JP2011125884A - Method for rotating and laminating laminated core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for rotating and laminating a laminated core, in which rotation and lamination are applied without stopping any reciprocal movement of a slide. <P>SOLUTION: A sub slide 10 movable at the different timing from that of a slide 3 is arranged on the slide 3 of a press machine 1. A new intermediate laminated core K1 is formed by punching an iron core piece T out of a coil material W by continuous reciprocal movement of the slide 3, and at the same time, calking the punched iron core piece with the previously punched iron core piece T, and laminating the calked sets of the predetermined number. While forming the new intermediate laminated core K1, the previously laminated intermediate laminated core K2 is turned by the predetermined angle by a rotation-and-lamination driving device 20. A composite intermediate laminated core is formed by calking the new intermediate laminated core K1 pushed out by the sub slide 10 to the previous intermediate laminated core K2 which is turned by the predetermined angle. The new intermediate laminated cores K1 of the predetermined number are rotated and laminated to form one complete laminated core K. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for rolling a laminated core that can be produced at a higher speed when a laminated core is produced by rolling a thin plate-shaped core piece.

  As is well known, the laminated core is formed by laminating iron core pieces processed through a plurality of processes and caulking. In order to improve the magnetic efficiency, the core is preferably formed by laminating a large number of thin iron core pieces rather than being formed of a single material. In order to improve magnetic efficiency, it is desirable that the layers are stacked at a height. Laminating as thin iron core pieces as possible would increase the number of iron core pieces to be laminated, thereby impeding 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 punching an iron core piece from a conveyed thin plate-shaped coil material and processing one iron core piece in a plurality of processes, in a laminating station in the final process, One laminated core was formed by caulking the laminated iron core pieces. When one laminated core is formed, it is stored in the mold of the press. Then, the next laminated core is caulked. At this time, there is a variation in the thickness of the coil material in the material width direction, and stacking without considering this variation in thickness reduces the magnetic efficiency because one stacked core is inclined. It may be treated as a quality problem or a defective product. In order to solve this problem, the laminated core is formed so as to eliminate thickness variations by rotating the laminated core by a predetermined angle each time one or a plurality of laminated cores are laminated. This is called the transposition processing of the laminated core.

  An example of the rolling process is shown in the laminated core manufacturing apparatus 50 of Patent Document 1. According to this, the laminated core pieces are supported by the back pressure device and inserted into the lower mold inner wall surface (hereinafter referred to as die) of the lower mold. That is, as shown in FIG. 9, in the mold laminating station 51, the strip W is punched by the punch 53 attached to the upper mold 52, and the punched core pieces T are stacked in front. After being superposed on the iron core piece T, it is crimped. At this time, the lower surface of the lowermost iron core piece T is supported by the lifting platform 55 of the back pressure device 54, inserted into the die 56, and supported by the inner peripheral wall 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 iron core piece T inserted into the die 56 is rotated together with the die 56. After the iron core piece T is rotated by a predetermined angle, the next iron core piece T is punched and caulked. 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 core manufacturing apparatus 50 disclosed in Patent Document 1, when the core piece T is rolled, a new core piece T cannot be punched while the core piece T is rotating. It was necessary to stop the slide or rotate it at a low speed when the slide was near top dead center. Therefore, it cannot rotate at high speed, which hinders mass production of laminated cores. In recent years, when vehicle hybridization is required, the demand for laminated cores such as motor cores has increased, which has led to demand for high-speed presses and forced mass production of laminated cores.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and provides a method for rolling a laminated core capable of improving the rotational efficiency of the laminated core pieces and increasing the speed in a lamination process in which the rolling process is performed. The purpose is to do. For this purpose, the method of transposing a laminated core according to the present invention is performed as follows.

  According to the first aspect of the present invention, in a press machine comprising a main slide that reciprocates and a secondary slide that reciprocates at a different timing from the main slide, a sheet-shaped workpiece to be conveyed is punched out to obtain an iron core piece. A method of rolling a laminated core formed and rolled over the core pieces, wherein a single block is laminated in a predetermined number of times in the process of rolling the core pieces as a laminated core in a laminating station of the press machine While the laminated cores are sequentially formed and the new single block laminated core is laminated, the previously laminated single block laminated core is rotated by a predetermined angle independently and the previously laminated single block laminated After the completion of the rotation of the core, the new single block laminated core is caulked to the previously laminated single block laminated core and rolled.

  Invention of Claim 2 concerns on invention of Claim 1, Comprising: The said single block laminated core is crimped by the action | operation of the main slide, The said single block laminated core laminated | stacked previously is It is characterized by being moved downward by the operation of the auxiliary slide.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the single block laminated core is supported by an iron core one-side pressure receiving surface fixed to a lower mold of the mold, The previously laminated single block laminated core has a lower end surface supported by the back pressure device, and a side surface disposed below the iron core one side pressure receiving surface and connected to the rollover drive device. It is characterized by being supported by.

