of the outer shape lower die 30 and above the steel plate aligned heating device 9 in the vertical direction. The temperature of the steel plate 17, the laminated steel plate 14, and the steel plate guide path 36 rises due to the heating by the steel plate alignment heating device 9. On the other hand, since the cooling device 6 is located on the upper side of the steel sheet aligned heating device 9, the temperature rise due to heat transfer from the lower side of the steel plate guide path 36 or the like is reduced or stopped.

Since the coolant 260 is ejected from the first opening 66 at a constant pressure, there is a possibility that the coolant 260 is ejected from the inner cooling portion 61 and the outer cooling portion 62 to the outside. In that case, the coolant 260 spreads inside the lower mold 3, causing corrosion and other problems. The upper first coolant reservoir 263 and the lower second coolant reservoir 264 of the inner cooling unit 61, which have already been described, are configured to prevent the coolant 260 from being ejected to the outside.

As shown in FIGS. 31 and 33, the first coolant reservoir 263 is connected to the coolant circulation portion 64 at the upper end portion in the vertical direction of the inner cooling portion 61, and is formed in the circumferential direction with the inner cooling portion 61 and the outer side. The gap is larger than the gap between the cooling unit 62 and the cooling unit 62. In the first coolant reservoir 263, in the cross-sectional view of FIG. 31, etc., the inner cooling portion 61 surrounds three of the four directions, and the outer cooling portion 62 is a vertical groove on the lower side in the other one direction. The structure is such that the portion excluding the cooling flow path groove 261 is closed.

In the cross-sectional view of FIG. 31, etc., the second coolant reservoir 264 surrounds three of the four directions with the lower end of the inner cooling portion 61 inserted into the recess formed in the outer cooling portion fixing base 63. On the upper side in one direction, the outer cooling unit 62 is configured to close the portion excluding the cooling flow path groove 261 which is a vertical groove.

<Solutions and effects of cooling device 6>
As described above, the cooling device 6 solves various problems and is effective. The first issue is as follows. In the laminated steel plate manufacturing apparatus 100 and the like, when the dimensions of the outer punch 21 of the outer die 20 and the outer die 31 of the outer die 30 change due to heat, the dimensional accuracy when punching the steel plate 17 decreases, and the correct shape is obtained. There is a problem that it cannot be formed. There are several causes for the temperature rise, but as an example, when the steel plate 17 is punched out by the outer shape punch 21 and the outer shape punching die 31, frictional heat is generated at the time of punching out, which may cause the temperature rise.

Further, when forming the laminated steel sheet 14, when the steel sheets 17 are laminated by caulking, frictional heat may be generated during the lamination and the temperature may rise. Further, when the adhesive 45 is thermosetting, it is necessary to heat the steel plate 17 inside the lower mold 3. In this case, the temperature of the lower die 3 may rise, and the temperature of the outer die 31 may also rise. Further, in the case of the laminated steel plate manufacturing apparatus 100 to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment, the outer shape lower mold 30 rotates around the first central axis C1 with respect to the lower mold 3. At this time, frictional heat due to rotational sliding may be generated between the outer die 30 and the lower die 3, and the temperature of the outer die 31 may rise. The cooling device 6 provided in the laminated steel sheet manufacturing device 100 or the like solves these problems.

As shown in FIGS. 31 to 33, the cooling device 6 is directly or indirectly fixed to the inner cooling portion 61 fixed to the cooling guide path 35 which is a part of the steel plate guide path 36 and to the lower mold 3. A coolant circulation unit 64 is formed between the outer cooling unit 62 and the outer cooling unit 62. Therefore, the coolant 260 can circulate in the coolant circulation portion 64 in the circumferential direction to cool the inner cooling portion 61 and the cooling guide path 35.

Further, in the case of the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment, the coolant 260 rotates the inner cooling portion 61 to rotate the coolant circulating portion 64 in the circumferential direction. Since it circulates, the inner cooling portion 61 can be further cooled with respect to the entire circumferential direction. Further, the cooling guide path 35 in contact with the inner cooling unit 61 can be cooled. Further, as shown in FIG. 17, in the laminated steel sheet manufacturing apparatus 500, rotation control is performed by rotating the outer shape lower die 30, the cooling guide path 35, and the inner cooling portion 61 by a predetermined angle θ by the rotation driving device 510. Therefore, since the cooling agent 260 can circulate more on the outer periphery of the inner cooling unit 61 in the cooling agent circulation unit 64, the inner cooling unit 61 can be further cooled.

Next, the second issue is as follows. The laminated steel plate manufacturing apparatus 100 and the like continuously punch out the steel plate 17 and laminate the laminated steel plate 14. Since the temperature rise described above occurs continuously, the cooling device 6 needs to be continuously cooled, which is a problem.

In order to solve this problem, as shown in FIGS. 31 to 33 described above, the cooling device 6 includes a cooling agent cooling unit 69, cools the cooling agent 260 whose temperature has risen, and cools the cooling agent 260 through the cooling pipe 68. It can be circulated to the agent circulation unit 64. Therefore, the cooling device 6 can exert the effect of continuously cooling the cooling guide path 35.

Next, the third issue is as follows. In the cooling device 6, since the coolant 260 is ejected from the first opening 66 at a constant pressure, there is a possibility that the coolant 260 is ejected from the inner cooling unit 61 and the outer cooling unit 62 to the outside. In that case, there is a problem that the coolant 260 spreads inside the lower mold 3 and causes corrosion and other problems.

