JP6330713B2 - Laminated core manufacturing apparatus and laminated core manufacturing method - Google Patents

Description

  The present invention relates to a laminated iron core manufacturing apparatus and a laminated iron core manufacturing method for manufacturing a laminated iron core.

  Conventionally, a high-permeability steel sheet such as an electromagnetic steel sheet has been used as a laminated core manufacturing material, that is, a laminated core material. In general, in the manufacture of a laminated iron core, a thin steel plate having a high magnetic permeability (for example, an electromagnetic steel plate having a reduced thickness) is fed into a press as a laminated iron core material, and is punched into an iron core by the press. Thus, a plurality of iron core-shaped steel plate structures (hereinafter referred to as punched bodies) punched by a press machine are laminated and integrated in the thickness direction. As a result, a laminated core such as an electric motor core is manufactured.

  In recent years, electric motors using permanent magnets and inverters with high magnetic flux density have been expected to increase efficiency with new laminated core materials due to demands for energy saving. In an electromagnetic steel sheet which is a laminated iron core material, it is required to reduce the plate thickness for the purpose of reducing eddy current loss of the laminated iron core which occurs during high-speed rotation of an electric motor or the like. Along with this, there is an increasing demand for electrical steel sheets having a plate thickness of 0.35 [mm] or less.

  As described above, there is a tendency to further reduce the thickness of the electromagnetic steel sheet with the aim of further increasing the efficiency of the electric motor using the laminated iron core. However, further thinning of the thickness of the electromagnetic steel sheet leads to an increase in the number of laminated electromagnetic steel sheets necessary for manufacturing the laminated iron core. As a result, the time required for punching the electromagnetic steel sheet as the laminated core material becomes long, resulting in a problem that the production efficiency of the laminated core is lowered.

  As a prior art for solving such a problem, for example, in Patent Document 1, before a step of punching out an electromagnetic steel sheet by a press machine, portions of the plurality of electromagnetic steel sheets that are not used for the motor core are fixed to each other. And the manufacturing method of the electric motor core which performs the process of closely_contact | adhering these several electromagnetic steel plates is disclosed. Patent Document 2 discloses a method in which an adhesive layer is formed so as not to enclose a non-adhesive region between a plurality of electromagnetic steel sheets, and the plurality of electromagnetic steel sheets are partially bonded by the formed adhesive layer.

  Patent Document 3 discloses a method in which an inorganic adhesive mainly composed of alumina or silica is applied to a plurality of electromagnetic steel sheets, and the plurality of electromagnetic steel sheets are bonded. Patent Document 4 discloses a method of bonding a plurality of electrical steel sheets with an adhesive layer made of an organic resin having a glass transition temperature or a softening temperature of 50 [° C.] or higher.

  Further, in Patent Document 5, a plurality of electromagnetic steel sheets are laminated together by an adhesive film interposed between a plurality of electromagnetic steel sheets to form a multilayer laminated steel sheet, and this multilayer laminated steel sheet is punched out by a press machine and laminated. A method of manufacturing an iron core is disclosed. In Patent Document 6, two steel plates having different thicknesses at both ends in a direction perpendicular to the rolling direction are overlapped so that the end portions on the thick side and the thin side are adjacent to each other. In addition, a method of manufacturing a laminated iron core by sequentially laminating punched bodies (core members) formed in a predetermined shape by a punching process simultaneously with a press machine so that the rolling directions coincide with each other is disclosed.

JP 2003-153503 A Japanese Patent Application Laid-Open No. 2003-264962 JP 2005-332976 A Japanese Patent No. 4581228 JP 2005-191033 A JP 2003-189515 A

  However, in the above-described prior art, a plurality of laminated core materials stacked to be simultaneously punched by a press machine are fixed in a direction perpendicular to the rolling direction (that is, the width of the laminated core material) before being fixed by an adhesive layer or caulking. The laminated core material may collide with the inner wall of the press mold, or the laminated core material may come off from the press mold.

  In particular, when a laminated core is manufactured by superimposing a plurality of laminated core materials and punching them continuously, the thicknesses of the laminated core materials are as shown in Patent Document 6 in the width direction. If it is inclined, the following problems may occur. That is, when a plurality of laminated core materials are superposed, the superposed laminated core materials are misaligned in opposite directions along the width direction of the laminated core material due to their own weight or a load received from a pinch roll. Problems arise. As a result, there is a possibility that a trouble such as the above-described laminated core material collides with the inner wall of the mold or the laminated core material is detached from the mold (hereinafter, referred to as a trouble due to the deviation in the width direction of the laminated core material). is there.

  The present invention has been made in view of the above circumstances, and a laminated core manufacturing apparatus capable of suppressing as much as possible a shift in the width direction in a plurality of laminated core materials stacked to produce a laminated core. It aims at providing the manufacturing method of a laminated iron core.

  The inventors of the present invention have made extensive studies in order to solve the above-described problems. As a result, the present inventors, in the step before superimposing a plurality of laminated core materials, the position (hereinafter referred to as an edge portion) of the end in the width direction (hereinafter referred to as an edge portion) in each of the plurality of laminated core materials. It is found that the plurality of laminated core materials can be superposed and fed into a punching die in a state where the edge positions are aligned by correcting and aligning the edge positions as appropriate) It came to develop. That is, in order to solve the above-described problems and achieve the object, a laminated core manufacturing apparatus according to the present invention is a laminated core manufacturing apparatus that manufactures a laminated core by laminating and integrating a plurality of punched bodies of laminated core materials. A plurality of edge position detectors for detecting edge positions in the width direction of each of the laminated core materials of the plurality of laminated core materials respectively conveyed along different conveyance paths, and the plurality of laminated core materials. A plurality of edge position correcting sections that respectively correct the edge positions; a plurality of edge positions detected by the plurality of edge position detecting sections; and a reference edge position common to each laminated core material. A control unit that controls the correction of the edge position by the plurality of edge position correction units, and the edge position is corrected by the plurality of edge position correction units so as to reduce the respective deviation amounts of Multiple laminated iron cores An overlapping portion that overlaps the material, and a punching processing portion that punches the plurality of laminated core materials stacked by the overlapping portion to obtain the punched body, and the plurality of edge position detection portions include: The edge positions of the plurality of laminated core materials that are installed immediately before the entry side of the overlapped portion and have arrived immediately before the entry side are respectively detected.

  The laminated core manufacturing apparatus according to the present invention is characterized in that, in the above invention, the plurality of edge position correcting sections are respectively installed immediately before the plurality of edge position detecting sections.

  Moreover, the laminated core manufacturing apparatus according to the present invention includes a plurality of feeding rolls that respectively feed the plurality of laminated core materials to the plurality of edge position detection units in the above-described invention, and the plurality of feeding rolls include: One or more are installed for each of the transport paths, and the plurality of edge position correction units are installed in front of the plurality of feed rolls, respectively.

  In the laminated core manufacturing apparatus according to the present invention, in the above invention, each of the plurality of edge position correcting portions is a rotating roll body that sends the laminated core material to the overlapping portion side for each of the transport paths. The edge position of the laminated core material is corrected by tilting the roll axis of the rotary roll body with respect to the horizontal direction with the feeding direction of the laminated core material as the center of rotation.

  Further, in the laminated core manufacturing apparatus according to the present invention, in the above invention, the plurality of edge position detection units use at least one of an optical method, a laser method, and an ultrasonic method. Each of the edge positions of the iron core material is detected.

  Moreover, the laminated core manufacturing method according to the present invention is a laminated core manufacturing method in which a plurality of laminated core material punched bodies are laminated and integrated to produce a laminated core, wherein the plurality of the cores are conveyed along different conveying paths. An edge position detecting step for detecting an edge position in the width direction of each laminated core material of the laminated core material, each of the plurality of edge positions detected by the edge position detecting step, and each of the laminated core materials The edge position correcting step for correcting the edge position of each of the plurality of laminated core materials so as to reduce the amount of deviation from the common reference edge position, and the edge position correcting step, the edge position correcting step. A superposition step of superposing the plurality of laminated core materials whose positions are corrected, and a plurality of the laminated core materials superposed by the superposition step are punched before A punching step for obtaining a punched body, wherein the edge position detecting step includes the edge positions of the plurality of laminated core materials that have arrived immediately before entering the overlapping portion where the plurality of laminated core materials are superimposed. , Each of which is detected.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the shift | offset | difference of the width direction in the some laminated core material laminated | stacked so that a laminated iron core may be manufactured can be suppressed as much as possible.

FIG. 1 is a diagram illustrating a configuration example of a laminated core manufacturing apparatus according to the first embodiment of the present invention. FIG. 2 is a diagram for explaining the correction of the edge position of the laminated core material by the edge position correction unit according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating the operation of the edge position correcting unit that corrects the edge position of the laminated core material in the first embodiment of the present invention. FIG. 4 is a diagram showing a specific example of a configuration of a laminated core manufacturing apparatus corresponding to the number of laminated core materials. FIG. 5 is a flowchart showing an example of the method for manufacturing a laminated core according to the first embodiment of the present invention. FIG. 6 is a diagram illustrating a configuration example of the laminated core manufacturing apparatus according to the second embodiment of the present invention. FIG. 7 is a diagram illustrating a configuration example of the laminated core manufacturing apparatus according to the third embodiment of the present invention. FIG. 8 is a diagram for explaining the correction of the edge position of the laminated core material by the payout portion according to the third embodiment of the present invention. FIG. 9 is a diagram illustrating a configuration example of a laminated core manufacturing apparatus according to the fourth embodiment of the present invention. FIG. 10 is a diagram for explaining the correction of the edge position of the laminated core material by the edge position correction unit according to the fourth embodiment of the present invention. FIG. 11 is a diagram illustrating a configuration example of the laminated core manufacturing apparatus according to the first comparative example. FIG. 12 is a diagram showing the evaluation results of the edge position displacement amount of the laminated core material after each punching test of Invention Example 1 and Comparative Examples 1 and 2. FIG. 13 is a diagram showing a correlation between the number of punching strokes for a laminated body of laminated core materials and the amount of edge position deviation of each laminated core material after punching. FIG. 14 is a diagram showing the evaluation results of the edge position shift amount of the laminated core material after each punching test of Examples 1, 3, and 4 of the present invention. FIG. 15 is a diagram showing a correlation between the number of laminated core materials and the variation in punching dimensions.

  Exemplary embodiments of a laminated core manufacturing apparatus and a laminated core manufacturing method according to the present invention will be explained below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiment. Moreover, the drawings are schematic, and it should be noted that the relationship between the dimensions of each element, the ratio of each element, and the like may differ from the actual ones. Even between the drawings, there are cases in which portions having different dimensional relationships and ratios are included. In each drawing, the same numerals are given to the same component.

