JP7138899B2 - Laminated steel plate manufacturing equipment - Google Patents

Description

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

2. Description of the Related Art Conventionally, there have been various proposals for adhesive coating devices in devices for manufacturing laminated steel plates (iron cores) that constitute armatures of rotating electric machine devices. For example, the outline according to Patent Document 1 is as follows. A manufacturing apparatus for laminated steel plates includes a progressive die device for punching steel plates from intermittently transferred hoop materials using an upper die and a lower die. An adhesive application device is provided in the lower mold for applying an adhesive to a corresponding portion of the lower surface of the hoop material. The adhesive application device includes an adhesive discharge section having a discharge hole for discharging the adhesive toward the adhesive coating surface, and an adhesive supply section for constantly supplying the adhesive to the adhesive discharge section at a predetermined pressure. have. In this configuration, the adhesive is transferred to the hoop material when the upper mold is lowered and the stripper plate abuts the hoop material on the upper surface of the lower mold.

According to this, the adhesive application device has an adhesive supply unit that always supplies adhesive at a predetermined pressure, and the adhesive is transferred to the hoop material when the upper mold is lowered, so that the adhesive can be used to transfer the adhesive to the steel plate. It is possible to manufacture a laminated steel plate with the

JP 2009-124828 A

However, in the conventional adhesive application device, the adhesive is always supplied at a predetermined pressure from the adhesive discharge section. The adhesive is applied when the adhesive applicator comes into contact with the hoop or steel plate. That is, when the upper die is lowered and comes into contact with the hoop material or the steel plate, the adhesive is applied. Therefore, the conventional adhesive applicator cannot be controlled to apply a fixed amount of adhesive, and there is a problem that the adhesive continues to overflow the adhesive discharge part, the hoop material, and the steel plate, and the contamination by the adhesive spreads.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated steel plate manufacturing apparatus equipped with an adhesive application device capable of forming a state in which adhesive is discharged and a state in which adhesive is not discharged, in order to solve the conventional problems.

A laminated steel plate manufacturing apparatus according to an aspect of the present invention is a manufacturing apparatus for manufacturing a laminated steel plate (14) by stacking a steel plate (17) punched into a predetermined shape from a steel plate material. For punching, a mold (10) consisting of an upper mold (2) and a lower mold (3) which are paired is provided, and the upper mold and the lower mold move relatively along the vertical direction. an adhesive application device (4) for applying an adhesive (45) to the steel plate including the steel plate material to at least one of the upper mold and the lower mold; Equipped with an operating member (210, 2, 513) for operating the device, the adhesive applying device includes a nozzle unit (40) for discharging the adhesive and an adhesive reservoir (46) for storing the adhesive. , a supply pipe (47) for supplying the adhesive from the adhesive reservoir to the nozzle unit, the nozzle unit forming a nozzle discharge part (140) for discharging the adhesive onto the steel plate ( 41), and when the adhesive reservoir side is the upstream side and the nozzle unit side is the downstream side, a and a nozzle holder (43) that supports the nozzle movably in the vertical direction. Formable into a first state in which the nozzle is positioned downstream relative to the holder and a second state in which the nozzle is positioned upstream relative to the nozzle holder, the nozzle comprising: When the operating member operates in one direction, the nozzle discharge portion contacts the steel plate including the steel plate material in the first state in which the nozzle is positioned on the downstream side relative to the nozzle holder, and When the operating member is actuated in one direction, the nozzle moves to the upstream side relative to the nozzle holder to form the second state, the nozzle opening/closing valve opens, and the inside of the nozzle unit When the actuating member operates in the other direction, it moves to the downstream side relative to the nozzle holder to form the first state, and the nozzle opening/closing valve is closed. to block the flow path of the adhesive inside the nozzle unit.

According to this, the adhesive applying device provided in the laminated steel plate manufacturing apparatus can be placed in the first state in which the nozzle is positioned relatively downstream with respect to the nozzle holder and in the first state in which the nozzle is positioned relatively downstream with respect to the nozzle holder by the operation of the operating member. and a second state located on the upstream side. The nozzle opening/closing 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 adhesive is discharged from the nozzle discharge section and a state in which the adhesive is not discharged. Therefore, it is possible to control the timing and amount of application of the adhesive, and to apply a fixed amount of adhesive.

Further, in the laminated steel plate manufacturing apparatus, when the adhesive applying device is in the upper mold, the operating member is movable in the upper mold or in a horizontal direction provided for the upper mold. an actuating slide cam (513), wherein the actuating member is the actuating slide cam movable in a horizontal direction provided to the lower mold when the adhesive applicator is in the lower mold; When the adhesive application device is located in the upper mold and the operating member is the upper mold, the adhesive application device moves along the vertical direction of the upper mold. The first state and the second state are formed, and when the actuating member is the actuating slide cam, the actuating slide cam is moved in a horizontal direction to achieve the first state and the second state. may be formed.

In this case, when the adhesive application device is in the upper mold and when it is in the lower mold, the operating members corresponding to each are provided, so the first state and the second state can be formed in either case. is. Therefore, the adhesive application device can manufacture laminated steel sheets by applying adhesive to steel sheets including steel sheet materials, regardless of whether the adhesive coating apparatus is installed in the upper mold or the lower mold.

Further, in the laminated steel plate manufacturing apparatus, the nozzle opening/closing valve includes a first nozzle opening/closing valve (142), a first nozzle valve elastic member (143), a second nozzle opening/closing valve (144), and a second nozzle valve. It consists of an elastic member (145) and a third nozzle opening/closing valve (146). A second adhesive flow path (147) extending in a vertical direction and a third adhesive flow path (150) connected to the nozzle discharge portion are formed, and in the first state, the first nozzle opening/closing valve contacts the nozzle holder and closes the first adhesive channel by the elastic force of the first nozzle valve elastic member, and the second nozzle opening/closing valve is closed by the elastic force of the second nozzle valve elastic member. , the second adhesive channel is blocked, the third nozzle on-off valve is closed to block the third adhesive channel, and in the second state, the nozzle is connected to the first nozzle valve elastic member By moving toward the upstream side relative to the first nozzle opening/closing valve against elastic force and creating a gap between the adhesive and the first nozzle opening/closing valve to open the first adhesive flow path, The adhesive flows into the second adhesive flow path, and the pressure of the adhesive moves the second nozzle on-off valve relative to the nozzle to the downstream side to cause the second adhesive flow. The third adhesive flow path may be opened by opening the passage and further expanding the third nozzle opening/closing valve by the pressure of the adhesive, thereby supplying the adhesive to the nozzle ejection portion.

In this case, the nozzle holder forms a first adhesive channel, and the nozzle forms a second adhesive channel and a third adhesive channel leading to the nozzle outlet. 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, the state in which the adhesive is applied and the state in which the discharge of the adhesive is stopped can be established more reliably.

Further, in the laminated steel plate manufacturing apparatus, the third nozzle on-off valve is made of a thin film member having elasticity, and is located in a portion corresponding to the center position of the third adhesive flow path, and when opened, An on-off valve hole (346) smaller than the width in the horizontal direction of the third adhesive channel is provided, and the on-off valve hole is closed in the first state in which the pressure from the adhesive is not applied. As a result, the adhesive stops flowing from the second adhesive channel to the third adhesive channel, and in the second state in which pressure is applied by the adhesive, the open state and the Thus, the adhesive may flow from the second adhesive channel to the third adhesive channel.

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

Further, in the laminated steel plate manufacturing apparatus, the adhesive coating device is disposed between the upper mold or the lower mold of the molds on which the adhesive coating device is installed and the nozzle unit in the vertical direction. The upper mold or the lower mold, which is provided with a nozzle elastic member (44) and on which the adhesive coating device is installed, is movable in the horizontal direction and extends downward in the vertical direction to form a nozzle cam concave portion (245). The nozzle slide cam has a nozzle cam engaging surface (244) forming the nozzle cam recess in part thereof, and the nozzle unit includes the nozzle slide cam and A nozzle engaging portion (241) to be engaged is provided, and when the upper mold moves downward in the vertical direction, the nozzle engaging portion engages with the nozzle cam engaging surface other than the nozzle cam concave portion. In this state, the nozzle engaging portion and the nozzle cam recess are engaged with each other, and the nozzle discharge portion is separated from the steel plate containing the steel plate material. It may be selectable.

In this case, when the upper die moves downward in the vertical direction and the steel plate is punched out by the outer shape upper die and the outer shape lower die, the nozzle engaging portion engages with the nozzle cam engaging surface or the nozzle cam concave portion. It is possible to select the position of the nozzle discharge part depending on whether it is engaged with. Therefore, when the upper die moves downward in the vertical direction to punch out the outer shape of the steel sheet, it is possible to select whether to apply the adhesive to the steel sheet or to stop the application.

Further, in the laminated steel plate manufacturing apparatus, the mold includes a contour mold (11) composed of an contour upper mold (20) and a contour lower mold (30) for punching the contour of the steel plate, and the adhesive is thermosetting, the outer mold has a steel plate guide path (36) centered on the first central axis (C1) and extending downward in the vertical direction, and the steel plate guide path is , guiding the steel plate punched by the outer shape upper mold and the outer shape lower mold downward in the direction along the vertical direction, forming a part of the steel plate guide path, and A steel plate aligning and heating device (9) for heating the steel plate is provided on the lower side in the vertical direction, and at least a part of the steel plate aligning and heating device heats the steel plate by contacting the steel plate, and the steel plate in the steel plate guide path. are aligned in the stacking direction, and the adhesive applied to the steel plates by the adhesive applicator is cured by heating by the steel plate aligning and heating device, and adheres to the steel plates adjacent in at least one of the vertical directions. to form a laminated steel plate (14).

In this case, the steel plate aligning and heating device can have a function of heating the steel plates to harden the adhesive by contacting the steel plates and a function of aligning the steel plates in the stacking direction in the steel plate guide path. Therefore, the steel plate aligning and heating apparatus can bond the steel plates while aligning them in the stacking direction to form a laminated steel plate.

Further, in the laminated steel plate manufacturing apparatus, the steel plate aligning and heating device includes a heating unit (7) for heating the laminated steel plate, and the heating unit heats the steel plate guide in a direction intersecting the steel plate guide path. a plurality of movable heating parts (72) arranged to surround the path and movable toward the first central axis; a heating part (74) for heating the movable heating parts; It comprises a movable elastic member (73) that moves in a direction intersecting one central axis, and a heating movable part holder (71) that guides the movement of the heating movable part, and the heating movable part holder is provided with the outline lower mold. are spaced apart in the vertical direction, and the heating movable part heats the steel plate by coming into contact with the outer peripheral part of the steel plate from a plurality of directions, and further adjusts the position of the steel plate with respect to the steel plate guide path.

In this case, since the steel plate aligning and heating device has a plurality of movable heating parts arranged so as to surround the steel plate guide path, the steel plates can be uniformly heated. Therefore, the adhesive in the laminated steel plate can be cured evenly and the adhesive force can be strengthened. In addition, since the heating movable part holder is separated from the outer shape lower mold in the vertical direction, heat transfer to the outer shape lower mold can be reduced.

Further, in the laminated steel plate manufacturing apparatus, the steel plate aligning and heating device further includes a first steel plate holding unit (8) for adjusting the position of the steel plate below the heating unit in the vertical direction, and the heating movable The part holder comprises a connecting hole (76) for engaging said first steel plate holding unit, said first steel plate holding unit comprising a steel plate holding block (81) forming part of said steel plate guideway, said steel plate A steel plate holding movable part (82) movable in a direction crossing the first central axis with respect to the holding block, and applying an elastic force to the steel plate holding movable part in a direction toward the first central axis. Equipped with a steel plate holding elastic member (83) and a connecting pin (85) that engages with the connecting hole, the steel plate holding movable portion presses and holds the outer peripheral portion of the laminated steel plate by the pressure of the steel plate holding elastic member. You may

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 heater pulley formed in the steel plate holding block rotates the movable heating part holder through the connecting pin and the connecting hole, the movable part for holding the steel plate and the movable heating part holder can be rotated synchronously.

Further, in the laminated steel plate manufacturing apparatus, the steel plate aligning and heating device further includes a second steel plate holding unit (108) that holds the steel plate and regulates the fall of the steel plate below the heating unit in the vertical direction, Said heating movable part holder has a connecting hole (76) for engaging said second steel plate holding unit, said second steel plate holding unit being connected to a steel plate holding block (88) forming part of said steel plate guideway. , the steel plate holding block includes a contact projection (89) that contacts the steel plate or the laminated steel plate, and a connection pin (85) that engages with the connection hole, wherein the contact projection is attached to the laminated steel plate. may be held in contact with the outer periphery of the

In this case, since the contact protrusions of the steel plate holding block of the second steel plate holding unit contact and hold 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 heater pulley formed in the steel plate holding block rotates the movable heating part holder through the connecting pin and the connecting hole, the movable part for holding the steel plate and the movable heating part holder can be rotated synchronously.

Further, in the laminated steel plate manufacturing apparatus, a part of a lower end portion in the vertical direction of the outer shape lower mold and a part of an upper end portion of the heating movable part holder of the steel plate aligning and heating device are attached to the outer shape lower mold. A first convex portion (248) is formed, a first concave portion (249) corresponding to the first convex portion is formed in the heating movable portion holder, and a lower end portion of the heating movable portion holder in the vertical direction is formed. and a part of the upper end of the steel plate holding block form a second convex portion (258) on the steel plate holding block, and a second convex portion (258) on the heating movable part holder corresponding to the second convex portion. A two-concave portion (259) is formed, and the outer shape lower mold and the heating movable part holder are arranged such that the first convex portion and the first concave portion intersect the first central axis. and the lower surface (266) forming the lower end of the outer shape lower mold and the upper surface (267) forming the upper end of the heating movable part holder are spaced apart in the vertical direction, A center position between a portion of the steel plate guide path formed by the outer mold and a portion formed by the heating movable part holder coincides with the first central axis, and the heating movable part holder and the steel plate holding block means that the second convex portion and the second concave portion are in contact with each other, and the portion of the steel plate guide path formed by the heating movable portion holder and the portion formed by the steel plate holding block. may coincide with the first central axis.

In this case, the outer shape lower mold and the heating movable part holder are engaged by contacting only the first convex shape part and the first concave shape part, and form the lower end of the outer shape lower mold in the vertical direction. The side surface is separated from the upper surface forming the upper end of the heating movable part holder. The central position of the portion of the steel plate guide path formed by the outer mold and the portion formed by the heating movable part holder coincides with the first central axis. Therefore, the central positions of the steel plate guide paths of the outer shape lower mold and the heating movable part holder can be aligned. Since only the first convex portion and the first concave portion are in contact with and engaged with the lower profile mold and the heating movable part holder, the heat transfer from the heating movable part holder to the lower profile mold is limited. can be done.

Further, the movable heating part holder and the steel plate holding block are engaged by contacting the second convex part and the second concave part, and the portion of the steel plate guide path formed by the movable heating part holder and the steel plate holding block The center position of the portion formed by coincides with the first central axis. Therefore, in the vertical direction, the center positions of the steel plate guide paths leading from the lower outer mold to the steel plate holding block can be aligned.

Further, in the laminated steel plate manufacturing apparatus, a plurality of the connecting pins are arranged on the same circumference around 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 greater than the diameter of the connecting pin, and the width (78) in the circumferential direction around the first central axis and the diameter of the connecting pin The relationship is such that the width in the circumferential direction is equal to or greater than the diameter of the connecting pin, and the gap between them is a relationship of the degree of precision rolling in clearance fitting, and the heating part is the heating movable part. When the heating movable part holder thermally expands by heating the part, the connecting hole is formed with an end (86) on the first central axis side and the second The steel plate holding block and the heating movable part holder are engaged with the connecting pin both in the circumferential direction around one central axis and intersect the first central axis with the first central axis as the center. and circumferentially about said first central axis.

In this case, when the heating movable part holder thermally expands, the connecting pin engages with the connecting hole, and the direction intersecting the first central axis and the direction intersecting the first central axis about the first central axis Prevent each other from moving in the circumferential direction. Therefore, the heating movable part holder and the steel plate holding block are integrated with their center positions aligned with each other about the first central axis. maintain.

Further, in the laminated steel plate manufacturing apparatus, the end portion of the connecting hole on the side of the first central axis in the direction intersecting the first central axis is formed with a radius equal to or larger than the radius (79) of the connecting pin. The opening may have an arcuate shape, and the width in the circumferential direction increases as the distance from the first central axis increases.
In this case, when the heating movable part holder thermally expands, the connecting pin more reliably engages in the arc-shaped portion of the connecting hole, so that the central positions of the heating movable part holder and the steel plate holding block are kept aligned. .

Further, in the laminated steel plate manufacturing apparatus, the lower mold is provided with a cooling device (6) above the steel plate alignment and heating device in the vertical direction, and the cooling device forms a part of the steel plate guide path. an inner cooling section (61) fixed to the outer peripheral side of the cooling guide path; and an inner cooling section (61) fixed to the outer peripheral side of the inner cooling section and directly or indirectly fixed to the lower die. a coolant circulation section (64) formed between said inner cooling section and said outer cooling section; and a coolant supply for supplying coolant (260) to said coolant circulation section. A portion (65) may be provided, said coolant being circulating over the outer circumference of said inner cooling portion.

