Progressive stamping die and rotary guide mechanism for motor core

Abstract

The application relates to the technical field of progressive stamping die, and particularly provides a progressive stamping die for a motor iron core and a rotary guide mechanism. The progressive stamping die for the motor iron core comprises an upper die assembly, four upper guide assemblies, a lower die assembly and four lower buffer assemblies. The application can realize accurate rotary stacking of large-angle rotation, effectively disperses material and feeding errors, ensures uniform stacking and high precision in the progressive stamping process, ensures reliable structure positioning and stable transmission, is suitable for high-speed progressive dies, has high automation degree, low modification cost and long service life, meets the demand of high-end motors, can realize multi-stage gradual buffering, absorbs impact energy step by step, greatly reduces the vibration of the die, prolongs the service life of the equipment, avoids the error accumulation of the rotary mechanism, improves the rotary precision and stability, can realize bidirectional adjustment and buffering, quickly adapts to different working conditions, and is suitable for the progressive stamping of silicon steel sheets with different thicknesses.

Description

Technical Field

[0001] This invention relates to the field of progressive stamping die technology, and in particular to a progressive stamping die and a rotary guide mechanism for motor cores. Background Technology

[0002] As the core magnetic circuit component of a drive motor, the lamination accuracy and production stability of the motor core directly determine the motor's operating efficiency, vibration noise, and service life. With the rapid development of the new energy vehicle industry, drive motors are upgrading towards higher speeds, lower vibrations, and higher efficiency, placing increasingly stringent requirements on the coaxiality, flatness, and consistency of the core. Currently, the industry generally uses progressive dies in conjunction with rotary guide mechanisms to achieve continuous core production.

[0003] Existing rotary stacking mechanisms suffer from large transmission backlash and low positioning accuracy, making it impossible to achieve precise large-angle rotary control. Thickness deviations and feeding errors in the silicon steel sheet strip easily accumulate during stacking, leading to severe magnetic circuit asymmetry. This directly results in high motor vibration, high noise, and reduced efficiency. Furthermore, early rotary structure modifications were costly, had poor operational stability, and short die life, making them unsuitable for high-speed stamping demands exceeding 300 times per minute. Traditional mechanisms rely solely on a single spring or rubber for cushioning, failing to absorb the instantaneous impact of high-speed stamping in stages. This causes severe vibrations during stamping to be transmitted to the die set and rotary mechanism, accelerating wear on the die cutting edge, rotary gears, and guide pillars and bushings. This significantly reduces die life and can easily lead to positioning accuracy drift and accumulated rotary errors in the rotary mechanism, disrupting the uniformity of core stacking. Summary of the Invention

[0004] Therefore, it is necessary to provide a progressive stamping die and a rotary guide mechanism for motor cores to solve at least one of the technical problems in the background art.

[0005] A progressive stamping die for an electric motor core includes an upper die assembly, four upper guide assemblies, a lower die assembly, and four lower pressure-relieving assemblies. The upper die assembly includes an upper stamping connecting shell and an upper progressive stamping die. The top surface of the upper progressive stamping die is mounted on the center of the bottom surface of the upper stamping connecting shell. Upper guide mounting holes are recessed at the four corners of the top surface of the upper progressive stamping die. Each upper guide mounting hole has a guide passage hole recessed in the center of its bottom surface. Upper adjusting grooves are recessed on both sides of the upper guide mounting holes. Upper adjusting drive grooves are recessed at both ends of the top sides of the upper progressive stamping die. The four upper adjusting drive grooves communicate with the four upper adjusting grooves located on the outer sides. Three guide holes are recessed on both sides of the bottom surface of the upper progressive stamping die, and four upper guide... The components are respectively installed in four upper guide mounting holes and four guide through holes. The lower mold assembly includes a lower mold base, a lower progressive stamping die and a progressive stamping plate. The bottom of the lower progressive stamping die is installed on the top of the lower mold base. Lower pressure relief mounting holes are recessed at the four corners of the top surface of the lower progressive stamping die. Lower adjustment grooves are recessed on both sides of the lower pressure relief mounting holes. Lower adjustment drive grooves are recessed at both ends of the middle of both sides of the lower pressure relief mounting holes. The four lower adjustment drive grooves are respectively connected to the four lower adjustment grooves located on the outer side. The top of the progressive stamping plate is slidably installed in the middle of the top surface of the lower progressive stamping die. The four lower pressure relief mounting holes are respectively set opposite to the four upper guide mounting holes. The four lower pressure relief components are respectively installed in the four lower pressure relief mounting holes.

[0006] As a further improvement of the present invention, three lower guide posts are respectively protruding on both sides of the top surface of the lower step stamping die, and the six lower guide posts are respectively arranged opposite to the six guide holes. A rotary guide groove is recessed in the middle of one side of the lower step stamping die, and a rotary hole is recessed in the middle of one end of the top surface of the lower step stamping die. The rotary hole is connected to the rotary guide groove, and a rotary sleeve is provided in the rotary hole.