(Embodiment 1)
First, the configuration of the laminated core manufacturing apparatus according to the first embodiment of the present invention will be described. FIG. 1 is a diagram illustrating a configuration example of a laminated core manufacturing apparatus according to the first embodiment of the present invention. As shown in FIG. 1, the laminated core manufacturing apparatus 1 according to the first embodiment includes n steel sheets 15-1 to 15-n (hereinafter referred to as “n” is an integer of 2 or more, the same shall apply hereinafter) as a laminated core material. , Abbreviated as “plural steel plates 15” as appropriate), and a plurality of feeding sections 2-1 to 2-n that respectively feed out a plurality of feeding rolls 3-1 to send out the plurality of steel plates 15 along the respective conveying paths. 3-n. In addition, the laminated core manufacturing apparatus 1 detects a plurality of edge position correction units 4-1 to 4-n that respectively correct the edge positions of the plurality of steel plates 15 and a plurality of edge positions of the plurality of steel plates 15. Edge position detectors 5-1 to 5-n. Furthermore, the laminated core manufacturing apparatus 1 includes a pinch roll 6 that superimposes a plurality of steel plates 15, a press machine 7 that punches the plurality of superposed steel plates 15, and a plurality of edge position correction units 4-1 to 4-. and a control unit 8 for controlling the operation of n.

  The payout units 2-1 to 2-n are facilities for paying out the plurality of steel plates 15, respectively. Specifically, each of the payout units 2-1 to 2-n is configured using a payoff reel or the like, and is installed at the entrance end of the laminated core manufacturing apparatus 1. The payout units 2-1 to 2-n receive n (n pieces in the case of a coil) steel plates 15-1 to 15-n as a plurality of laminated core materials used for the production of the laminated iron cores, respectively. Each of the steel plates 15-1 to 15-n is sequentially paid out for each conveyance path.

  In the first embodiment, each of the n steel plates 15-1 to 15-n is a thin plate-like electrical steel plate (non-oriented electrical steel plate or the like) having a high magnetic permeability. As shown in FIG. 1, these steel plates 15-1 to 15-n are respectively received by the payout portions 2-1 to 2-n in a coiled state.

  The feed rolls 3-1 to 3-n are facilities for sending a plurality of steel plates 15 from the upstream side to the downstream side of the transport path. Specifically, as shown in FIG. 1, the feed rolls 3-1 to 3-n are respectively installed in the subsequent stage of the payout units 2-1 to 2-n. The feed rolls 3-1 to 3-n transfer the steel plates 15-1 to 15-n delivered from the delivery units 2-1 to 2-n to the edge position correcting units 4-1 to 4-n, respectively. Sequentially sent by transport route.

  The edge position correcting units 4-1 to 4-n function as a plurality of edge position correcting units that respectively correct the edge positions in the width direction of the respective laminated core materials of the plurality of laminated core materials. Specifically, the edge position correction units 4-1 to 4-n are configured using a feed roll or the like that sequentially feeds the laminated core material from the upstream side to the downstream side of the transport path, as shown in FIG. Are installed immediately before the edge position detectors 5-1 to 5-n. For example, the edge position correcting unit 4-1 is installed at a position subsequent to the feed roll 3-1 and immediately before the edge position detecting unit 5-1 in the conveyance path of the steel plate 15-1. The edge position correcting unit 4-n is installed at a position subsequent to the feed roll 3-n and immediately before the edge position detecting unit 5-n in the conveyance path of the steel plate 15-n. That is, in the first embodiment, a feed roll is provided between the edge position correction units 4-1 to 4-n and the edge position detection units 5-1 to 5-n as shown in FIG. There is no equipment that affects the transport of laminated core materials such as

  Such edge position correction units 4-1 to 4-n have functions as feed rolls for feeding the steel plates 15-1 to 15-n to the edge position detection units 5-1 to 5-n, and steel plates, respectively. It also has a correction function for correcting the edge positions of 15-1 to 15-n. In the first embodiment, each of the edge position correcting units 4-1 to 4-n has a rotating roll body that sends the laminated core material to the pinch roll 6 side for each conveyance path. For example, the edge position correcting unit 4-1 includes a rotating roll body that sends the steel plate 15-1 to the pinch roll 6 side along the conveyance path of the steel plate 15-1. The edge position correcting unit 4-n has a rotating roll body that sends the steel plate 15-n to the pinch roll 6 side along the conveyance path of the steel plate 15-n. Each of the edge position correcting units 4-1 to 4-n is a roll of its own rotating roll body, with the feeding direction of the laminated core material (see the thick line arrow in FIG. 1) by its own rotating roll body as the rotation center. The axis is tilted with respect to the horizontal direction, thereby correcting the edge position of the laminated core material. In this way, the edge position correction units 4-1 to 4-n correct the edge positions of the steel plates 15-1 to 15-n as necessary, while these steel plates 15-1 to 15-n. Are sequentially sent to the pinch roll 6 side (specifically, toward the edge position detection units 5-1 to 5-n).

  The edge position detectors 5-1 to 5-n each detect a plurality of edge positions in the width direction in each laminated core material of a plurality of laminated core materials respectively conveyed along different conveyance paths. Functions as a detection unit. Specifically, as shown in FIG. 1, the edge position detectors 5-1 to 5-n are installed immediately before the entrance side of the pinch roll 6. That is, as shown in FIG. 1, there is no facility that affects the conveyance of the laminated core material such as a feed roll between the edge position detection units 5-1 to 5-n and the pinch roll 6. Moreover, each position (for example, the position which detects the edge position of laminated core material) of the edge position detection parts 5-1 to 5-n installed in this way, and the position (for example, a plurality of laminated cores) of the pinch roll 6 As shown in FIG. 1, the separation distance from the position where the materials are overlapped is a distance L. This distance L is such a short distance that each of the steel plates 15-1 to 15-n can be conveyed without changing its edge position in the width direction. The edge position detectors 5-1 to 5-n detect the edge positions of the steel plates 15-1 to 15-n that have arrived immediately before the entry side at the position immediately before the entry side of the pinch roll 6, respectively. To do. In each case, the edge position detection units 5-1 to 5-n transmit the detected edge positions of the steel plates 15-1 to 15-n to the control unit 8.

  In the first embodiment, the edge position detection units 5-1 to 5-n use the at least one of an optical method, a laser method, and an ultrasonic method to each of the steel plates 15-1 of the plurality of steel plates 15. The edge position in the width direction at ˜15-n is detected. That is, the detection method of the edge position detection units 5-1 to 5-n may be any of an optical method, a laser method, and an ultrasonic method, or a method combining at least two of these. There may be. Further, the detection method of the edge position detection units 5-1 to 5-n may be the same or different between the edge position detection units 5-1 to 5-n.

  The pinch roll 6 functions as an overlapping portion that overlaps a plurality of steel plates 15 as the laminated core material. Specifically, as shown in FIG. 1, the pinch roll 6 is configured using a pair of upper and lower rotating rolls and the like, and is installed between the edge position detection units 5-1 to 5 -n and the press machine 7. Is done. The pinch roll 6 sandwiches the plurality of steel plates 15 whose edge positions have been corrected by the edge position correction units 4-1 to 4-n described above from above and below, and thereby causes the plurality of steel plates 15 to move in the thickness direction. Overlapping. In this way, the pinch roll 6 obtains a superposed body 18 of a plurality of steel plates 15. In the first embodiment, the stacked body 18 is a laminated structure in a state where the steel plates 15-1 to 15-n whose edge positions are corrected are stacked in the thickness direction. As described above, the pinch roll 6 sequentially sends the overlapped body 18 toward the press machine 7 while overlapping the plurality of steel plates 15.

  The press machine 7 functions as a punching unit that punches a plurality of steel plates 15 (that is, the stacked body 18) overlapped by the pinch roll 6 to obtain a punched body of the laminated core material. Specifically, as shown in FIG. 1, the press machine 7 includes an upper die 7 a and a lower die 7 b as die for punching, and is installed at the rear stage (preferably immediately after) the pinch roll 6. . The press machine 7 receives the overlapped body 18 in the mold, that is, between the upper mold 7a and the lower mold 7b, and sandwiches the received stacked body 18 between the upper mold 7a and the lower mold 7b. to bound. Next, the press machine 7 simultaneously punches out the stacked body 18 in the thickness direction by the upper mold 7a and the lower mold 7b.

  By the punching process described above, the press machine 7 obtains a punched body of the laminated core material punched into the target core shape from the steel plates 15-1 to 15-n forming the stacked body 18. Each time the press machine 7 receives the overlapped body 18 from the pinch roll 6 in the mold, the punched body of the target iron core shape is continuously formed from the steel plates 15-1 to 15-n forming the received overlapped body 18. As a result, a plurality of punched bodies having a target iron core shape are obtained. The press machine 7 stacks a plurality of punched bodies obtained in this way so that the rolling directions of the steel plates 15-1 to 15-n as raw materials are aligned in the same direction, and the upper die 7a and the lower die 7b. The desired laminated iron core is manufactured by the integration of the above.

  The control unit 8 controls the edge position correcting operation of the edge position correcting units 4-1 to 4-n described above. Specifically, in the first embodiment, the control unit 8 detects the edge positions (hereinafter referred to as a plurality of edge positions) of the plurality of steel plates 15 detected by the edge position detection units 5-1 to 5-n. Each deviation amount is appropriately grasped and a predetermined reference edge position. Here, the reference edge position is a reference edge position common to the steel plates 15-1 to 15-n of the plurality of steel plates 15. The reference edge position avoids, for example, troubles between the upper mold 7a and lower mold 7b of the press 7 and the stacked body 18 of the plurality of steel plates 15 (troubles caused by misalignment of the laminated core material). As such, it is preset. The control unit 8 reduces each shift amount between each of the plurality of edge positions acquired from the edge position detection units 5-1 to 5-n and the above-described reference edge position (desirably, a zero value). In this manner, the correction of the edge positions of the steel plates 15-1 to 15-n by the edge position correction sections 4-1 to 4-n is controlled.

  Next, the correction of the edge position of the laminated core material in the first embodiment will be specifically described. FIG. 2 is a diagram for explaining the correction of the edge position of the laminated core material by the edge position correction unit according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating the operation of the edge position correcting unit that corrects the edge position of the laminated core material in the first embodiment of the present invention. In the following, the edge position detection unit 4-1 is exemplified on behalf of the edge position correction units 4-1 to 4 -n, and the stacking by the edge position correction unit 4-1 is performed with reference to FIGS. The correction of the edge position of the iron core material will be described. In addition, the correction function of the edge position of the laminated core material by the rest (for example, the edge position correction part 4-n) of the edge position correction parts 4-1 to 4-n excluding the edge position correction part 4-1. , Except that the correction target is different, is the same as the edge position correction unit 4-1.

  As illustrated in FIGS. 2 and 3, the edge position correcting unit 4-1 includes a rotating roll body that sends the steel plate 15-1 to the pinch roll 6 side along the conveyance path of the steel plate 15-1. The edge position correcting unit 4-1 sequentially feeds the steel plate 15-1 in the longitudinal direction D 2 by the rotating action of the rotary roll body, and the edges 16 a and 16 b of the steel plate 15-1 in the width direction D 1. The positions, that is, the edge positions Pa and Pb are corrected.