In this case, the cooling device forms a coolant circulation section between the inner cooling section that rotates synchronously with the outer mold and the outer cooling section that is fixed to the outer cooling section fixing base. Therefore, the coolant circulates in the coolant circulation section in the circumferential direction, so that the inner cooling section can be cooled over the entire circumferential direction. Furthermore, the lower contour mold in contact with the inner cooling section can be cooled.

Further, in the laminated steel plate manufacturing apparatus, the cooling device further includes a first opening (66) and drain troughs (96, 97) in the outer cooling part, and the lower mold directly or indirectly an outer cooling part fixing base (63) fixed to the outer cooling part fixing base (63), said outer cooling part fixing to said outer cooling part fixing base, said outer cooling part fixing base forming a second opening (67), said The coolant circulation section forms a closed space except for the first opening and the drain gutter, and the coolant supply section includes a coolant cooling section (69) and the coolant cooling section connected to the coolant cooling section (69). at least two cooling pipes (68) for supplying coolant, at least one of said cooling pipes passing through said first opening and connected to said coolant circulation part, and another of said cooling pipes passing through said first opening; The coolant, which is connected to the coolant circulation part through the second opening, cools the inner cooling part in contact with the cooling guide path and has a temperature rise, flows from the drain gutter through the second opening. The cooling agent can be circulated by reducing the temperature in the cooling agent cooling unit and supplying the cooling agent to the cooling agent circulation unit through the cooling pipe, and the cooling agent can be circulated on the outer circumference of the inner cooling unit. good.

In this case, the cooling device comprises a coolant cooling section, which cools the coolant whose temperature has risen and can be circulated through the cooling pipe to the coolant circulation section. Therefore, the cooling device can have the effect of continuously cooling the cooling guide path.

Further, in the laminated steel plate manufacturing apparatus, the lower mold is connected to the coolant circulation section at the upper end portion in the vertical direction of the inner cooling section, and is circumferentially connected to the inner cooling section in the coolant circulation section. A groove-shaped first coolant reservoir (263) having a gap larger than the gap between the outer cooling part and the outer cooling part; , a groove-like second coolant reservoir (264) continuous with the coolant circulation section and having a gap larger than the gap between the inner cooling section and the outer cooling section.

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

FIG. 2 is a cross-sectional view of the laminated steel plate manufacturing apparatus 100 taken along the transfer direction of the steel plate material 16 including the strip-shaped steel plate. FIG. 2 is a cross-sectional view showing the cross section II of FIG. 1 in the laminated steel plate manufacturing apparatus 100, showing a state in which the upper die is at the top dead center. FIG. 2 is a cross-sectional view showing the cross section II of FIG. 1 in the laminated steel plate manufacturing apparatus 100, showing a state in which the upper die is at the bottom dead center. 3 is a detailed view of the upper mold 2 (top dead center) in FIG. 2 in the laminated steel plate manufacturing apparatus 100. FIG. 4 is a detailed view of the upper die 2 (bottom dead center) in FIG. 3 in the laminated steel plate manufacturing apparatus 100. FIG. FIG. 4 is a detailed view of the outer shape lower die 30 in FIGS. 2 and 3 in the laminated steel plate manufacturing apparatus 100. FIG. FIG. 3 is a detailed view of the rotary drive device 5 (top dead center) in FIG. 2 in the laminated steel plate manufacturing apparatus 100; 4 is a detailed view of the rotary drive device 5 (bottom dead center) in FIG. 3 in the laminated steel plate manufacturing apparatus 100. FIG. FIG. 9 is a detailed view comparing the essential parts of the rotary drive device 5 in FIGS. 7 and 8 in the laminated steel plate manufacturing apparatus 100, where (a) shows a state in which the upper die 2 is at the top dead center, and (b) shows The state in which the upper die 2 is at the bottom dead center is shown. It is a figure which shows the laminated steel plate manufacturing apparatus 200, and is a figure corresponded to FIG. 3 in the laminated steel plate manufacturing apparatus 100. FIG. FIG. 11 is a detailed view illustrating the periphery of a drive shaft elastic member 256 of the rotary drive device 5 in FIG. 10; It is a figure which shows the laminated steel plate manufacturing apparatus 300, and is a figure corresponded to FIG. 3 in the laminated steel plate manufacturing apparatus 100. FIG. 13A and 13B are diagrams showing a main part of an upper mold driving device 15 in FIG. 12, showing (a) a state in which the upper mold 2 is at the top dead center, and (b) a state in which the upper mold 2 is at the bottom dead center; It is a figure which compared. It is a figure which shows the laminated steel plate manufacturing apparatus 400, and is a figure corresponded to FIG. 3 in the laminated steel plate manufacturing apparatus 100. FIG. FIG. 15 is a detailed view explaining the periphery of a drive shaft elastic member 256 of the rotary drive device 5 in FIG. 14; 1 in the laminated steel plate manufacturing apparatus 100, and shows an example in which the outer shape upper die 20 does not rotate and only the outer shape lower die 30 rotates. FIG. 17 is a cross-sectional view taken along the line VV of FIG. 16; FIG. 4 is a detailed view of a main part of the nozzle unit 40 in the adhesive application device 4, showing a first state in which the adhesive 45 is not discharged; FIG. 4 is a detailed view of a main part of the nozzle unit 40 in the adhesive application device 4, showing a second state of discharging the adhesive 45; FIG. 20 is a detailed view around a nozzle discharge section 140 in FIG. 19; FIG. 6 is a detailed view showing the state of the laminated steel plate manufacturing apparatus 100 when the outer mold 11 is not properly rotated with respect to the state of FIG. 5 ; FIG. 22 is a detailed view around a nozzle discharge section 140 in FIG. 21; FIG. 4 is an explanatory diagram of a configuration in which an adhesive 45 is not discharged when an upper mold 2 is pressed toward a lower mold 3 in the adhesive applying device 4; 2 is a plan view showing a first example of a heating unit 7 in the laminated steel plate manufacturing apparatus 100. FIG. 2 is a plan view showing a second example of a heating unit 7 in the laminated steel plate manufacturing apparatus 100. FIG. 3 is a plan view showing a first steel plate holding unit 8 in the laminated steel plate manufacturing apparatus 100. FIG. FIG. 27 is a cross-sectional view showing the cross section II-II and the cross section III-III in FIGS. 24 to 26 together; 25A and 25B are diagrams comparing an example of the relationship between the connecting hole 76 and the connecting pin 85 before and after thermal expansion of the heating movable part holder 71. FIG. (b) shows the state when thermally expanded. 2 is a plan view showing a second steel plate holding unit 108 in the laminated steel plate manufacturing apparatus 100. FIG. FIG. 29 is a cross-sectional view showing the cross section II-II in FIGS. 24 and 25 together with the cross section IV-IV in FIG. 29; 2 is a cross-sectional view showing a first example of a cooling device 6; FIG. FIG. 33 is a cross-sectional view in the planar direction showing a second example of the cooling device 6, and is a cross-sectional view at a substantially center position in the vertical direction (the cross section along the central axis C3 in the planar direction of FIG. 33). FIG. 33 is a sectional view showing a second example of the cooling device 6 in FIG. 32; It is a diagram for explaining the process of manufacturing the steel plate 17, and shows a case where when the steel plate 17 is rotated by a predetermined angle θ, the outer shape is relatively different from that before the rotation. 20 and the outer mold 30 are synchronously rotated by a predetermined angle .theta. to punch out the next steel plate 17. FIG. FIG. 10 is a diagram illustrating the process of manufacturing the steel plate 17, showing a case of point symmetry in which the outer shape is relatively the same before and after the steel plate 17 is rotated by a predetermined angle θ, and the outer shape lower die is changed each time the steel plate 17 is punched. A case is shown in which the next steel plate 17 is punched after the steel plate 17 is rotated by a predetermined angle θ. 3 is a block diagram showing a control device 90 of the laminated steel plate manufacturing apparatus 100 grade. FIG.

Hereinafter, a laminated steel plate manufacturing apparatus and a laminated steel plate manufacturing method embodying the present invention will be described with reference to the drawings. The referenced drawings are used to explain technical features that can be employed by the present invention. The configuration of the device described in the drawings is not meant to be limiting, but merely illustrative.

<Mold Configuration Common to Laminated Steel Plate Manufacturing Apparatus 100 to Laminated Steel Plate Manufacturing Apparatus 400>
First, among the laminated steel plate manufacturing apparatuses according to the first aspect of the present invention, the configuration 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. As shown in FIGS. 1 to 3, the laminated steel plate manufacturing apparatus 100 or the like is a manufacturing apparatus for manufacturing a laminated steel plate 14 by stacking steel plates 17 punched into a predetermined shape from a steel plate material 16 . In order to punch a steel plate 17 from a steel plate material 16, a mold 10 consisting of an upper mold 2 and a lower mold 3 which are paired is provided. The upper mold 2 and the lower mold 3 are relatively movable along the vertical direction.

The mold 10 includes an outline mold 11 composed of an outline upper mold 20 and an outline lower mold 30 for punching out the outline of the steel plate 17 . FIG. 2 shows a state in which the upper mold 2 stands by above the lower mold 3 in the vertical direction (top dead center), and FIG. The state (bottom dead center) in which the outer shape of the pressed steel plate 17 is punched is shown.

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 When punching the steel plate 17, each time one steel plate 17 is punched or each time a predetermined number of steel plates 17 are punched, the outer shape upper mold 20 and the outer shape lower mold 30 are each rotated by a predetermined angle θ. A steel plate 17 is punched from a steel plate material 16 in a state in which relative positions are aligned with each other, and the steel plates 17 are laminated to form a laminated steel plate 14 .

In the example shown in FIG. 1, the laminated steel plate 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 processes while the steel plate material 16 is transferred by the transfer device 12 . The steel plate 17 is formed by a plurality of stamping steps. A portion of the steel plate 17 excluding the outer shape is formed by an auxiliary upper mold 320 and an 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 . Note that the laminated steel plate manufacturing apparatus 100 and the like may be single press dies instead of progressive press dies.

Details will be described later, but as shown in FIGS. and the outer mold 11 form the steel plate 17 .

<Configuration of rotatable outer shape upper mold 20 and outer shape lower mold 30>
Next, with reference to FIGS. 4 to 6, the configurations of the rotatable outer shape upper mold 20 and the outer shape lower mold 30 will be described. The members forming the outer mold 20 form a substantially cylindrical upper outer mold outer peripheral surface 29 with at least a part of the outer periphery centered on the first central axis C1. The upper mold 2 has a cylindrical upper mold opening 127 that accommodates the outer shape upper mold 20 . A bearing member 28 is provided at a portion where the outer shape upper mold 20 and the upper mold 2 face each other, including between the outer peripheral surface 29 and the upper mold opening 127 .

The contour upper mold 20 is slidably rotatable with respect to the upper mold 2 via bearing members 28 . The members forming the lower outer mold 30 form a lower outer mold outer peripheral surface 38 having a substantially cylindrical shape with at least a part of the outer periphery centered on the first central axis C1. The lower mold 3 has a cylindrical lower mold opening 136 that accommodates the outer shape lower mold 30 . A bearing member 28 is provided at a portion where the lower outer mold 30 and the lower mold 3 face each other, including between the outer peripheral surface 38 and the lower mold opening 136 . The outer shape lower mold 30 is slidably rotatable with respect to the lower mold 3 via a bearing member 28 .

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

<Detailed Description of Outer Mold 20>
Next, with reference to FIGS. 4 to 6, the configuration of the upper outer mold 20 will be described in detail. The contour punch 21 in the upper contour die 20 and the contour punching die 31 in the lower contour die 30 are configured to rotate synchronously during the period between each punching process. That is, the outer shape upper die 20 is configured such that the outer shape punch 21 and all the members connected to it rotate synchronously. The outer shape lower die 30 has a configuration in which the outer shape punching die 31 and all the members connected to it rotate synchronously.

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

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

The contour upper die 20 forms a rotary stripper 22 below the rotary punch plate 27 . The rotary stripper 22 consists of a rotary stripper holder 226 and a rotary stripper plate 227 . The rotary stripper plate 227 is coupled to the rotary stripper holder 226 to rotate together. The rotary stripper 22 and the contour punch 21 are movable relative to each other in the vertical direction. The rotary stripper 22 has a stripper elastic member 220 between itself and the rotary punch plate 27 .

The rotary stripper plate 227 applies a compressive force on the surface of the steel plate material 16 to constrain the steel plate material 16 before the steel plate material 17 is punched by the stripper elastic member 220 . Further, after the contour punch 21 punches and penetrates the steel plate 17 , the steel plate 17 is pressed and held until the contour punch 21 comes out of the steel plate 17 to the upper side in the vertical direction. The rotary stripper plate 227 is gradually separated from the surface of the steel plate 17 after the outline punch 21 is pulled out from the steel plate 17 to the upper side in the vertical direction. The rotary stripper 22 is provided with a ball retainer bearing as a bearing member 28 between the stationary stripper holder 128 and is rotatable.

As shown in FIG. 4, the rotating stripper 22 is fixed to the stationary stripper holder 128 by an auxiliary plate 130 and bolts. As shown in FIG. 2, the stripper bolts 111 pass through the first fixed punch plate 121 and fasten the fixed stripper holder 128 . The stripper bolt 111 is connected to the upper die 2 via a stripper bolt elastic member 112 . The first fixed punch plate 121 is relatively movable in the vertical direction with respect to the stripper bolt 111 . Stripper bolts 111 and stripper bolt elastic members 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 die 2 .

<Detailed description of the outer mold 30>
Next, referring to FIG. 6, the configuration of the outer shape lower mold 30 will be described in detail. The outer shape lower mold 30 is composed of the following components from the upper side to the lower side in the vertical direction. The uppermost part forms the outline punching die 31 and then the first squeeze ring 34 , and the die holder 32 covers the outer circumference of the outline punching die 31 and the first squeeze ring 34 . A cooling guide path 35 is fastened to the lower side of the die holder 32 with bolts. A contour lower mold pulley 33 is formed on the outer periphery of the upper side of the cooling guide path 35 . The first squeeze ring 34 and cooling guideway 35 form part of a steel plate guideway 36 . Also, the cooling guide path 35 forms part of the cooling device 6, which will be 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 coating 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 stacked under pressure directed downward in the vertical direction, which is generated when the outer shape is punched. The film of the adhesive 45 between the laminated steel plates 17 is thinned to a micrometer-level thickness.

In the lower die 3 , a die holder housing 132 covers the outer circumference of the die holder 32 via a ball retainer bearing as the bearing member 28 . Also, the cooling guide path housing 131 partially covers the outer circumference of the cooling guide path 35 via a 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 a cylindrical outer die outer peripheral surface 38 having a cylindrical shape. With this configuration, the outer shape lower mold 30 is rotatable with respect to the lower mold 3 around the first central axis C1.

<Outline description of rotation drive device 5 for outer shape upper mold 20 and outer shape lower mold 30>
Next, with reference to FIGS. 7 to 9, the rotation driving device 5 for rotationally driving the outer shape upper mold 20 and the outer shape lower mold 30 will be described. The rotation driving device 5 includes an upper mold driving device 15 that rotates the outer shape upper mold 20, a lower mold driving device 19 that rotates the outer shape lower mold 30, the upper mold driving device 15 and the lower mold driving device. 19 is provided. Furthermore, a rotation drive control device 54 that controls driving of the rotation drive source 51 is provided.

The rotation drive control device 54 drives the rotation drive source 51 while the upper mold 2 and the lower mold 3 are separated in the vertical direction. Further, the rotational drive source 51 is controlled to rotate so that the outer shape upper die 20 and the outer shape lower die 30 are rotated by a predetermined angle θ each time one steel plate 17 is punched or each time a predetermined number of steel plates 17 are punched. do. Specifically, it may be driven and rotated each time the steel plate 17 is punched, or if a predetermined number is set, for example, when the set number is five, the steel plate 17 may be driven and rotated every time five steel plates 17 are punched. You may let

<Problems to be Solved by Common Mold Configurations and Rotational Drives of Each Embodiment and Their Effect>
As described above, the structure of the mold 10 common to each embodiment in the laminated steel plate manufacturing apparatus 100 or the like solves various problems and produces an effect.

A conventional laminated steel sheet manufacturing apparatus has a configuration for performing rolling by rotating a die in a lower die, and a punch in an upper die is fixed. Therefore, it is a condition that the steel plate single plate and laminated steel plate to be manufactured have a point-symmetric shape, and there is a problem that a point-asymmetric shape cannot be handled. Laminated steel sheets that form the core of the armature have various shapes, and if the shapes are point-symmetrical, there is a problem that the applicable range is narrowed. The above is the first problem of the mold configuration.

The configuration of the laminated steel plate manufacturing apparatus 100 and the like of the present invention solves this problem. When forming the steel plate 17, the laminated steel plate manufacturing apparatus 100 or the like has the configuration shown in FIGS. The steel plate material 16 can be punched in a state in which the positions are matched, and the steel plates 17 can be laminated. Therefore, the steel plate 17 can be rotated by a predetermined angle θ without limitation on the outer shape, and then laminated to manufacture the laminated steel plate 14. Therefore, the deviation in the thickness direction after the steel plate 17 is laminated can be reduced.