[0007] As a further improvement of the present invention, each upper guide assembly includes an upper adjusting cylinder, an upper guide seat, an upper adjusting element, and an upper guiding element. The upper adjusting cylinder is installed in the upper adjusting drive groove, and the upper guide seat is installed in the upper guide mounting hole and the guide passage hole. A transverse adjusting slide groove is recessed on the top of one side of the upper guide seat. An upper buffer hole is recessed in the middle of the top surface of the upper guide seat. An upper expansion hole is recessed in the middle of the top surface of the upper buffer hole. A vertical connecting slide hole is recessed in the middle of the top surface of the upper expansion hole. The vertical connecting slide hole communicates with the transverse adjusting slide groove. The upper adjusting element and the upper guiding element are both installed in the upper guide seat.

[0008] As a further improvement of the present invention, the upper adjusting element includes a horizontal slide bar, a vertical slide cylinder, and two synchronous sliders. The horizontal slide bar is slidably installed in the horizontal adjusting groove, and the outer end of the horizontal slide bar passes through the upper adjusting groove and is connected to the output shaft of the upper adjusting cylinder. An upper horizontal sliding shaft is provided in the middle of the horizontal slide bar. The vertical slide cylinder is slidably installed in the vertical connecting slide hole. The bottoms of the two synchronous sliders are respectively installed at both ends of the top surface of the vertical slide cylinder, and an upper inclined sliding groove is recessed in the middle of one side of each synchronous slider. The two ends of the upper horizontal sliding shaft are respectively slidably installed in the two upper inclined sliding grooves.

[0009] As a further improvement of the present invention, the upper guide element includes multiple arc-shaped elastic sheets and a central guide post. The top of the outer wall of the multiple arc-shaped elastic sheets is respectively installed in the upper expansion hole at intervals along the circumferential direction. The top of the inner wall of each arc-shaped elastic sheet is recessed with an inclined arc-shaped surface. The multiple inclined arc-shaped surfaces are slidably attached to the outer wall of the vertical slide cylinder. The top of the central guide post is installed in the middle of the vertical slide cylinder.

[0010] As a further improvement of the present invention, each lower pressure relief assembly includes a lower adjusting cylinder, a lower pressure relief seat, a lower adjusting element, a buffer compression element, and a lower buffer element. The lower adjusting cylinder is installed in the lower adjusting drive groove, the lower pressure relief seat is installed in the lower pressure relief mounting hole, a lower horizontal sliding groove is recessed at the bottom of one side of the lower pressure relief seat, a buffer mounting hole is recessed in the middle of the top surface of the lower pressure relief seat, a lower vertical sliding hole is recessed in the middle of the bottom surface of the buffer mounting hole, and the lower adjusting element, the buffer compression element, and the lower buffer element are all installed in the lower pressure relief seat.

[0011] As a further improvement of the present invention, the lower adjustment element includes a lower adjustment crossbar, a lower vertical sliding cylinder and two lower sliders. The lower adjustment crossbar is slidably installed in the lower horizontal sliding groove, and the outer side of the lower adjustment crossbar passes through the lower adjustment sliding groove and is connected to the output shaft of the lower adjustment cylinder. A lower horizontal sliding shaft is provided in the middle of the lower adjustment crossbar. The lower vertical sliding cylinder is slidably installed in the lower vertical sliding hole. The tops of the two lower sliders are respectively connected to the two ends of the bottom surface of the lower vertical sliding cylinder. A lower inclined sliding groove is recessed in the middle of the side wall of each lower slider. The two ends of the lower horizontal sliding shaft are respectively slidably connected to the two lower inclined sliding grooves.

[0012] As a further improvement of the present invention, the lower buffer element includes a lower buffer slide, a lower collapse cylinder, and a plurality of arc-shaped insert pieces. The bottom of the outer wall of the lower buffer slide is slidably installed on the inner wall of the top of the lower vertical slide. The top of the outer wall of the lower buffer slide is provided with an inverted conical annular block. The middle of the lower buffer slide is provided with a lower guide slide hole. The bottom of the lower collapse cylinder is installed on the top of the lower buffer slide. The middle of the top surface of the lower collapse cylinder is provided with a lower collapse slide hole. The inner ends of the plurality of arc-shaped insert pieces are respectively installed at intervals along the circumferential direction on the outer wall of the lower collapse cylinder. The plurality of arc-shaped insert pieces, the lower collapse cylinder, and the inverted conical annular block are all made of elastic material.

[0013] As a further improvement of the present invention, the buffer compression element includes a buffer compression shell, an elastic buffer ring, and a plurality of intermediate arc-shaped pieces. The bottom of the buffer compression shell is installed at the bottom of the buffer mounting hole, and the outer ends of the plurality of arc-shaped pieces are respectively connected to the top of the inner wall of the buffer compression shell along the circumferential direction. The elastic buffer ring is installed in the middle of the inner cavity of the buffer compression shell. The top and bottom of the elastic buffer ring are respectively provided with conical spring pieces. Two conical spring pieces are respectively installed at the bottom and top of the inner cavity of the buffer compression shell. The bottoms of the plurality of intermediate arc-shaped pieces are respectively installed at intervals along the circumferential direction at the top of the lower vertical sliding hole, and the outer walls of the plurality of intermediate arc-shaped pieces abut against the bottom of the inner wall of the buffer compression shell. The plurality of intermediate arc-shaped pieces and the buffer compression shell are all made of elastic material.