In particular, in the case of the laminated steel sheet manufacturing apparatus 100 to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment, when the outer die 30 rotates around the first central axis C1, the coolant 260 is further discharged to the outside by the rotational inertial force. Easy to spout.

In order to solve this problem, as shown in FIGS. 31 to 33, in the cooling device 6, the cooling agent 260 flowing into the cooling agent circulation unit 64 moves upward and downward in the vertical direction of the cooling agent circulation unit 64. When spread, the coolant 260 accumulates in the first coolant reservoir 263 and the second coolant reservoir 264. Therefore, it is possible to prevent the coolant 260 from flowing out to the outside of the cooling device 6. Further, when the coolant 260 spreads upward and downward in the vertical direction of the coolant circulation unit 64 with the rotation of the inner cooling unit 61, the coolant 260 also has the first coolant reservoir 263 and the second coolant reservoir 263. It collects in 264. Therefore, it is possible to prevent the coolant 260 from flowing out to the outside of the cooling device 6.

Further, as shown in FIG. 32, since a large number of first drain gutters 96 are provided inside the outer cooling unit 62, when the scattered coolant 260 accumulates in the first cooling agent reservoir 263, the coolant 260 is rapidly added. It can be discharged to the second coolant reservoir 264. Further, as shown in FIG. 33, the second drain gutter 97 can discharge the coolant 260 accumulated in the second coolant reservoir 264 and circulate it to the coolant supply unit 65. Therefore, the coolant 260 can be rapidly circulated to enhance the cooling effect.

<Manufacturing method>
Next, a method for manufacturing a laminated steel sheet according to the second aspect of the present invention will be described. The laminated steel sheet manufacturing method described here is premised on using the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment. First, the configuration related to the steel sheet manufacturing method will be described with reference to the block diagram of FIG. The laminated steel sheet manufacturing apparatus 100 and the like include a control device 90 that controls the entire drive and the like. The input device 18 not only inputs the start and stop of the punching work of the steel plate 17, but also determines the number of punched sheets for determining how many steel plates 17 are punched each time the outer die 11 is rotated. It is also an input device.

The information input to the input device 18 is received by the input / output interface 180, and the CPU 181 performs each process. The CPU 181 performs a rotation drive source drive process by the rotation drive control device 54, a transfer drive process for transferring the steel plate material 16, and a mold elevating drive process for raising and lowering the upper mold 2. Regarding these processes, the ROM 182 and the RAM 183 perform information storage processing.

Next, the CPU 181 provides each processed drive information to each drive circuit from the input / output interface 180. When driving the rotation drive device 5, the CPU 181 gives drive information to the rotation drive circuit 184 to drive the rotation drive source 51. When the steel plate material 16 is transferred, drive information is given to the transfer drive circuit 185 to drive the transfer drive source 310. Further, in the process of punching out the steel plate 17 by raising and lowering the upper die 2 with respect to the lower die 3, the CPU 181 gives drive information to the die raising and lowering drive circuit 186, and the die raising and lowering drive source 80 raises and lowers the die. Drives the drive device 70.

Next, a process of manufacturing the laminated steel sheet 14 from the steel sheet material 16 will be described. The configuration of the laminated steel sheet manufacturing apparatus 100 and the like to be used is as follows as shown in FIG. 2 and the like. A die 10 composed of an upper die 2 including an outer die 20 and a lower die 3 including an outer lower die 30 as a pair for punching a steel plate 17 from a steel plate material 16. A rotary drive device 5 for rotationally driving the outer die 20 and the outer die 30. An adhesive application device 4 for applying an adhesive 45 to a steel plate 17 including a steel plate material 16 in the upper mold 2. A steel plate guide path 36 extending downward in the direction along the vertical direction in the outer die 30. A steel plate alignment heating device 9 that heats the steel plate 17 in the steel plate guide path 36 on the lower side in the vertical direction from the outer die 30. The lower mold 3 comprises a cooling device 6 provided above the steel plate aligned heating device 9 in the vertical direction.

The laminated steel sheet manufacturing method comprises the following first to fourth steps. In the first step, the upper die 2 is moved downward in the direction along the vertical direction, and the steel plate 17 is punched out by the outer die 20 and the outer die 30. In the second step, the adhesive 45 is applied to the steel sheet 17 by the adhesive coating device 4 in accordance with the first step. In the third step, the steel plate alignment heating device 9 contacts and heats the outer peripheral side surface of the punched steel plate 17, cures the adhesive 45 applied to the steel plate 17, and aligns the steel plates 17 in the stacking direction. In the fourth step, the outer die 20 and the outer die 30 are rotated by a predetermined angle by the rotation drive device 5.

The first step to the third step are performed every time the steel plate 17 is punched out. In the step of applying the adhesive 45 in the second step, as described with reference to FIG. 23, in order to adjust the number of laminated steel sheets 14, the adhesive is stopped every time a predetermined number of steel sheets 17 are punched out. Stop the application of 45. Here, the predetermined number of sheets is the number of sheets of steel sheets 17 to be laminated in advance to produce the laminated steel sheets 14. This is because the laminated steel sheet 14 having a certain thickness is continuously produced by stopping the second step every time a predetermined number of sheets are punched. The fourth step is performed every time the rotary drive source 51 is driven, every time one steel plate 17 is punched out, or every time a predetermined number of steel plates 17 are punched out. For example, when the fourth step is performed every time one steel plate 17 is punched out, the first step to the fourth step are continuously performed. When the first step to the fourth step are continuously performed in the laminated steel sheet manufacturing apparatus 100 or the like, it is not necessary to input the number of punched sheets for instructing the rotation timing of the outer die 11.