As an example, conventionally, as shown in FIG. 35, it was only possible to deal with the case where the steel plate 17 had a point-symmetrical outer shape with respect to the center (first central axis C1). When the outer mold 30 is rotatable, when the outer shapes before and after being rotated by a predetermined angle θ are superimposed as shown in FIG. For example, this is the case when the external shape is T-shaped. On the other hand, in the present invention, the outer shape upper die 20 and the outer shape lower die 30 rotate synchronously, so that the outer shape is not limited to point-symmetrical shapes, and various outer shapes can be accommodated. Moreover, since the predetermined angle θ can be set arbitrarily, the degree of freedom in setting the outer shape is high.

Next, the mold configuration of the laminated steel plate manufacturing apparatus 100 and the like has the second problem of stably rotating the upper outer mold 20 and the lower outer mold 30 in order to rotate them, and centering them before and after the rotation. There is a problem of preventing the position from shifting. The configuration of the laminated steel plate 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 plate manufacturing apparatus 100 and the like include an outer shape upper mold 20 and an upper mold 2 including a space between an outer outer mold outer peripheral surface 29 and an upper mold opening 127. are provided with bearing members 28 . A bearing member 28 is provided at a portion where the lower outer mold 30 and the lower mold 3 face each other, including between the outer peripheral surface 38 and the lower mold opening 136 . Therefore, the outer shape upper die 20 can slide and rotate with respect to the upper die 2 and the outer shape lower die 30 can stably slide and rotate with respect to the lower die 3 without rotational vibration.

As already explained, the outer peripheral surface 29 of the mold on the outer shape corresponds to the outer peripheral surface of each of the outer shape rotary punch head 23 , the rotary punch plate 27 and the rotary stripper 22 . The inner peripheral surfaces of the upper mold sub-plate 122 , the first fixed punch plate 121 , and the fixed stripper holder 128 correspond to the upper mold opening 127 . The outer peripheral surface 29 of the outer mold is cylindrical, and the upper mold opening 127 is a cylindrical opening corresponding to the outer peripheral surface 29 of the upper outer mold. Therefore, the upper mold 2 and the outer shape upper mold 20 are smoothly rotated by the ball retainer bearing as the bearing member 28 interposed therebetween without rotational vibration.

Next, the mold structure of the laminated steel plate manufacturing apparatus 100 or the like has a third problem. It is necessary to provide an appropriate driving device for synchronously rotating the upper contour mold 20 and the lower contour mold 30. . If the outer shape upper die 20 and the outer shape lower die 30 are not linked and rotate independently, there is a possibility of damage to the laminated steel plate manufacturing apparatus 100 or the like due to poor synchronization, which is a problem to be solved. . The laminated steel plate manufacturing apparatus 100 etc. which concerns on the 1st aspect of this invention solves this subject.

As shown in FIGS. 7 and 8, etc., the laminated steel plate manufacturing apparatus 100 and the like can rotate the outer shape upper mold 20 and the outer shape lower mold 30 with a single rotation drive source 51 . Therefore, the rotary drive device 5 can be downsized, and the cost of the device can be reduced. Further, when the steel plate 17 is punched, the rotation drive control device 54 performs control to rotate the steel plate 17 by a predetermined angle θ for each predetermined number of sheets including one. can be done.

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

<Outline description 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 plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 400 of the fourth embodiment will be described. The rotary drive device 5 includes a rotary drive shaft 55 that transmits the rotation of the rotary drive source 51 to the outer shape upper mold 20 and the outer shape lower mold 30 , and a drive shaft support base 53 that supports the rotary drive shaft 55 . Further, a drive shaft elastic member 156 is provided that applies 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 . The rotary drive shaft 55 is rotatable around the second central axis C2.

The rotary drive shaft 55 includes an upper mold drive shaft 56 that is vertically above and engages with the upper mold driving device 15 , and a lower mold driving shaft 56 that is vertically below and is engaged with the lower mold driving device 19 . Consists of a drive shaft 58, the upper die drive shaft 56 and the lower die drive shaft 58 are engaged with each other in the rotational 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.

For example, one of the portions where the upper die drive shaft 56 and the lower die drive shaft 58 engage is a convex portion having a cross-shaped cross-sectional shape, and the other is a concave portion having a cross-shaped cross-sectional shape. The convex portion and the concave portion are slidable in the vertical direction, and are precisely finished to the extent that a gap is minimized in the rotational direction.

The upper mold drive device 15 and the upper mold drive shaft 56 are relatively movable in the vertical direction. In a state in which the upper mold 2 and the lower mold 3 are separated 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 vertical direction for joining. state. When the rotation drive source 51 is driven, the lower die drive shaft 58 rotates to rotate the lower die drive device 19 and transmit the rotation to the outer shape lower die 30 .

Furthermore, the lower die drive shaft 58 transmits rotation to the upper die drive shaft 56 , and the upper die drive device 15 transmits rotation to the outer shape upper die 20 . When the upper mold 2 presses down the lower mold 3 in the vertical direction, the upper mold drive shaft 56 and the upper mold drive device 15 are separated in the vertical direction to release the joined state. do.

<Detailed description of the configuration common to the rotary drive device 5>
Next, with reference to FIGS. 2 to 9, the configuration of the rotation drive device 5 common to the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate 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 includes a drive belt 52 that transmits the rotation of the rotary drive source 51 to the lower mold drive device 19, and the drive belt 52 that receives the rotation of the lower mold drive. A rotary drive pulley 50 that rotates synchronously with the drive shaft 58 and a lower die drive pulley 91 that rotates synchronously with the lower die drive shaft 58 are provided. Furthermore, a lower die drive belt 92 is provided for transmitting the rotation of the lower die drive pulley 91 to the outer shape lower die 30 .

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

As shown in FIG. 6, the contour lower die 30 includes a contour lower die pulley 33 driven by the drive of the lower die drive belt 92, and rotates integrally with the rotation of the contour lower die pulley 33. As shown in FIG. As shown in FIGS. 4 and 5, the contour upper mold 20 includes a contour upper mold pulley 24 driven by the driving of the upper mold drive belt 152, and rotates together with the rotation of the contour upper mold pulley 24. .

As shown in FIGS. 2 and 3, the upper die drive pulley holding portion 154 is directly or indirectly connected to the upper die 2 and moves as the upper die 2 moves in 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 vertical direction. As shown in FIGS. 7 and 9(a) (FIGS. 12 and 13(a)), when the upper mold 2 and the lower mold 3 are separated in the vertical direction, the drive shaft elastic member 156 The upper die drive shaft 56 is pressed against the upper die drive pulley 151 in the vertical direction to establish 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, thereby rotating the lower die drive shaft 58, thereby rotating the lower die drive pulley 91. . The lower die drive pulley 91 transmits rotation to the outer shape lower die 30 via a lower die drive belt 92 . The lower die drive shaft 58 transmits rotation to the upper die drive shaft 56 and transmits rotation to the outer shape upper die 20 via the upper die drive belt 152 .

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

The drive belt 52, the upper die drive belt 152, and the lower die drive belt 92 are suitable for use as timing belts. The rotary drive pulley 50, the upper die drive pulley 151, and the lower die drive pulley 91 are all suitable timing pulleys corresponding to the timing belts to be used. In addition, the upper contour pulley 24 of the upper contour mold 20 and the lower contour pulley 33 of the lower contour mold 30 are also suitable timing pulleys corresponding to the timing belt to be used. Configurations that differ according to each embodiment will be described later.

<Description of Balance Corrector 160>
Next, the configuration of the balance correction section 160 will be described with reference to FIGS. 2 and 3 as an example. The outer shape upper mold 20 and the outer shape lower mold 30 are provided with a balance correction part 160 at a position symmetrical to the rotary drive device 5 with respect to the first central axis C1. The balance correction unit 160 includes a balance correction base 161 on the lower mold 3 and a balance elastic member 164 and the like between the balance correction base 161 and the upper mold 2 . The balance elastic member 164 and the like prevent the upper die 2 from tilting in the rotary drive device 5 .

The rotary drive device 5 is driven by the drive shaft elastic member 156 when pressure is applied downward in the vertical direction to the upper die drive shaft 56 or when the upper die drive shaft 56 and the lower die drive shaft 58 come into contact with each other. When it starts to move, an eccentric load is generated. As a result, the upper mold 2 may tilt. In order to prevent tilting due to the eccentric load, the balance correction unit 160 includes a balance elastic member 164 that generates the same eccentric load on the opposite side of the rotary drive device 5 with respect to the first central axis C1, thereby preventing tilting. It is something to do. A plurality of balance elastic members 164 may be provided. 2 and 3 show the laminated steel plate manufacturing apparatus 100 of the first embodiment as an example, detailed description including other embodiments will be given later.

<Problem to be Solved by the Rotational Drive Device Common to Each Embodiment and Its Effect>
As described above, the rotary drive device 5 in the laminated steel plate manufacturing apparatus 100 or the like solves various problems and produces effects.

The first issue is the following. 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 upper outer mold 20 moves relative to the lower outer mold 30 in the vertical direction. This is a problem to be solved because it is necessary to have a configuration that corresponds to 20 movements. Furthermore, when the outer shape of the steel plate 17 is punched and an error in the amount of rotation accumulates every time the steel plate 17 is rotated by a predetermined angle θ, the positional deviation between the outer shape upper die 20 and the outer shape lower die 30 increases, leading to damage to the device. There is The laminated steel plate manufacturing apparatus 100 and the like according to the first aspect of the present invention solves 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 upper mold 2 and the lower mold 3 are separated in the vertical direction, the rotation drive source 51 drives the lower mold. The mold driving device 19 is rotated to transmit the rotation to the outer mold 30 . At the same time, the lower die drive shaft 58 transmits rotation to the upper die drive shaft 56 , and the upper die drive device 15 transmits rotation to the outer shape upper die 20 . Therefore, the outer shape upper mold 20 and the outer shape lower mold 30 can be rotated synchronously.

Furthermore, when the upper mold 2 presses down the lower mold 3 in the vertical direction, the upper mold drive shaft 56 and the upper mold drive device 15 are spaced apart in the vertical direction and joined together. release. Therefore, every time the upper mold 2 is pushed down, the phase difference between the upper mold driving device 15 and the lower mold driving device 19 is released, so that the accumulation of errors can be eliminated.

Next, the second problem is to install the rotary drive device 5 such as the laminated steel plate manufacturing apparatus 100 without increasing the size of the entire apparatus, and to have a configuration with a high degree of freedom in arrangement position and the like. In addition, since there is a possibility that the components of the rotary drive device 5 having many moving parts may deteriorate or break down more frequently, it is necessary to improve maintainability. The laminated steel plate manufacturing apparatus 100 and the like according to the first aspect of the present invention solves these problems.

As an example, as shown in FIGS. 7 to 9, the laminated steel plate manufacturing apparatus 100 and the like are configured to rotate the outer shape upper mold 20 and the outer shape lower mold 30 by a combination of a drive belt 52 and a rotation drive pulley 50. is. Therefore, the positional relationship between the rotation drive control device 54 and the upper outer mold 20 and the lower outer mold 30 can be easily set.

Further, the rotary drive device 5 is connected to the outer shape upper mold 20 by an upper mold drive belt 152 and to the outer shape lower mold 30 by a lower mold drive belt 92 . By removing the upper die drive belt 152 and the lower die drive belt 92 , the rotation drive device 5 can be easily separated from the upper die 2 and the lower die 3 . Therefore, the rotary drive device 5 such as the laminated steel plate manufacturing apparatus 100 can be easily maintained in the event of failure or the like.

Further, when the rotary drive device 5 rotates the outer mold 20 and the outer mold lower 30, the upper mold drive shaft 56 and the upper mold drive pulley 151 are joined in the vertical direction. When the outer shape upper mold 20 is pressed against the outer shape lower mold 30, the joined state is released in the vertical direction and the separated state is established. Therefore, the outer shape upper mold 20 and the outer shape lower mold 30 can be rotated synchronously. Furthermore, 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 pushed down, the accumulation of errors can be eliminated.

Next, the third problem is that the rotation drive device 5 of the laminated steel plate manufacturing apparatus 100 or the like may cause an eccentric load to tilt the upper die 2 in the following cases. This is when the drive shaft elastic member 156 starts applying downward pressure to the upper die drive shaft 56 in the vertical direction, or when the upper die drive shaft 56 and the lower die drive shaft 58 start to come into contact with each other. If the upper mold 2 is tilted, there is a problem that the centers of the outline punch 21 and the outline punching die 31 are misaligned, and they are damaged due to mutual cushioning. The laminated steel plate manufacturing apparatus 100 and the like according to the first aspect of the present invention solves these problems.

As shown in the examples of FIGS. 2 and 3, the balance corrector 160 is provided on the opposite side of the rotary drive device 5 across the first central axis C1. Since the balance elastic member 164 prevents tilting of the rotary drive device 5, the upper mold 2 can be stably moved with respect to the lower mold 3 without tilting or shifting. Furthermore, the device life of the laminated steel plate manufacturing device 100 and the like can be lengthened.

<Description of Configuration Specific to Each Embodiment>
Next, among the present invention, the unique configuration from the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 400 of the fourth embodiment will be described. The configuration of each embodiment is different in the rotary drive device 5 and the balance correction unit 160, and the other configurations are common. The configuration other than the portion described here is based on the common configuration already described.

<Description of Configuration Unique to Apparatus 100 for Manufacturing Laminated Steel Plates of First Embodiment>
A configuration unique to the laminated steel plate manufacturing apparatus 100 of the first embodiment according to the first aspect of the present invention will be described. The specific part will be explained with respect to the common configuration already explained. Description of the common configuration is omitted. The same applies to the laminated steel plate manufacturing apparatus 200 of the second embodiment to the laminated steel plate 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. FIG. The drive shaft support base 53 is fixed to the lower die holder 120 of the lower die 3 and separated from the upper die 2 . The drive shaft support 53 includes ball retainer bearings as bearing members 28 between the upper and lower portions of the upper die drive shaft 56 and between the upper and lower portions of the lower die drive shaft 58. A mold drive shaft 58 is rotatable.

As shown in FIG. 7, the upper die drive shaft 56 has a flange 60 in part, and a plate 159 above the flange 60 with a thrust needle bearing 155 therebetween. A compression coil spring is provided as the drive shaft elastic member 156 between . The drive shaft elastic member 156 always presses the upper die drive shaft 56 downward in the vertical direction.

As shown in FIG. 9 , the upper die drive shaft 56 forms a conical tapered portion 57 below the collar portion 60 . The upper die drive pulley 151 has a sleeve ring collet 153 on its inner periphery and has a tightening force with respect to the tapered portion 57 of the upper die drive shaft 56 . As shown in FIG. 9A, when the upper die 2 is positioned at the top dead center, the elastic force of the sleeve ring collet 153 clamps the upper die drive shaft 56, causing the upper die drive shaft 56 to be tightened. rotates, the rotation is transmitted to the upper die drive pulley 151 . The elastic force of the sleeve ring collet 153 increases as the upper die 2 approaches the top dead center, and the upper die drive shaft 56 is tightened more. The elastic force of the sleeve ring collet 153 is strong enough to generate sufficient tightening force so as not to cause slippage between the sleeve ring collet 153 and the tapered portion 57 when the upper die drive shaft 56 rotates.

As shown in FIG. 9(b), when the upper die 2 is at the bottom dead center, the upper die drive pulley is held by an amount greater than the downward movement of the upper die drive shaft 56 in the vertical direction. The portion 154 moves downward together with the upper die drive pulley 151 . When the upper die 2 is at the bottom dead center, there is a gap 257 between the tapered portion 57 and the sleeve ring collet 153, and even if the upper die drive shaft 56 rotates, the upper die drive pulley 151 rotates. do not tell A portion of the upper die drive shaft 56 other than the tapered portion 57 is provided with a ball retainer bearing as a bearing member 28 between itself and the inner circumference of the upper die drive pulley 151 . The tapered portion 57 and the sleeve ring collet 153 are separated from each other, and the upper die drive shaft 56 and the upper die drive pulley 151 are relatively rotatable.

The tapered portion 57 and the sleeve ring collet 153 start to separate from each other as shown in FIG. 37 (see FIG. 4). The outer shape upper mold 20 inserts the positioning pilot pins 25 into the positioning pilot holes 37 of the outer shape lower mold 30 in a state in which the connection between the upper mold drive pulley 151 and the lower mold drive pulley 91 is released. Therefore, the rotational error generated 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. Therefore, the rotational error is eliminated. do not accumulate. This principle is the same for the laminated steel plate manufacturing apparatus 200 of the second embodiment to the laminated steel plate 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 passes through the upper die drive shaft 56 and holds the upper die drive pulley 151 . In the vertical direction, the upper die drive pulley 151 has a plate 159 on its lower side, and a thrust needle bearing 155 between the plate 159 and the upper die drive pulley holding portion 154 . The upper die drive pulley 151 is rotatable with respect to the upper die drive pulley holding portion 154 .