[0014] A rotary guide mechanism for a motor core includes a servo motor frame, an external servo motor, a pinion, a coaxial fixed shaft, a first rotary gear, a second rotary gear, and a third rotary gear. The servo motor frame is mounted on the inner side of the lower-stage stamping die, and is positioned opposite to the rotary guide groove. The external servo motor is mounted on the outer side of the servo motor frame. The pinion is mounted on the output shaft of the external servo motor. The coaxial fixed shaft is rotatably mounted on the inner side of the rotary guide groove. The first rotary gear and the second rotary gear are respectively mounted on the top and bottom of the coaxial fixed shaft, and a synchronous belt is fitted on the first rotary gear and the pinion to achieve a transmission connection. The third rotary gear is mounted on the bottom of the rotary sleeve, and is meshed with the second rotary gear.

[0015] The beneficial effects of this invention are as follows: 1. This solution can achieve precise rotary stacking with large-angle rotation, effectively disperse material and feeding errors, ensure uniform and high-precision stacking during progressive stamping, ensure reliable structural positioning and stable transmission, adapt to high-speed progressive dies, and has a high degree of automation, low modification cost, long service life, and meets the needs of high-end motors.

[0016] 2. This invention enables dual high-precision guidance through the lower and upper mold components and the four upper guide components and four lower pressure buffer components, ensuring precise alignment of the stamping hole positions. It also achieves multi-level progressive buffering, absorbing impact energy step by step, significantly reducing mold closing vibration, extending the service life of the equipment, avoiding the accumulation of errors in the rotary mechanism, improving rotary accuracy and stability, and ensuring the stability of high-speed stamping. In addition, it can utilize the upper guide components and lower pressure buffers to achieve bidirectional adjustment and buffering, quickly adapting to different working conditions and accommodating progressive stamping of silicon steel sheets of various thicknesses. Attached Figure Description

[0017] Figure 1 This is a perspective view of a progressive stamping die for a motor core and a rotary guide mechanism for a motor core, according to an embodiment of the present invention.

[0018] Figure 2 This is a perspective view of a progressive stamping die for a motor core and a rotary guide mechanism for a motor core, according to another embodiment of the present invention.

[0019] Figure 3 This is a perspective view of the upper mold assembly and four upper guide assemblies in one embodiment of the present invention.

[0020] Figure 4 This is a three-dimensional schematic diagram of the upper-stage stamping die in one embodiment of the present invention.

[0021] Figure 5 This is a perspective view of the lower mold assembly, four lower pressure relief assemblies, and the rotary guide mechanism for the motor core in one embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the interior of the lower-level stamping die in one embodiment of the present invention.

[0023] Figure 7 This is a three-dimensional schematic diagram of the upper guide component in one embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the internal structure of the upper guide component in one embodiment of the present invention.

[0025] Figure 9 This is a three-dimensional schematic diagram of the lower pressure relief component in one embodiment of the present invention.

[0026] Figure 10 This is a schematic diagram of the internal structure of the lower pressure relief component in one embodiment of the present invention.

[0027] Figure 11 for Figure 10 Enlarged view of point A in the middle.

[0028] Figure 12 This is a three-dimensional schematic diagram of a rotary guide mechanism and rotary sleeve for a motor core according to an embodiment of the present invention.