  According to the first aspect of the present invention, the thin plate-like work to be conveyed is punched as an iron core piece in the laminating station of the double-acting press, and the punched iron core piece is caulked and laminated in the laminating station. The laminated core laminated by a predetermined number is formed as a single block laminated core, and while the single block laminated core is formed, the previously laminated single block laminated core rotates by a predetermined angle. The single block laminated core newly formed after reaching the predetermined number is crimped with the previously laminated single block laminated core rotated by a predetermined angle, so that the stacked single block laminated core has a thickness of It will be formed as a balanced laminated core. Therefore, the previously laminated single block laminated core can be rotated at a predetermined angle while the newly formed single block laminated core is being crimped, so that it can be operated at high speed without stopping the press. It can be transposed.

  According to the second aspect of the present invention, the core pieces to be crimped are stacked by the operation of the main slide, and the single block stacked core previously stacked is pushed downward and rotated by the operation of the sub-slide. The Accordingly, since the sub slide is operated while the main slide is operating, it is possible to roll over at a high speed operation without stopping the press machine.

  According to the third aspect of the present invention, the single block laminated core that has been crimped by the operation of the main slide is supported by the lower mold core pressing surface, so the single block laminated core rotates. The single block laminated core that has been crimped without being pushed and pushed by the operation of the sub-slide is supported by the back pressure device and the rotating support shaft that rotates, and thus rotates a predetermined angle. . Since the processing of the single block laminated core and the rotation of the previously laminated single block laminated core are performed simultaneously, that is, the single block laminated core previously laminated while the core piece is being processed Since it rotates, it can be transposed at high speed without stopping the press.

It is a simplified sectional view showing a press machine used in the method of transposing a laminated core of the present invention. FIG. 2 is a simplified plan sectional view showing the position of a sub-slide in the slide of FIG. FIG. 2 is a cross-sectional view showing a rolling part in the press machine of FIG. 1. It is an effect | action figure which shows the operation state of a subslide. It is an effect | action figure which shows the state by which the single block lamination | stacking core laminated | stacked previously was extruded by the sub slide. It is an effect | action figure which shows the state in which the new single block laminated core is formed. It is an effect | action figure which shows the state crimped by the single block laminated core by which the new single block laminated core was laminated | stacked previously. It is an effect | action figure which shows the state which discharges | emits one completed laminated core. It is sectional drawing of the metal mold | die which shows the structure of the conventional transposition part.

  Next, the method for transposing the laminated core of the present invention will be described with reference to the drawings. In the present invention, the coil material (thin plate workpiece) conveyed to the press machine is the coil material W, the iron core piece punched from the coil material W is the iron core piece T, and a predetermined number of iron core pieces T are crimped. The single block laminated core formed in this way is referred to as a new intermediate laminated core K1, and the previously laminated single block laminated core is referred to as the previous intermediate laminated core K2. A new intermediate laminated core K1 and the previous intermediate laminated core K2 are caulked to form one synthetic laminated core as a synthetic intermediate laminated core K3, and one completed laminated core as a laminated core K. .

  FIG. 1 is a simplified cross-sectional view showing the entire press 1, and FIG. 2 is a simplified plan cross-sectional view showing the position of the sub-slide 10 in the slide 3. The frame 2 of the press machine 1 is placed on a bed 5 of the frame 2 so as to face the slide 3 and a slide 3 that is arranged to be reciprocated up and down, a crankshaft 4 that moves the slide 3 up and down. Bolster 6 is arranged. As shown in FIG. 3, the upper mold 8 of the mold 7 is mounted on the lower surface of the slide 3, and the lower mold 9 of the mold 7 is mounted on the bolster 6. The coil material W is conveyed between the upper mold 8 and the lower mold 9. The mold 7 has a number of processing stations for producing the laminated core K (see FIG. 8), and the final station is arranged as a laminating station 71.

  In the laminating station 71, the iron core pieces T are punched from the coil material W, and the iron core pieces T adjacent in the vertical direction are caulked and laminated. A secondary slide 10 composed of a hydraulic cylinder is mounted on the upper mold 8 of the stacking station 71 with the piston rod 101 facing downward.

  A punch 11 is slidably disposed in the upper die 8 at a position facing the piston rod 101 of the sub slide 10. The punch 11 has a flange portion 11b having a diameter larger than that of the shaft portion 11a along the axial direction. A spring 12 is disposed below the flange portion 11b and is biased upward by the biasing force of the spring 12. The punch 11 reciprocates up and down together with the slide 3 and is moved downward by the auxiliary slide 10 separately from the movement of the slide 3. The upper die 8 is provided with a stripper 13, and the punch 8 moves up and down while being guided by the stripper 13.