  Specifically, as shown in FIGS. 2 and 3, the edge position correcting unit 4-1 has a roll shaft 4 a of a rotating roll body perpendicular to both the feeding direction and the thickness direction of the steel plate 15-1. . The edge position correction unit 4-1 rotates its own rotating roll body with the roll shaft 4 a parallel to the horizontal direction at the normal time when the edge positions Pa and Pb are not corrected. On the other hand, when correcting the edge positions Pa and Pb, the edge position correcting section 4-1 tilts the roll shaft 4 a with the feeding direction of the steel plate 15-1 (see the bold arrow in FIG. 2) as the rotation center. By doing so, as shown in FIG. 3, the roll shaft 4a is inclined with respect to the horizontal direction. Thereby, the edge position correction | amendment part 4-1 inclines its rotating roll body similarly to the roll axis | shaft 4a, and corrects edge part position Pa and Pb of the steel plate 15-1 to reference | standard edge part position SPa and SPb. .

  Here, the reference edge positions SPa and SPb and the reference center position CP shown in FIG. 2 are preset according to the positions of the upper mold 7a and the lower mold 7b of the press machine 7, for example. Specifically, the reference edge positions SPa and SPb are the references of both edges of the steel plates 15-1 to 15-n in the width direction D1 (for example, both edges 16a and 16b of the steel plate 15-1 shown in FIG. 2). It is the edge part position which becomes and is common to the steel plates 15-1 to 15-n. Such reference edge positions SPa and SPb are optimum edge positions of the superposed body 18 of the steel plates 15-1 to 15-n carried between the upper mold 7a and the lower mold 7b of the press machine 7. Is set to match. Further, the reference center position CP is a position serving as a reference for the central portion in the width direction D1 of the steel plates 15-1 to 15-n, and is common to the steel plates 15-1 to 15-n. Such a reference center position CP matches the center position in the width direction D1 of the overlapped body 18 in a state where both edges are aligned with the optimum edge positions corresponding to the reference edge positions SPa and SPb. Is set.

  The edge position correcting unit 4-1 is controlled by the control unit 8 shown in FIG. 1 to control the tilt direction and tilt angle of the roll shaft 4 a, and tilts the rotating roll body together with the roll shaft 4 a based on this control. The edge position correcting section 4-1 slides and displaces the steel sheet 15-1 in the width direction D 1 by the edge position displacement amount ΔWa along the inclined rotating roll body. Here, the edge position shift amount ΔWa is a shift amount between each of the edge positions of the steel plates 15-1 to 15-n and the reference edge position common to the steel plates 15-1 to 15-n (for example, FIG. 2). The amount of deviation between the edge position Pa of the steel plate 15-1 and the reference edge position SPa). The edge position correcting unit 4-1 determines one edge position Pa in the steel sheet 15-1 as one reference by the sliding displacement with respect to the width direction D 1 of the steel sheet 15-1 corresponding to the edge position deviation amount ΔWa. Correction to the edge position SPa. As a result, the other edge position Pb of the steel plate 15-1 is corrected to the other reference edge position SPb, and the center position in the width direction D1 of the steel plate 15-1 is corrected to the reference center position CP. .

  In the first embodiment, the width direction D1 is the direction of the plate width in each of the plurality of steel plates 15 as the laminated core material. The longitudinal direction D2 is the longitudinal direction of each of the plurality of steel plates 15, that is, the rolling direction of each of the steel plates 15-1 to 15-n. These width direction D1 and longitudinal direction D2 are perpendicular to each other as shown in FIG.

  Next, the configuration of the laminated core manufacturing apparatus 1 corresponding to the number of laminated core materials will be described. FIG. 4 is a diagram showing a specific example of a configuration of a laminated core manufacturing apparatus corresponding to the number of laminated core materials. In FIG. 4, in order to simply show the specific configuration of the laminated core manufacturing apparatus 1 corresponding to the number of laminated core materials, the above-described control unit 8 is not shown. Hereinafter, with reference to FIG. 4, the configuration of the laminated core manufacturing apparatus 1 according to the first embodiment is specifically illustrated by exemplifying the case where the number of laminated core materials is four (that is, integer n = 4). explain.

  As shown in FIG. 4, when the plurality of laminated core materials are four steel plates 15-1 to 15-4, the laminated core manufacturing apparatus 1 has the number of these steel plates 15-1 to 15-4 (= 4). Corresponding to the payout units 2-1 to 2-4, the feed rolls 3-1 to 3-4, the edge position correcting units 4-1 to 4-4, and the edge position detecting units 5-1 to -5. 5-4. Moreover, the laminated core manufacturing apparatus 1 is provided with the pinch roll 6, the press machine 7, and the control part 8 (refer FIG. 1) as mentioned above irrespective of the number of these steel plates 15-1 to 15-4. .

  In the laminated core manufacturing apparatus 1 shown in FIG. 4, the steel plates 15-1 to 15-4 of the plurality of steel plates 15 are different from each other until reaching the pinch roll 6 from the payout units 2-1 to 2-4. It is conveyed along the route. In other words, the steel plate 15-1 passes through the delivery part 2-1, the feed roll 3-1, the edge position correction part 4-1, and the edge position detection part 5-1 in this order in the conveyance path from the pinch roll 6. It is sequentially conveyed along. The steel plate 15-2 passes along the conveyance path from the payout unit 2-2 to the pinch roll 6 through the feed roll 3-2, the edge position correction unit 4-2, and the edge position detection unit 5-2 in this order. It is conveyed sequentially. The steel plate 15-3 passes along the conveyance path from the payout unit 2-3 to the pinch roll 6 through the feed roll 3-3, the edge position correcting unit 4-3, and the edge position detecting unit 5-3 in this order. It is conveyed sequentially. The steel plate 15-4 passes along the conveyance path from the payout unit 2-4 to the pinch roll 6 through the feed roll 3-4, the edge position correcting unit 4-4, and the edge position detecting unit 5-4 in this order. It is conveyed sequentially.

  Specifically, after the steel sheet 15-1 is paid out by the paying-out part 2-1, it is sent out to the edge position correcting part 4-1 by the feed roll 3-1. Subsequently, the steel plate 15-1 is sent to the edge position detection unit 5-1 while the edge position is appropriately corrected by the edge position correction unit 4-1. Next, the edge position of the steel plate 15-1 is detected by the edge position detection unit 5-1, and then reaches the position of the pinch roll 6.

  The steel plate 15-2 is delivered by the delivery unit 2-2 and then sent to the edge position correction unit 4-2 by the feed roll 3-2. Subsequently, the steel plate 15-2 is sent to the edge position detection unit 5-2 while the edge position is appropriately corrected by the edge position correction unit 4-2. Next, the edge position of the steel plate 15-2 is detected by the edge position detection unit 5-2, and then reaches the position of the pinch roll 6.

  The steel plate 15-3 is delivered by the delivery unit 2-3 and then sent to the edge position correcting unit 4-3 by the feed roll 3-3. Subsequently, the steel plate 15-3 is sent to the edge position detection unit 5-3 while the edge position is appropriately corrected by the edge position correction unit 4-3. Next, the edge position of the steel plate 15-3 is detected by the edge position detection unit 5-3, and then reaches the position of the pinch roll 6.

  The steel plate 15-4 is delivered by the delivery unit 2-4 and then sent to the edge position correction unit 4-4 by the feed roll 3-4. Subsequently, the steel plate 15-4 is sent to the edge position detecting unit 5-4 while the edge position is appropriately corrected by the edge position correcting unit 4-4. Next, the edge position of the steel plate 15-4 is detected by the edge position detection unit 5-4, and then reaches the position of the pinch roll 6.

  As described above, the steel plates 15-1 to 15-4 that have reached the position of the pinch roll 6 are superposed in the thickness direction by the pinch roll 6, and are sent to the press machine 7 as a superposed body 18. As described above, the superposed body 18 of these four steel plates 15-1 to 15-4 is continuously punched into a target iron core shape by the upper mold 7a and the lower mold 7b of the press machine 7. As a result, a plurality of punched bodies of the laminated core material having the target iron core shape are obtained, and the plurality of punched bodies are stacked in the thickness direction and integrated to produce a desired laminated core.

  In the laminated core manufacturing apparatus 1 corresponding to the four laminated core materials as shown in FIG. 4, the payout units 2-1 to 2-4, the feed rolls 3-1 to 3-4, and the edge position correcting unit 4-1. 4-4 and the edge position detectors 5-1 to 5-4 have the same structure and function as the payout unit 2-1 in the laminated core manufacturing apparatus 1 corresponding to the n laminated core materials shown in FIG. ˜2-n, feed rolls 3-1 to 3-n, edge position correcting sections 4-1 to 4-n, and edge position detecting sections 5-1 to 5-n, respectively.

  Next, the laminated core manufacturing method according to the first embodiment of the present invention will be described. FIG. 5 is a flowchart showing an example of the method for manufacturing a laminated core according to the first embodiment of the present invention. The laminated core manufacturing method according to the first exemplary embodiment of the present invention performs a plurality of laminated core materials by sequentially performing the processes (steps) of steps S101 to S105 shown in FIG. The laminated cores are laminated and integrated to produce a laminated core.

  That is, in the method of manufacturing a laminated core according to the first embodiment of the present invention, the laminated core manufacturing apparatus 1 has, as shown in FIG. 5, each laminated core of a plurality of laminated core materials that are respectively conveyed along different conveyance paths. Each edge position in the width direction of the material is detected (step S101).

  In step S101, the edge position detectors 5-1 to 5-n detect the edge positions in the width direction of the respective steel plates 15-1 to 15-n of the plurality of steel plates 15 as the laminated core material. At this time, the edge position detection units 5-1 to 5-n of the steel plates 15-1 to 15-n that have arrived immediately before the entrance side of the pinch roll 6 as an overlapping unit that overlaps a plurality of laminated core materials. The edge position is detected using at least one of optical, laser, and ultrasonic methods. For example, the edge position detection unit 5-1 uses any of optical, laser, and ultrasonic methods, and the steel plate 15-1 illustrated in FIG. The position of the edge 16a (edge position Pa) and the position of the edge 16b (edge position Pb) in the width direction D1 are detected. The edge position detection units 5-1 to 5-n transmit the electrical signals indicating the detection results of the edge positions of the steel plates 15-1 to 15-n thus detected to the control unit 8, respectively.

  After executing Step S101 described above, the laminated core manufacturing apparatus 1 corrects the edge positions of the plurality of laminated core materials based on the detection results of the edge positions in Step S101 (Step S102). In step S <b> 102, the edge position correcting units 4-1 to 4 -n are each of a plurality of edge positions (edge positions of the steel plates 15-1 to 15-n) detected in step S <b> 101 and the reference edge. The edge positions of the steel plates 15-1 to 15-n are respectively corrected so as to reduce the respective deviation amounts from the portion positions.