[0029] In the picture: 10. Upper mold assembly; 11. Upper stamping connecting shell; 12. Upper progressive stamping die; 121. Upper guide mounting hole; 122. Guide through hole; 123. Upper adjusting slide; 124. Upper adjusting drive groove; 125. Guide hole; 20. Upper guide assembly; 21. Upper adjusting cylinder; 22. Upper guide seat; 221. Lateral adjusting slide; 222. Upper buffer hole; 223. Upper expansion hole; 224. Vertical connecting slide; 23. Upper adjusting element; 231. Horizontal... 232. Sliding bar; 233. Vertical slide cylinder; 234. Synchronous slider; 235. Upper transverse sliding shaft; 236. Upper inclined slide groove; 24. Upper guide element; 247. Arc-shaped elastic sheet; 248. Central guide post; 249. Inclined arc-shaped surface; 30. Lower mold assembly; 31. Lower mold base; 32. Lower progressive stamping die; 321. Lower pressure relief mounting hole; 322. Lower adjusting slide groove; 323. Lower adjusting drive groove; 324. Lower guide post; 325. Rotary guide groove; 3 26. Rotary rotating hole; 327. Rotary sleeve; 33. Progressive stamping plate; 40. Lower pressure relief assembly; 41. Lower adjusting cylinder; 42. Lower pressure relief seat; 421. Lower transverse slide groove; 422. Buffer mounting hole; 423. Lower vertical slide hole; 43. Lower adjusting element; 431. Lower adjusting crossbar; 432. Lower vertical sliding cylinder; 433. Lower slider; 434. Lower transverse slide shaft; 435. Lower inclined slide groove; 44. Buffer compression element; 441. Buffer compression shell; 442. Elastic buffer ring; 443. Intermediate arc-shaped piece; 444. Conical spring piece; 45. Lower buffer element; 451. Lower buffer slide cylinder; 452. Lower collapse cylinder; 453. Arc-shaped insert piece; 454. Inverted conical annular block; 455. Lower guide slide hole; 456. Lower collapse slide hole; 50. Servo motor frame; 51. Pinion gear; 52. Coaxial fixed shaft; 53. First rotary gear; 54. Second rotary gear; 55. Third rotary gear; 56. Synchronous belt. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0031] In the description of this invention, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please see Figures 1 to 12 A progressive stamping die for an electric motor core includes an upper die assembly 10, four upper guide assemblies 20, a lower die assembly 30, and four lower pressure relief assemblies 40. The upper die assembly 10 includes an upper stamping connecting shell 11 and an upper progressive stamping die 12. The top surface of the upper progressive stamping die 12 is mounted on the middle of the bottom surface of the upper stamping connecting shell 11. Upper guide mounting holes 121 are recessed at the four corners of the top surface of the upper progressive stamping die 12. Each upper guide mounting hole 121 has a guide passage hole 122 recessed in the middle of its bottom surface. Upper adjusting grooves 123 are recessed on both sides of the upper guide mounting holes 121. Upper adjusting drive grooves 124 are recessed at both ends of the top sides of the upper progressive stamping die 12. The four upper adjusting drive grooves 124 communicate with the four upper adjusting grooves 123 located on the outer sides. Three guide holes 125 are recessed on both sides of the bottom surface of the upper progressive stamping die 12. The four upper guide assemblies 20... The four lower pressure relief components 40 are respectively installed in the four upper guide mounting holes 121 and the four guide through holes 122. The lower mold assembly 30 includes a lower mold base 31, a lower progressive stamping die 32 and a progressive stamping plate 33. The bottom of the lower progressive stamping die 32 is installed on the top of the lower mold base 31. The four corners of the top surface of the lower progressive stamping die 32 are respectively recessed with lower pressure relief mounting holes 321. The two sides of the lower pressure relief mounting holes 321 are respectively recessed with lower adjustment slide grooves 322. The two ends of the middle of the two sides of the lower pressure relief mounting holes 321 are respectively recessed with lower adjustment drive grooves 323. The four lower adjustment drive grooves 323 are respectively connected to the four lower adjustment slide grooves 322 located on the outer side. The top of the progressive stamping plate 33 is slidably installed in the middle of the top surface of the lower progressive stamping die 32. The four lower pressure relief mounting holes 321 are respectively arranged opposite to the four upper guide mounting holes 121. The four lower pressure relief components 40 are respectively installed in the four lower pressure relief mounting holes 321.

[0034] Three lower guide posts 324 are protruding from both sides of the top surface of the lower-stage stamping die 32. The six lower guide posts 324 are respectively arranged opposite to the six guide holes 125. A rotary guide groove 325 is recessed in the middle of one side of the lower-stage stamping die 32. A rotary rotating hole 326 is recessed in the middle of one end of the top surface of the lower-stage stamping die 32. The rotary rotating hole 326 is connected to the rotary guide groove 325. A rotary sleeve 327 is provided in the rotary rotating hole 326.

[0035] Each upper guide assembly 20 includes an upper adjusting cylinder 21, an upper guide seat 22, an upper adjusting element 23, and an upper guiding element 24. The upper adjusting cylinder 21 is installed in the upper adjusting drive groove 124. The upper guide seat 22 is installed in the upper guide mounting hole 121 and the guide passage hole 122. A transverse adjusting slide groove 221 is recessed on the top side of one side of the upper guide seat 22. An upper buffer hole 222 is recessed in the middle of the top surface of the upper guide seat 22. An upper expansion hole 223 is recessed in the middle of the top surface of the upper buffer hole 222. A vertical connecting slide hole 224 is recessed in the middle of the top surface of the upper expansion hole 223. The vertical connecting slide hole 224 communicates with the transverse adjusting slide groove 221. The upper adjusting element 23 and the upper guiding element 24 are both installed in the upper guide seat 22.

[0036] The upper adjusting element 23 includes a horizontal slide bar 231, a vertical slide cylinder 232, and two synchronous sliders 233. The horizontal slide bar 231 is slidably installed in the horizontal adjusting slide groove 221, and the outer end of the horizontal slide bar 231 passes through the upper adjusting slide groove 123 and is connected to the output shaft of the upper adjusting cylinder 21. An upper horizontal sliding shaft 234 is provided in the middle of the horizontal slide bar 231. The vertical slide cylinder 232 is slidably installed in the vertical connecting slide hole 224. The bottoms of the two synchronous sliders 233 are respectively installed at both ends of the top surface of the vertical slide cylinder 232, and an upper inclined slide groove 235 is recessed in the middle of one side of the synchronous slider 233. The two ends of the upper horizontal slide shaft 234 are respectively slidably installed in the two upper inclined slide grooves 235.

[0037] The upper guide element 24 includes multiple arc-shaped elastic sheets 241 and a central guide post 242. The top of the outer wall of the multiple arc-shaped elastic sheets 241 is installed in the upper expansion hole 223 at intervals along the circumferential direction. The top of the inner wall of each arc-shaped elastic sheet 241 is recessed with an inclined arc-shaped surface 243. The multiple inclined arc-shaped surfaces 243 are all slidably attached to the outer wall of the vertical slide cylinder 232. The top of the central guide post 242 is installed in the middle of the vertical slide cylinder 232.