Next, a specific example of the process of punching the steel plate 17 will be described with reference to FIGS. 34 and 35. In the example shown in FIG. 34, the steel plate 17 has an outer shape that is not point-symmetrical. In this case, the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 400 of the fourth embodiment are applicable. In addition to the T-shaped outer shape, the steel plate 17 has holes 350 at three internal locations. The mold 10 includes a first subsidy mold 311, a second subsidy mold 312, a third subsidy mold 313, and an outer mold 11. From the first subsidy die 311 to the third subsidy die 313, a hole 350 excluding the outer shape of the steel plate 17 is formed. The holes 350 have a shape in which three holes are arranged at the positions of vertical bars with respect to the outer shape of the T-shape.

The outer die 11 rotates by a predetermined angle θ every time one steel plate 17 is punched out or every time a predetermined number of steel plates 17 are punched out. At this time, the positions of the three holes 350 change each time the outer mold 11 rotates. Therefore, from the first subsidy mold 311 to the third subsidy mold 313, the hole 350 is formed on the assumption that the outer mold 11 rotates by a predetermined angle θ. In the example shown in FIG. 34, the predetermined angle θ is 45 degrees. That is, the hole 350 is formed not only at the originally formed position but also at the position rotated at a cycle of 45 degrees. In the example of FIG. 34, the steel plate 17 has a hole 350 inside in addition to the outer shape, but in the case of only the outer shape, the steps performed by the first auxiliary mold 311 to the third auxiliary mold 313 are unnecessary. be.

Next, in the example shown in FIG. 35, the outer shape of the steel plate 17 is a circular shape, which is a point-symmetrical shape. That is, the outer shapes match before and after the rotation by a predetermined angle θ. In this case, the outer mold 30 of the outer mold 11 is configured to be rotatable around the first central axis C1, while the outer mold 20 is configured to be rotatable around the first central axis C1. It does not have to be. In this example, the mold 10 includes a first subsidy mold 311 to a fourth subsidy mold 314 and an outer mold 11. In this case, the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment are applicable.

<Effect of manufacturing method>
In the laminated steel sheet manufacturing method, the first step to the third step are performed on a predetermined number of sheets including one of the steel sheets 17, and the fourth step is performed every time one sheet of the steel sheet 17 is punched out or every time a predetermined number of steel sheets 17 are punched out. .. In the laminated steel plate manufacturing method, the outer die 20 and the outer die 30 are rotated on the steel plate material 16 for each predetermined number of sheets including one of the steel sheets 17, and the outer shape is punched and bonded. Therefore, regardless of the outer shape of the steel plate 17, even if there is a deviation in the thickness of the steel plate material 16, the deviation in the thickness of the laminated steel plate 14 can be reduced.

2 Upper mold 3 Lower mold 4 Adhesive coating device 5 Rotation drive device 6 Cooling device 7 Heating unit 8 First sheet metal holding unit 9 Steel plate alignment heating device 10 Mold 11 External mold 14 Laminated steel plate 15 Upper mold drive device 16 Steel plate material 17 Steel plate 19 Lower mold drive device 20 External mold 21 External punch 24 External upper mold pulley 28 Bearing member 29 External upper mold outer peripheral surface 30 External lower mold 33 External lower mold pulley 35 Cooling guide path 36 Steel plate Guide path 38 External lower mold outer peripheral surface 39 Rotation failure detection hole 40 Nozzle unit 41 Nozzle 42 Nozzle on-off valve 43 Nozzle holder 44 Nozzle elastic member 45 Adhesive 46 Adhesive storage 47 Supply pipe 48 Rotary joint 49 Nozzle slide cam 50 Rotation drive pulley 51 Rotation drive source 52 Drive belt 53 Drive shaft support 54 Rotation drive control device 55 Rotation drive shaft 56 Upper drive shaft 58 Lower drive shaft 61 Inner cooling unit 62 Outer cooling unit 63 Outer cooling unit fixing base 64 Cooling Agent circulation part 65 Coolant supply part 66 First opening 67 Second opening 68 Cooling pipe 69 Coolant cooling part 71 Heating movable part holder 72 Heating movable part 73 Movable elastic member 74 Heating part 76 Connecting hole 78 Width 79 Radius 81 Steel plate holding block 82 Steel plate holding movable part 83 Steel plate holding elastic member 84 Heating device pulley 85 Connecting pin 86 End part 87 Gap 88 Steel plate holding block 89 Contact convex part 90 Control device 91 Lower type drive pulley 92 Lower type drive belt 93 Heating device drive Part 94 Heating device drive pulley 95 Heating device drive belt 96 Drain gutter (first drain gutter)
97 Drain gutter (second drain gutter)
100 Laminated steel plate manufacturing equipment 108 Second steel plate holding unit 123 Rotation defect detection pin 124 Punch slide cam 125 Detection pin Elastic member 127 Upper mold opening 135 Opening and closing valve hole 136 Lower mold opening 140 Nozzle discharge part 142 First nozzle On-off valve 143 First nozzle valve elastic member 144 Second nozzle on-off valve 145 Second nozzle valve elastic member 146 Third nozzle on-off valve 147 Second adhesive flow path 148 First adhesive flow path 149 Gap 150 Third adhesive flow Road 151 Upper type drive pulley 152 Upper type drive belt 154 Upper type drive pulley holding part 156 Drive shaft elastic member 159 Plate 160 Balance correction part 161 Balance correction table 164 Balance elastic member 168 Balance correction table 200 Laminated steel plate manufacturing equipment 221 Cam part 222 Tip 223 Punch cam concave 225 Lower end surface 228 External punch convex part 241 Nozzle engaging part 244 Nozzle cam engaging surface 245 Nozzle cam concave 247 Upper end surface 248 First convex shape part 249 First concave shape part 252 Upper type drive pulley 255 Nozzle gap 256 Drive shaft elastic member 257 Gap 258 Second convex shape part 259 Second concave shape part 260 Coolant 263 First coolant reservoir 264 Second coolant reservoir 265 Gap 266 Lower side surface 267 Upper side surface 270 Plate 300 Laminated steel plate manufacturing equipment 350 holes 400 Laminated steel plate manufacturing equipment 500 Laminated steel plate manufacturing equipment 510 Rotation drive device 512 Rotation drive shaft 520 Adhesive coating device 600 Laminated steel plate manufacturing equipment C1 First center axis θ Predetermined angle