  Specifically, in step S102, the control unit 8 acquires the detection results of the edge positions of the steel plates 15-1 to 15-n from the edge position detection units 5-1 to 5-n. Next, the controller 8 shifts each of the edge positions of the steel plates 15-1 to 15-n and the preset reference edge position, that is, each edge of the steel plates 15-1 to 15-n. The part position deviation amount ΔWa is calculated. Here, the reference edge position is the reference edge common to each of the steel plates 15-1 to 15-n, as exemplified by the reference edge positions SPa and SPb on both sides in the width direction D1 shown in FIG. Position. The controller 8 adjusts the edge position correction units 4-1 to 4-1 so as to reduce each edge position deviation amount ΔWa and desirably eliminate each edge position deviation amount ΔWa (set to zero). Each of 4-n is instructed and controlled to correct the edge position.

  The edge position correction units 4-1 to 4-n correct the edge positions of the steel plates 15-1 to 15-n to a common reference edge position based on the control of the control unit 8 described above, and these steel plates. Each edge position shift amount ΔWa of 15-1 to 15-n is reduced (preferably to zero value). For example, the edge position correcting unit 4-1 tilts the roll shaft 4 a from the horizontal direction as shown in FIG. 3 based on the control of the control unit 8, thereby causing the steel plate 15-1 to tilt downward from the roll shaft 4 a. Sliding displacement in the direction. As a result, as shown in FIG. 2, the edge position correcting unit 4-1 corrects the edge positions Pa and Pb of the steel plate 15-1 by the edge position deviation amount ΔWa in the width direction D <b> 1. The edge position deviation amount ΔWa of the steel sheet 15-1 is reduced, and the edge positions Pa and Pb of the steel sheet 15-1 are matched with the reference edge positions SPa and SPb, respectively. The edge position correcting sections 4-1 to 4-n thus correct the edge positions of the steel sheets 15-1 to 15-n to the common reference edge positions, respectively, thereby making the steel sheets 15-1 to 15- Align the edge position between each of n.

  Moreover, in step S102, the control part 8 is based on the edge position of the width direction both sides of the steel plates 15-1 to 15-n acquired from the edge position detection parts 5-1 to 5-n. The center positions in the width direction of 1 to 15-n are calculated. The control unit 8 controls the edge position correcting operation by the edge position correcting units 4-1 to 4-n so that the obtained center positions in the width direction coincide with the preset reference center position CP. To do. The edge position correcting units 4-1 to 4 -n are based on the control of the control unit 8 as described above, along with the correction of the edge positions described above, the center positions in the width direction of the steel plates 15-1 to 15 -n (for example, The center position in the width direction D1 of the steel plate 15-1 shown in FIG. 2 is corrected to the common reference center position CP. Thereby, the edge position correction | amendment parts 4-1 to 4-n make these each width direction center position and common reference | standard center position CP correspond. Thereafter, the edge position correcting units 4-1 to 4-n send these steel plates 15-1 to 15-n to the edge position detecting units 5-1 to 5-n, respectively.

  After executing step S102 described above, the laminated core manufacturing apparatus 1 superimposes a plurality of laminated core materials whose edge positions are corrected in step S102 (step S103). In step S103, the steel plates 15-1 to 15-n whose edge positions and the like are appropriately corrected as described above are respectively changed from the edge position correcting sections 4-1 to 4-n to the edge position detecting section 5-1. Through ˜5-n, the entrance side of the pinch roll 6 is sequentially reached. The pinch roll 6 sequentially receives these steel plates 15-1 to 15-n as laminated core materials, and sandwiches and superimposes the received steel plates 15-1 to 15-n in the thickness direction. Thereby, the pinch roll 6 obtains the superposition body 18 of a plurality (n pieces) of laminated core materials. The pinch roll 6 sequentially feeds the stacked body 18 formed in this way toward the press machine 7.

  After executing Step S103 described above, the laminated core manufacturing apparatus 1 punches a plurality of laminated core materials stacked in Step S103, and obtains a punched body of the plurality of laminated core materials (Step S104).

  In step S104, the press machine 7 moves the stacked body 18 of the steel plates 15-1 to 15-n as the laminated core materials from the above-described pinch roll 6 between the upper mold 7a and the lower mold 7b. Accept sequentially. Next, the press machine 7 sandwiches and holds the received superposed body 18 between the upper mold 7a and the lower mold 7b. Subsequently, the press machine 7 simultaneously punches the constrained overlapping body 18 in the thickness direction by the upper mold 7a and the lower mold 7b. Thereby, the press machine 7 obtains a punched body of a plurality of laminated core materials (specifically, steel plates 15-1 to 15-n) having a target iron core shape from the stacked body 18. The press machine 7 continuously performs the above-described punching process on the received stacked body 18 every time the stacked body 18 is received between the upper mold 7a and the lower mold 7b. As a result, the press machine 7 obtains a plurality of punched bodies having a target iron core shape.

  After executing step S104 described above, the laminated core manufacturing apparatus 1 stacks and integrates the plurality of punched bodies obtained in step S104 to manufacture a desired laminated core (step S105), and ends this process. In step S105, the press machine 7 uses the upper die 7a and the lower die 7b, and the rolling directions of the steel plates 15-1 to 15-n that are the raw materials of the plurality of punched bodies obtained in step S104 described above are the same. Lamination is performed so that they are aligned in the same direction, and a plurality of laminated punched bodies are integrated by caulking or the like. As a result, the press machine 7 manufactures a laminated iron core having a target shape.

  In this step S105, the core-shaped punched bodies are integrated with each other by caulking with the press machine 7 using its own mold (that is, a mold comprising an upper mold 7a and a lower mold 7b, the same applies hereinafter). You may implement | achieve by forming a dowel in a punching body and pressing this dowel with a predetermined | prescribed apparatus and caulking between punching bodies. Further, the core-shaped punched bodies are integrated with each other by welding the punched bodies outside the die of the press machine 7 or by fixing means such as bolts or adhesives. This may be realized.

  In the method for manufacturing a laminated core according to the first embodiment of the present invention, each process of steps S101 to S105 described above is repeated each time a laminated core is produced using the steel sheets 15-1 to 15-n that are laminated core materials. Executed.

  As described above, in the first embodiment of the present invention, a plurality of edge position detection units are installed immediately before the entry side of the overlapping unit that overlaps a plurality of laminated core materials, and each along a different conveyance path. The edge positions in the width direction of each laminated core material of the plurality of laminated core materials that have been conveyed and arrived immediately before entering the overlapping portion are detected by the plurality of edge position detectors, respectively. By the plurality of edge position correcting sections so as to reduce the amount of each edge position deviation between each of the plurality of edge positions detected by the edge position detecting section and the reference edge position common to each laminated core material. The edge positions of the plurality of laminated core materials are respectively corrected, and the plurality of laminated core materials whose edge positions are corrected in this way are overlapped in the thickness direction by the overlapping portion described above, and overlapped. Laminated core material Punched simultaneously by punching unit, acquires the punching of the plurality of laminated core materials, and integrated stacking a plurality of acquired punched body manufactures laminated core.

  For this reason, each edge position shift amount in the plurality of laminated core materials immediately before being overlapped in the thickness direction by the overlapping portion is reduced as much as possible, and the edge positions of the plurality of laminated core materials are changed to the respective laminated core materials. It is possible to align the reference edge position common to the iron core material. As a result, the edge positions of the laminated core materials are aligned with each other, and these laminated core materials can be stacked in the thickness direction, even if the thickness of each laminated core material is its own width. Even if it is inclined in the direction, it is possible to maintain a state in which the edge positions of the plurality of laminated core materials are aligned regardless of the deviation along the width direction of the thickness of each laminated core material. As a result, it is possible to suppress the deviation in the width direction as much as possible in the plurality of laminated core materials laminated to produce the laminated core, and in this way the edge position is aligned by suppressing the deviation in the width direction. A stacked body of a plurality of laminated core materials can be stably provided for a punching process for producing a laminated core.

  According to the present invention, a plurality of laminated core material stacks are sequentially fed into a die of a punching section (press machine) while maintaining a state in which the edge positions are aligned between the laminated core materials. can do. As a result, troubles caused by misalignment in the width direction of the laminated core material, such as contact between the mold and the stacked body, can be prevented, and the desired core can be stably punched continuously. Can be manufactured automatically. In addition, when simultaneously punching a stacked body of a plurality of laminated core materials, it is possible to suppress an edge shift between the stacked core materials constituting the stacked body, thereby enabling a difference between the stacked core materials. Since it is possible to prevent a punching trouble caused by the deviation of the edge portion, it is possible to improve the manufacturing efficiency of the laminated core. Furthermore, a laminated iron core using a thinner laminated core material (such as a thin magnetic steel sheet) can be produced with high production efficiency, and as a result, an excellent laminated core with low energy loss is provided. be able to.

  In Embodiment 1 of the present invention, the plurality of edge position correction units are installed immediately before the plurality of edge position detection units, respectively. For this reason, the conveyance path | route until each of the some laminated | multilayer iron core material by which each edge position correction | amendment was each corrected by the some edge position correction part passes through an edge part position detection part to a superposition | stacking part is shortened to required minimum. can do. Thereby, the shift | offset | difference resulting from the conveyance of the edge which arises in each of several laminated core material from each of several edge part position correction | amendment parts to an overlapping part can be suppressed as much as possible. As a result, the edge position in each laminated core material of a plurality of laminated core materials can be easily aligned with the common reference edge position.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In the first embodiment described above, the plurality of edge position correcting units 4-1 to 4-n are respectively installed immediately before the plurality of edge position detecting units 5-1 to 5-n. 2, the laminated core material is sent out along the transport path between each of the plurality of edge position correction units 4-1 to 4 -n and the plurality of edge position detection units 5-1 to 5 -n. Each feed roll is installed.

  FIG. 6 is a diagram illustrating a configuration example of the laminated core manufacturing apparatus according to the second embodiment of the present invention. As illustrated in FIG. 6, the laminated core manufacturing apparatus 21 according to the second embodiment includes a plurality of edge position correction units 4-1 to 4 -n and a plurality of edge position detection units 5-1 to 5 -n. Are provided with a plurality of feed rolls 24-1 to 24-n that respectively feed the steel plates 15-1 to 15-n as the laminated core material along the respective transport paths. Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same components.

  The feed rolls 24-1 to 24-n are facilities for feeding a plurality of steel plates 15 from the upstream side to the downstream side of the transport path. Specifically, as shown in FIG. 6, the feed rolls 24-1 to 24-n include a plurality of edge position correction units 4-1 to 4-n and a plurality of edge position detection units 5-1 to 5. -N, respectively. At this time, one or more feeding rolls 24-1 to 24-n are installed for each transport path of the steel plates 15-1 to 15-n (one in the second embodiment). That is, in the second embodiment, the edge position correcting units 4-1 to 4-n are respectively installed in the front stage of these feed rolls 24-1 to 24-n. These feed rolls 24-1 to 24-n are used to convert the steel plate 15-1 to 15-n sent from the edge position correcting units 4-1 to 4-n to the edge position detecting units 5-1 to 5-1, respectively. Sent sequentially to 5-n for each transport route.

  On the other hand, the laminated core manufacturing method according to the second embodiment is performed using the laminated core manufacturing apparatus 21 shown in FIG. That is, in the laminated core manufacturing method according to the second embodiment, the feed rolls 24-1 to 24-n send the steel plates 15-1 to 15-n to the edge position detection units 5-1 to 5-n, respectively. Except for this, the second embodiment is the same as the first embodiment.