[0038] Each lower pressure relief assembly 40 includes a lower adjusting cylinder 41, a lower pressure relief seat 42, a lower adjusting element 43, a buffer compression element 44, and a lower buffer element 45. The lower adjusting cylinder 41 is installed in the lower adjusting drive groove 323, the lower pressure relief seat 42 is installed in the lower pressure relief mounting hole 321, a lower horizontal sliding groove 421 is recessed on one side of the bottom of the lower pressure relief seat 42, a buffer mounting hole 422 is recessed in the middle of the top surface of the lower pressure relief seat 42, a lower vertical sliding hole 423 is recessed in the middle of the bottom surface of the buffer mounting hole 422, and the lower adjusting element 43, the buffer compression element 44, and the lower buffer element 45 are all installed in the lower pressure relief seat 42.

[0039] The lower adjusting element 43 includes a lower adjusting horizontal bar 431, a lower vertical sliding cylinder 432, and two lower sliding blocks 433. The lower adjusting horizontal bar 431 is slidably installed in the lower horizontal sliding groove 421, and the outer side of the lower adjusting horizontal bar 431 passes through the lower adjusting sliding groove 322 and is connected to the output shaft of the lower adjusting cylinder 41. A lower horizontal sliding shaft 434 is provided in the middle of the lower adjusting horizontal bar 431. The lower vertical sliding cylinder 432 is slidably installed in the lower vertical sliding hole 423. The tops of the two lower sliding blocks 433 are respectively connected to the two ends of the bottom surface of the lower vertical sliding cylinder 432. A lower inclined sliding groove 435 is recessed in the middle of the side wall of each lower sliding block 433. The two ends of the lower horizontal sliding shaft 434 are slidably connected to the two lower inclined sliding grooves 435 respectively.

[0040] The lower buffer element 45 includes a lower buffer slide cylinder 451, a lower collapse cylinder 452, and multiple arc-shaped insert pieces 453. The bottom of the outer wall of the lower buffer slide cylinder 451 is slidably installed on the inner top wall of the lower vertical slide cylinder 432. The top of the outer wall of the lower buffer slide cylinder 451 is provided with an inverted conical annular block 454. The middle of the lower buffer slide cylinder 451 is recessed with a lower guide slide hole 455. The bottom of the lower collapse cylinder 452 is installed on the top of the lower buffer slide cylinder 451. The middle of the top surface of the lower collapse cylinder 452 is recessed with a lower collapse slide hole 456. The inner ends of the multiple arc-shaped insert pieces 453 are respectively installed at intervals along the circumferential direction on the outer wall of the lower collapse cylinder 452. The multiple arc-shaped insert pieces 453, the lower collapse cylinder 452, and the inverted conical annular block 454 are all made of elastic material.

[0041] The buffer compression element 44 includes a buffer compression shell 441, an elastic buffer ring 442, and a plurality of intermediate arc-shaped pieces 443. The bottom of the buffer compression shell 441 is installed at the bottom of the buffer mounting hole 422, and the outer ends of the plurality of arc-shaped insert pieces 453 are respectively connected to the top of the inner wall of the buffer compression shell 441 along the circumferential direction. The elastic buffer ring 442 is installed in the middle of the inner cavity of the buffer compression shell 441. The top and bottom of the elastic buffer ring 442 are respectively provided with conical spring pieces 444. The two conical spring pieces 444 are respectively installed at the bottom and top of the inner cavity of the buffer compression shell 441. The bottoms of the plurality of intermediate arc-shaped pieces 443 are respectively installed at intervals along the circumferential direction at the top of the lower vertical sliding hole 423, and the outer walls of the plurality of intermediate arc-shaped pieces 443 all abut against the bottom of the inner wall of the buffer compression shell 441. The plurality of intermediate arc-shaped pieces 443 and the buffer compression shell 441 are all made of elastic material.

[0042] Please see Figure 1 , 2 5 and Figure 12 A rotary guide mechanism for a motor core includes a servo motor frame 50, an external servo motor, a pinion 51, a coaxial fixed shaft 52, a first rotary gear 53, a second rotary gear 54, and a third rotary gear 55. The servo motor frame 50 is mounted on the middle of one side of the lower-stage stamping die 32, and the servo motor frame 50 is opposite to the rotary guide groove 325. The external servo motor is mounted on the outside of the servo motor frame 50. The pinion 51 is mounted on the output shaft of the external servo motor. The coaxial fixed shaft 52 is rotatably mounted on the inside of the rotary guide groove 325. The first rotary gear 53 and the second rotary gear 54 are respectively mounted on the top and bottom of the coaxial fixed shaft 52, and a synchronous belt 56 is sleeved on the first rotary gear 53 and the pinion 51 to achieve a transmission connection. The third rotary gear 55 is mounted on the bottom of the rotary sleeve 327, and the third rotary gear 55 is meshed with the second rotary gear 54.

[0043] For example, in one embodiment: the bottom surface of the upper stamping die 12 is provided with a positioning pin, and the circumferential surface of the rotary sleeve 327 is provided with a positioning hole. The positioning hole and the positioning pin are arranged opposite to each other, so that the rotary guide pin can fall into the preset hole of the stamping piece at one time, realizing high-precision initial positioning, and combined with hydraulic / pneumatic ejection, realizing automatic material discharge.