Claims (24)

In a manufacturing apparatus that manufactures laminated steel sheets by laminating steel sheets that are punched into a predetermined shape from a steel sheet material.
In order to punch the steel plate from the steel plate material, a mold consisting of a pair of upper and lower dies is provided.
The upper mold and the lower mold are relatively movable along the vertical direction, and are relatively movable.
The mold includes an outer die composed of an outer die and an outer die for punching the outer shape of the steel plate.
The outer die is rotatable around a first central axis extending vertically with respect to the upper die.
The outer shape lower mold is rotatable about the first central axis with respect to the lower mold.
When the steel plate is punched and formed, each time the steel plate is punched out or a predetermined number of the steel plates are punched out, the outer die and the outer die are rotated by a predetermined angle to each other. The relative positions are matched, and
A laminated steel sheet manufacturing apparatus for punching the steel sheet from the steel sheet material and laminating the steel sheets to form the laminated steel sheet. At least a part of the outer periphery of the member constituting the outer peripheral mold forms a substantially cylindrical outer peripheral surface of the outer peripheral mold centered on the first central axis.
In the upper mold, a portion accommodating the outer mold forms a cylindrical upper mold opening.
A portion facing the outer mold and the upper mold, including between the outer peripheral surface of the outer mold and the opening of the upper mold, is provided with a bearing member.
The outer die can be slidably rotated with respect to the upper die via the bearing member.
In the member constituting the outer peripheral mold, at least a part of the outer peripheral surface forms a substantially cylindrical outer peripheral surface of the outer peripheral mold centered on the first central axis.
In the lower mold, a portion accommodating the outer shape lower mold forms a cylindrical lower mold opening.
The portion where the outer shape lower mold and the lower mold face each other, including between the outer peripheral surface of the outer shape lower mold and the lower mold opening, includes the bearing member.
The laminated steel sheet manufacturing apparatus according to claim 1, wherein the outer shape lower die is slidable and rotatable with respect to the lower die via the bearing member. A rotary drive device for rotationally driving the outer die and the outer die is provided.
The rotary drive device is
The upper mold drive device that rotates the upper mold on the outer shape, and
The lower mold driving device that rotates the outer outer mold and
A rotary drive source for rotationally driving the upper mold drive device and the lower mold drive device,
A rotation drive control device for controlling the drive of the rotation drive source is provided.
The rotation drive control device is
The rotary drive source is driven in a state where the upper mold and the lower mold are separated from each other in the vertical direction.
Further, the rotation drive source is rotated and controlled so that the outer die and the outer die are rotated by the predetermined angle each time one of the steel plates is punched out or each time a predetermined number of the steel plates are punched out. The laminated steel sheet manufacturing apparatus according to claim 1 or 2. The rotary drive device is
A rotary drive shaft that transmits the rotation of the rotary drive source to the outer die and the outer die,
A drive shaft support base that supports the rotary drive shaft and
A drive shaft elastic member that applies an elastic force downward in the vertical direction to the rotary drive shaft from either the drive shaft support base or the upper mold is provided.
The rotary drive shaft is an upper mold drive shaft that is on the upper side in the vertical direction and engages with the upper mold drive device, and a lower mold drive that is on the lower side in the vertical direction and engages with the lower mold drive device. It consists of a shaft, and the upper type drive shaft and the lower type drive shaft are engaged with each other in the rotation direction.
The upper mold drive device is connected to the upper mold, and moves in the same direction as the upper mold moves along the vertical direction.
The upper mold drive device and the upper mold drive shaft are relatively movable in a direction along the vertical direction, and are relatively movable.
In a state where the upper mold and the lower mold are separated in the vertical direction,
The drive shaft elastic member presses the upper mold drive shaft against the upper mold drive device in a direction along the vertical direction to form a bonded state.
When the rotary drive source is driven, the lower mold drive shaft rotates to rotate the lower mold drive device, and the rotation is transmitted to the outer mold lower mold.
The lower mold drive shaft transmits rotation to the upper mold drive shaft, and the upper mold drive device transmits rotation to the outer mold.
When the upper mold is pressed in the direction along the vertical direction with respect to the lower mold, the upper mold drive shaft and the upper mold drive device are separated from each other in the direction along the vertical direction to release the bonded state. The laminated steel plate manufacturing apparatus according to claim 3. The lower mold drive device is
A drive belt that transmits the rotation of the rotary drive source to the lower mold drive device,
A rotary drive pulley that passively rotates the drive belt and rotates synchronously with the lower drive shaft.
A lower drive pulley that rotates synchronously with the lower drive shaft,
A lower die drive belt that transmits the rotation of the lower die drive pulley to the outer die lower die is provided.
The upper mold drive device is
An upper mold drive pulley that rotates synchronously by engaging with the upper mold drive shaft,
The upper mold drive pulley holding portion for holding the upper mold drive pulley and the upper mold drive pulley holding portion,
It is provided with an upper die drive belt that transmits the rotation of the upper die drive pulley to the outer die.
The outer die is