  As described above, in the second embodiment of the present invention, one or more feed rolls that respectively feed a plurality of laminated core materials to a plurality of edge position detection units are installed for each conveyance path of the laminated core materials. Thus, a plurality of edge position correcting portions are respectively installed in the preceding stage of the plurality of feed rolls, and the others are configured in the same manner as in the first embodiment. For this reason, while exhibiting the effect similar to Embodiment 1 mentioned above, a some laminated | multilayer iron core material is each stably conveyed toward the some edge position detection part side from the some edge position correction part side. be able to.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. In the first embodiment described above, the edge positions of the steel plates 15-1 to 15-n are each corrected by the tilting of the rotating roll bodies of the edge position correcting parts 4-1 to 4-n. In the third embodiment, the edge positions of the steel plates 15-1 to 15-n are corrected by the movement in the width direction of each payoff reel that pays out the steel plates 15-1 to 15-n.

  FIG. 7 is a diagram illustrating a configuration example of the laminated core manufacturing apparatus according to the third embodiment of the present invention. As shown in FIG. 7, the laminated core manufacturing apparatus 31 according to the third embodiment is a laminated core material in place of the plurality of payout units 2-1 to 2-n of the laminated core manufacturing apparatus 1 according to the first embodiment. Provided with a plurality of payout portions 32-1 to 32-n having a function of correcting the edge position, and a plurality of feed rollers 34-1 to 34-instead of the plurality of edge position correction portions 4-1 to 4 -n. n, and a control unit 38 is provided instead of the control unit 8. Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same components.

  The payout units 32-1 to 32-n are each configured using a payoff reel or the like, and are installed at the entrance end of the laminated core manufacturing apparatus 31 as shown in FIG. In the third embodiment, the payout portions 32-1 to 32-n are a payout function for paying out the steel plates 15-1 to 15-n as the laminated core materials, respectively, and the edge portions of the steel plates 15-1 to 15-n. It also has a correction function to correct each position. Specifically, each of the payout units 32-1 to 32-n moves its payoff reel in the width direction of the laminated core material to be paid out based on the control of the control unit 38. Thus, the payout portions 32-1 to 32-n correct the edge positions of the steel plates 15-1 to 15-n as needed while paying out the steel plates 15-1 to 15-n, respectively. The payout function of the steel plates 15-1 to 15-n by the payout units 32-1 to 32-n is the same as that of the payout units 2-1 to 2-n in the first embodiment described above.

  The feed rolls 34-1 to 34-n are facilities for feeding a plurality of steel plates 15 from the upstream side to the downstream side of the transport path. Specifically, as illustrated in FIG. 7, the feed rolls 34-1 to 34-n are installed in front of the edge position detection units 5-1 to 5-n, respectively. The feed rolls 34-1 to 34-n are further connected to the steel plate 15-1 to 15-n fed from the previous feed rolls 3-1 to 3-n, respectively, by edge position detection units 5-1 to 5-n. Sent sequentially to n for each transport path.

  The control unit 38 controls the edge position correcting operation of the above-described payout units 32-1 to 32-n. In this Embodiment 3, the control part 38 makes control object (edge position correction part 4-1 to 4-n) of the control part 8 in Embodiment 1 mentioned above to the payout parts 32-1 to 32-n. It is a replacement. That is, the control unit 38 reduces the amount of deviation between each of the plurality of edge positions acquired from the edge position detection units 5-1 to 5-n and the above-described reference edge position (preferably to zero value). As described above, the correction of the edge positions of the steel plates 15-1 to 15-n by the payout portions 32-1 to 32-n is controlled.

  Next, the correction of the edge position of the laminated core material in the third embodiment will be specifically described. FIG. 8 is a diagram for explaining the correction of the edge position of the laminated core material by the payout portion according to the third embodiment of the present invention. Hereinafter, the payout part 32-1 will be exemplified as a representative of the payout parts 32-1 to 32-n, and the correction of the edge position of the laminated core material by the payout part 32-1 will be described with reference to FIG. . In addition, the correction function of the edge position of the laminated core material by the rest (for example, the payout unit 32-n) of the payout units 32-1 to 32-n other than the payout unit 32-1 is payout except that the correction target is different. It is the same as the part 32-1.

  The payout unit 32-1 shown in FIG. 8 has a payoff reel that receives the coiled steel plate 15-1 and pays out the received steel plate 15-1 into its transport path. The payout portion 32-1 sequentially pays out the steel plate 15-1 in the longitudinal direction D2 (feeding direction) by the rotating action of the payoff reel, and the edges 16a and 16b in the width direction D1 of the steel plate 15-1. The positions, that is, the edge positions Pa and Pb are corrected.

  In detail, as shown in FIG. 8, the paying-out part 32-1 moves its payoff reel along the width direction D1 of the steel plate 15-1, and thereby the edge positions Pa, Pb is corrected to the reference edge positions SPa and SPb. At this time, the moving direction and moving amount of the payoff reel of the payout unit 32-1 are controlled by the control unit 38 shown in FIG. The payout unit 32-1 displaces the payout position of the steel plate 15-1 in the width direction D1 by the edge position shift amount ΔWa by such movement of the payoff reel along the width direction D1.

  Here, the edge position deviation amount ΔWa is a reference common to each of the edge positions of the steel plates 15-1 to 15-n and the steel plates 15-1 to 15-n, as in the case of the first embodiment. Each deviation amount from the edge position (for example, a deviation amount between the edge position Pa of the steel plate 15-1 and the reference edge position SPa shown in FIG. 8). The payout portion 32-1 shifts one edge position Pa in the steel plate 15-1 to one reference edge position SPa by the displacement in the width direction D <b> 1 of the steel plate 15-1 by the edge position deviation amount ΔWa. Correct it. As a result, the other edge position Pb of the steel plate 15-1 is corrected to the other reference edge position SPb, and the center position in the width direction D1 of the steel plate 15-1 is corrected to the reference center position CP. .

  On the other hand, the laminated core manufacturing method according to the third embodiment is performed using the laminated core manufacturing apparatus 31 shown in FIG. That is, in the laminated core manufacturing method according to the third embodiment, in step S102 illustrated in FIG. 5, the control unit 38 has a plurality of edge positions acquired from the edge position detection units 5-1 to 5-n. Correction of the edge position with respect to each of the payout parts 32-1 to 32-n so as to reduce (desirably to zero value) each edge position deviation amount ΔWa between each and the reference edge position described above. Direct and control operation. The payout units 32-1 to 32-n move their payoff reels in the width direction D1 by the edge position shift amount ΔWa based on the control of the control unit 38, thereby the steel plate 15-1. The edge position of .about.15-n is corrected to the common reference edge position, and the edge position shift amount .DELTA.Wa of each of the steel plates 15-1 to 15-n is reduced (desirably to zero value). The laminated core manufacturing method according to the third embodiment is the same as that of the first embodiment described above, except for the correction operation and control of the edge positions of the steel plates 15-1 to 15-n.

  As described above, in the third embodiment of the present invention, instead of performing correction of the edge position of the plurality of laminated core materials at the position immediately before the plurality of edge position detection units, a plurality of positions positioned at the entry end are provided. The edge portions of the plurality of laminated iron core materials are each corrected by the payout portion, and the others are configured in the same manner as in the first embodiment. For this reason, while exhibiting the effect similar to Embodiment 1 mentioned above, the conveyance path | route of each lamination | stacking iron core material from paying out several laminated iron core materials to superimposing can be comprised simply.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. In the above-described embodiment, the edge positions of the steel plates 15-1 to 15-n are respectively corrected by the tilting of the rotating roll bodies of the edge position correcting sections 4-1 to 4-n. 4, the edge positions of the steel plates 15-1 to 15-n are corrected by pressing the respective edge portions of the steel plates 15-1 to 15n from the width direction.

  FIG. 9 is a diagram illustrating a configuration example of a laminated core manufacturing apparatus according to the fourth embodiment of the present invention. As shown in FIG. 9, the laminated core manufacturing apparatus 41 according to the fourth embodiment is replaced with a plurality of edge position correcting units 4-1 to 4 -n of the laminated core manufacturing apparatus 1 according to the first embodiment. A plurality of edge position correction units 44-1 to 44-n are provided, and a control unit 48 is provided instead of the control unit 8. Moreover, the laminated iron core manufacturing apparatus 41 further includes a plurality of feed rolls 43-1 to 43-n in the preceding stage of the plurality of edge position correction units 4-1 to 4-n. Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same components.

  The feed rolls 43-1 to 43-n are facilities for feeding a plurality of steel plates 15 from the upstream side to the downstream side of the transport path. Specifically, as illustrated in FIG. 9, the feed rolls 43-1 to 43-n are installed in front of the edge position correcting units 44-1 to 44-n, respectively. The feed rolls 43-1 to 43-n are steel plate 15-1 to 15-n fed from the preceding feed rolls 3-1 to 3-n, respectively, and edge position correcting sections 44-1 to 44-. Sent sequentially to n for each transport path.

  The edge position correction units 44-1 to 44-n each correct the edge position in the width direction of each laminated core material of the plurality of laminated core materials by a method different from that of the first embodiment. Specifically, the edge position correcting units 44-1 to 44-n are guide mechanisms that guide the edge in the width direction of the laminated core material sequentially conveyed along the conveyance path to a common reference edge position. As shown in FIG. 9, each is provided immediately before the edge position detection units 5-1 to 5-n. For example, the edge position correction unit 44-1 is installed at a position subsequent to the feed roll 43-1 and immediately before the edge position detection unit 5-1, in the conveyance path of the steel plate 15-1. The edge position correcting unit 44-n is installed at a position subsequent to the feed roll 43-n and immediately before the edge position detecting unit 5-n in the conveyance path of the steel plate 15-n. The edge position correcting units 44-1 to 44-n push the edges of the steel plates 15-1 to 15-n in the width direction by their own guide mechanisms based on the control of the control unit 48, whereby the steel plate 15 The edge positions of −1 to 15-n are corrected as necessary.

  The controller 48 controls the edge position correcting operation of the edge position correcting sections 44-1 to 44-n described above. In the fourth embodiment, the control unit 48 converts the control target (edge position correcting units 4-1 to 4-n) of the control unit 8 in the above-described first embodiment to the edge position correcting units 44-1 to 44-44. -N is replaced. That is, the control unit 48 reduces each deviation amount between each of the plurality of edge positions acquired from the edge position detection units 5-1 to 5-n and the above-described reference edge position (preferably to zero value). As described above, the correction of the edge positions of the steel plates 15-1 to 15-n by the edge position correction sections 44-1 to 44-n is controlled.

  Next, the correction of the edge position of the laminated core material in the fourth embodiment will be specifically described. FIG. 10 is a diagram for explaining the correction of the edge position of the laminated core material by the edge position correction unit according to the fourth embodiment of the present invention. Below, the edge position correction part 44-1 is illustrated on behalf of the edge position correction parts 44-1 to 44-n, and the laminated core material by the edge position correction part 44-1 is illustrated with reference to FIG. The correction of the edge position will be described. In addition, the correction function of the edge position of the laminated core material by the remainder (for example, the edge position correction part 44-n) except the edge position correction part 44-1 of the edge position correction parts 44-1 to 44-n, and The configuration of the guide mechanism is the same as that of the edge position correcting unit 44-1, except that the correction target is different.