[0044] For example, in one embodiment: when rotary stacking is performed, an external servo motor will be started, which will drive the pinion 51 to rotate, thereby causing the first rotary gear 53, the coaxial fixed shaft 52 and the second rotary gear 54 to rotate, which in turn causes the third rotary gear 55 and the rotary sleeve 327 to rotate, and the silicon steel sheet on the rotary sleeve 327 to rotate. The rotation angle is set according to the stamping design requirements (preferably any angle within the range of 0-360°), so that after a certain number of sheets are stamped, the mechanism drives the stacked iron chip to rotate at a large angle (such as 180° segmented rotation, specific torsion angle, etc.), so as to achieve precise rotational alignment of skewed slot stacking or irregular iron core.

[0045] For example, in one embodiment: before progressive stamping, the top of the upper stamping connecting shell 11 is connected to the stamping end of the progressive stamping machine, and then the lower die holder 31 is placed on the worktable of the progressive stamping machine, so that the six lower guide posts 324 are respectively arranged opposite to the six guide holes 125, and the four upper guide components 20 are respectively arranged opposite to the four lower pressure relief components 40. Then the stamping piece is placed on the top surface of the progressive stamping plate 33, and then the progressive stamping machine is started, driving the upper die assembly 10 to carry the four upper guide components 20 downward, so that the six lower guide posts 324 are respectively inserted into the six guide holes 125 for guidance. This causes the central guide posts 242 of the four upper guide components 20 to be inserted into the lower collapse sliding holes 456 and lower guide sliding holes 455 of the four lower pressure-relieving components 40, respectively. During the insertion process, the lower collapse cylinder 452 will enter the inner wall of multiple arc-shaped elastic pieces 241, and the multiple arc-shaped elastic pieces 241 will be inserted into multiple arc-shaped insert pieces 453, until the bottom of the multiple arc-shaped elastic pieces 241 abuts against the top surface of the inverted cone annular block 454, and continues to move downward with the upper mold assembly 10, thereby compressing the inverted cone annular block 454 and the lower pressure-relieving components 40. The impact cylinder 451 moves downward, thereby squeezing the tops of multiple intermediate arc-shaped plates 443 outward, squeezing the bottom of the buffer compression shell 441, and initially buffering the impact until the top surface of the upper buffer hole 222 abuts against the top surface of the buffer compression shell 441. When the impact continues, the middle part of the buffer compression shell 441 will be compressed, the two conical spring plates 444 will be compressed, and the lower collapse cylinder 452 will be compressed and deformed until the bottom surface of the central guide column 242 abuts against the bottom surface of the lower vertical sliding cylinder 432, further buffering the impact and ensuring the effect of buffering and vibration reduction.

[0046] In addition, when the buffering effect needs to be adjusted, the lower adjusting cylinder 41 can be activated, thereby driving the lower adjusting crossbar 431 to move laterally, which in turn causes the lower transverse sliding shaft 434 to move accordingly. Since the two ends of the lower transverse sliding shaft 434 are slidably connected to the two lower inclined sliding grooves 435 respectively, the two lower sliding blocks 433 and the lower vertical sliding cylinder 432 move vertically, thereby pushing the lower buffer sliding cylinder 451, the lower collapse cylinder 452 and the multiple arc-shaped insert pieces 453, which are slidably set in the lower vertical sliding cylinder 432, to move accordingly. The movement of the upper regulating cylinder 21 adjusts the sliding distance of the lower buffer slide 451, thereby regulating the compression process and the buffering effect. Simultaneously, the upper regulating cylinder 21 drives the transverse slide bar 231 to move laterally along the transverse regulating groove 221. Since the two ends of the upper transverse sliding shaft 234 are slidably mounted on two upper inclined grooves 235, the two synchronous sliders 233 and the vertical slide 232 move accordingly, thus adjusting the position of the central guide post 242 and the vertical slide 232. When the vertical slide 232 moves, the inclined arc surfaces 243 of multiple arc-shaped elastic plates 241 slide against the outer wall of the vertical slide 232, adjusting the outward expansion of the arc-shaped elastic plates 241. This adjusts the buffering effect when the arc-shaped elastic plates 241 are inserted into the arc-shaped insertion piece 453, thereby regulating the overall compression and downward pressing process, and thus coordinating the lower regulating cylinder 41 and the lower regulating element 43 to adjust the buffering effect.