  The lower die 9 is formed with a die 15 facing the punch 11 and receives the punch 11 together with the core piece T punched from the coil material W. The inner peripheral wall surface of the die 15 is formed as an iron core one-side pressure receiving surface 151, and the die receiver 14 is disposed below the die 15. A cylindrical rotation support 16 for rollover is disposed inside the die receiver 14. A pulley 17 is fixedly disposed on the outer peripheral surface of the rolling support 16 for rolling, and the pulley 17 is connected to a drive pulley 19 via a belt 18. In the embodiment, the drive pulley 19 is press-fitted into the drive shaft 201 of the roll drive device 20.

  Also, a new intermediate laminated core K1 and a moving passage 161 for the previous intermediate laminated core K2 are formed inside the cylindrical roll support 16 for rolling, and the moving passage 161 is inserted through the moving passage 161 to be configured by a hydraulic cylinder. A piston rod 221 of the back pressure device 22 is disposed. At the tip of the piston rod 221, a cylindrical core receiving portion 222 having a diameter larger than that of the piston rod 221 is formed to support the punched iron core piece T from below. Further, a discharge cylinder 24 for discharging the laminated core K on the bolster 6 is directed in a direction in which the piston rod 241 is discharged to the outside perpendicularly from the moving passage 151 of the laminated core K (see FIG. 8). Has been placed.

  Note that there is a slight gap between the lower surface of the die 15 and the upper surface of the rolling support portion 16 so that the rotation of the rolling support portion 16 cannot be transmitted to the die 15. In addition, a pressing holding ring (not shown) that directly receives the core piece T is incorporated in the iron core side pressure receiving surface 151 formed on the inner peripheral wall surface of the die 15.

  Next, the operation of the press machine 1 configured as described above will be described with reference to FIGS.

  When the press machine 1 starts operation, the slide 3 reciprocates. On the other hand, the coil material W is conveyed into the press machine 1 from a supply device (not shown) and processed at each processing station of the press machine 1. As shown in FIG. 3, in the laminating station 71, the iron core piece T is punched from the coil material W by the reciprocating motion of the slide 3, and at the same time, punched forward and caulked with the iron core piece T adjacent in the vertical direction. The The side surface of the iron core piece T is supported by the iron core one-side pressure receiving surface 151 of the die 15, and the bottom surface is supported by the core receiving portion 222 of the back pressure device 22.

  When a predetermined number of core pieces T are laminated, they are pushed downward by the secondary slide 10 as a single block intermediate laminated core. When the single block intermediate laminated core of the first block is formed as a new intermediate laminated core K1, as shown in FIG. 4, when the slide 3 is immediately before the bottom dead center position, the secondary slide 10 is moved to the piston rod. It acts to move 101 downward. The downward movement of the piston rod 101 causes the punch 11 to move downward to move the new intermediate laminated core K1 supported by the iron core one-side pressure receiving surface 151 of the die 15 to the moving path of the roll support 16 for rollover. 161 will be moved. As a result, the new intermediate laminated core K1 is positioned as the previous intermediate laminated core K2.

  Next, as shown in FIG. 5, when the slide 3 moves to the top dead center position, the sub-slide 10 moves the piston rod 101 upward, and the punch 11 returns upward due to the biasing force of the spring 12. The previous intermediate laminated core K <b> 2 remains in the moving passage 161 of the roll support for rotation 16.

  When the slide 3 is again moved to the bottom dead center position, as shown in FIG. 6, new core pieces T are punched, and the punched core pieces T are caulked to form a new intermediate of the second block. The laminated core K1 is gradually formed. Since the previous intermediate laminated core K2 is in the movement passage 161 of the roll support for rotation 16, the gap S is formed between the intermediate laminated core K1 and the new intermediate laminated core K1. Therefore, at this time, the new intermediate laminated core K1 and the previous intermediate laminated core K2 are not crimped. In this state, the roll-over drive device 20 is actuated to rotate the drive shaft 201 by a predetermined angle. The rotation of the drive shaft 201 rotates the drive pulley 19 by a predetermined angle and rotates the pulley 17 through the belt 18 by a predetermined angle. The rotation of the predetermined angle is within the range of one rotation of the pulley 17, and the predetermined angle is appropriately determined from the rotation angle and the number of stacked layers depending on the variation in the thickness of the coil material W. The rotation of the pulley 17 rotates the rotation support portion 16 for rolling out by a predetermined angle, and rotates the intermediate laminated core K2 by a predetermined angle. Since the new intermediate laminated core K1 is not influenced by the rotation of the previous intermediate laminated core K2 during the rotation of the previous intermediate laminated core K2, the newly punched iron core piece T is continuously crimped.