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

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

Next, the balance correction unit 160 in the laminated steel plate manufacturing apparatus 100 will be described with reference to FIGS. 2 and 3. FIG. The balance corrector 160 includes a balance corrector 161 fixed to the lower mold holder 120 . As shown in FIG. 2 and the like, the balance correction table 161 is partially recessed. The load balance base 163 coupled to the upper mold 2 receives pressure downward in the vertical direction from the balance elastic member 164 in the concave portion of the balance correction base 161 . The balance elastic member 164 in the laminated steel plate manufacturing apparatus 100 is, for example, a compression coil spring. As already explained, when an eccentric load occurs and the upper die 2 tilts, the elastic force of the balance elastic member 164 corrects the tilt.

<Explanation of configuration unique to the laminated steel plate manufacturing apparatus 200 of the second embodiment>
Next, with reference to FIGS. 10 and 11, the configuration of a laminated steel plate manufacturing apparatus 200 of a second embodiment according to the first aspect of the present invention will be described. The difference from the laminated steel plate manufacturing apparatus 100 is the configuration of the drive shaft elastic member 256 in the rotary drive device 5 and the balance correction table 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 53 unlike the drive shaft elastic member 156 in the laminated steel plate manufacturing apparatus 100 . The gas spring 166 has high-pressure gas (nitrogen gas: nonflammable) enclosed in a closed cylinder, and uses the reaction force of this gas as elastic force. Although the gas spring 166 is small, it can obtain a small spring constant with a large initial load, so it has the characteristic of giving a stable elastic force regardless of the stroke amount. Therefore, the gas spring 166 employed as the drive shaft elastic member 256 has a more stable pressure than the compression coil spring employed in the laminated steel plate manufacturing apparatus 100 of the first embodiment. That is, the pressure difference between when the upper die 2 is at the top dead center and when it is at the bottom dead center is small.

A 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 die drive shaft 56 downward via the thrust needle bearing 155 . The upper mold drive shaft 56 is rotatable by a thrust needle bearing 155 with respect to the gas spring 166 . Since the upper end of the upper die drive shaft 56 and the drive shaft support 53 are provided with a ball retainer bearing as a bearing member 28 , the upper die drive shaft 56 can also rotate with respect to the drive shaft support 53 . be.

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

<Description of Configuration Specific to Laminated Steel Plate Manufacturing Apparatus 300 of Third Embodiment>
Next, with reference to FIGS. 12 and 13, a configuration specific to the laminated steel plate manufacturing apparatus 300 of the third embodiment according to the first aspect of the present invention will be described. The drive shaft support 53 consists of an upper mold drive shaft support 253 and a lower drive shaft support 254 . The lower drive shaft support base 254 is fixed to the lower die holder 120 and supports the lower die drive shaft 58 and part of the vertically lower side of the upper die drive shaft 56 . The upper die drive shaft support base 253 is fixed to the upper die 2 at its upper side in the vertical direction, and is integrally connected to the upper die drive pulley holding portion 154 at its lower side. When the upper die 2 moves in the vertical direction, the upper die drive shaft support base 253 and the upper die drive pulley holding portion 154 move simultaneously.

As shown in FIG. 13 , the rotary drive device 5 attaches a sleeve ring collet 153 to the outer periphery of the upper die drive shaft 56 and joins and separates it from the inner periphery of the upper die drive pulley 252 . A release bushing 158 is provided below the sleeve ring collet 153 . As shown in FIG. 13(a), when the upper die 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 pushed down by the elastic force. It joins with the upper die drive pulley 252 . This allows the sleeve ring collet 153 to rotate the upper die drive shaft 56 and the upper die drive pulley 151 integrally. The elastic force of the sleeve ring collet 153 is strong enough to generate a sufficient tightening force so as not to cause slippage between the sleeve ring collet 153 and the upper die drive pulley 252 when the upper die drive shaft 56 rotates.

As shown in FIG. 13(b), when the upper die 2 is at the bottom dead center, the upper die drive pulley is held by an amount greater than the downward movement of the upper die drive shaft 56 in 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 the rotation to the upper die drive pulley 151 . As in the laminated steel plate manufacturing apparatuses 100 and 200, the rotation error occurring between the upper die driving pulley 151 and the lower die driving pulley 91 is caused by the outer shape punching operation of the steel plate 17 by the outer shape upper die 20 and the outer shape lower die 30. Since it is canceled every time, it does not accumulate rotation errors.

Next, the configuration of the balance correction section 160 will be described. As shown in FIG. 12, the balance corrector 160 includes a balance corrector 168 (161) fixed to the lower mold 3 and a compression coil spring 165 as a balance elastic member 164. As shown in FIG. Further, an upper balance support base 167 is provided which accommodates the balance elastic member 164 and the balance support rod 162 inside and is fixed to the upper mold 2 . With the above configuration, the balance correction unit 160 corrects the inclination by the elastic force of the balance elastic member 164 when the upper die 2 is inclined due to the occurrence of an eccentric load.

<Description of Configuration Specific to Laminated Steel Plate Manufacturing Apparatus 400 of Fourth Embodiment>
Next, with reference to FIGS. 14 and 15, the configuration of a laminated steel plate manufacturing apparatus 400 of a fourth embodiment according to the first aspect of the present invention will be described. The laminated steel plate manufacturing apparatus 400 differs from the laminated steel plate manufacturing apparatus 300 in the drive shaft elastic member 256 in the rotary drive device 5 and the balance elastic member 164 in the balance corrector 160 .

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

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

<Description of Configuration Specific to Laminated Steel Plate Manufacturing Apparatus 500 of Fifth Embodiment>
Next, with reference to FIGS. 16 and 17, the configuration of a laminated steel plate manufacturing apparatus 500 of a fifth embodiment according to the first aspect of the present invention will be described. Unlike the laminated steel plate manufacturing apparatus 100 and the like already described, the laminated steel plate manufacturing apparatus 500 does not have a structure in which the outer shape upper mold 20 rotates around the first central axis C1, and only the outer shape lower mold 30 is a lower metal mold. It is configured to be rotatable with respect to the mold 3 .

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

The configuration of a rotation drive device 510 corresponding to the rotation drive device 5 in the laminated steel plate manufacturing apparatus 100 or the like will be described with reference to FIG. 17 . The rotary drive device 510 has the same configuration as the lower die drive device 19 of the rotary drive device 5 . The difference is that the drive support base 511 is fixed to the lower die holder 120 to support the rotary drive shaft 512 .

<Description of Configuration Specific to Laminated Steel Plate Manufacturing Apparatus 600 of Sixth Embodiment>
Next, although not shown, the configuration of the laminated steel plate manufacturing apparatus 600 of the sixth embodiment according to the first aspect of the present invention will be described. The laminated steel plate manufacturing apparatus 600 differs from the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment in that the outer shape upper mold 20 and the outer shape lower mold 30 are arranged along the first central axis C1. does not have a rotatable configuration around the The laminated steel plate manufacturing apparatus 600 may include a cooling device 6 to be described later, and may further include an adhesive coating device 4 . When the adhesive application device 4 is provided, a steel plate alignment heating device 9, which will be described later, may be provided. Further, the adhesive application device 4 to be described later is configured to apply the adhesive 45 from the nozzle discharge part 140, but in a form in which the steel plates 17 are laminated by caulking to manufacture the laminated steel plate 14 without using the adhesive 45. It's okay.

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

As shown in FIGS. 4, 5, 18, and 19, the adhesive applying device 4 includes a nozzle unit 40 for discharging an adhesive 45, an adhesive reservoir 46 for storing the adhesive 45, an adhesive A supply pipe 47 for supplying the adhesive 45 from the reservoir 46 to the nozzle unit 40 is provided. The side of the adhesive reservoir 46 is defined as the upstream side, and the side of the nozzle unit 40 is defined as the downstream side. The nozzle unit 40 includes a nozzle 41 forming a nozzle discharge portion 140 for discharging the adhesive 45 onto the steel plate 17, and a nozzle 41 inside the nozzle 41 for selectively supplying the adhesive 45 from the upstream side to the downstream side. A nozzle open/close valve 42 is provided. Further, a nozzle holder 43 that supports the nozzle 41 so as to be movable in the vertical direction is provided.

The nozzle unit 40 can form a first state in which the nozzle 41 is located relatively downstream with respect to the nozzle holder 43 by the operating member 210 ( 2 ) or the like. Furthermore, a second state can be formed in which the nozzle 41 is positioned upstream relative to the nozzle holder 43 .

When the actuating member 210 ( 2 ) is actuated to one side, the nozzle 41 is in the first state where the nozzle 41 is positioned downstream relative to the nozzle holder 43 , and the nozzle discharge portion 140 discharges the steel plate 17 including the steel plate material 16 . come into contact with Further, when the operating member 210(2) is actuated to one side, the nozzle 41 moves in the vertical direction relative to the nozzle holder 43 to form the second state, and the nozzle open/close valve 42 opens. , forming a channel for the adhesive 45 inside the nozzle unit 40 .

When the actuating member 210 is actuated to the other side, the nozzle 41 moves downstream relative to the nozzle holder 43 to form the first state. Then, the nozzle open/close valve 42 is closed to block the passage of the adhesive 45 inside the nozzle unit 40 .

Next, in the configuration of the adhesive application device 4, points that differ depending on the embodiment will be described. In the case of the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate 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 die 2 moves in the vertical direction, so that the nozzle 41 is positioned downstream relative to the nozzle holder 43 in the first state. Formable. Furthermore, a second state can be formed in which the nozzle 41 is positioned upstream relative to the nozzle holder 43 .

As for the nozzle 41 , when the upper die 2 moves downward in the vertical direction, the nozzle discharge portion 140 contacts the steel plate 17 including the steel plate material 16 . Up to this state is the first state. Further, when the upper die 2 moves relatively downward in the vertical direction, the nozzle 41 moves upstream relative to the nozzle holder 43 to form the second state.

Moreover, in the case of the laminated steel plate manufacturing apparatus 500 of the fifth embodiment, the operating member 210 is an operating slide cam 513 as shown in FIG. The actuating slide cam 513 is partially inclined vertically with respect to the vertical direction, and moves along the horizontal direction (between the front side and the rear side in the drawing) to move the nozzle 41 vertically. 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 upper mold 2 or in the horizontal direction provided for the upper mold 2. A possible actuating slide cam 513 . As shown in FIG. 16, when the adhesive application device 520(4) is in the lower mold 3, the actuating member 210 is a horizontally movable actuating slide cam 513 provided on the lower mold 3. .

When the adhesive application device 4 is in the upper mold 2 and the operating member 210 is in the upper mold 2, the adhesive application device 4 is moved in the vertical direction as the upper mold 2 moves. Form one state and a second state. When the operating member 210 is the operating slide cam 513, the first state and the second state are formed by moving the operating slide cam 513 in the horizontal direction.

<Description of Configuration of Nozzle Opening/Closing Valve 42>
Next, the configuration of the nozzle opening/closing valve 42 will be described in detail with reference to FIGS. 18 and 19. FIG. The nozzle opening/closing valve 42 includes a first nozzle opening/closing valve 142 , a first nozzle valve elastic member 143 , a second nozzle opening/closing valve 144 , a second nozzle valve elastic member 145 and a third nozzle opening/closing valve 146 . The nozzle holder 43 forms therein a first adhesive flow path 148 extending in the vertical direction. The nozzle 41 forms therein 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 opening/closing valve 142 contacts the nozzle holder 43 and closes the first adhesive flow path 148 by the elastic force of the first nozzle valve elastic member 143 . The second nozzle opening/closing valve 144 closes the second adhesive channel 147 by the elastic force of the second nozzle valve elastic member 145 . The third nozzle opening/closing valve 146 closes the third adhesive channel 150 in a closed state.

As shown in FIG. 19 , in the second state, the nozzle 41 moves upstream relative to the first nozzle valve 142 against the elastic force of the first nozzle valve elastic member 143 . The nozzle holder 43 creates a gap between itself and the first nozzle opening/closing valve 142 to open the first adhesive flow path 148 . The adhesive 45 flows from the first nozzle channel 281 to the second nozzle channel 282 and then into the second adhesive channel 147 . The second nozzle opening/closing valve 144 moves downstream relative to the nozzle 41 by the pressure of the adhesive 45 flowing into the second adhesive channel 147 to open the second adhesive channel 147 . Further, the pressure of the adhesive 45 expands the third nozzle opening/closing valve 146 to open the third adhesive flow path 150 and supply the adhesive 45 to the nozzle discharge section 140 .

<Detailed Description of Nozzle Open/Close Valve 42 and Related Elements>
Next, with reference to FIGS. 18 and 19, the nozzle opening/closing valve 42 and related elements will be described in further detail. In the nozzle holder 43, the first nozzle holder 240 and the second nozzle holder 242 are arranged in this order from the upstream side, and are integrally operated by tightening bolts. As shown in FIG. 5 and the like, the end of the first nozzle holder 240 is a nozzle engaging portion 241 . When the adhesive application device 4 is in the upper mold 2 , it contacts the nozzle cam engaging surface 244 of the nozzle slide cam 49 of the upper mold 2 or the nozzle cam concave portion 245 . As shown in FIG. 16, when the adhesive application device 4 is in the lower mold 3, it comes into contact with some members of the lower mold 3 (not shown).

As shown in FIG. 5 , the adhesive application device 4 supplies the adhesive 45 from the adhesive reservoir 46 through the supply pipe 47 . The supply pipe 47 connects with the first nozzle holder 240 . When the adhesive application device 4 is inside the outer mold 20 , the supply pipe 47 is connected to the rotary joint 48 and further to the first nozzle holder 240 . As shown in FIGS. 18 and 19, the first nozzle holder 240 forms a first nozzle flow channel 281 extending vertically inside, and the second nozzle holder 242 forms a second nozzle flow channel 281 connected to the first nozzle flow channel 281 . A nozzle channel 282 is formed. As an example, the example shown in FIG. 18 and the like shows a case where there are two nozzles 41 and the like, and the second nozzle flow path 282 branches in two directions. More 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 has 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 stepped portion 175 , and the nozzle guide portion 283 has a narrower flow path than the second nozzle flow path 282 . The nozzle 41 is inserted into the second nozzle channel 282 and the nozzle guide portion 283 and is movable in the vertical direction. The nozzle 41 has O-rings 243 at a plurality of locations on a part of the outer circumference to prevent the adhesive 45 from leaking out 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 channel 282 is provided with a first nozzle open/close valve 142 . One end of the first nozzle opening/closing valve 142 forms a receiving portion 171 for a first nozzle valve elastic member 143 made of, for example, a compression coil spring. A portion is a cylindrical portion 173 that fits into a stepped portion 175 of the nozzle holder 43 . As shown in FIG. 18, in the first state, the collar portion 172 contacts a portion of the stepped portion 175 of the nozzle holder 43, and the cylindrical portion 173 is fitted into the stepped 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 stepped portion 175, a gap is generated between the cylindrical portion 173 and the stepped portion 175, and the first adhesive flow path 148 is opened.

As shown in FIG. 20, the second nozzle opening/closing 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 opening/closing valve 144 .

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

As shown in FIG. 18, in the first state in which the on-off valve hole 135 is not pressured by the adhesive 45, the opening/closing valve hole 135 is in a closed state, and the second adhesive channel 147 to the third adhesive channel is in a closed state. The flow of adhesive 45 to 150 is stopped. As shown in FIG. 19 , in the second state in which the on-off valve hole 135 receives pressure from the adhesive 45 , the on-off valve hole 135 is in an open state, and the flow from the second adhesive flow path 147 to the third adhesive flow path 150 is opened. The adhesive 45 flows to the

The third nozzle opening/closing valve 146 is, for example, a material having elasticity such as a very thin fluororubber or silicon rubber. Fluororubber is a rubber with outstanding 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. Ultra-fine holes refer to holes with a diameter of 10 to 30 μm. When the pressure of the adhesive 45 is not applied, the on-off valve hole 135 is closed with the fluororubber in a contracted state. Conversely, when the pressure of the adhesive 45 is applied to the third nozzle on-off valve 146 , the fluororubber stretches to open the on-off valve hole 135 and the adhesive 45 is discharged from the nozzle discharge part 140 . That is, since the third nozzle opening/closing valve 146 is made of a material having thin film elasticity, it can be opened/closed by the pressure of the adhesive 45 .

The first nozzle holder 240, the second nozzle holder 242, the nozzle 41, and the second nozzle opening/closing valve 144 described above are made of a resin such as POM, PE, PP, or fluorine to prevent the adhesive 45 from hardening. It may be resin-coated.

<Description of Configuration when Adhesive Application Device 4 is Inside Outer Mold 20>
Next, with reference to FIG. 4 and the like, a configuration in which the adhesive application device 4 is inside the outer mold 20 will be described. The nozzle unit 40 of the adhesive application device 4 is located inside the upper outer mold 20 and is rotatable around the first central axis C1 in synchronization with the upper outer mold 20 . In addition, it is movable in the vertical direction through the nozzle elastic member 44 between it and the external mold 20 .