It is provided with an outer outer die pulley that follows the drive of the lower die drive belt, and rotates integrally with the rotation of the outer die lower die pulley.
The external mold is
It is equipped with an external upper die pulley that follows the drive of the upper die drive belt.
It rotates integrally with the rotation of the outer shape pulley,
The upper mold drive pulley holding portion is directly or indirectly connected to the upper mold, and moves as the upper mold moves along the vertical direction.
The upper mold drive pulley and the upper mold drive shaft are relatively movable in the direction along the vertical direction, and are relatively movable.
In a state where the upper mold and the lower mold are separated in the vertical direction,
The drive shaft elastic member presses the upper mold drive shaft against the upper mold drive pulley in a direction along the vertical direction to form a bonded state.
When the rotary drive source rotates, the drive belt is driven to rotate the rotary drive pulley to rotate the lower drive shaft, and the lower drive pulley is rotated to rotate the lower drive pulley via the lower drive belt. Transmission of rotation to the outer mold,
The lower die drive shaft transmits rotation to the upper die drive shaft, and the rotation is transmitted to the outer die on the outer die via the upper die drive belt.
When the upper mold is pressed in the direction along the vertical direction with respect to the lower mold, the upper mold drive shaft and the upper mold drive pulley are separated from each other in the direction along the vertical direction to release the joined state. The laminated steel sheet manufacturing apparatus according to claim 4. The outer shape mold and the outer shape lower mold are provided with a balance correction unit at a position symmetrical to the rotation drive device with respect to the first central axis.
The balance correction unit includes a balance correction table on the lower mold, and a balance elastic member between the balance correction table and the upper mold.
The laminated steel sheet manufacturing apparatus according to any one of claims 3 to 5, wherein the balanced elastic member prevents the upper mold from being tilted in the rotary drive device. The upper mold is provided with an adhesive application device for applying an adhesive to the steel sheet including the steel sheet material.
The adhesive application device is
The nozzle unit that discharges the adhesive and
An adhesive storage unit that stores the adhesive and
A supply pipe for supplying the adhesive from the adhesive storage unit to the nozzle unit is provided.
The nozzle unit is
A nozzle forming a nozzle discharge portion for discharging the adhesive onto the steel sheet,
When the side of the adhesive storage portion is the upstream side and the side of the nozzle unit is the downstream side, the adhesive is selectively supplied from the upstream side to the downstream side inside the nozzle. Nozzle on-off valve and
A nozzle holder that supports the nozzle so as to be movable in the vertical direction is provided.
The nozzle unit moves in the same direction as the upper mold moves in the direction along the vertical direction.
The first state in which the nozzle is located on the downstream side of the nozzle holder relative to the nozzle holder.
It is possible to form a second state in which the nozzle is located relatively upstream of the nozzle holder.
The nozzle is
When the upper mold moves downward in the direction along the vertical direction, the nozzle ejection portion comes into contact with the steel plate containing the steel plate material in the first state.
Further, when the upper mold moves downward in a direction relatively along the vertical direction, the nozzle forms the second state, the nozzle on-off valve opens, and the adhesive is inside the nozzle unit. Forming a flow path of
When the upper mold moves from the lower side in the vertical direction to the upper side, the nozzle moves to the downstream side relative to the nozzle holder to form the first state. The laminated steel sheet manufacturing apparatus according to any one of claims 3 to 6, wherein the nozzle on-off valve is closed to block the flow path of the adhesive inside the nozzle unit. The nozzle on-off valve includes a first nozzle on-off valve, a first nozzle valve elastic member, a second nozzle on-off valve, a second nozzle valve elastic member, and a third nozzle on-off valve.
The nozzle holder forms a first adhesive flow path extending in the vertical direction inside.
The nozzle forms a second adhesive flow path extending in the vertical direction inside and a third adhesive flow path connected to the nozzle ejection portion.
In the first state,
The first nozzle on-off valve contacts the nozzle holder and closes the first adhesive flow path by the elastic force of the first nozzle valve elastic member.
The second nozzle on-off valve closes the second adhesive flow path by the elastic force of the second nozzle valve elastic member.
The third nozzle on-off valve is closed to block the third adhesive flow path, and the third nozzle on-off valve is closed.
In the second state,
The nozzle moves relatively upstream of the first nozzle on-off valve against the elastic force of the first nozzle valve elastic member, and a gap is created between the nozzle and the first nozzle on-off valve. By opening the first adhesive flow path, the adhesive flows into the second adhesive flow path, and the adhesive flows into the second adhesive flow path.
The second nozzle on-off valve moves to the downstream side relative to the nozzle due to the pressure of the adhesive to open the second adhesive flow path.
The laminated steel sheet manufacturing apparatus according to claim 7, wherein the third adhesive flow path is opened by expanding the third nozzle on-off valve by the pressure of the adhesive, and the adhesive is supplied to the nozzle ejection portion. .. The third nozzle on-off valve is made of a thin film member having elastic force.
It is provided with an on-off valve hole in a portion corresponding to the position of the center of the third adhesive flow path, which is smaller than the horizontal width in the third adhesive flow path when opened.
The on-off valve hole is
In the first state, which is not subject to the pressure of the adhesive, the adhesive is closed and the adhesive is stopped from flowing from the second adhesive flow path to the third adhesive flow path.
