JP2011062732A - Device for transferring laminated core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for transferring a laminated core, with which a laminated iron core in a laminating station is manufactured at high speed by rotating it efficiently. <P>SOLUTION: An upper body 71 and a lower body 72 are formed on a lower die 7 in the laminating station 51 and the transferring device 10 is arranged. The side faces of the laminated iron core T punched in the laminating station 51 are supported with a die 11 and the under surface of the laminated iron core T in the lowest stage is supported with the pressurization receiving part 21 of a back pressure device 20. A first rotational driving device 14 is connected to the die 11 through a pulley. On the other hand, the back pressure device 20 which comprises the transfer device 10 is composed of a pressurization receiving part 21, a connecting shaft 22 and a cylinder device 23. Splines (or serrations) S are formed along the axial direction on the outer peripheral surface of the connecting shaft 22 and also, by connecting to a second rotational driving device 25, the pressurization receiving part 21 is constituted rotatably. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a transposing apparatus for a laminated core that can be produced at a higher speed when a laminated core is produced by laminating thin laminated cores.

  As is well known, the laminated core is formed by laminating laminated cores processed through a plurality of steps and caulking them together. In order to improve the magnetic efficiency, the core is preferably formed by laminating a large number of thin laminated cores rather than a single material. In particular, a core having a thickness as thin as possible is predetermined. In order to improve magnetic efficiency, it is desirable that the layers are stacked at a height. Laminating as thin a laminated core as possible increases the number of laminated cores by that amount, which hinders the production efficiency of the press. However, if the demand for laminated cores such as motor cores increased, the press machine had to be operated as fast as possible.

  Conventionally, when a laminated core is manufactured by, for example, a press machine, after one laminated iron core is processed in a plurality of processes, one laminated iron core is caulked and bonded at a final laminating station. A laminated core was formed. When a single laminated core is formed, it is stored in a mold of the press or discharged from the lamination process. Then, the next laminated core is caulked and joined. At this time, there is a variation in thickness in the material width direction of one laminated iron core, and laminating without considering this variation in thickness causes the laminated core to be inclined, resulting in a defective product. May be processed as In order to solve this problem, the laminated core has been rotated by a predetermined angle each time one or more laminated cores are laminated. This is called the transposition processing of the laminated core.

  An example of the rolling process is shown in a laminated core manufacturing apparatus 50 of Patent Document 1. According to this, the laminated iron cores are supported by the back pressure device and inserted into the lower die inner wall surface (hereinafter referred to as die). That is, as shown in FIG. 4, in the mold laminating station 51, the strip W is punched by the punch 53 attached to the upper mold 52 and the punched laminated core T is laminated previously. After being superposed on the iron core T, it is caulked. At this time, the lower surface of the lowermost laminated core T is supported by the lifting platform 55 of the back pressure device 54 and inserted into the die 56 and supported by the inner peripheral surface of the die 56. The die 56 is rotated by a predetermined angle by driving the worm 58 because the worm gear 57 formed in the lower part of the die 56 is engaged with the worm 58. When the die 56 is rotated by a predetermined angle, the laminated iron core T inserted into the die 56 is rotated together with the die 56. After the laminated iron core T is rotated by a predetermined angle, the next laminated iron core T is punched and caulked and joined. For this reason, it has been possible to prevent unevenness in the thickness of the laminated cores that have been laminated, resulting in poor quality.

Japanese Patent No. 2756899

  However, in the laminated iron core manufacturing apparatus 50 disclosed in Patent Document 1, the laminated iron core T is rotated by a predetermined angle by the rotation of the die 56, but the lower die 7, the laminated iron core T, and the lifting platform of the back pressure device 54. Since the total weight of 55 is large, it cannot be rotated at high speed, which hinders mass production of the laminated core. In recent years, when vehicle hybridization is required, the demand for laminated cores such as motor cores is increased, so that the speed of the press machine is required and mass production of laminated cores is forced.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a laminated core transposing apparatus capable of increasing the speed by increasing the rotational efficiency of laminated laminated cores in a laminating process in which a transposing process is performed. The purpose is to provide. For this purpose, the laminated core transposing apparatus according to the present invention is configured as follows. That is,
In the invention according to claim 1, in the laminating step of the laminated core in which a predetermined number of laminated cores are laminated, the laminated cores to be laminated are joined to a newly laminated laminated core by caulking and then rotated by a predetermined angle. A core rolling device, wherein a side portion of the laminated core in the lamination step of the laminated core is supported by a lower mold inner wall surface that supports an outer peripheral surface of the laminated core, and the laminated core at the lowest level The back pressure device is supported by a back pressure device that supports the bottom surface of the laminated core, and the back pressure device has a pressure receiving portion that supports the bottom surface of the lowermost laminated core, and the pressure receiving portion is moved up and down. A lower drive inner wall surface is connected to a first rotation drive device that rotates the lower mold inner wall surface, and the back pressure device includes the pressure receiving portion. Rotate along axis Is characterized in that Kutomo is connected to a second rotary drive device.