[0047] Installation process: The top surface of the upper progressive stamping die 12 is installed on the middle of the bottom surface of the upper stamping connecting shell 11. The bottom of the lower progressive stamping die 32 is installed on the top of the lower die holder 31. The top of the progressive stamping plate 33 is slidably installed on the middle of the top surface of the lower progressive stamping die 32. The upper adjusting cylinder 21 is installed in the upper adjusting drive groove 124. The upper guide seat 22 is installed in the upper guide mounting hole 121 and the guide through hole 122. The transverse slide bar 231 is slidably installed in the transverse adjusting slide groove 221, and the outer end of the transverse slide bar 231 passes through the upper adjusting slide groove 123 and is connected to the output shaft of the upper adjusting cylinder 21. The vertical slide cylinder 232... The two synchronous sliders 233 are slidably installed in the vertical connecting sliding hole 224. The bottoms of the two synchronous sliders 233 are respectively installed at both ends of the top surface of the vertical sliding cylinder 232. The two ends of the upper transverse sliding shaft 234 are respectively slidably installed in the two upper inclined sliding grooves 235. The tops of the outer walls of multiple arc-shaped elastic plates 241 are respectively installed in the upper expansion hole 223 at intervals along the circumferential direction. The top of the central guide post 242 is installed in the middle of the vertical sliding cylinder 232. The lower adjusting cylinder 41 is installed in the lower adjusting drive groove 323. The lower pressure relief seat 42 is installed in the lower pressure relief mounting hole 321. The lower adjusting crossbar 431 is slidably installed in the lower transverse sliding groove 421 and adjusted downwards. The outer side of the horizontal bar 431 is connected to the output shaft of the lower adjusting cylinder 41 via the lower adjusting groove 322. The lower vertical sliding cylinder 432 is slidably installed in the lower vertical sliding hole 423. The tops of the two lower sliding blocks 433 are respectively connected to the two ends of the bottom surface of the lower vertical sliding cylinder 432. The two ends of the lower horizontal sliding shaft 434 are respectively slidably connected to the two lower inclined grooves 435. The bottom of the outer wall of the lower buffer cylinder 451 is slidably installed on the top inner wall of the lower vertical sliding cylinder 432. The bottom of the lower collapse cylinder 452 is installed on the top of the lower buffer cylinder 451. The inner ends of multiple arc-shaped insert pieces 453 are respectively installed at intervals along the circumferential direction on the lower collapse cylinder. The outer wall of the buffer compression shell 441 is installed at the bottom of the buffer mounting hole 422, and the outer ends of multiple arc-shaped insert pieces 453 are respectively connected to the top of the inner wall of the buffer compression shell 441 along the circumferential direction. The elastic buffer ring 442 is installed in the middle of the inner cavity of the buffer compression shell 441. Two conical spring pieces 444 are respectively installed at the bottom and top of the inner cavity of the buffer compression shell 441. The bottoms of multiple intermediate arc-shaped pieces 443 are respectively installed at intervals along the circumferential direction at the top of the lower vertical sliding hole 423, and the outer walls of multiple intermediate arc-shaped pieces 443 all abut against the bottom of the inner wall of the buffer compression shell 441.

[0048] The servo motor frame 50 is installed on the inner side of the middle of the lower step stamping die 32, and the servo motor frame 50 is opposite to the rotary guide groove 325. The external servo motor is installed on the outer side of the servo motor frame 50. The pinion 51 is installed on the output shaft of the external servo motor. The coaxial fixed shaft 52 is rotatably installed on the inner side of the rotary guide groove 325. The first rotary gear 53 and the second rotary gear 54 are respectively installed on the top and bottom of the coaxial fixed shaft 52. The third rotary gear 55 is installed on the bottom of the rotary sleeve 327, and the third rotary gear 55 is meshed with the second rotary gear 54.

[0049] This invention can achieve: 1. This solution can achieve precise rotary stacking with large-angle rotation, effectively disperse material and feeding errors, ensure uniform and high-precision stacking during progressive stamping, ensure reliable structural positioning and stable transmission, adapt to high-speed progressive dies, and has a high degree of automation, low modification cost, long service life, and meets the needs of high-end motors.

[0050] 2. This invention enables dual high-precision guidance through the lower mold assembly 30 and the upper mold assembly 10, as well as the guiding and buffering of four upper guide assemblies 20 and four lower pressure buffer assemblies 40. This ensures precise alignment of the stamping hole positions and achieves multi-level progressive buffering, absorbing impact energy step by step, significantly reducing mold closing vibration, extending the service life of the equipment, avoiding the accumulation of errors in the rotary mechanism, improving rotary accuracy stability, and ensuring the stability of high-speed stamping. In addition, the upper guide assembly 20 and the lower pressure buffer assembly 40 can be used to achieve bidirectional adjustment and buffering, quickly adapting to different working conditions and adapting to progressive stamping of silicon steel sheets of various thicknesses.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A progressive stamping die for an electric motor core, characterized in that: The assembly includes an upper mold assembly (10), four upper guide assemblies (20), a lower mold assembly (30), and four lower pressure relief assemblies (40). The upper mold assembly (10) includes an upper stamping connecting shell (11) and an upper-stage stamping die (12). The top surface of the upper-stage stamping die (12) is mounted on the middle of the bottom surface of the upper stamping connecting shell (11). The four corners of the top surface of the upper-stage stamping die (12) are respectively provided with upper guide mounting holes (121). Each upper guide mounting hole (121) has a central portion on the bottom surface. The upper guide hole (121) is recessed with a guide through hole (122), and upper adjusting grooves (123) are recessed on both sides of the upper guide mounting hole (121). Upper adjusting drive grooves (124) are recessed at both ends of the top of the upper step stamping die (12). The four upper adjusting drive grooves (124) are respectively connected to the four upper adjusting grooves (123) located on the outer side. Three guide holes (125) are recessed on both sides of the bottom surface of the upper step stamping die (12). The four upper guide components (20) are respectively installed on the four guide holes (125). The lower mold assembly (30) includes a lower mold base (31), a lower progressive stamping die (32), and a progressive stamping plate (33) in the upper guide mounting hole (121) and four guide through holes (122). The bottom of the lower progressive stamping die (32) is mounted on the top of the lower mold base (31). The four corners of the top surface of the lower progressive stamping die (32) are respectively provided with lower pressure relief mounting holes (321). The lower pressure relief mounting holes (321) are respectively provided with lower adjustment grooves (322) on both sides. The two ends of the middle part of the hole (321) are respectively provided with a lower adjustment drive groove (323). The four lower adjustment drive grooves (323) are respectively connected to the four lower adjustment slide grooves (322) located on the outside. The top of the progressive stamping plate (33) is slidably installed on the middle part of the top surface of the lower progressive stamping die (32). The four lower pressure relief mounting holes (321) are respectively arranged opposite to the four upper guide mounting holes (121). The four lower pressure relief components (40) are respectively installed in the four lower pressure relief mounting holes (321).