The eighth aspect of claim 8, wherein in the second state, which is a state of receiving pressure from the adhesive, the adhesive flows from the second adhesive flow path to the third adhesive flow path in an open state. Laminated steel sheet manufacturing equipment. The nozzle unit is
It is inside the outer mold, is rotatable around the first central axis in synchronization with the outer mold, and is movable in the direction along the vertical direction.
When the mold moves on the outer shape in the direction along the vertical direction, it moves in conjunction with it.
When the outer mold moves downward in the direction along the vertical direction and the lower end portion comes into contact with the steel plate containing the steel plate material, the outer mold and the nozzle unit are placed in the vertical direction between the outer mold and the nozzle unit. Has a nozzle gap,
The laminated steel sheet manufacturing apparatus according to any one of claims 7 to 9, wherein the nozzle unit is rotatably connected to the supply pipe via a rotary joint directly or indirectly. The upper mold is
A fixed punch plate that rotatably supports the mold on the outer shape,
A rotation defect detection pin that is movable in the vertical direction with respect to the fixed punch plate and has a cam portion,
A detection pin elastic member that presses the rotation failure detection pin in a direction along the vertical direction, and
A punch slide cam that comes into contact with the cam portion and can move in the horizontal direction when the rotation failure detection pin moves relatively upward is provided.
The punch slide cam has a punch cam recess on the lower side in the vertical direction.
The outer die has an outer punch convex portion that protrudes upward in the vertical direction.
The outer shape lower mold is provided with a rotation defect detection hole into which the rotation defect detection pin can be inserted.
The upper mold moves downward in the direction along the vertical direction,
When the tip of the rotation failure detection pin moves downward along the vertical direction at a position different from the position of the rotation failure detection hole and comes into contact with the upper end surface of the outer shape lower mold.
The punch slide cam engages with the cam portion of the rotation defect detection pin and moves along the horizontal direction, and the outer punch convex portion of the outer die penetrates into the punch cam recess and is in the vertical direction. Moving upward, the outer die stops moving with the lower end surface of the outer die and the upper end surface of the lower die separated from each other, and the nozzle ejection portion of the nozzle unit. Is in contact with the steel plate containing the steel plate material.
Further, when the upper mold moves upward in the direction along the vertical direction, the outer mold moves upward, and the nozzle unit moves from the outer mold to the nozzle unit. The laminated steel sheet manufacturing apparatus according to claim 10, wherein the nozzle ejection portion maintains a state of being in contact with the steel sheet containing the steel sheet material until the nozzle gap disappears. The adhesive application device includes a nozzle elastic member between the external mold and the nozzle holder in the vertical direction.
The upper mold is provided with a nozzle slide cam that is movable in the horizontal direction and has a nozzle cam recess on the lower side in the vertical direction.
The nozzle slide cam has a nozzle cam engaging surface that partially forms the nozzle cam recess.
The nozzle unit includes a nozzle engaging portion that engages with the nozzle slide cam.
When the upper die moves downward in the direction along the vertical direction and the steel plate is punched out by the outer die and the outer die.
A state in which the nozzle engaging portion and the nozzle cam engaging surface other than the nozzle cam recess are engaged and the nozzle discharging portion is in close proximity to the steel plate containing the steel plate material.
The laminated steel plate according to any one of claims 7 to 11, wherein the nozzle engaging portion and the nozzle cam recess are engaged with each other, and the nozzle discharging portion is separated from the steel plate containing the steel plate material. manufacturing device. The adhesive is thermosetting and is thermosetting.
The outer shape lower die is provided with a steel plate guide path extending downward in a direction along the vertical direction with the first central axis as the center.
The steel plate guide path guides the steel plate punched by the outer die and the outer die to the lower side in the vertical direction.
A steel plate aligned heating device that forms a part of the steel plate guide path and heats the steel plate is provided below the outer die in the vertical direction.
At least a part of the steel sheet alignment heating device contacts and heats the steel sheet, and aligns the steel sheets in the stacking direction in the steel sheet guide path.
The adhesive applied to the steel sheet by the adhesive coating device is cured by heating of the steel sheet alignment heating device and adheres to each other with the steel sheets adjacent to at least one of the vertical vertical directions to form a laminated steel sheet. The laminated steel sheet manufacturing apparatus according to any one of claims 7 to 12. The steel sheet aligned heating device includes a heating unit for heating the steel sheet or the laminated steel sheet.
The heating unit is
A plurality of heating movable portions arranged so as to surround the steel plate guide path in a direction intersecting the steel plate guide path and movable toward the first central axis.
The heating part that heats the heating movable part and
A movable elastic member that moves the heated movable portion in a direction intersecting the first central axis,
A heated movable portion holder that guides the movement of the heated movable portion and is rotatable around the first central axis together with the heated movable portion is provided.
The heated movable part holder is separated from the outer shape lower mold in the vertical direction.