  As shown in FIG. 10, the edge position correcting portion 44-1 includes a pair of guide portions 45a and 45b facing the width direction D1 of the steel plate 15-1, and the guide portions 45a and 45b along the width direction D1. Drive units 46a and 46b that are respectively moved. In the edge position correction unit 44-1, the guide mechanism guides the edge parts 16a and 16b in the width direction D1 of the steel plates 15-1 sequentially conveyed to the common reference edge positions SPa and SPb, respectively. It is comprised by guide part 45a, 45b and drive part 46a, 46b. The edge position correcting section 44-1 does not hinder the conveyance of the steel sheet 15-1 by the action of such a guide mechanism, and thus the positions of the edges 16 a and 16 b in the width direction D <b> 1 in the steel sheet 15-1 The positions Pa and Pb are corrected.

  Specifically, as shown in FIG. 10, the edge position correcting unit 44-1 moves the guide units 45a and 45b in the width direction D1 by the power of the driving units 46a and 46b, and thereby the steel plate 15- 1 edge positions Pa and Pb are corrected to reference edge positions SPa and SPb, respectively. At this time, the moving direction and the moving amount of the guide portions 45a and 45b are controlled through the control of the driving portions 46a and 46b by the control portion 48 shown in FIG. The edge position correcting unit 44-1 pushes the steel plate 15-1 from the width direction D 1 by at least one of the guide portions 45 a and 45 b moving along the width direction D 1 in this way. The edge position shift amount ΔWa is displaced in the width direction D1.

  Here, the edge position deviation amount ΔWa is a reference common to each of the edge positions of the steel plates 15-1 to 15-n and the steel plates 15-1 to 15-n, as in the case of the first embodiment. Each deviation amount from the edge position (for example, a deviation amount between the edge position Pa of the steel plate 15-1 and the reference edge position SPa shown in FIG. 10). The edge position correcting unit 44-1 changes one edge position Pa in the steel sheet 15-1 to one reference edge by the displacement in the width direction D <b> 1 of the steel sheet 15-1 by such an edge position deviation amount ΔWa. Correct to position SPa. As a result, the other edge position Pb of the steel plate 15-1 is corrected to the other reference edge position SPb, and the center position in the width direction D1 of the steel plate 15-1 is corrected to the reference center position CP. .

  On the other hand, the laminated core manufacturing method according to the fourth embodiment is performed using the laminated core manufacturing apparatus 41 shown in FIG. That is, in the laminated core manufacturing method according to the fourth embodiment, in step S102 illustrated in FIG. 5, the control unit 48 sets the plurality of edge positions acquired from the edge position detection units 5-1 to 5-n. For each of the edge position correcting sections 44-1 to 44-n, the edge position deviation amount ΔWa between each and the above-described reference edge position is reduced (preferably set to zero). Directs and controls position correction operations. The edge position correction units 44-1 to 44-n operate their guide mechanisms in the width direction D1 by the edge position deviation amount ΔWa based on the control of the control unit 48, thereby the steel plate The edge positions of 15-1 to 15-n are corrected to a common reference edge position, and the edge position displacement amount ΔWa of these steel plates 15-1 to 15-n is reduced (preferably to zero value). . The laminated core manufacturing method according to the fourth embodiment is the same as that of the first embodiment described above, except for the correction operation and control of the edge positions of the steel plates 15-1 to 15-n.

  As described above, in the fourth embodiment of the present invention, instead of correcting the edge position of the laminated core material by tilting the rotating roll body, the edge of the laminated core material is pushed from the width direction by the guide mechanism. Thus, the edge positions of the plurality of laminated core materials are respectively corrected, and the others are configured in the same manner as in the first embodiment. For this reason, while exhibiting the effect similar to Embodiment 1 mentioned above, the edge part position of each laminated iron core material can be corrected easily.

Example 1
Next, Example 1 of the present invention will be described. Example 1 examines the position suitable for detecting the edge part position of several laminated iron core material. In Example 1, using the laminated core manufacturing apparatus 1 (see FIG. 1) according to the first embodiment of the present invention, a punching test in which a plurality of laminated core materials are stacked and simultaneously punched is performed as Example 1 of the present invention. .

  As a condition of Invention Example 1, the number of laminated core materials to be overlapped was two. In other words, the payout units 2-1 and 2-2 of the laminated core manufacturing apparatus 1 are provided with steel plates 15-1 and 15-2 as laminated core materials, respectively. Both of these steel plates 15-1 and 15-2 were non-oriented electrical steel plates having a thickness of 0.20 [mm] wound in a coil shape.

  In Example 1 of the present invention, the laminated core manufacturing apparatus 1 superimposes the steel plate 15-1 delivered from the delivery unit 2-1 and the steel plate 15-2 delivered from the delivery unit 2-2 in the thickness direction by the pinch roll 6. However, the superposed body 18 of these steel plates 15-1 and 15-2 was sequentially supplied into the press machine 7. At this time, the laminated core manufacturing apparatus 1 detects the edge positions of the steel plates 15-1 and 15-2 by the edge position detection units 5-1 and 5-2 immediately before the pinch roll 6, and detects the edge position. The edge positions of the steel plates 15-1 and 15-2 were respectively corrected by the edge position correcting parts 4-1 and 4-2 immediately before the parts 5-1 and 5-2. Further, the press machine 7 removes an iron core-shaped punched body from the superposed body 18 sequentially supplied between the upper mold 7a and the lower mold 7b at a pace of 100 [spm (stroke / min)]. Punched continuously for the stroke. In Example 1, the punching test by the laminated core manufacturing apparatus 1 according to Example 1 of the present invention is performed at the edge position of the stacked body 18 inserted between the upper mold 7a and the lower mold 7b of the press machine 7, that is, This was started when the edge positions of the two stacked steel plates 15-1 and 15-2 were aligned.

  On the other hand, in Example 1, as a comparative example 1 and 2 to be compared with the above-described inventive example 1, a comparative laminated core manufacturing apparatus in which each condition for detecting and correcting the edge position was changed was prepared. FIG. 11 is a diagram illustrating a configuration example of the laminated core manufacturing apparatus according to the first comparative example. The laminated core manufacturing apparatus of Comparative Example 1 includes edge position detection units 5-1 and 5-2 in the laminated core manufacturing apparatus 1 of Example 1 of the present invention, as exemplified by the laminated core manufacturing apparatus 101 shown in FIG. In the configuration, the installation is replaced immediately before the pinch roll 6 and immediately after the payout units 2-1, 2-2. About the others, the laminated core manufacturing apparatus of the comparative example 1 is comprised similarly to the laminated core manufacturing apparatus 1 of the example 1 of this invention. Moreover, although the laminated core manufacturing apparatus of Comparative Example 2 is not particularly illustrated, the edge position correcting units 4-1, 4-2 and the edge position detecting units 5-1, 5-1 from the laminated core manufacturing apparatus 1 of Example 1 of the present invention. It is the structure which removed 5-2. About the others, the laminated core manufacturing apparatus of the comparative example 2 is comprised similarly to the laminated core manufacturing apparatus 1 of the example 1 of this invention.

  In each of Comparative Examples 1 and 2 described above, the above-described comparative laminated core manufacturing apparatus has an iron core from the superposed body 18 of the steel plates 15-1 and 15-2 under the same punching conditions as in Example 1 of the present invention. The shape punched body was punched continuously for 200 strokes. Also in Comparative Examples 1 and 2, the punching test by the comparative laminated iron core manufacturing apparatus was performed between the upper die 7a and the lower die 7b of the press machine 7 in the same manner as in Example 1 of the present invention. It started when the edge positions of the two superposed steel plates 15-1 and 15-2) were aligned.

  In Example 1, after each punching test of Invention Example 1 and Comparative Examples 1 and 2, the superposed body 18 remaining in the upper mold 7a or the lower mold 7b of the press machine 7, that is, the overlay after the punching process. About the body 18, each edge part position of the overlapping steel plates 15-1 and 15-2 was measured. Thereby, the amount of deviation of the edge position between the steel plates 15-1 and 15-2 (hereinafter referred to as edge position deviation amount ΔWb) was obtained. Based on the edge position deviation amount ΔWb obtained in this way, the influence of the detection position of the edge position of the laminated core material on the deviation in the width direction of the laminated core material during punching was evaluated.

  FIG. 12 is a diagram showing the evaluation results of the edge position displacement amount of the laminated core material after each punching test of Invention Example 1 and Comparative Examples 1 and 2. As shown in FIG. 12, in Example 1 of the present invention, the edge position deviation amount ΔWb between the steel plate 15-1 and the steel plate 15-2 in the superposed body 18 after the punching test is extremely small as 0.10 [mm]. Value. From this, in the punching process of the laminated core material by the laminated core manufacturing apparatus 1 of Example 1 of the present invention, the edge positions of the steel plates 15-1 and 15-2 forming the laminated body 18 of the laminated core material are hardly shifted. I understand that.

  Compared to Example 1 of the present invention, in Comparative Examples 1 and 2, as shown in FIG. 12, the edge position deviation amount ΔWb after the same punching test is 1.75 [mm] or 1.81 [mm]. That is, it was a very large value as compared with Example 1 of the present invention. From this, in the punching process of the laminated core material by the comparative laminated core manufacturing apparatus in Comparative Examples 1 and 2, the edge positions of the steel plates 15-1 and 15-2 forming the laminated body 18 of the laminated core material are large. It can be seen that deviation occurs.

  From the comparison results of the present invention example 1 and comparative examples 1 and 2, the edge positions of the steel plates 15-1 and 15-2 necessary for the edge position correction function of the edge position correction parts 4-1 and 4-2. Is detected by the edge position detectors 5-1 and 5-2 installed immediately before the pinch roll 6, the laminated core manufacturing apparatus 1 according to the first example of the present invention is a steel plate at a position immediately before the pinch roll 6. Compared to the laminated core manufacturing apparatus of Comparative Examples 1 and 2 in which the edge positions of 15-1 and 15-2 are not detected, the edge position deviation amount ΔWb of the steel plates 15-1 and 15-2 at the time of punching It can be seen that can be further reduced. Therefore, when stacking and punching a plurality of laminated core materials, the positional deviation (ie, the width direction deviation) of each of the plurality of laminated core materials is reduced as much as possible, and preferably the width direction deviation. In order to eliminate the above, the position of the edge of each of the plurality of laminated core materials is detected at a position immediately before the plurality of laminated core materials are overlapped, and according to the obtained detection results, It is clear that the edge position needs to be corrected. That is, the position immediately before stacking a plurality of laminated core materials is a plurality of laminated cores from the viewpoint of reducing the deviation in the width direction of the plurality of laminated core materials (particularly the width direction deviation of the laminated core material at the time of punching). It was confirmed that the position was suitable for detecting the edge position of the material.