  The invention according to claim 2 relates to the invention according to claim 1, wherein the back pressure device is provided with a connecting shaft for connecting the pressure receiving portion and the vertical drive device, and the connection A long groove is formed in the shaft along the pressurizing direction of the pressure receiving portion, and a connecting member that engages with the long groove is disposed, and the connecting member is connected to the second rotation driving device. It is characterized by being.

  A third aspect of the present invention relates to the second aspect of the present invention, wherein the long groove is a spline or a serration.

  According to the configuration of the first aspect of the present invention, the laminated iron cores are supported on the side surfaces by the lower mold inner wall surface, and the lower surface of the laminated iron core at the lowest level is supported by the back pressure device. The lower mold inner wall surface is rotatably connected to the first rotary drive device, and the back pressure device is connected to at least the second rotary drive device. Therefore, since the laminated iron core is rotated by the first rotation driving device and at least the second rotation driving device after the punch mounted on the upper die is removed from the lower die, the back pressure device It is possible to positively rotate the laminated iron cores laminated by the rotation of the pressure receiving part. Therefore, the rotational speed for rotating the laminated core by a predetermined angle can be increased, and the laminated core can be manufactured at a high speed.

  According to the configuration of the second aspect, the connecting shaft disposed in the back pressure device is formed with a long groove along the pressing direction, and the connecting member is mounted in the long groove. Since the connecting member is connected to the second connecting drive layer and rotates around the connecting shaft, the connecting shaft moves up and down along the long groove and can rotate with respect to the axis.

  According to the structure of Claim 3, since a long groove is a spline or a serration, it can carry out by a simple process by using the tool which forms a spline or a serration.

It is a plane sectional view of a press using the rolling device of the present invention. It is sectional drawing which shows the transversion apparatus of this invention. It is an expanded sectional view of the principal part in FIG. It is sectional drawing which shows the manufacturing apparatus of the conventional laminated iron core.

  Next, an embodiment of a laminated core rolling device of the present invention (hereinafter simply referred to as a rolling device) will be described with reference to the drawings. FIG. 1 is a plan sectional view of a press machine incorporating a rolling device, FIG. 2 is a front sectional view showing the rolling device, and FIG. 3 is an enlarged view thereof.

  As shown in FIGS. 1 to 3, a manufacturing apparatus M for laminating a laminated core includes a press machine 1 as a processing machine, a feeding device 3 that conveys a strip W to the press machine 1, and a movable-side upper mold 6. And a mold 5 including a lower mold 7 on the fixed side. The upper die 6 is guided by the guide shaft 8 and moves up and down in a direction approaching and separating from the lower die 7. The lower mold 7 includes an upper main body 71 and a lower main body 72. In the mold 5, the transported strip material W is sequentially processed through various processes, and the sheets are caulked and stacked one by one in the final stacking station 51. In the embodiment, the strip W conveyed into the press machine 1 is punched as a single laminated core T at the laminating station of the mold 5 and is caulked to the previously laminated laminated core T. As a result, the layers are sequentially stacked. A predetermined number of laminated iron cores T are formed as a laminated core K and discharged from the mold 5.

  As shown in FIG. 2, in the laminating station 51, a punch 61 is mounted on the upper die 6, and a laminated iron core T (hereinafter referred to as a semi-laminated core) that is sequentially laminated before being formed as a laminated core K on the lower die 7. A rolling device 10 is connected to rotate HK) and drive it up and down.