The adhesive application device 4 moves in conjunction with the movement of the outer mold 20 in the vertical direction. As shown in FIG. 19, when the upper outer mold 20 moves downward in the vertical direction and the lower end surface 225 contacts the steel plate 17 including the steel plate material 16, the upper outer mold 20 and the nozzle unit 40 has a nozzle gap 255 in the vertical direction. The nozzle unit 40 is rotatably connected to the supply pipe 47 via a rotary joint 48 directly or indirectly. In addition, this structure is a structure applied from the laminated steel plate manufacturing apparatus 100 of 1st embodiment to the laminated steel plate manufacturing apparatus 400 of 4th embodiment.

<Description of Configuration of Device for Detecting Malrotation of Outer Mold 11>
Next, with reference to FIGS. 21 and 22, the configuration for detecting poor rotation between the upper contour mold 20 and the lower contour mold 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 plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 400 of the fourth embodiment.

As shown in FIG. 21, the laminated steel plate manufacturing apparatus 100 and the like include a first fixed punch plate 121 on which the upper mold 2 rotatably supports the outer shape upper mold 20, and a vertical direction with respect to the first fixed punch plate 121. and a rotation failure detection pin 123 having a cam portion 221 . Furthermore, when the detection pin elastic member 125 that presses the rotation failure detection pin 123 in the vertical direction and the rotation failure detection pin 123 move upward relatively, they come into contact with the cam portion 221 and move in the horizontal direction. A punching slide cam 124 is provided which can move to. The detection pin elastic member 125 is provided in an upper die holder 126 that supports the upper die 2 .

Also, the positioning pilot pins 25 already described are normally inserted into the positioning pilot holes 37 of the outer shape lower mold 30 . However, when the outer mold 20 and the lower outer mold 30 are not properly rotated, the tips of the positioning pilot pins 25 come into contact with the upper end surface 247 of the lower outer mold 30 . At this time, the compression coil spring, which is the pilot pin elastic member 26, is compressed and deformed to release the positioning pilot pin 25 upward.

The punch slide cam 124 has a punch cam concave portion 223 on the lower side in the vertical direction, and the outer shape upper die 20 has an outer shape punch convex portion 228 that projects upward in the vertical direction. The outer mold 30 has a rotation failure detection hole 39 into which a rotation failure detection pin 123 can be inserted. If rotation failure occurs between the outer shape upper mold 20 and the outer shape lower mold 30, the following will occur. The upper mold 2 moves downward in the vertical direction, and the tip 222 of the rotation failure detection pin 123 moves downward in the vertical direction at a position different from the position of the rotation failure detection hole 39 . move to the side.

When the upper mold 2 moves downward in the vertical direction, the punching slide cam 124 is moved until the tip 222 of the rotation failure detection pin 123 contacts the upper end surface 247 of the outer shape lower mold 30 . engages with the cam portion 221 of the rotation failure detection pin 123 and moves along the horizontal direction. The outer punch convex portion 228 of the upper outer mold 20 enters the punch cam concave portion 223 and moves upward in the vertical direction. The upper outer mold 20 stops moving when the lower end surface 225 of the upper outer mold 20 and the upper end surface 247 of the lower outer mold 30 are separated from each other. Further, the nozzle discharge portion 140 of the nozzle unit 40 is in contact with the steel plate 17 including the steel plate material 16 .

Furthermore, when the upper die 2 changes its moving direction upward in the vertical direction, the outer shape upper die 20 moves upward. As shown in FIG. 22, the nozzle unit 40 is configured such that the nozzle discharge portion 140 continues to rotate the steel plate 17 including the steel plate material 16 until the nozzle gap 255 (see FIG. 19) between the outer mold 20 and the nozzle unit 40 disappears. maintain contact with the

<Description of Configuration for Stopping Application of Adhesive 45>
Next, with reference to FIG. 23, a configuration for the adhesive application device 4 to stop applying the adhesive 45 will be described. The adhesive application device 4 includes a nozzle elastic member 44 between the upper mold 2 or the lower mold 3 of the mold 10 on which the adhesive application device 4 is installed and the nozzle unit 40 in the vertical direction. The upper die 2 or the lower die 3 on which the adhesive coating device 4 is installed is provided with a nozzle slide cam 49 that is movable in the horizontal direction and has a nozzle cam concave portion 245 on the vertically lower side.

The nozzle slide cam 49 has a nozzle cam engaging surface 244 partially forming a nozzle cam concave portion 245 , and the nozzle unit 40 has a nozzle engaging portion 241 that engages with the nozzle slide cam 49 . When the upper die 2 moves downward in the vertical direction, the nozzle engaging portion 241 engages with the nozzle cam engaging surface 244 other than the nozzle cam concave portion 245, and the nozzle discharge portion 140 includes the steel plate material 16. A state in which the steel plate 17 is adjacent. A state in which the nozzle engaging portion 241 is engaged with the nozzle cam concave portion 245 and the nozzle discharge portion 140 is separated from the steel plate 17 including the steel plate material 16 can be selected. When the nozzle discharge part 140 is separated from the steel plate 17 including the steel plate material 16, the nozzle unit 40 is vertically above the nozzle cam concave part 245 compared to when the nozzle unit 40 is close to the steel plate 17 and the like. A gap 149 is formed between the nozzle discharge portion 140 and the lower end surface 225 of the contour punch 21 .

<Problem to be Solved and Effect of Adhesive Coating Device 4>
As described above, the adhesive application device 4 in the laminated steel plate manufacturing apparatus 100 or the like solves various problems and produces effects. In the conventional adhesive application device, the adhesive is always supplied with a predetermined pressure from the adhesive discharge section. When the adhesive application device contacts a steel plate or the like, the adhesive is applied. That is, when the upper mold is lowered and comes into contact with the steel plate or the like, the adhesive is applied. Therefore, the conventional adhesive applicator cannot be controlled to apply a fixed amount of adhesive, and there is a problem that the adhesive continues to overflow the adhesive discharge part or the steel plate, and the contamination by the adhesive spreads. On the other hand, the first problem to be solved is that the adhesive application device 4 applies the adhesive 45 in accordance with the movement of the upper mold 2 relative to the lower mold 3 . Furthermore, it is to control so that a fixed amount of adhesive 45 is applied to the steel plate 17 or the like. In accordance with 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 to control the amount of the adhesive 45 applied.

To solve this problem, the adhesive applying 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. 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. It is controllable and can be metered.

As shown in FIG. 18, in the first state, the nozzle opening/closing valve 42 is closed by positioning the nozzle 41 on the downstream side relative to the nozzle holder 43, and the adhesive 45 is discharged from the nozzle discharge portion 140. Do not dispense. Therefore, it is possible to prevent the adhesive 45 from being discharged in an unintended state or unintended timing for bonding the steel plate 17 . As shown in FIG. 19, in the second state, the nozzle opening/closing valve 42 is opened by positioning the nozzle 41 on the upstream side relative to the nozzle holder 43 . The adhesive application device 4 can apply a fixed amount of the adhesive 45 to the steel plate 17 or the like by maintaining the second state for a predetermined time according to the amount of the adhesive 45 to be applied. By applying the adhesive 45 to the steel plates 17 and the like at the timing when the steel plates 17 and the like should be adhered, the laminated steel plates 14 can be formed.

Depending on the configuration of the laminated steel plate manufacturing apparatus 100 and the like, the adhesive application device 4 may be provided in the upper mold 2 or in the lower mold 3 . 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 applying device 4 . To solve this problem, the adhesive application device 4 is provided with operating members 210 corresponding to when it is in the upper mold 2 and when it is in the lower mold 3. A second state can be formed. Therefore, the adhesive application 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 the adhesive coating device 4 is installed in the upper mold 2 or the lower mold 3. .

Also, the adhesive application device 4 must apply the adhesive 45 to the steel plate 17 or the like following the movement of the upper mold 2 relative to the lower mold 3 . The third problem is that the nozzle opening/closing valve 42 needs to be opened/closed in accordance 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 a first adhesive flow path 148, and the nozzle 41 forms a second adhesive flow path 147 and a third adhesive flow path leading to the nozzle discharge portion 140. A path 150 is formed. The nozzle opening/closing valve 42 includes a first nozzle opening/closing valve 142 , a first nozzle valve elastic member 143 , a second nozzle opening/closing valve 144 , a second nozzle valve elastic member 145 and a third nozzle opening/closing valve 146 . Since the first state and the second state are formed by the action of the above configuration, the state in which the adhesive 45 is applied and the state in which the discharge of the adhesive 45 is stopped can be established more reliably.

The nozzle opening/closing valve 42 has a configuration in which three opening/closing valves open and close in a chained manner as the nozzle 41 and the nozzle holder 43 move relative to each other in the vertical direction. When the first state shifts to the second state, the first nozzle opening/closing valve 142 is opened, the adhesive 45 flows into the first adhesive flow path 148, and the ball-shaped second nozzle opening/closing valve 144 is opened by the nozzle discharge section 140. side. Then, the pressure of the adhesive 45 opens the third nozzle on-off valve 146 and the adhesive 45 is discharged from the nozzle discharge part 140 . Therefore, since the adhesive 45 flows in stages from the upstream side to the downstream side, it is possible to prevent accidents caused by flowing out all at once. Furthermore, in the first state, all the three on-off valves are closed, which prevents the adhesive 45 from flowing out.

Further, as shown in FIG. 20 and the like, the third nozzle opening/closing valve 146 is made of a thin film member having an elastic force, and is located in a portion corresponding to the center position of the third adhesive flow path 150. When opened, the third nozzle opening/closing valve 146 is provided with an on-off valve hole 135 that is smaller than the horizontal width of the third adhesive channel 150 . Since the third nozzle opening/closing valve 146 is made of a material having thin film elasticity, it can be opened/closed by the pressure of the adhesive 45 . Therefore, the state in which the adhesive 45 is applied and the state in which the ejection of the adhesive 45 is stopped can be established more reliably. It should be noted that the on-off valve hole 135 is preferably an extremely fine hole. In that case, the third nozzle opening/closing valve 146 can more reliably stop the flow of the adhesive 45 from the second adhesive channel 147 to the third adhesive channel 150 in the first state. Furthermore, in the second state, the on-off valve hole 135 becomes an extremely fine hole, so that the adhesive 45 is stably discharged from the second adhesive channel 147 to the third adhesive channel according to the size of the on-off valve hole 135 . Adhesive 45 can be flowed to 150 .

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

The fifth issue is the following. In the laminated steel plate manufacturing apparatus 100 to the laminated steel plate manufacturing apparatus 400, when the outer shape upper mold 20 and the outer shape lower mold 30 are rotated by a predetermined angle θ, the positions of the molds do not match each other, that is, if rotation failure occurs, the outer shape There is a risk that the mold 11 and even the mold 10 as a whole may be damaged. There is a problem of detecting this rotation failure and preventing damage to the mold 10 and the like. Furthermore, since the adhesive application device 4 is located inside the upper outer mold 20, when rotation failure occurs between the upper outer mold 20 and the lower outer mold 30, it is possible to prevent interlocking defects from occurring. I have a problem. The laminated steel plate manufacturing apparatus 100 etc. which concerns on the 1st aspect of this invention solves this subject.

As shown in FIG. 21, when the position of the tip 222 of the rotation failure detection pin 123 does not match the position of the rotation failure detection hole 39 and the upper mold 2 moves downward along the vertical direction, the outer shape The punch protrusion 228 enters the punch cam recess 223 . Since the upper mold die 20 moves upward in the vertical direction only by the recessed amount of the punch cam concave portion 223, even if the upper mold mold 2 moves toward the lower mold 3, the upper mold die 20 does not move. The position of the steel plate material 16 is not reached. Therefore, when the outer shape upper die 20 is not in the correct position with respect to the outer shape lower die 30, the punching of the steel plate 17 is stopped. can.

Furthermore, even if the outer mold 11 has a rotation failure, the upper mold 2 moves downward in the vertical direction as an operation for 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 vertical direction, the contour punch 21 of the contour upper die 20 simultaneously moves upward. In the nozzle unit 40, when the contour punch 21 of the contour upper die 20 rises, the nozzle discharge part 140 maintains a state of contact with the steel plate 17 while the nozzle gap 255 (see FIG. 19) exists. That is, the nozzle unit 40 behaves independently of the behavior of the upper mold 2 and the contour upper mold 20 for a certain period of time. Therefore, even if the outer mold 11 has a rotation failure, the nozzle unit 40 in the adhesive application device 4 does not cause any interlocking trouble.

The sixth problem is that the adhesive application device 4 stops applying the adhesive 45 according to the number of laminated steel plates 17 in the laminated steel plate 14 to be manufactured. The laminated steel plate 14 is obtained by bonding a certain number of steel plates 17 . This is because the laminated steel plate manufacturing apparatus 100 or the like continuously punches the steel plate 17 from the steel plate material 16, so if the adhesive 45 is applied each time the steel plate 17 is punched, the bonding process cannot be stopped when a certain number of steel plates are laminated.

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

<Description of Schematic Configuration of Steel Plate Aligning and Heating Device 9>
Next, with reference to FIG. 27, the configuration of the steel plate aligning and heating device 9 common to all the embodiments will be described. The adhesive 45 is thermosetting. The outer shape lower die 30 has a steel plate guide path 36 extending downward in the vertical direction centered on the first central axis C1. The steel plate guide path 36 guides the steel plate 17 punched by the outer shape upper die 20 and the outer shape lower die 30 downward in the vertical direction. Further, the outer mold 30 forms a part of the steel plate guide path 36 and has a steel plate alignment heating device 9 for heating the steel plate 17 below the outer mold 30 in the vertical direction.

At least part of the steel plate aligning and heating device 9 contacts and heats the steel plates 17 and aligns the steel plates 17 in the stacking direction in the steel plate guide path 36 . The adhesive 45 applied to the steel plates 17 by the adhesive applicator 4 is cured by the heat of the steel plate aligning and heating device 9 , and adheres to the steel plates 17 adjacent in the vertical direction to form the laminated steel plates 14 .

<Description of Configuration of Heating Unit 7>
Next, the configuration of the heating unit 7 in the steel plate aligning and heating apparatus 9 will be described with reference to FIGS. 24 and 27. FIG. The steel plate aligning and heating device 9 includes a heating unit 7 that heats the steel plate 17 or the laminated steel plate 14 . The heating unit 7 is arranged to surround the steel plate guide path 36 in a direction intersecting the steel plate guide path 36 and includes a plurality of movable heating portions 72 movable toward the first central axis C1, A heating unit 74 for heating 72 is provided. Further, the heating unit 7 includes a movable elastic member 73 that moves the movable heating portion 72 in a direction intersecting the first central axis C1, and a movable heating portion holder 71 that guides the movement of the movable heating portion 72 . In the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment, the heating movable part holder 71 is rotatable together with the heating movable part 72 around the first central axis C1.

The movable heating part holder 71 is separated from the outer shape lower mold 30 in the vertical direction, and the movable heating part 72 is pressed against the outer peripheral part of the steel plate 17 from a plurality of directions by the elastic force of the movable elastic member 73. By heating, the steel plate 17 is aligned with the steel plate guide path 36 .

More specifically, as shown in FIG. 27, the heating part 74 is fixed to the sub-die plate 133 of the lower mold 3 via a heat insulating material 75. As shown in FIG. In the example shown in FIG. 24, the heating units 74 are plate-shaped heaters arranged at four locations around the heating movable unit holder 71 at equal intervals. Although the movable elastic member 73 made of a compression coil spring presses the side surface of the steel plate 17 from four directions, the heating movable portion 72 may press from two or more directions. . In the example shown in FIG. 25 , the heating part 74 is a ring-shaped heater that surrounds the outer periphery of the heating movable part holder 71 .

The heating movable portion 72 receives heat from the heating portion 74 and rises in temperature. When the heating movable part 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 in the lamination direction with respect to the steel plate guide path 36, the laminated steel plates 14 can be formed by laminating without the steel plates 17 being shifted. As shown in FIGS. 24 and 25, for example, since the heating movable part 72 presses the side surfaces of the steel plates 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 in the vertical direction from the outline punching die 31 of the outline lower die 30 . The steel plate 17 punched by the outer punch 21 of the upper outer mold 20 and the outer shape punching die 31 of the lower outer mold 30 sequentially pushes down the lower steel plate 17 each time the steel plate 17 is punched, and reaches the steel plate aligning and heating device 9. do. As shown in FIG. 27, when the heating 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 a 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 heating movable part holder 71 is set so as to allow the thermal expansion of the steel plate 17 considering that the holder 71 itself thermally expands. The reaction force of the movable elastic member 73 is received by the heating movable part holder 71 .

Further, the steel plate 17 and the laminated steel plate 14 positioned in the steel plate aligning and heating device 9 are subjected to pressure from the outline punch 21 when the steel plate 17 is punched. However, since the heating movable part 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.

<Problem to be Solved and Effect of Steel Plate Aligning and Heating Device 9>
As described above, the steel plate aligning and heating device 9 solves various problems and is effective. The first issue is as follows. The laminated steel plate manufacturing apparatus 100 or the like punches the steel plate 17 with the contour punch 21 of the upper contour die 20 and the contour punching die 31 of the lower contour die 30, and pushes the steel plate 17 vertically downward into the steel plate guide path 36. . The steel plate 17 is in a state where the adhesive 45 is applied. Therefore, a configuration for heating the steel plate 17 is required in order to harden the thermosetting adhesive 45 . Further, the steel plates 17 are moved vertically downward one by one by punching. Unless the steel plates 17 are properly aligned in the stacking direction along the steel plate guide path 36 and laminated, the side surfaces of the laminated steel plates 14 are not aligned and adhered. There is a problem of putting away.