  In Example 1, for each of Invention Example 1 and Comparative Examples 1 and 2, the punching test under the above-described conditions was continued up to 6000 strokes, and the steel plates 15-1, 15-1 after the 6000th stroke punching test were performed. Each edge position of 15-2 was measured, and edge position deviation amount ΔWb between these steel plates 15-1 and 15-2 was obtained. FIG. 13 is a diagram showing a correlation between the number of punching strokes for a laminated body of laminated core materials and the amount of edge position deviation of each laminated core material after punching. FIG. 13 also shows the results of Example 2 of the present invention in Example 2 described later.

  As can be seen with reference to FIG. 13, the edge position deviation amount ΔWb of the steel plates 15-1 and 15-2 after the punching test in Example 1 of the present invention increases the number of punching strokes from 200 strokes to 6000 strokes. But it didn't change at all. On the other hand, the edge position deviation amount ΔWb of the steel plates 15-1 and 15-2 after the punching test in Comparative Examples 1 and 2 increases from 200 strokes as the number of punching strokes increases. As it increased to 6000 strokes, it increased greatly. From this, as illustrated in Example 1 of the present invention, the position of the edge of each of the plurality of laminated core materials is detected at the position immediately before the plurality of laminated core materials are overlaid, and according to the obtained detection result. Thus, if the edge positions of the plurality of laminated core materials are corrected, the laminated body 18 of the laminated core materials at the time of the punching process (a plurality of laminated core materials stacked) regardless of an increase in the number of strokes of the punching process. It was found that the deviation in the width direction can be stably reduced.

(Example 2)
Next, a second embodiment of the present invention will be described. Example 2 examines the installation position of the edge position correction | amendment parts 4-1 to 4-n which each correct the edge part position of a some laminated core material. In Example 2, using the laminated core manufacturing apparatus 21 (see FIG. 6) according to the second embodiment of the present invention, a punching test in which a plurality of laminated core materials are overlapped and simultaneously punched is performed as Example 2 of the present invention. .

  Each condition of the laminated core material and the punching test in Invention Example 2 was the same as that of Invention Example 1 described above. That is, in the present invention example 2, the laminated core manufacturing apparatus 21 is provided with the same steel plates 15-1 and 15-2 as those of the present invention example 1 to the payout portions 2-1 and 2-2, and these steel plates 15-1 15-2 are punched continuously from the superposed body 18 formed by superposing the pinch rolls 6 to 6000 strokes at a pace of 100 [spm]. In particular, in the laminated core manufacturing apparatus 21 of Example 2 of the present invention, the feed rolls 24-1, between the edge position correction units 4-1 and 4-2 and the edge position detection units 5-1 and 5-2. 24-2 are installed. That is, in this laminated iron core manufacturing apparatus 21, the steel plates 15-1 and 15-2 sent from the edge position correcting parts 4-1 and 4-2 are respectively edged by the feed rolls 24-1 and 24-2. It is sent to the position detectors 5-1 and 5-2.

  In Example 2, the edge part between the overlapping steel plates 15-1 and 15-2 after the punching tests of the 200th stroke and the 6000th stroke was performed in the same manner as in the above-described Invention Example 1 with respect to Invention Example 2. A positional deviation amount ΔWb was obtained. The result is shown in FIG. 13 described above.

  As can be seen with reference to FIG. 13, the edge position deviation amount ΔWb of the steel plates 15-1 and 15-2 after the punching test in Example 2 of the present invention has any number of punching strokes of 200 strokes to 6000 strokes. In this case, it was almost the same as the above-described Example 1 of the present invention. Therefore, edge position correction units 4-1 to 4-n that respectively correct the edge positions of the plurality of laminated core materials, and edge position detection units that detect the edge positions of the plurality of laminated core materials, respectively. Even when equipment that does not greatly change the edge position of the laminated core material being conveyed, such as feed rolls 24-1 to 24-n, is installed between each of 5-1 to 5-n, it overlaps at the time of punching It turned out that the shift | offset | difference of the width direction of a some laminated iron core material can be reduced. That is, the edge position correction units 4-1 to 4-n are not disposed immediately before the edge position detection units 5-1 to 5-n, but are disposed in front of the feed rolls 24-1 to 24-n. However, the deviation in the width direction of the plurality of laminated core materials that overlap each other during the punching process can be sufficiently reduced.

(Example 3)
Next, a third embodiment of the present invention will be described. Example 3 examines a method of correcting each of the edge positions of a plurality of laminated core materials. In Example 3, using the laminated core manufacturing apparatus 31 (see FIG. 7) according to the third embodiment of the present invention, a punching test in which a plurality of laminated core materials are stacked and simultaneously punched is performed as Example 3 of the present invention. . In addition, a punching test in which a plurality of laminated core materials are overlapped and punched at the same time using the laminated core manufacturing apparatus 41 (see FIG. 9) according to the fourth embodiment of the present invention is performed as Example 4 of the present invention.

  The laminated core material and the punching test conditions in Invention Examples 3 and 4 were the same as in Invention Example 1 described above. That is, in the present invention example 3, the laminated iron core manufacturing apparatus 31 is provided with the same steel plates 15-1 and 15-2 as those of the present invention example 1 to the payout portions 32-1 and 32-2, and these steel plates 15-1 are provided. 15-2 are punched out continuously from a superposed body 18 formed by superposing the pinch rolls 6 to 200 strokes at a pace of 100 [spm]. Moreover, in the present invention example 4, the laminated core manufacturing apparatus 41 is provided with the steel plates 15-1 and 15-2 similar to the present invention example 1 to the paying-out portions 2-1 and 2-2, and similar to the present invention example 3. Further, an iron core-shaped punched body was continuously punched from the superposed body 18 of these steel plates 15-1 and 15-2 up to 200 strokes at a pace of 100 [spm].

  In particular, in the laminated core manufacturing apparatus 31 of Example 3 of the present invention, the positions of the edge portions of the steel plates 15-1 and 15-2 by the movement in the width direction of the payout portions 32-1 and 32-2 (specifically, payoff reels). Are corrected (see FIG. 8). In the laminated core manufacturing apparatus 41 of Example 4 of the present invention, the edge positions of the steel plates 15-1 and 15-2 are respectively corrected by the action of the guide mechanisms of the edge position correcting sections 44-1 and 44-2 (FIG. 10). On the other hand, in the laminated core manufacturing apparatus 1 of Example 1 of the present invention described above, the steel plates 15-1 and 15-2 are tilted by the tilting of the edge position correcting units 4-1 and 4-2 (specifically, rotating roll bodies). Each edge position is corrected (see FIGS. 2 and 3).

  In Example 3, for each of Invention Examples 3 and 4, the edge position between the overlapping steel plates 15-1 and 15-2 after the punching test of the 200th stroke was performed in the same manner as in Invention Example 1 described above. A deviation amount ΔWb was obtained. Based on the edge position deviation amount ΔWb of the present invention examples 3 and 4 obtained in this way and the edge position deviation amount ΔWb of the present invention example 1 described above, according to the correction method of the edge position of the laminated core material. The deviation in the width direction of the laminated core material at the time of punching was evaluated.

  FIG. 14 is a diagram showing the evaluation results of the amount of edge position deviation of the laminated core material after each punching test of Examples 1, 3, and 4 of the present invention, in which the edge position correction method of the laminated core material is different from each other. As shown in FIG. 14, in the present invention examples 3 and 4, the edge position deviation amount ΔWb of the steel plates 15-1 and 15-2 after the punching test is 0.18 [mm] and 0.22 [mm, respectively. It was an extremely small value. Each of the edge position deviation amounts ΔWb of the present invention examples 3 and 4 is substantially the same as the edge position deviation amount ΔWb (= 0.10 [mm]) of the present invention example 1, but compared in detail. As a result, the value was slightly larger than Example 1 of the present invention.

  The following can be understood from the comparison results of the above-described inventive examples 3 and 4 and inventive example 1. That is, the method for correcting the edge position of the laminated core material is based on the movement in the width direction of the pay-off reel that delivers the laminated core material (Example 3 of the present invention), and the guide mechanism that pushes the edge of the laminated core material from the width direction. A plurality of laminated iron cores that are overlapped at the time of punching, both by the action (Invention Example 4) and by the tilting of a rotating roll body (feed roll, etc.) that feeds the laminated iron core material (Invention Example 1) The deviation in the width direction of the material can be sufficiently reduced. However, from the viewpoint of enhancing the effect of reducing the deviation in the width direction of the plurality of laminated core materials, the method for correcting the edge position of the laminated core material is based on the tilting of the rotating roll body as in Example 1 of the present invention. It is desirable.

  In addition, as described above, the method for correcting the edge position of the laminated core material in Example 1 of the present invention is the rotating rolls of the edge position correcting sections 4-1 to 4-n with the feeding direction of the laminated core material as the rotation center. It tilts the body. Therefore, the edge position correction units 4-1 to 4-n can be easily installed immediately before the edge position detection units 5-1 to 5-n. Thereby, the conveyance path | route of the laminated iron core material after edge part correction is made into the required minimum, and the width direction shift | offset | difference resulting from conveyance of a laminated iron core material can be suppressed. In addition, the method for correcting the edge position of the laminated core material in Example 1 of the present invention can correct the edge position of the laminated core material without applying a load such as strain to the laminated core material. Also from these things, it is desirable that the method for correcting the edge position of the laminated core material is based on the tilting of the rotating roll body as in the first example of the present invention. The above is also true for Invention Example 2 having the same edge position correction function as that of Invention Example 1.

Example 4
Next, a fourth embodiment of the present invention will be described. Example 4 examines a method for detecting each of the edge positions of a plurality of laminated core materials. In Example 4, using the laminated core manufacturing apparatus 1 (see FIG. 1) according to the first embodiment of the present invention, the detection method of the edge position of the laminated core material is changed, and the lamination is performed according to the detection method of the edge position. Perform punching test of iron core material. That is, a punching test in which the edge positions of a plurality of laminated core materials are detected by an optical method using the laminated core manufacturing apparatus 1 and then the plurality of laminated core materials are overlapped and punched at the same time is an example 5 of the present invention. As done. In addition, a punching test in which the detection method of the edge position of the laminated core material in Example 5 of the present invention is changed to a laser detection method is performed as Invention Example 6, and a punching test in which the detection method is changed to an ultrasonic detection method is performed. This is performed as Invention Example 7.

  The conditions of the laminated core material and the punching test in Invention Examples 5 to 7 were the same as in Invention Example 1 described above. That is, in each of Invention Examples 5 to 7, an iron core-shaped punched body is formed by 100 [spm from an overlap body 18 formed by superposing steel plates 15-1 and 15-2 similar to the above-described Invention Example 1. ] And continuously punched up to 6000 strokes.