  The rolling device 10 is disposed below the upper body 71 of the lower mold 7, and has a cylindrical lower mold inner wall surface (hereinafter referred to as a die) 11 that supports the side surface of the semi-stacked core HK, and the lowermost stacked core T. A pressure receiving portion 21 that supports the lower surface of the pressure receiving portion 21. As shown in FIG. 3 (a), the die 11 is embedded in the upper main body 71 of the lower mold 7, is formed in a cylindrical shape by forming the insertion hole 111 of the laminated iron core T in the center portion, and has a flange portion 112 in the head portion. The body part outer peripheral surface is formed in the large diameter part 113 and the small diameter part 114.

  The insertion hole 111 is formed to have a diameter substantially the same as the outer diameter of the laminated core T, and supports the outer peripheral surface (side surface) of the laminated core T or the semi-stacked core HK. The bearing member 12 is mounted on the outer peripheral surface of the large diameter portion 113 so as to be rotatable with respect to the lower mold, and the first pulley 13 is mounted on the small diameter portion 114. The first pulley 13 is connected via a belt 16 to a drive pulley 15 (see FIG. 2) mounted on a drive shaft 141 (see FIG. 2) of the first rotary drive device 14 (see FIG. 2). . Therefore, the die 11 rotates together with the first pulley 13. In the embodiment, the first rotary drive device 14 is configured to incorporate a servo motor, and the servo motor rotates the drive shaft 141 by a predetermined angle in synchronization with the crankshaft of the press machine 1. I will let you. The first rotary drive device 14 may be connected to a crankshaft of a press machine via a transmission mechanism without using a servo motor. In this case, an index device that can be intermittently rotated by the cam mechanism can be used.

  The pressure receiving portion 21 is configured as a part of the back pressure device 20 and is connected to the cylinder device 23 via a connecting shaft 22 inserted through the lower body 72 of the lower mold 7 as shown in FIG. ing. A spline S (or serration) in which a plurality of grooves are formed on the outer peripheral surface of the connecting shaft 22 along the axial direction is formed on the connecting shaft 22 so that the pressure receiving portion 21 can be moved up and down. A second pulley 24 that engages with the spline S is attached to the connecting shaft 22. The second pulley 24 is connected via a belt 27 to a drive pulley 26 (see FIG. 2) mounted on a drive shaft 251 (see FIG. 2) of a second rotary drive device 25 (see FIG. 2). . The second pulley 24 is disposed so as to be rotatable with respect to the lower main body 72, and is rotated by the drive of the second rotation driving device 25, thereby rotating the connecting shaft 22 and causing the pressure receiving portion 21 to be centered. Can be rotated. In the embodiment, the second rotary drive device 25 is configured to incorporate a servo motor, but may be configured to be mechanically connected to the crankshaft of the press machine 1. Good. In this case, an index device that can intermittently rotate the second rotary drive device 25 by a cam mechanism can be used as in the first rotary drive device 14.

  The lower end of the connecting shaft 22 is gripped by a grip portion 233 disposed at the tip of the rod 232 of the cylinder device 23. The grip portion 233 has a locking portion 233 a that locks the lower end portion of the connecting shaft 22, and is mounted via a thrust bearing 234 so that the connecting shaft 22 can rotate with respect to the rod 232. As shown in FIG. 3C, the cylinder device 23 has the upper surface of the cylinder body 231 attached to a cylinder holding base 73 fixed to the bolster of the press machine 1. In the embodiment, the cylinder device 23 is a laminated iron core that is laminated one by one in order to prevent the cylinder pressure from increasing each time one laminated iron core T is laminated while using a hydraulic cylinder. When crimping T, the relief valve is adjusted to keep the cylinder pressure constant, and the pressure receiving portion 21 is lowered.

  As shown in FIG. 2, a discharge cylinder 28 for the laminated core K is disposed between the upper main body 71 and the lower main body 72 in the lower mold 7, and the laminated core K is lowered to a predetermined position. If it does, it will be comprised so that the lamination | stacking core K can be discharged | emitted in the direction orthogonal to the raising / lowering direction of the lamination | stacking core K. FIG.