The steel plate aligning and heating device 9 solves these problems. As shown in FIG. 27 and the like, the steel plate aligning/heating device 9 has a function of heating the steel plate 17 from the side surface by contacting the steel plate 17 to harden the adhesive 45 and bonding it, can be combined with the function of aligning to Therefore, the steel plate aligning and heating device 9 can form the laminated steel plate 14 by bonding the steel plates 17 while aligning them in the stacking direction.

Specifically, the heating movable part 72 heated to a high temperature by the heating part 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 harden the adhesive 45 . can be made In addition, the steel plates 17 can be aligned in the stacking direction, and the steel plates 17 can be stacked with the side surfaces aligned to form the laminated steel plates 14 .

The second issue is as follows. The steel plate aligning and heating device 9 needs to apply heat evenly to surfaces where the steel plates 17 are in contact with each other when the steel plates 17 are laminated so that the adhesive 45 can harden evenly on the steel plates 17 . In addition, 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 deviation. Furthermore, when the heat of the heating part 74 is transferred to the lower mold 30, the dimensions of the outline punching die 31 and other parts change, resulting in 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 aligning and heating device 9 has a plurality of heating movable parts 72 arranged so as to surround the steel plate guide path 36, so that the steel plate 17 can be evenly heated. . Therefore, the steel plate aligning and heating device 9 can evenly harden the adhesive 45 on the laminated steel plates 14 and strengthen the adhesive force. Further, since the heating movable part 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.

<Description of Configuration Regarding Rotational Driving of Steel Plate Aligning and Heating Device 9>
Next, the configuration related to the rotational drive of the steel plate aligning and heating device 9 will be described. The configuration related to the rotational drive of the steel plate aligning and heating device 9 described below includes the laminated steel plate manufacturing device 100 of the first embodiment in which the outer shape lower mold 30 can rotate around the first central axis C1 to the laminated steel plate manufacturing device 100 of the fifth embodiment. This is the configuration of the steel plate manufacturing apparatus 500 . As already described with reference to FIG. 7 and the like, the lower mold driving device 19 in the rotation driving device 5 includes the heating device driving section 93 that is rotationally driven by the rotation driving source 51 . The heating device driving section 93 (see FIG. 7) includes a heating device driving pulley 94 and a heating device driving belt 95 that transmits rotation of the heating device driving pulley 94 to the steel plate alignment and heating device 9 .

As shown in FIG. 27 , the steel plate alignment and heating device 9 includes a heating device pulley 84 rotatable about a first central axis C 1 and receiving rotation of a heating device drive belt 95 . The heating device driving section 93 rotates the heating movable section holder 71 including the heating movable section 72 in synchronization with the outline lower die 30 by driving in synchronization with the lower mold driving section 19 .

<Problem to be Solved and Effect of Rotational Driving of Steel Plate Aligning and Heating Device 9>
As described above, the configuration relating to the rotational drive of the steel plate aligning and heating device 9 solves the following problems and produces an effect. The steel plate aligning and heating device 9 is in contact with the cooling guide path 35 of the outer mold 30 between the first convex portion 248 and the first concave portion 249, but they are not connected to each other. Since the steel plate 17 and the laminated steel plate 14 rotate with the rotation of the outer mold 30, the part of the steel plate aligning and heating device 9 that contacts the steel plate 17 and the laminated steel plate 14 must rotate synchronously with the outer mold 30. There is a problem.

In order to solve this problem, as shown in FIG. 7 and the like, the lower die driving device 19 includes a heating device driving section 93 that is rotationally driven by a rotational driving source 51 . Therefore, the heating movable part holder 71 including the heating movable part 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 .

<Description of Configuration of First Steel Plate Holding Unit 8>
Next, the configuration of the first steel plate holding unit 8 in the steel plate aligning and heating device 9 will be described with reference to FIGS. 24 to 28. FIG. The configuration of the first steel plate holding unit 8 described below is a configuration that can be commonly applied to all the embodiments. As shown in FIG. 27 , the steel plate aligning and heating device 9 further includes a first steel plate holding unit 8 that holds the steel plate 17 below the heating unit 7 in the vertical direction and prevents the steel plate 17 from dropping. The heating movable part holder 71 has 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 includes a steel plate holding block 81 forming part of the steel plate guide path 36, and the steel plate holding block 81 intersects the first central axis C1. A steel plate holding movable part 82 that can move in the direction is provided. Further, the first steel plate holding unit 8 includes a steel plate holding elastic member 83 that applies 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 dropping of the laminated steel plate 14 onto the steel plate guide path 36 . In the example shown in FIG. 26 , the steel plate holding movable portion 82 contacts the side surfaces of the steel plate 17 or the laminated steel plate 14 from four directions by the steel plate holding elastic members 83 .

The configuration of the first steel plate holding unit 8 will be described in further detail with reference to FIGS. 26 and 27. FIG. 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 shape 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 is square. Although the steel plate holding movable portion 82 holds the steel plate 17 or the laminated steel plate 14 from four directions in the example shown, the steel plate holding movable portion 82 may hold 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 of the groove in which the steel plate holding movable portion 82 slides is a first inner dimension 285 . The first inner dimension 285 is set so that there is a slight gap with respect to the dimension of the passing laminated steel plates 14 in a thermally expanded state. As an example, the first inner dimension 285 is set to have a gap of about 0.01 to 0.02 mm on one side with the laminated steel plate 14 . This is to allow the laminated steel plates 14 to pass through the inner peripheral portion of the steel plate holding block 81 forming the steel plate guide path 36 even when 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 portion below the upper end of the groove in which the steel plate holding movable portion 82 slides is a 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 (about 0.1 mm as a gap on one side with respect to the laminated steel plates 14).

As shown in FIG. 6 , the lower die 3 includes a back pressure support 315 that supports the laminated steel plates 14 from below at the lower end of the steel plate guide path 36 in the vertical direction. The back pressure support table 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 to the outside. At this time, as shown in FIGS. 26 and 27, the steel plate holding movable portion 82 is provided with an elastic force by 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 drop downward due to its own weight. holds the laminated steel plate 14 from the side.

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

Next, in the first steel plate holding unit 8, the configuration specific 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 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 in the steel plate holding block 81 . When the rotary drive source 51 is driven, the heating device pulley 84 receives the rotation of the heating device drive belt 95, rotates the steel plate holding block 81 and the steel plate holding movable part 82, and furthermore, rotates through 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 has a ball retainer bearing as a bearing member 28 between itself and the sub-die plate 133, and rotates smoothly around the first central axis C1. The laminated steel plates 14 are stacked by continuously punching the steel plates 17 one by one by the outer punch 21 of the upper outer mold 20 and the outer shape punching die 31 of the lower outer mold 30 , and are stacked downward along the steel plate guide path 36 . By pushing it out, the steel plate comes out of the guide path 36 of the lower die 3 .

<Problem to be Solved and Effect of First Steel Plate Holding Unit 8>
As described above, the first steel plate holding unit 8 solves the following problems and produces effects. The first problem is that when the steel plate aligning and heating device 9 laminates the steel plates 17 to form the laminated steel plate 14, the laminated steel plate 14 is heavier than the steel plate 17, so there is a possibility that the laminated steel plate 14 falls vertically downward. There is

In order to solve this problem, as shown in FIGS. It is possible to prevent the laminated steel plate 14, which is increased in the thickness, from falling.

The second problem is that in the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment, since the laminated steel sheet 14 is guided downward along the steel sheet guide path 36, the It is necessary to rotate the steel plate holding unit 8 in synchronization with the heating movable part holder 71 . To solve this problem, the heater pulley 84 formed in the steel plate holding block 81 rotates the heating movable part holder 71 through the connecting pin 85 and the connecting hole 76 . Therefore, the heating device driving section 93 can synchronously rotate the steel plate holding movable section 82 and the heating movable section holder 71 .

<Description of Configuration of Second Steel Plate Holding Unit 108>
Next, the configuration of the second steel plate holding unit 108 in the steel plate aligning and heating device 9 will be described with reference to FIGS. 29 and 30. FIG. The configuration of the second steel plate holding unit 108 described below is a configuration commonly applicable to all the embodiments. The description of the configuration similar to that of the first steel plate holding unit 8 shown in FIGS. 24 to 28 is omitted.

As shown in FIGS. 29 and 30, the steel plate aligning and heating apparatus 9 further includes a second steel plate holding unit 108 below the heating unit 7 in the vertical direction to hold the steel plate 17 and restrict its falling. The heating movable part holder 71 has 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 part of the steel plate guide path 36, a contact projection 89 on 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 is provided for engaging the . The contact protrusion 89 contacts and holds the outer peripheral portion of the laminated steel plate 14 .

Next, in the second steel plate holding unit 108, the configuration unique 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 heater pulley 84 is formed in a steel plate holding block 88 . When the rotary drive source 51 is driven, the heater pulley 84 receives the rotation of the heater drive belt 95 to rotate the steel plate holding block 88 , and further rotates the heating movable part holder 71 via the connecting pin 85 and the connecting hole 76 . Let

As described above, the second steel plate holding unit 108 differs 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 has the steel plate holding unit 108. The point is that the contact protrusion 89 in the block 88 holds the laminated steel plates 14 and the like.

<Problem to be Solved and Effects of Second Steel Plate Holding Unit 108>
As described above, the second steel plate holding unit 108 solves the same problems as the first steel plate holding unit 8, and produces effects. The first problem is that when the steel plate aligning and heating device 9 laminates the steel plates 17 to form the laminated steel plate 14, the laminated steel plate 14 is heavier than the steel plate 17, so there is a possibility that the laminated steel plate 14 falls vertically downward. There is

In order to solve this problem, as shown in Figs. It is possible to prevent the laminated steel plate 14, which is heavier than the above, from falling.

The second problem is that in the laminated steel sheet manufacturing apparatus 100 of the first embodiment to the laminated steel sheet manufacturing apparatus 500 of the fifth embodiment, since the laminated steel sheet 14 is guided downward along the steel sheet guide path 36, the It is necessary to rotate the two steel plate holding unit 108 in synchronization with the heating movable part holder 71 . To solve this problem, the heater pulley 84 formed in the steel plate holding block 88 rotates the heating movable part holder 71 through the connecting pin 85 and the connecting hole 76 . Therefore, the heating device driving section 93 can synchronously rotate the steel plate holding movable section 82 and the heating movable section holder 71 .

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

As shown in FIG. 27, the outer shape lower mold 30 and the heating movable part holder 71 are in contact only in the direction where the first convex portion 248 and the first concave 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 and the upper side surface 267 forming the upper side of the heating movable part holder 71 are separated from each other in the vertical direction. The central position of the portion of the steel plate guide path 36 formed by the outer mold 30 and the portion formed by the heating movable part holder 71 coincides with the first central axis C1. The movable heating part holder 71 and the steel plate holding block 81 are engaged by contacting the second convex part 258 and the second concave part 259, and the part of the steel plate guide path 36 formed by the movable heating part holder 71 is formed. 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 portion 248 and the first concave portion 249 have a gap 265 in the vertical direction. Therefore, the first convex portion 248 and the first concave portion 249 are only partially in contact with each other, and are separated from each other. Further, the gap 265 prevents interference with the cooling guide path 35 when the heating movable part holder 71 thermally expands and changes its dimension in the vertical direction. When the temperature of the heating movable part holder 71 rises due to the heating of the heating part 74, heat transfer to the cooling guide path 35 can be suppressed.

As shown in FIGS. 24 and 25, the first concave portion 249 is, for example, square-shaped, and the first convex portion 248 to be fitted is also square-shaped. In addition, the first convex portion 248 and the first concave portion 249 are not limited to a rectangular shape, and may be other polygonal shapes, circular shapes, or elliptical shapes. In addition, as shown in FIG. 26, the second convex portion 258 and the second concave portion 259 are similarly rectangular. Not limited to a rectangular shape, other polygonal shapes may be used, and circular or elliptical shapes may also be used.

The first convex portion 248 and the first concave portion 249, and the second convex portion 258 and the second concave portion 259 are both formed to have an interference fit at room temperature. In the normal temperature state, gaps are generated between the cooling guide path 35 and the heating movable part holder 71 and between the heating movable part holder 71 and the steel plate holding block 81 to prevent displacement with respect to the first central axis C1. It's for. As a result, when the steel plates 17 are stacked, the stacked steel plates 14 are prevented from overlapping in the stacking direction.

Next, the relationship between the connecting hole 76 and the connecting pin 85 will be described with reference to FIGS. 24 and 28. FIG. A plurality of connecting pins 85 are arranged on the same circumference around the first central axis C1 in the steel plate holding block 81 . The connecting hole 76 is formed in the heating movable part holder 71 so as to correspond to the position of the connecting pin 85 , and the length 77 in the direction intersecting the first central axis C<b>1 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 such that the width in the circumferential direction is equal to or greater than the diameter of the connecting pin 85 and the gap between them is , and the degree of precise rolling of the clearance fit. A clearance fit is a state in which the shaft diameter is generally smaller than the hole diameter and there is a clearance. This indicates the case where the maximum allowable shaft diameter is smaller than the minimum allowable hole diameter. Of these, fine rolling indicates a relationship in the case of requiring precise motion with almost no backlash between them. In this case, the width 78 of the connecting hole 76 is machined according to the diameter of the connecting pin 85, and the clearance is eliminated to the extent that the connecting pin 85 can be relatively slid in the direction intersecting the first central axis C1.

When the heating movable part 72 is heated by the heating part 74 and the heating movable part holder 71 thermally expands, the connecting hole 76 is formed at the end on the first central axis C1 side in the direction intersecting the first central axis C1. 86 and in the circumferential direction about the first central axis C1, it engages with the connecting pin 85 . The steel plate holding block 81 and the heating movable part holder 71 move relative to each other around the first central axis C1 in a direction crossing the first central axis C1 and in a 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 heating movable part holder 71 thermally expand, they expand radially in the horizontal direction about the first central axis C1 substantially uniformly. . 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 each connecting pin 85 , positional deviation between the heating movable part holder 71 and the steel plate holding block 81 can be reduced by providing them at a plurality of positions.

The heating movable part holder 71 thermally expands substantially uniformly radially in the horizontal direction about the first central axis C1. In this case, a uniform gap is generated between the second convex portion 258 of the steel plate holding block 81 and the second concave portion 259 of the heating movable portion holder 71 . On the other hand, in the direction crossing the first central axis C1, the connecting hole 76 and the connecting pin 85 are engaged to prevent mutual movement. Therefore, the heating movable part holder 71 and the steel plate holding block 81 maintain the positional relationship about 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 gap between the connecting pin 85 and the connecting pin 85 in the circumferential direction does not change much even if the heating movable part holder 71 thermally expands, so the positional relationship is similarly maintained. do.

Next, referring to FIG. 28, a configuration in which the connecting hole 76 has a specific form will be described. The connecting hole 76 has an arc shape with an end portion 86 on the side of the first central axis C1 formed with a radius 79 greater than or equal to the radius of the connecting pin 85 in the direction intersecting the first central axis C1. It is an opening that becomes wider in the circumferential direction as it moves away from C1. Preferably, the radius 79 of the end portion 86 on the side of the first central axis C<b>1 is a fine gap with respect to the connecting pin 85 and is substantially the same radius as the connecting pin 85 .

As shown in FIG. 28(a), 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 heating movable part holder 71 thermally expands, it expands in the direction of the arrow. At this time, since the steel plate holding block 81 having the connecting pin 85 expands less due to thermal expansion, the gap 87 disappears and the connecting pin 85 engages with the end portion 86 of the connecting hole 76 . The steel plate holding block 81 and the heating movable part holder 71 maintain their positional relationship in a state in which their respective center positions coincide with the first central axis C1. As described above, since the relative positional relationship between the heating movable part holder 71 and the steel plate holding block 81 changes, the connecting hole 76 and the connecting pin 85 engage with each other in the vertical direction. states that are not fixed between each other.

<Problem to be Solved and Effect of Relationship Between First Steel Plate Holding Unit 8 and Lower Outline Die 30>
As described above, the configuration of the relationship between the first steel plate holding unit 8 and the outer shape lower mold 30 solves various problems and produces effects. The first issue is the following. The steel plate aligning and heating device 9 heats the steel plate 17 in order to heat and harden the adhesive 45 applied to the steel plate 17, but when the heat is transferred to the outer shape punching die 31 of the outer shape lower mold 30, the dimension changes. , the dimensional accuracy decreases when the steel plate 17 is punched.