The heated movable portion is heated by pressure contacting the outer peripheral portion of the steel sheet from a plurality of directions by the elastic force of the movable elastic member, and further aligns the steel sheet with respect to the steel plate guide path. Item 13. The laminated steel sheet manufacturing apparatus according to Item 13. The lower mold drive device in the rotary drive device is
A heating device drive unit that is rotationally driven by the rotary drive source is provided.
The heating device drive unit includes a heating device drive pulley and a heating device drive belt that transmits the rotation of the heating device drive pulley to the steel plate aligned heating device.
The steel plate aligned heating device comprises a heating device pulley that is rotatable around the first central axis and passively rotates the heating device drive belt.
The 14th aspect of the present invention, wherein the heating device driving unit is driven in synchronization with the lower mold driving device to rotate the heating movable portion holder including the heating movable portion in synchronization with the outer shape lower mold. Laminated steel sheet manufacturing equipment. The steel plate alignment heating device further includes a first steel plate holding unit that holds the steel plate and restricts its fall on the lower side in the vertical direction of the heating unit.
The heated movable portion holder includes a connecting hole that engages with the first steel plate holding unit.
The first steel plate holding unit is
A steel plate holding block that forms part of the steel plate guide and is rotatable around the first central axis.
A steel plate holding movable portion that can move in a direction intersecting the first central axis with respect to the steel plate holding block.
A steel plate holding elastic member that applies an elastic force to the steel plate holding movable portion in the direction toward the first central axis.
A connecting pin that engages with the connecting hole is provided.
The steel plate holding movable portion presses the outer peripheral portion of the laminated steel plate by the pressure of the steel plate holding elastic member.
The heating device pulley is formed on the steel plate holding block, and is formed on the steel plate holding block.
When the rotary drive source is driven, the heating device pulley passively rotates the steel plate holding block and the steel plate holding movable portion, and further heats the steel plate through the connecting pin and the connecting hole. The laminated steel sheet manufacturing apparatus according to claim 15, wherein the movable portion holder is rotated. The steel plate alignment heating device further includes a second steel plate holding unit that holds the steel plate and restricts its fall on the lower side in the vertical direction of the heating unit.
The heated movable portion holder includes a connecting hole that engages with the second steel plate holding unit.
The second steel plate holding unit is
A steel plate holding block that forms part of the steel plate guide and is rotatable around the first central axis.
In the steel plate holding block, a contact convex portion that comes into contact with the steel plate or the laminated steel plate,
A connecting pin that engages with the connecting hole is provided.
The contact convex portion is in contact with and held by the outer peripheral portion of the laminated steel sheet.
The heating device pulley is formed on the steel plate holding block, and is formed on the steel plate holding block.
When the rotary drive source is driven, the heating device pulley passively rotates the steel plate holding block, and further rotates the heating movable portion holder via the connecting pin and the connecting hole. The laminated steel sheet manufacturing apparatus according to claim 15. A part of the lower end portion in the vertical direction of the outer shape lower mold and a part of the upper end part of the heating movable part holder of the steel plate alignment heating device form a first convex shape portion in the outer shape lower mold. A first concave shape portion corresponding to the first convex shape portion is formed on the heating movable portion holder, and the first concave shape portion is formed.
A part of the lower end portion in the vertical direction of the heated movable portion holder and a part of the upper end portion of the steel plate holding block form a second convex shape portion in the steel plate holding block, and the heated movable portion holder has the first portion. A second concave shape corresponding to the biconvex shape is formed,
The outer shape lower mold and the heating movable portion holder are in contact with each other only in the direction in which the first convex shape portion and the first concave shape portion intersect with the first central axis, and are engaged with each other. In the vertical direction, the lower side surface forming the lower end of the outer shape lower mold and the upper side surface forming the upper end of the heating movable portion holder are separated from each other, and the portion of the steel plate guide path formed by the outer shape lower mold and the said. The center position with the part formed by the heated movable part holder coincides with the first central axis.
The heated movable portion holder and the steel plate holding block are in contact with each other in contact with the second convex shaped portion and the second concave shaped portion, and the portion of the steel plate guide path formed by the heated movable portion holder. The laminated steel sheet manufacturing apparatus according to claim 16 or 17, wherein the center position of the steel sheet holding block and the portion formed by the steel sheet holding block coincides with the first central axis. There are a plurality of connecting pins on the same circumference centered on the first central axis.
The connecting hole is
Formed corresponding to the position of the connecting pin,
The length in the direction intersecting the first central axis is equal to or larger than the diameter of the connecting pin.
The relationship between the width in the circumferential direction about the first central axis and the diameter of the connecting pin is that the width in the circumferential direction is equal to or larger than the diameter of the connecting pin, and the gap between them is It is a relationship of the degree of fine turning in the gap fitting,
When the heating movable portion heats the heating movable portion and the heat movable portion holder thermally expands,