  Next, the operation of the transposing device 10 configured as described above will be described. As shown in FIG. 2, the strip W conveyed into the press 1 is punched as a laminated core T by a punch 61 of the upper die 6 in a laminating station 51 as a final station and is laminated before. Laminated with T caulking. When the laminated iron core T is caulked and joined by the punch 61, as shown in FIG. 3A, the lateral displacement is restricted by the insertion hole 111 of the die 11, and the caulking is joined by the pressure receiving portion 21. Will receive pressure to do. The pressure receiving portion 21 is moved downward by the hydraulic relief of the hydraulic cylinder. Although the downward movement of the pressure receiving portion 21 is performed together with the connecting shaft 22, since the spline S is formed on the connecting shaft 22, the connecting shaft 22 is moved vertically in the lower main body 72 of the lower mold 7. The second pulley 24 is restricted from moving in the vertical direction so as to be movable in the vertical direction.

  Since the upper surfaces of the semi-laminated cores HK that are laminated one by one are arranged on the same plane as the upper surface of the upper body 71, the laminated semi-laminated cores HK gradually move downward. Since the outer peripheral surface (side surface) of the semi-laminated core HK in which one laminated iron core T is laminated is supported by the insertion hole 111 of the die 11, the first rotation drive device 14 receives a first rotation command. Is rotated by a predetermined angle by the rotation of the die 11 connected to the rotary driving device 14. At the same time, the connecting shaft 22 is rotated by a predetermined angle via the second pulley 24 in response to a rotation command from the second rotation driving device 25. The rotation of the connecting shaft 22 rotates the pressure receiving portion 21 and follows the rotation of the semi-stacked core HK.

  That is, the rotation speed of the semi-stacked core HK can be improved by rotation from the side surface by the first rotation driving device 14 and rotation from the lower surface by the second rotation driving device 25. In particular, what was conventionally driven only from the side surface can be positively rotated by applying rotational drive from the bottom surface, and the transposition can be performed at a high speed.

  The fact that the semi-stacked core HK can be rotated quickly at the stacking station 51 can speed up the operation of the entire press.

  It should be noted that the laminated core rolling device of the present invention is not limited to the above-described embodiment. For example, if the second pulley 24 is formed so that it can be raised and lowered with respect to the connecting shaft 22, the grooves formed in the connecting shaft 22 are splines and serrations formed in large numbers along the axial direction on the outer peripheral surface. Alternatively, it may be coupled to the outer peripheral surface of the connecting shaft 22 by a key member loosely fitted in a long groove formed along the axial direction.

  Further, there may be a plurality of devices that rotate the back pressure device 20, and the back pressure device 20 may be installed in addition to the second rotation drive device 25 as well as the second rotation drive device 25.

DESCRIPTION OF SYMBOLS 1, Press machine 5, Die 51, Lamination station 6, Upper die 7, Lower die 10, Rolling device 11, Die 13, First pulley 14, First rotation drive device 20, Back pressure device 21, Addition Pressure receiving portion 22, connecting shaft 23, cylinder device 24, second pulley 25, second rotary drive device W, strip T, laminated iron core K, laminated core

Claims (3)

In a laminating process of a laminated core in which a predetermined number of laminated cores are laminated, the laminated core is a transposing apparatus for a laminated core that is rotated by a predetermined angle after the laminated iron core is caulked with a newly laminated laminated core. ,
The side surface of the laminated core in the lamination step of the laminated core is supported by the lower mold inner wall surface that supports the side surface of the laminated core, and the lower surface of the laminated core at the lowest level supports the lower surface of the laminated core Supported by back pressure device,
The back pressure device includes a pressure receiving portion that supports a lower surface of the lowermost laminated iron core, and a vertical drive device that moves the pressure receiving portion up and down.
The lower mold inner wall surface is connected to a first rotation driving device that rotates the lower mold inner wall surface, and the back pressure device rotates at least a second pressure receiving portion along an axis. It is connected to the rotary drive device of the laminated core.   The back pressure device is provided with a connecting shaft for connecting the pressure receiving portion and the vertical drive device, and a long groove is formed in the connecting shaft along the pressing direction of the pressure receiving portion. The laminated core rolling device according to claim 1, wherein a connecting member that engages with the long groove is disposed, and the connecting member is connected to the second rotation driving device. The apparatus for transposing laminated cores according to claim 2, wherein the long groove is a spline or a serration.

Images