  In addition, in the laminated core manufacturing apparatus 1 of Example 5 of the present invention, the edge position detectors 5-1 and 5-2 use the optical detection method based on light projection and reception of the steel plates 15-1 and 15-2. Each edge position was detected. In the laminated core manufacturing apparatus 1 of Example 6 of the present invention, the edge position detectors 5-1 and 5-2 use the laser-type detection method by projecting and receiving laser light to detect the edges of the steel plates 15-1 and 15-2. Each part position was detected. In the laminated core manufacturing apparatus 1 of Example 7 of the present invention, the edge position detection units 5-1 and 5-2 use the ultrasonic detection method based on transmission and reception of ultrasonic waves to detect the edges of the steel plates 15-1 and 15-2. Each part position was detected.

  In Example 4, with respect to each of Invention Examples 5 to 7, overlapping steel plates 15-1 after each punching test at the 200th stroke, the 1000th stroke, and the 6000th stroke were performed by the same method as that of Invention Example 1 described above. , 15-2, the edge position deviation amount ΔWb was obtained. With each edge position deviation amount ΔWb of Invention Examples 5 to 7 obtained in this way as an evaluation index, the width direction deviation of the laminated core material at the time of punching is determined according to the detection method of the edge position of the laminated core material. evaluated. The evaluation results are shown in Table 1.

  As shown in Table 1, the edge position deviation amount ΔWb of the steel plates 15-1 and 15-2 after the punching test is an optical type (invention example 5), laser type detection method of the edge position of the laminated core material. In both of (Invention Example 6) and the ultrasonic type (Invention Example 7), the values were extremely small regardless of the number of punching strokes (200 strokes, 1000 strokes, 6000 strokes). Further, as a result of comparing the edge position deviation amounts ΔWb of Examples 5 to 7 of the present invention, there was almost no difference in the edge position deviation amounts ΔWb due to differences in the detection methods of optical, laser, and ultrasonic methods. Therefore, even if any of optical type, laser type, and ultrasonic type is used as the edge position detection method of the laminated core material, the gap in the width direction of the multiple laminated core materials at the time of punching is sufficient. It was found that it can be reduced.

  In addition, referring to Table 1, if the edge position displacement amount ΔWb of each of the inventive examples 5 to 7 is compared in detail, the inventive example 6 adopting the laser type detecting method is the optical detecting method. The values were slightly smaller than those of Example 5 of the present invention employed and Example 7 of the present invention employing an ultrasonic detection method. From this point of view, it is desirable that the detection method of the edge position of the laminated core material is a laser method from the viewpoint of reducing as much as possible the deviation in the width direction of the plurality of laminated core materials overlapping at the time of punching.

(Example 5)
Next, a fifth embodiment of the present invention will be described. Example 5 examines the number of laminated core materials to be laminated in the thickness direction in order to produce a laminated core (number of superimposed sheets). In Example 5, using the laminated core manufacturing apparatus 1 (see FIG. 1) according to the first embodiment of the present invention, the number of laminated core materials stacked and punched at the same time is changed, and lamination is performed for each number of laminated sheets. Perform punching test of iron core material.

  As the conditions of Example 5, the number of laminated core materials was set to four types of two, three, four, and five. Steel sheets 15-1 to 15-n (integer n is the same as the number of superposed sheets) that are laminated iron core materials were non-oriented electrical steel sheets similar to those of Example 1 described above. Moreover, in Example 5, the laminated core manufacturing apparatus 1 detects the edge position by the edge position detection units 5-1 to 5-n and the edge portion of each of the n steel plates 15-1 to 15-n. The edge position is corrected by the position correcting portions 4-1 to 4 -n, and thereafter, the n steel plates 15-1 to 15 -n are pressed by the pinch roll 6, and then pressed. With the machine 7, iron core-shaped punched bodies were continuously punched.

  In Example 5, an iron core-shaped punched body (hereinafter referred to as a punched body sample # 1) punched from the stacked body 18 of the two steel plates 15-1 and 15-2 by the laminated core manufacturing apparatus 1 described above. An iron core-shaped punched body (hereinafter referred to as a punched body sample # 2) punched from an overlapped body 18 of three steel plates 15-1 to 15-3, and four steel plates 15-1 to 15-4 A core-shaped punched body punched from the stacked body 18 (hereinafter referred to as punched body sample # 3) and a core-shaped punched body punched from the stacked body 18 of five steel plates 15-1 to 15-5. (Hereinafter referred to as punched body sample # 4) were manufactured in a plurality of sheets.

  For each of the plurality of punched body samples # 1 to # 4 obtained as described above, 10 punched bodies are extracted as measurement samples, and the three outer diameter dimensions of these 10 measurement samples are measured. The variation in the measured outer diameter size, that is, the punching size variation ΔY [μm] was calculated. This punching dimension variation ΔY is a numerical value that serves as an evaluation index for the quality of the core shape of a punched body obtained by simultaneously stacking n laminated core materials. For example, the smaller the punching dimension variation ΔY, the better the core shape of the punched body.

  FIG. 15 is a diagram showing a correlation between the number of laminated core materials and the variation in punching dimensions. As shown in FIG. 15, the punching dimension variation ΔY is such that the number of laminated core materials, that is, the number of laminated steel plates 15-1 to 15-n (= n) is 2, 3, 4, 5 Increasing with the number of sheets. In particular, the increase in the punching dimension variation ΔY is relatively small when the number of laminated core materials is 2 to 4, but is relatively large when the number of laminated core materials is increased to 5. . From the above, from the viewpoint of improving the production efficiency of the laminated core, it is desirable that the number of the laminated core materials to be stacked is larger (for example, 5 or more), but the viewpoint of maintaining a good core shape of the punched body. From this, it can be seen that it is desirable to set the number to 2 or more and 4 or less.

  In addition, in Embodiment 1-4 mentioned above, although the edge part position of the width direction both sides in each of the steel plates 15-1 to 15-n was detected, this invention is not limited to this. In the present invention, the edge position detectors 5-1 to 5-n may detect edge positions on one side in the width direction in each of the steel plates 15-1 to 15-n. In this case, as for the steel plates 15-1 to 15-n, the detected edge positions on one side may be corrected to the reference edge positions common to the steel plates 15-1 to 15-n.

  Moreover, in Embodiment 2 mentioned above, the feed roll which each feeds the steel plates 15-1 to 15-n from the edge position correction parts 4-1 to 4-n to the edge position detection parts 5-1 to 5-n. Although 24-1 to 24-n are installed one by one for each conveyance path of the laminated core material, the present invention is not limited to this. In the present invention, a plurality (two or more) are provided between the edge position correcting units 4-1 to 4-n and the edge position detecting units 5-1 to 5-n for each conveyance path of the laminated core material. A feed roll may be installed.

  Furthermore, in Embodiment 1-4 mentioned above, although the electromagnetic steel plate was illustrated as a laminated iron core material, this invention is not limited to this. The steel plate as the laminated core material according to the present invention is not limited to an electromagnetic steel plate, but may be a steel plate other than the electromagnetic steel plate, or may be an iron alloy plate other than the steel plate.

  Further, the present invention is not limited by the above-described embodiments and examples, and the present invention includes a configuration in which the above-described constituent elements are appropriately combined. The shape and application of the laminated iron core produced in the present invention are not particularly limited. In addition, all other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the above-described embodiments and examples are included in the present invention.

1, 21, 31, 41.101 Laminated iron core manufacturing apparatus 2-1 to 2-n, 32-1 to 32-n Dispensing unit 3-1 to 3-n, 24-1 to 24-n, 34-1 34-n, 43-1 to 43-n Feed rolls 4-1 to 4-n, 44-1 to 44-n Edge position correction section 4a Roll shaft 5-1 to 5-n Edge position detection section 6 Pinch Roll 7 Press machine 7a Upper die 7b Lower die 8, 38, 48 Control unit 15 Plural steel plates 15-1 to 15-n Steel plates 16a, 16b Edge portion 18 Overlay body 45a, 45b Guide portions 46a, 46b Drive portion D1 Width direction D2 Longitudinal direction Pa, Pb Edge position SPa, SPb Reference edge position CP Reference center position

Claims (6)

In a laminated core manufacturing apparatus for producing a laminated core by laminating a plurality of laminated core material punched bodies and integrating them,
A plurality of edge position detectors that respectively detect edge positions in the width direction of each of the laminated core materials of the plurality of laminated core materials that are respectively conveyed along different conveyance paths;
A plurality of edge position correction portions that respectively correct the edge positions of the plurality of laminated core materials;
The plurality of edge positions so as to reduce the amount of deviation between each of the plurality of edge positions detected by the plurality of edge position detection units and a reference edge position common to each laminated core material. A control unit for controlling the correction of the edge position by the correction unit;
An overlapping portion that overlaps the plurality of laminated core materials whose edge positions are corrected by the plurality of edge position correcting portions;
A punching unit that is installed immediately after the overlapping part and punches the plurality of laminated core materials overlapped by the overlapping part to obtain the punched body;
With
The plurality of edge position detection units are installed immediately before the entry side of the overlapping portion, respectively detect the edge positions of the plurality of laminated core materials that have reached just before the entry side ,
The plurality of edge position correcting sections respectively correct the plurality of edge positions to the common reference edge position set in accordance with the die position of the punching section. apparatus.   2. The laminated core manufacturing apparatus according to claim 1, wherein the plurality of edge position correction units are respectively installed immediately before the plurality of edge position detection units. A plurality of feed rolls each for feeding the plurality of laminated core materials to the plurality of edge position detection units,
The plurality of feed rolls are installed at least one for each of the transport paths,
2. The laminated core manufacturing apparatus according to claim 1, wherein the plurality of edge position correction units are respectively installed in front of the plurality of feed rolls.   Each of the plurality of edge position correcting portions has a rotating roll body that sends the laminated core material to the overlapping portion side for each conveyance path, and the feeding direction of the laminated core material is the center of rotation. The laminated core manufacturing apparatus according to claim 1, wherein the position of the edge of the laminated core material is corrected by inclining a roll axis of the rotating roll body with respect to a horizontal direction.   The plurality of edge position detection units respectively detect the edge positions of the plurality of laminated core materials using at least one of an optical method, a laser method, and an ultrasonic method. Item 5. The laminated core manufacturing apparatus according to any one of Items 1 to 4. In a laminated core manufacturing method for manufacturing a laminated core by laminating and integrating a plurality of laminated core material punched bodies,
An edge position detecting step for detecting an edge position in the width direction in each laminated core material of the plurality of laminated core materials respectively conveyed along different conveyance paths;
Each of the plurality of laminated core materials is reduced so as to reduce a deviation amount between each of the plurality of edge positions detected by the edge position detecting step and a reference edge position common to each of the laminated core materials. An edge position correcting step for correcting each of the edge positions;
An overlaying step of superimposing the plurality of laminated core materials whose edge positions are corrected by the edge position correcting step;
A punching step for punching the plurality of laminated core materials superposed by the superposing step to obtain the punched body;
Including
The edge position detection step detects each of the edge positions of the plurality of laminated core materials that have arrived immediately before the entry side of the overlapped portion that overlaps the plurality of laminated core materials ,
The edge position correction step corrects each of the plurality of edge positions to the common reference edge position set in accordance with a die position of a punched portion for punching the plurality of laminated core materials,
In the punching step, the punched body is obtained by punching the plurality of laminated core materials by the punching part installed immediately after the overlapping part .

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