The connecting hole engages with the connecting pin in a direction intersecting the first central axis, at an end on the side of the first central axis, and in a circumferential direction about the first central axis.
The steel plate holding block and the heated movable portion holder move with each other in a direction intersecting the first central axis and a circumferential direction centered on the first central axis with the first central axis as the center. The laminated steel sheet manufacturing apparatus according to any one of claims 16 to 18. The connecting hole is
In the direction intersecting the first central axis
16. Claim 16 that the end portion on the side of the first central axis is an arc shape formed with a radius equal to or larger than the radius of the connecting pin, and the width in the circumferential direction becomes wider as the distance from the first central axis increases. The laminated steel sheet manufacturing apparatus according to any one of 19 to 19. The lower mold is provided with a cooling device above the steel plate aligned heating device in the vertical direction.
The cooling device is
A cooling guide path that forms a part of the steel plate guide path and is integrally formed with or connected to the outer shape lower die and rotates synchronously with the outer shape lower die.
An inner cooling unit that is fixed to the outer peripheral side of the cooling guide path and rotates synchronously with the outer mold.
An outer cooling unit on the outer peripheral side of the inner cooling unit that is directly or indirectly fixed to the lower mold.
A coolant circulating portion formed between the inner cooling portion and the outer cooling portion,
A cooling agent supply unit for supplying a cooling agent to the cooling agent circulation unit is provided.
The laminated steel sheet manufacturing apparatus according to any one of claims 13 to 20, wherein the coolant can be circulated on the outer periphery of the inner cooling unit as the inner cooling unit rotates. The cooling device further
The outer cooling portion is provided with a first opening and a drain gutter.
An outer cooling unit fixing base for directly or indirectly fixing to the lower mold is provided.
The outer cooling unit is fixed to the outer cooling unit fixing base, and the outer cooling unit is fixed to the outer cooling unit fixing base.
The outer cooling unit fixing base forms a second opening, and the outer cooling unit fixing base forms a second opening.
The coolant circulating portion forms a closed space except for the first opening and the drain gutter.
The cooling agent supply unit includes a cooling agent cooling unit and at least two cooling pipes connected to the cooling agent cooling unit to supply the cooling agent.
At least one of the cooling pipes is passed through the first opening and connected to the cooling agent circulation portion, and the other cooling pipe is passed through the second opening and connected to the cooling agent circulation portion.
The cooling agent whose temperature has risen by cooling the inner cooling portion in contact with the cooling guide path is cooled by the cooling agent cooling portion from the drain trough through the second opening, and further cooled. It can be circulated by supplying it to the coolant circulation part via a pipe.
The laminated steel sheet manufacturing apparatus according to claim 21, wherein the coolant can be circulated on the outer periphery of the inner cooling unit. The lower mold is
A gap larger than the gap between the inner cooling part and the outer cooling part in the cooling agent circulation part is formed in the circumferential direction by connecting to the cooling agent circulation part at the upper end portion in the vertical direction of the inner cooling part. With a groove-shaped first coolant reservoir,
In the outer cooling unit fixing base, a gap larger than the gap between the inner cooling unit and the outer cooling unit, which is below the vertical cooling unit of the inner cooling unit, is continuous with the cooling agent circulation unit, and is larger than the gap between the inner cooling unit and the outer cooling unit. The laminated steel sheet manufacturing apparatus according to claim 22, further comprising a groove-shaped second coolant reservoir. In a manufacturing method for manufacturing a laminated steel sheet by laminating steel sheets punched into a predetermined shape from a steel sheet material.
A pair consisting of an upper die including an outer die and a lower die including an outer lower die, which are paired to punch the steel plate from the steel plate material,
A rotary drive device that rotationally drives the outer die and the outer die,
An adhesive application device for applying an adhesive to the steel sheet including the steel sheet material in the upper mold.
In the outer die, the steel plate guide path extending downward in the direction along the vertical direction,
A steel plate alignment heating device that heats the steel plate in the steel plate guide path on the lower side in the vertical direction from the outer die.
In the lower mold, a laminated steel sheet manufacturing device equipped with a cooling device above the steel sheet alignment heating device in the vertical direction was used.
The first step of moving the upper die to the lower side in the direction along the vertical direction and punching out the steel plate by the outer shape upper mold and the outer shape lower mold.
Along with the first step, a second step of applying the adhesive to the steel sheet by the adhesive coating device, and
The third step of contacting and heating the outer peripheral side surface of the punched steel sheet by the steel sheet alignment heating device to cure the adhesive applied to the steel sheet and aligning the steel sheet in the stacking direction.
The rotation drive device comprises a fourth step of rotating the outer die and the outer die by a predetermined angle.
The first step and the third step are performed every time the steel sheet is punched.
The second step is stopped every time a predetermined number of steel sheets are punched out, and the second step is stopped.
The fourth step is a laminated steel sheet manufacturing method performed every time one sheet of the steel sheet is punched out or every time a predetermined number of the steel sheets are punched out.

Images