  When the iron core piece T crimped in the second block reaches a predetermined number, it is formed as a new intermediate laminated core K1 in the second block, and the sub-slide 10 is activated again. As shown in FIG. 7, immediately before the bottom dead center position of the slide 3, the piston rod 101 is moved downward to lower the punch 11. The new intermediate laminated core K <b> 1 is moved from the position supported by the iron core one-side pressure receiving surface 151 of the die 15 into the movement passage 161 of the roll support rotation support portion 16.

  The new intermediate laminated core K1 of the second block fills the gap S formed with the previous intermediate laminated core K2, and at the same time, the new intermediate laminated core K1 of the second block and the first block The synthetic intermediate laminated core K3 is formed by caulking with the intermediate laminated core K2 at the end of the eye, or it is formed as one completed laminated core K. For example, if the laminated core K is a synthetic intermediate laminated core K3 composed of three or more single-block intermediate laminated cores, as shown in FIG. 6, during the caulking process of the new intermediate laminated core K1 As a result, the roll driving device 20 is rotated by a predetermined angle, and the composite intermediate laminated core K3 is waited in the moving passage 161 until it is caulked with a new intermediate laminated core K1.

  Thus, the single block intermediate | middle laminated core on which the core piece T was laminated | stacked will be formed sequentially. Then, a synthetic intermediate laminated core K3 formed by caulking a new intermediate laminated core K1 to the previous intermediate laminated core K2 is formed, and when the synthetic intermediate laminated core K3 reaches a predetermined number of single block laminated cores, One completed laminated core K will be formed.

  When one laminated core K is formed, the piston rod 221 of the back pressure device 22 is lowered to move the laminated core K to the discharge position 25 as shown in FIG. Then, the discharge cylinder 24 is operated to cause the piston rod 241 to protrude. The laminated core K is discharged to the outside of the mold 7 by the protrusion of the piston rod 241.

  As described above, in the process of transposing a laminated core according to the embodiment, in the process of forming one laminated core K, the iron core piece T is caulked to form a new intermediate laminated core K1. By rotating the intermediate laminated core K2 independently by a predetermined angle, the continuous reciprocating movement of the slide 3 is not stopped or slowed down, so that the press machine 1 can be operated at a high speed. In addition, a new intermediate laminated core K1 is rolled in the process of forming one laminated core K by providing a secondary slide 10 that operates at a different timing from the slide 3 on the slide 3 that continuously moves back and forth. The product can be pushed into the movement passage 161 of the product rotation support 16. By splitting the new intermediate laminated core K1 and the previous intermediate laminated core K2 with a gap S, the previous intermediate laminated core K2 can be independently rotated by a predetermined angle.

  In addition, in the roll-in method of the laminated core of this invention, the structure of the press 1 or the metal mold | die 7 is not limited to the above-mentioned form. For example, the sub-slide 10 may be an air cylinder as long as it can reciprocate at a different timing from the slide 3, or may be mechanically configured other than the cylinder. Further, the roll support for rotation 16 arranged in the lower mold is not rotated by the pulley 17 but may be rotated by, for example, a worm or may be rotated by other known rotating means.

DESCRIPTION OF SYMBOLS 1, Press machine 3, Slide 7, Mold 8, Upper mold 9, Lower mold 10, Sub slide 15, Die 151, Iron core one side pressure receiving surface 16, Roll-in rotation support part 20, Roll-in drive device 22, Back pressure Equipment T, core piece W, coil material (thin plate workpiece)
K1, new intermediate laminated core (single block laminated core)
K2, previous intermediate laminated core (intermediate laminated core laminated first)
K3, synthetic intermediate laminated core K, laminated core

Claims (3)

In a press machine comprising a main slide that reciprocates and a sub-slide that reciprocates at a different timing from the main slide, a laminate that punches a thin plate-like workpiece that is conveyed to form an iron core piece and rolls the iron core piece A core transposition method,
In the laminating station of the press machine, while the core pieces are rolled as a laminated core, a single block laminated core to be laminated in a predetermined number is sequentially formed and a new single block laminated core is laminated. In addition, the previously laminated single block laminated core is independently rotated by a predetermined angle, and after the rotation of the previously laminated single block laminated core, the new single block laminated core is laminated first. A method of transposing a laminated core, characterized in that the single block laminated core is crimped and rolled.   2. The single block laminated core according to claim 1, wherein the single block laminated core is crimped by an operation of a main slide, and the previously laminated single block laminated core is moved downward by an operation of the sub slide. Transposition method of laminated core.   The single block laminated core is supported by an iron core one side pressure receiving surface fixed to the lower mold of the mold, and the lower end surface of the previously laminated single block laminated core is supported by a back pressure device. 3. A method for rolling a laminated core according to claim 1, wherein the side surface is supported by a rotary support shaft disposed below the iron core one side pressure receiving surface and connected to a roll driving device. .

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