A configuration for solving this problem will be described with reference to FIGS. 24, 25 and 27. FIG. The cooling guide path 35 of the outer mold 30 and the heating movable part holder 71 of the steel plate aligning and heating device 9 are such that the first convex part 248 and the first concave part 249 intersect the first central axis C1. contact and engage only in one direction. Further, the lower side surface 266 forming the lower end of the outer shape lower mold 30 and the upper side surface 267 forming the upper end of the heating movable part holder 71 are separated from each other in the vertical direction. The central position of the portion of the steel plate guide path 36 formed by the outer mold 30 and the portion formed by the heating movable part holder 71 coincides with the first central axis C1. Therefore, the center positions of the steel plate guide paths 36 of the outer shape lower mold 30 and the heating movable part holder 71 can be matched. Since only the first convex portion 248 and the first concave portion 249 are in contact and engaged with the outer shape lower mold 30 and the heating movable part holder 71, and separated in the vertical direction, the outer shape from the heating movable part holder 71 Heat transfer to the lower mold 30 can be limited.

Further, as shown in FIGS. 26 and 27, the heating movable part holder 71 and the steel plate holding block 81 are engaged by contacting the second convex part 258 and the second concave part 259 . The central position of the portion of the steel plate guide path 36 formed by the heating movable part holder 71 and the portion of the steel plate holding block 81 is aligned with the first central axis C1. Therefore, the steel plate aligning and heating device 9 can align the central positions of the steel plate guide paths 36 leading from the outer shape lower mold 30 to the steel plate holding block 81 in the vertical direction.

Next, the second issue is as follows. The heating movable part holder 71 thermally expands under the influence of heating by the heating part 74 . Since the steel plate holding block 81 joined to the lower side of the heating movable part holder 71 in the vertical direction is not directly affected by the heating of the heating part 74, the dimensional change due to thermal expansion is different. At this time, there is a possibility that the central positions of the heating movable part holder 71 and the steel plate holding block 81 are shifted with respect to the first central axis C1. If the center position shifts, a step will occur between the steel plate guide path 36 formed by the heating movable part holder 71 and the steel plate guide path 36 formed by the steel plate holding block 81, so that the steel plate 17 and the laminated steel plate 14 can be smoothly lowered. Cannot move sideways.

In particular, when the size of the laminated steel plate 14 is large, the size of the corresponding portion of the outer shape lower mold 30 becomes large, so the amount of deformation due to thermal expansion becomes large. That is, since the size of the steel plate aligning and heating device 9 is increased, the gap between the first convex portion 248 of the cooling guide path 35 and the first concave portion 249 of the heating movable part holder 71 can become unignorable. In that case, the center position of the heating movable part holder 71 deviates from the first central axis C1. In particular, if the outer shape lower die 30 is rotated each time the steel plate 17 is punched, the backlash between the cooling guide path 35 and the heating movable part holder 71 becomes large due to the influence of rotational inertia. 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 plate aligning/heating device 9 is effective with the following configuration. As shown in FIGS. 24, 25, and 28, when the heating movable part holder 71 thermally expands, the connecting pin 85 and the connecting hole 76 are engaged with each other, and the first center axis C1 is centered on the first center axis C1. Mutual movement is prevented in the direction crossing the axis C1 and in the circumferential direction about the first central axis C1. Therefore, the heating movable part holder 71 and the steel plate holding block 81 are integrated with their center positions aligned with each other about the first central axis C1, so that their center positions match each other when they thermally expand. maintained.

The structure of the connecting pin 85 and the connecting hole 76 is to absorb displacement due to deformation occurring between the heating movable part holder 71 and the steel plate holding block 81 . This is because the heating of the heating movable part 72 thermally expands and deforms the heating movable part holder 71 together with the steel plate 17 and the laminated steel plate 14 . Therefore, even if the heating movable part 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 shape lower die 30 rotates about the first central axis C1, if the heating movable part holder 71 is thermally expanded, it may shake with the steel plate holding block 81, which is a problem. As already explained, the cooling guide path 35 and the heating movable part holder 71 are simply fitted together without being fixed. If there is a gap between the first convex portion 248 of the cooling guide path 35 and the first concave portion 249 of the heating movable part holder 71, when the outer mold 30 is rotated, there will be a gap between the two. There is a problem that the heating movable part holder 71 may vibrate due to timing deviation.

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 with an end 86 on the side of the first central axis C1 formed with a radius 79 greater 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. Preferably, the radius 79 of the end portion 86 on the side of the first central axis C<b>1 is a fine gap with respect to the connecting pin 85 and is substantially the same radius as the connecting pin 85 . As shown in FIG. 28(b), when the heating movable part holder 71 thermally expands in the direction of the arrow, the connecting pin 85 more reliably engages in the arc-shaped portion of the connecting hole 76, thereby separating the heating movable part holder 71 and the steel plate. A state in which the center position with the holding block 81 coincides is maintained. Since the connecting hole 76 and the connecting pin 85 are engaged with each other more reliably, there is an effect that the heating movable part holder 71 and the steel plate holding block 81 are integrally prevented from shaking.

<Description of Configuration of Cooling Device 6>
Next, the configuration of the cooling device 6 will be described with reference to FIGS. 31 to 33. FIG. First, the configuration common to all embodiments will be described. The lower die 3 is provided with a cooling device 6 above the steel plate alignment and heating device 9 in the vertical direction (see FIG. 6). The cooling device 6 comprises the following elements. A cooling guideway 35 forming part of the steel plate guideway 36 . An inner cooling part 61 fixed to the outer peripheral side of the cooling guide path 35 . An outer cooling part 62 located on the outer peripheral side of the inner cooling part 61 and directly or indirectly fixed to the lower mold 3 . A coolant circulation section 64 formed between the inner cooling section 61 and the outer cooling section 62 . Furthermore, a coolant supply unit 65 that supplies the coolant 260 to the coolant circulation unit 64 is provided. A coolant 260 can circulate on the outer periphery of the inner cooling section 61 .

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

As shown in FIG. 32 , the cooling device 6 includes a large number of first drain troughs 96 inside the outer cooling section 62 . The first drain gutter 96 is a gutter that extends vertically and connects a first coolant reservoir 263 and a second coolant reservoir 264, which will be described later. At least one cooling pipe 68 is connected to the coolant circulation portion 64 through the first opening 66 and another cooling pipe 68 is connected to the coolant circulation portion 64 through the second opening 67 . The coolant 260 , which cools the inner cooling portion 61 in contact with the cooling guide path 35 and rises in temperature, passes through the second drain gutter 97 and the second opening 67 to lower the temperature in the coolant cooling portion 69 . The coolant 260 can be circulated by further supplying it to the coolant circulation section 64 via the cooling pipe 68 . A coolant 260 can circulate on the outer periphery of the inner cooling portion 61 . The drain gutter includes the first drain gutter 96 and the second drain gutter 97 .

2, etc., and from FIG. There is shown an example in which the outer shape lower mold 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 to a configuration in which the laminated steel plate manufacturing apparatus 100 or the like does not include the adhesive coating device 4 and the steel plate alignment and heating device 9 . Alternatively, like the laminated steel plate manufacturing apparatus 600 of the sixth embodiment, in a configuration in which the lower mold 3 does not include the outer shape lower mold 30, or in a configuration in which the outer shape lower mold 30 does not rotate around the first central axis C1 is also applicable. Although not shown, the laminated steel plates 14 can be laminated by caulking instead of bonding with the adhesive 45 .

When the cooling device 6 described above is applied to the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment, that is, the outer shape lower mold 30 rotates around the first central axis C1 A description will be given of a configuration in which the rotation is possible. The outer shape lower die 30 has a steel plate guide path 36 extending downward in the vertical direction centered on the first central axis C1. The outer shape lower die 30 is rotatable around the first central axis C1, and the steel plate guide path 36 extends along the vertical direction of the steel plate 17 punched by the outer shape upper die 20 and the outer shape lower die 30. to the bottom of the The lower mold 3 has a cooling device 6 that cools the contour lower mold 30 .

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

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

<Detailed Description of Cooling Device 6>
Next, the configuration of the cooling device 6 will be described in further detail with reference to FIGS. 31 to 33. FIG. Here, the cooling device 6 applied 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 cooling device 6 includes a cooling guide path 35 , an inner cooling section 61 and an outer cooling section 62 , and a coolant 260 is circulated between the inner cooling section 61 and the outer cooling section 62 .

The inner cooling portion 61 is fixed by being fitted into the outer periphery of the cooling guide path 35 in a ring shape. The outer cooling part 62 is fixed to the outer circumference of the inner cooling part 61 . The inner cooling portion 61 is rotatable along with the cooling guide path 35 around the first central axis C1. The inner cooling part 61 uses a material such as copper, aluminum, or the like, which has good thermal conductivity. The outer cooling part 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 plurality of cooling agent injection holes, that is, a first opening portion 66 and a second opening portion 67, and includes a cooling channel groove 261 that is a vertical groove and a cooling channel groove 262 that is a horizontal groove. An agent circulation part 64 is formed. A plurality of coolant circulating portions 64 are formed on the inner peripheral side of the outer cooling portion 62 at substantially equal intervals in the circumferential direction. In the example shown in FIG. 32, the grooves are formed at four positions in the circumferential direction. A coolant 260 supplied from the coolant supply section 65 passes through the cooling pipe 68 and flows to the coolant circulation section 64 via the first opening 66 .

The coolant 260 circulated through the coolant circulation section 64 and raised in temperature passes through the second opening 67 , is cooled by the coolant cooling section 69 , and flows into the coolant circulation section 64 again. Therefore, the coolant 260 continuously cools the steel plate guideway 36 and its surroundings. Since the coolant 260 is injected from the first opening 66 with a pressure that allows circulation, the cooling guide passage 35 is rapidly cooled through the inner cooling portion 61 . Coolant 260 may be water or other liquid, or argon gas or other gas.

As shown in FIG. 6 , the cooling device 6 is vertically below the outline punching die 31 of the lower outline mold 30 and above the steel plate alignment and heating device 9 . Heating by the steel plate aligning and heating device 9 increases the temperature of the steel plate 17 , the laminated steel plate 14 , and the steel plate guide path 36 . On the other hand, since the cooling device 6 is located above the steel plate aligning and 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 prevented.

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

As shown in FIGS. 31 and 33 , the first coolant reservoir 263 is connected to the coolant circulation section 64 at the upper end in the vertical direction of the inner cooling section 61 , and the inner cooling section 61 and the outer cooling section 61 are formed in the circumferential direction. This gap is larger than the gap with the cooling part 62 . In the cross-sectional view of FIG. 31 and the like, the first coolant reservoir 263 is surrounded by the inner cooling part 61 in three of the four directions, and the outer cooling part 62 on the other side, which is the other one direction, is a vertical groove. The configuration is such that the portions other than the cooling channel grooves 261 are closed.

The second coolant reservoir 264 surrounds three of the four directions with the lower end of the inner cooling part 61 inserted into the recess formed in the outer cooling part fixing base 63 in the cross-sectional view of FIG. The upper side, which is one direction of , is configured such that the outer cooling portion 62 is closed except for the cooling channel grooves 261 which are longitudinal grooves.

<Problem to be solved and effect of cooling device 6>
As described above, the cooling device 6 solves various problems and produces effects. The first issue is the following. In the laminated steel plate manufacturing apparatus 100 and the like, if the outer shape punch 21 of the outer shape upper mold 20 and the outer shape punching die 31 of the outer shape lower mold 30 change due to heat, the dimensional accuracy when punching the steel plate 17 decreases, and the correct shape is not obtained. There is a problem that it will not be possible to form There are several causes for the temperature rise. As an example, when the steel plate 17 is punched by the contour punch 21 and the contour punching die 31, frictional heat is generated during punching, which may cause the temperature to rise.

Further, when forming the laminated steel plate 14, when the steel plates 17 are laminated by caulking, frictional heat may be generated during lamination and the temperature may rise. Also, if 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 mold 3 rises, and the temperature of the outline punching die 31 may also rise. Furthermore, 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 with respect to the lower mold 3 around the first central axis C1. At this time, frictional heat is generated due to rotational sliding between the outer shape lower die 30 and the lower die 3, and the temperature of the outer shape punching die 31 may rise. The cooling device 6 included in the laminated steel plate manufacturing apparatus 100 and the like solves these problems.

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

Furthermore, 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 is caused to flow through the coolant circulation section 64 in the circumferential direction as the inner cooling section 61 rotates. Since it circulates, the inner cooling portion 61 can be further cooled in the entire circumferential direction. Furthermore, the cooling guide path 35 in contact with the inner cooling portion 61 can be cooled. Further, as shown in FIG. 17 , in the laminated steel plate manufacturing apparatus 500 , the rotational driving device 510 controls the rotation of the lower outer mold 30 , the cooling guide path 35 and the inner cooling section 61 by a predetermined angle θ. Therefore, since the coolant 260 can circulate more on the outer circumference of the inner cooling portion 61 in the coolant circulation portion 64, the inner cooling portion 61 can be cooled more.

Next, the second issue is as follows. The laminated steel plate manufacturing apparatus 100 and the like continuously punch 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 cool continuously, which is a problem.

In order to solve this problem, the cooling device 6 is provided with a coolant cooling part 69 as in the configuration shown in FIGS. It can be circulated to the agent circulation unit 64 . Therefore, the cooling device 6 can have the effect of continuously cooling the cooling guide path 35 .

Next, the third issue is as follows. Since the cooling device 6 injects the coolant 260 from the first opening 66 at a constant pressure, there is a possibility that the coolant 260 may be ejected to the outside from the inner cooling section 61 and the outer cooling section 62 . In that case, there is a problem that the coolant 260 spreads inside the lower mold 3, causing problems such as corrosion.

In particular, in the case of the laminated steel plate manufacturing apparatus 100 to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment, the coolant 260 is pushed outside due to the rotational inertia force when the outer mold 30 rotates around the first central axis C1. Easy to erupt.

In order to solve this problem, as shown in FIGS. 31 to 33 , the cooling device 6 directs the coolant 260 flowing into the coolant circulation section 64 upward and downward in the vertical direction of the coolant circulation section 64 . As it unfolds, coolant 260 accumulates in first coolant reservoir 263 and second coolant reservoir 264 . Therefore, it is possible to prevent the coolant 260 from flowing out of the cooling device 6 . Also, when the coolant 260 spreads upward and downward in the vertical direction of the coolant circulation section 64 as the inner cooling section 61 rotates, the coolant 260 spreads between the first coolant reservoir 263 and the second coolant reservoir. 264 and accumulate. Therefore, it is possible to prevent the coolant 260 from flowing out of the cooling device 6 .

Furthermore, as shown in FIG. 32, since a large number of first drain troughs 96 are provided inside the outer cooling portion 62, when the scattered coolant 260 accumulates in the first coolant reservoir 263, the coolant 260 can be quickly drained. 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 section 65 . Therefore, the coolant 260 can circulate rapidly to enhance the cooling effect.

<Manufacturing method>
Next, a method for manufacturing a laminated steel plate according to the second aspect of the present invention will be described. Note that the laminated steel plate manufacturing method described here assumes that the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment are used. First, the configuration related to the steel plate manufacturing method will be described with reference to the block diagram of FIG. The laminated steel plate manufacturing apparatus 100 and the like are provided with a control device 90 that controls overall driving and the like. The input device 18 inputs not only the start and stop of the punching operation of the steel plates 17, but also the number of punches that determines how many steel plates 17 are punched out when the steel plates 17 are stacked. It is also an input device.

Information input to the input device 18 is received by the input/output interface 180 and processed by the CPU 181 . The CPU 181 performs rotation drive source drive processing by the rotation drive control device 54 , transfer drive processing for transferring the steel plate material 16 , and die elevation drive processing for raising and lowering the upper die 2 . Regarding these processes, the ROM 182 and the RAM 183 store information.

Next, the CPU 181 provides the processed driving information from the input/output interface 180 to each driving circuit. When driving the rotary drive device 5 , the CPU 181 gives drive information to the rotary drive circuit 184 to drive the rotary drive source 51 . When transferring the steel plate material 16 , drive information is given to the transfer drive circuit 185 to drive the transfer drive source 310 . In the step of punching the steel plate 17 by raising and lowering the upper mold 2 with respect to the lower mold 3, the CPU 181 gives drive information to the mold elevation drive circuit 186, and the mold elevation drive source 80 controls the mold elevation. Drive the driving device 70 .

Next, a process for manufacturing the laminated steel plate 14 from the steel plate material 16 will be described. The configuration of the laminated steel plate manufacturing apparatus 100 and the like to be used is as follows, as shown in FIG. 2 and the like. A mold (10) consisting of an upper mold (2) including an outer shape upper mold (20) and a lower mold (3) including an outer shape lower mold (30) which are paired for punching a steel plate (17) from a steel plate material (16). A rotary drive device 5 for rotating the outer shape upper mold 20 and the outer shape lower mold 30 . An adhesive application device 4 for applying an adhesive 45 to the steel plate 17 including the steel plate material 16 in the upper mold 2 . A steel plate guide path 36 extending downward in the vertical direction in the outer mold 30 . A steel plate aligning heating device 9 for heating the steel plate 17 in the steel plate guide path 36 and vertically below the contour lower mold 30 . In the lower mold 3, the cooling device 6 is provided above the steel plate alignment heating device 9 in the vertical direction.

The laminated steel plate manufacturing method comprises the following first to fourth steps. In the first step, the upper mold 2 is moved downward in the vertical direction, and the steel plate 17 is punched out by the outer shape upper mold 20 and the outer shape lower mold 30 . In the second step, the adhesive 45 is applied to the steel plate 17 by the adhesive application device 4 along with the first step. In the third step, the steel plate aligning and heating device 9 contacts and heats the outer peripheral side surface of the punched steel plate 17 to harden the adhesive 45 applied to the steel plate 17 and to align the steel plates 17 in the stacking direction. In the fourth step, the rotation drive device 5 rotates the outer shape upper mold 20 and the outer shape lower mold 30 by a predetermined angle θ.

The first to third steps are performed each time the steel plate 17 is punched. In the step of applying the adhesive 45 in the second step, as described with reference to FIG. Stop application of 45. Here, the predetermined number of sheets is the number of sheets of the steel sheets 17 to be laminated when manufacturing the laminated steel sheets 14 in advance. This is because the laminated steel sheets 14 having a constant thickness can be manufactured continuously by stopping the second process every time a predetermined number of sheets are punched. The fourth step is performed every time one steel plate 17 is punched or every time a predetermined number of steel plates 17 are punched out. For example, when the fourth step is performed each time one sheet of steel plate 17 is punched, the first to fourth steps are performed continuously. When the first to fourth steps are continuously performed in the laminated steel plate manufacturing apparatus 100 or the like, it is not necessary to input the number of sheets to be punched to indicate the timing of rotation of the outer mold 11 .

Next, a specific example of the step of punching the steel plate 17 will be described with reference to FIGS. 34 and 35. FIG. The example shown in FIG. 34 is an external shape in which the steel plate 17 is not point-symmetrical. In this case, the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 400 of the fourth embodiment correspond. In addition to the T-shaped outer shape, the steel plate 17 has holes 350 at three locations inside. The mold 10 consists of a first auxiliary mold 311 , a second auxiliary mold 312 , a third auxiliary mold 313 and an outline mold 11 . From the first auxiliary mold 311 to the third auxiliary mold 313, a hole 350 is formed in the steel plate 17 excluding the outer shape. The holes 350 have a shape in which three holes are aligned at the position of the vertical bar with respect to the T-shaped outer shape.

The outer mold 11 rotates by a predetermined angle θ each time one steel plate 17 is punched or each time a predetermined number of steel plates 17 are punched. At this time, the positions of the three holes 350 change each time the outer mold 11 rotates. Therefore, from the first auxiliary mold 311 to the third auxiliary mold 313, the holes 350 are formed assuming 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. In other words, the holes 350 are formed not only at the original position but also at positions 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 circular and point-symmetrical. That is, before and after rotating by a predetermined angle θ, the outer shape matches. In this case, the lower outer mold 30 of the outer mold 11 is rotatable around the first central axis C1, while the upper outer mold 20 is rotatable around the first central axis C1. It doesn't have to be. In this example, the mold 10 consists of the first auxiliary mold 311 to the fourth auxiliary mold 314 and the outer mold 11 . In this case, the laminated steel plate manufacturing apparatus 100 of the first embodiment to the laminated steel plate manufacturing apparatus 500 of the fifth embodiment correspond.

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

2 Upper mold 3 Lower mold 4 Adhesive application device 6 Cooling device 7 Heating unit 8 First steel plate holding unit 9 Steel plate alignment heating device 10 Mold 11 External mold 14 Laminated steel plate 16 Steel plate material 17 Steel plate 20 External upper mold 30 Lower mold 35 Cooling guide path 36 Steel plate guide path 40 Nozzle unit 41 Nozzle 42 Nozzle open/close valve 43 Nozzle holder 44 Nozzle elastic member 45 Adhesive 46 Adhesive reservoir 47 Supply pipe 49 Nozzle slide cam 61 Inner cooling part 62 Outer cooling part 63 Outer cooling part fixing base 64 Coolant 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 85 Connecting pin 86 End 87 Gap 88 Steel plate holding block 89 Contact protrusion 96 Drain gutter (first drain gutter)
100 Laminated steel plate manufacturing apparatus 108 Second steel plate holding unit 135 Opening/closing valve hole 140 Nozzle discharge part 142 First nozzle opening/closing valve 143 First nozzle valve elastic member 144 Second nozzle opening/closing valve 145 Second nozzle valve elastic member 146 Third nozzle opening/closing Valve 147 Second adhesive channel 148 First adhesive channel 149 Gap 150 Third adhesive channel 200 Laminated steel plate manufacturing apparatus 210 Actuating member 241 Nozzle engaging portion 244 Nozzle cam engaging surface 245 Nozzle cam concave portion 248 First convex shape Part 249 First concave portion 257 Gap 258 Second convex portion 259 Second concave portion 260 Coolant 263 First coolant reservoir 264 Second coolant reservoir 265 Gap 266 Lower side 267 Upper side 300 Laminated steel plate manufacturing apparatus 350 Hole 400 Laminated steel plate manufacturing device 500 Laminated steel plate manufacturing device 513 Operating slide cam 520 Adhesive coating device 600 Laminated steel plate manufacturing device C1 First central axis C3 Central axis

Claims (15)

In a manufacturing device that manufactures a laminated steel plate by stacking steel plates that are stamped into a predetermined shape from a steel plate material,
In order to punch the steel plate from the steel plate material, a mold consisting of an upper mold and a lower mold that are paired is provided,
The upper mold and the lower mold are relatively movable along the vertical direction,
an adhesive applying device that applies an adhesive to the steel plate including the steel plate material to at least one of the upper mold and the lower mold;
An operating member for operating the adhesive application device,
The adhesive application device includes:
a nozzle unit for discharging the adhesive;
an adhesive reservoir that stores the adhesive;
a supply pipe for supplying the adhesive from the adhesive reservoir to the nozzle unit;
The nozzle unit is
a nozzle forming a nozzle discharge portion for discharging the adhesive onto the steel plate;
When the adhesive reservoir side is defined as the upstream side and the nozzle unit side is defined as the downstream side, there is provided inside the nozzle for selectively supplying the adhesive from the upstream side to the downstream side. and a nozzle open/close valve of
a nozzle holder that supports the nozzle movably in a vertical direction;
The nozzle unit is configured to:
a first state in which the nozzle is located on the downstream side relative to the nozzle holder;
a second state in which the nozzle is located on the upstream side relative to the nozzle holder;
The nozzle is
When the operating member operates in one direction, the nozzle discharge portion contacts the steel plate including the steel plate material in the first state in which the nozzle is positioned on the downstream side relative to the nozzle holder,
Further, when the operating member is actuated in one direction, the nozzle moves to the upstream side relative to the nozzle holder to form the second state, the nozzle opening/closing valve is opened, and the nozzle unit is closed. Forming a channel for the adhesive inside,
When the actuating member operates in the other direction, it moves to the downstream side relative to the nozzle holder to form the first state, the nozzle opening/closing valve is closed, and the adhesive is applied inside the nozzle unit. Laminated steel plate manufacturing equipment that blocks the flow path of When the adhesive application device is in the upper mold,
The actuating member is the upper mold or an actuating slide cam provided on the upper mold and capable of moving in a horizontal direction,
When the adhesive application device is in the lower mold,
the actuating member is the actuating slide cam movable in the horizontal direction provided in the lower mold;
The adhesive applying device is in the upper mold,
When the operating member is the upper mold, the adhesive applying device forms the first state and the second state as the upper mold moves in the vertical direction,
2. The laminated steel plate manufacturing apparatus according to claim 1, wherein when the operating member is the operating slide cam, the first state and the second state are formed by moving the operating slide cam in a horizontal direction. . The nozzle opening/closing valve comprises a first nozzle opening/closing valve, a first nozzle valve elastic member, a second nozzle opening/closing valve, a second nozzle valve elastic member, and a third nozzle opening/closing valve,
The nozzle holder forms therein a first adhesive flow path extending in a direction along the vertical direction,
The nozzle forms therein a second adhesive flow path extending in a direction along the vertical direction and a third adhesive flow path connected to the nozzle discharge part,
In the first state,
The first nozzle opening/closing valve 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,
The second nozzle opening/closing valve closes the second adhesive flow path by an elastic force of the second nozzle valve elastic member,
the third nozzle on-off valve closes the third adhesive flow path in a closed state;
In the second state,
The nozzle moves upstream relative to the first nozzle opening/closing valve against the elastic force of the first nozzle valve elastic member, creating a gap between the nozzle and the first nozzle opening/closing valve. opening the first adhesive channel causes the adhesive to flow into the second adhesive channel;
the second nozzle opening/closing valve is moved to the downstream side relative to the nozzle by the pressure of the adhesive to open the second adhesive flow path;
3. The laminated steel sheet according to claim 1 or 2, wherein the pressure of the adhesive expands the third nozzle on-off valve to open the third adhesive flow path and supply the adhesive to the nozzle discharge part. manufacturing device. The third nozzle opening/closing valve is made of a thin film member having an elastic force,
an on-off valve hole located in a portion corresponding to the center position of the third adhesive channel and having a width smaller than the horizontal width of the third adhesive channel when opened;
The on-off valve hole is
In the first state, which is a state in which pressure is not applied by the adhesive, the adhesive is closed and the adhesive stops flowing from the second adhesive channel to the third adhesive channel;
4. The adhesive according to claim 3, wherein in the second state in which pressure is applied by the adhesive, the adhesive flows from the second adhesive channel to the third adhesive channel in an open state. Laminated steel plate manufacturing equipment. The adhesive application device includes a nozzle elastic member between the nozzle unit and the upper mold or the lower mold on which the adhesive application device is installed among the molds in the vertical direction,
The upper mold or the lower mold on which the adhesive coating device is installed 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 forming the nozzle cam concave part in a part thereof,
The nozzle unit includes a nozzle engaging portion that engages with the nozzle slide cam,
When the upper mold moves downward in the vertical direction,
a state in which the nozzle engaging portion is engaged with the nozzle cam engaging surface other than the nozzle cam concave portion, and the nozzle discharge portion is adjacent to the steel plate including the steel plate material;
The laminated steel sheet according to any one of claims 1 to 4, wherein a state in which the nozzle engaging portion and the nozzle cam recess are engaged and the nozzle discharge portion is separated from the steel plate including the steel plate material can be selected. manufacturing device. The mold includes an outline mold consisting of an outline upper mold and an outline lower mold for punching the outline of the steel plate,
The adhesive is thermosetting,
The outer shape lower mold includes a steel plate guide path extending downward in a direction along the vertical direction centered on the first central axis,
the steel plate guide path guides the steel plate punched by the upper contour mold and the lower contour mold downward in a vertical direction;
A steel plate aligning and heating device that forms a part of the steel plate guide path and heats the steel plate is provided below the outer shape lower mold in the vertical direction,
At least part of the steel plate aligning and heating device contacts and heats the steel plate, and aligns the steel plate in the stacking direction in the steel plate guide path,
The adhesive applied to the steel plates by the adhesive applicator is cured by heating by the steel plate aligning and heating device, and adheres to the steel plates adjacent in at least one of the vertical directions to form laminated steel plates. The laminated steel plate manufacturing apparatus according to any one of claims 1 to 5. The steel plate aligning and heating device includes a heating unit that heats the laminated steel plates,
The heating unit is
a plurality of heating movable parts arranged to surround the steel plate guide path in a direction intersecting the steel plate guide path and movable toward the first central axis;
a heating unit that heats the heating movable unit;
a movable elastic member that moves the heating movable portion in a direction that intersects with the first central axis;
A heating movable part holder for guiding the movement of the heating movable part,
The heating movable part holder is spaced apart from the outer shape lower mold in the vertical direction,
7. The laminated steel plate manufacturing apparatus according to claim 6, wherein the movable heating portion heats the outer peripheral portion of the steel plate by contacting the outer peripheral portion of the steel plate from a plurality of directions, and further adjusts the position of the steel plate with respect to the steel plate guide path. The steel plate aligning and heating device further comprises a first steel plate holding unit for adjusting the position of the steel plate below the heating unit in the vertical direction,
The heating movable part holder has a connecting hole that engages with the first steel plate holding unit,
The first steel plate holding unit includes:
a steel plate holding block forming part of the steel plate guideway;
a steel plate holding movable part that can move in a direction that intersects with the first central axis with respect to the steel plate holding block;
a steel plate holding elastic member that applies an elastic force in a direction toward the first central axis to the steel plate holding movable portion;
A connecting pin that engages with the connecting hole,
The laminated steel plate manufacturing apparatus according to claim 7, wherein the steel plate holding movable portion presses and holds the outer peripheral portion of the laminated steel plate by pressure of the steel plate holding elastic member. The steel plate aligning and heating device further comprises a second steel plate holding unit below the heating unit in the vertical direction for holding the steel plate and restricting it from falling,
The heating movable part holder has a connecting hole that engages with the second steel plate holding unit,
The second steel plate holding unit,
a steel plate holding block forming part of the steel plate guideway;
a contact protrusion in the steel plate holding block that contacts the steel plate or the laminated steel plate;
A connecting pin that engages with the connecting hole,
The laminated steel plate manufacturing apparatus according to claim 7, wherein the contact protrusion contacts and holds an outer peripheral portion of the laminated steel plate. A part of the lower end of the lower outer mold in the vertical direction and a part of the upper end of the movable heating part holder of the steel plate aligning and heating device form a first convex part on the lower outer mold, forming a first concave portion corresponding to the first convex portion in the heating movable part holder;
A part of the lower end portion of the heating movable part holder in the vertical direction and a part of the upper end part of the steel plate holding block form a second convex portion on the steel plate holding block, forming a second concave portion corresponding to the two convex portions;
the outer shape lower mold and the heating movable part holder are engaged by contacting each other only in a direction intersecting with the first central axis, and A lower surface forming the lower end of the lower outer mold and an upper surface forming the upper end of the heating movable part holder are spaced apart in the vertical direction, and a portion of the steel plate guide path formed by the lower outer mold and the the central position of the portion formed by the heating movable part holder is aligned with the first central axis,
The movable heating part holder and the steel plate holding block are engaged by contacting the second convex part and the second concave part, and the part of the steel plate guide path formed by the movable heating part holder 10. The laminated steel plate manufacturing apparatus according to claim 8 or 9, wherein a central position of the portion formed by the steel plate holding block and the portion formed by the steel plate holding block coincides with the first central axis. a plurality of the connecting pins are arranged on the same circumference around 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 greater 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 such that the width in the circumferential direction is equal to or greater than the diameter of the connecting pin, and the gap between them is: It is a relationship of the degree of fine rotation of the clearance fit,
When the heating part heats the heating movable part and the heating movable part holder thermally expands,
the connecting hole engages with the connecting pin at an end on the first central axis side in a direction intersecting with the first central axis and in a circumferential direction about the first central axis;
The steel plate holding block and the heating movable part holder move relative to each other about the first central axis in a direction intersecting the first central axis and in a circumferential direction about the first central axis. The laminated steel plate manufacturing apparatus according to any one of claims 8 to 10, which prevents The connecting hole is
In a direction intersecting with the first central axis,
8. The end portion on the side of the first central axis is an opening having an arc shape formed with a radius equal to or greater than the radius of the connecting pin, and the width in the circumferential direction increases with increasing distance from the first central axis. 12. The laminated steel plate manufacturing apparatus according to any one of 11 to 11. The lower mold has a cooling device above the steel plate alignment and heating device in the vertical direction,
The cooling device
a cooling guideway forming part of the steel plate guideway;
an inner cooling part fixed to the outer peripheral side of the cooling guide path;
an outer cooling part located on the outer peripheral side of the inner cooling part and directly or indirectly fixed to the lower mold;
a coolant circulation section formed between the inner cooling section and the outer cooling section;
A coolant supply unit that supplies coolant to the coolant circulation unit,
The laminated steel plate manufacturing apparatus according to any one of claims 6 to 12, wherein the coolant can circulate on the outer periphery of the inner cooling section. The cooling device further
The outer cooling part has a first opening and a drain gutter,
Equipped with an outer cooling part fixing base directly or indirectly fixed to the lower mold,
The outer cooling part is fixed to the outer cooling part fixing base,
The outer cooling part fixing base forms a second opening,
The coolant circulation unit forms a closed space except for the first opening and the drain gutter,
the coolant supply unit includes a coolant cooling unit and at least two cooling pipes connected to the coolant cooling unit to supply the coolant;
at least one of the cooling pipes is connected to the coolant circulation unit through the first opening, and another of the cooling pipes is connected to the coolant circulation unit through the second opening;
The coolant, which has been raised in temperature by cooling the inner cooling portion in contact with the cooling guide path, passes through the second opening from the drain gutter and is cooled in the coolant cooling portion. can be circulated by supplying to the coolant circulation unit through a pipe,
The laminated steel plate manufacturing apparatus according to claim 13, wherein the coolant can circulate on the outer periphery of the inner cooling section. The lower mold is
The inner cooling section is connected to the coolant circulation section at a vertical upper end of the inner cooling section and has a gap in the circumferential direction that is larger than the gap between the inner cooling section and the outer cooling section in the coolant circulation section. a groove-shaped first coolant reservoir having
In the outer cooling section fixing base, a gap is provided below the inner cooling section in the vertical direction, is continuous with the coolant circulation section, and is larger than the gap between the inner cooling section and the outer cooling section. 15. The laminated steel plate manufacturing apparatus according to claim 14, comprising a groove-shaped second coolant reservoir.

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