2. The progressive stamping die for motor cores according to claim 1, characterized in that: The lower-level stamping die (32) has three lower guide posts (324) protruding from both sides of its top surface. The six lower guide posts (324) are respectively arranged opposite to the six guide holes (125). A rotary guide groove (325) is recessed in the middle of one side of the lower-level stamping die (32). A rotary rotating hole (326) is recessed in the middle of one end of the top surface of the lower-level stamping die (32). The rotary rotating hole (326) is connected to the rotary guide groove (325). A rotary sleeve (327) is provided in the rotary rotating hole (326).

3. The progressive stamping die for an electric motor core according to claim 2, characterized in that: Each upper guide assembly (20) includes an upper adjusting cylinder (21), an upper guide seat (22), an upper adjusting element (23), and an upper guiding element (24). The upper adjusting cylinder (21) is installed in the upper adjusting drive groove (124). The upper guide seat (22) is installed in the upper guide mounting hole (121) and the guide passage hole (122). A horizontal adjusting groove (221) is recessed on the top side of the upper guide seat (22). An upper buffer hole (222) is recessed in the middle of the top surface of the upper guide seat (22). An upper expansion hole (223) is recessed in the middle of the top surface of the upper buffer hole (222). A vertical connecting slide hole (224) is recessed in the middle of the top surface of the upper expansion hole (223). The vertical connecting slide hole (224) is connected to the horizontal adjusting groove (221). The upper adjusting element (23) and the upper guiding element (24) are both installed in the upper guide seat (22).

4. The progressive stamping die for an electric motor core according to claim 3, characterized in that: The upper adjustment element (23) includes a horizontal slide bar (231), a vertical slide cylinder (232), and two synchronous sliders (233). The horizontal slide bar (231) is slidably installed in the horizontal adjustment groove (221), and the outer end of the horizontal slide bar (231) passes through the upper adjustment groove (123) and is connected to the output shaft of the upper adjustment cylinder (21). An upper horizontal slide shaft (234) is provided in the middle of the horizontal slide bar (231). The vertical slide cylinder (232) is slidably installed in the vertical connecting slide hole (224). The bottoms of the two synchronous sliders (233) are respectively installed at both ends of the top surface of the vertical slide cylinder (232), and an upper inclined slide groove (235) is recessed in the middle of one side of the synchronous slider (233). The two ends of the upper horizontal slide shaft (234) are respectively slidably installed in the two upper inclined slide grooves (235).

5. The progressive stamping die for an electric motor core according to claim 4, characterized in that: The upper guide element (24) includes multiple arc-shaped elastic sheets (241) and a central guide post (242). The top of the outer wall of the multiple arc-shaped elastic sheets (241) is installed in the upper expansion hole (223) at intervals along the circumferential direction. The top of the inner wall of each arc-shaped elastic sheet (241) is recessed with an inclined arc surface (243). The multiple inclined arc surfaces (243) are all slidably attached to the outer wall of the vertical slide cylinder (232). The top of the central guide post (242) is installed in the middle of the vertical slide cylinder (232).

6. The progressive stamping die for an electric motor core according to claim 5, characterized in that: Each lower pressure relief assembly (40) includes a lower adjusting cylinder (41), a lower pressure relief seat (42), a lower adjusting element (43), a buffer compression element (44), and a lower buffer element (45). The lower adjusting cylinder (41) is installed in the lower adjusting drive groove (323), and the lower pressure relief seat (42) is installed in the lower pressure relief mounting hole (321). A lower horizontal sliding groove (421) is recessed at the bottom of one side of the lower pressure relief seat (42), a buffer mounting hole (422) is recessed in the middle of the top surface of the lower pressure relief seat (42), and a lower vertical sliding hole (423) is recessed in the middle of the bottom surface of the buffer mounting hole (422). The lower adjusting element (43), the buffer compression element (44), and the lower buffer element (45) are all installed in the lower pressure relief seat (42).

7. The progressive stamping die for an electric motor core according to claim 6, characterized in that: The lower adjustment element (43) includes a lower adjustment bar (431), a lower vertical sliding cylinder (432), and two lower sliders (433). The lower adjustment bar (431) is slidably installed in the lower horizontal sliding groove (421), and the outer side of the lower adjustment bar (431) is connected to the output shaft of the lower adjustment cylinder (41) through the lower adjustment sliding groove (322). A lower horizontal sliding shaft (434) is provided in the middle of the lower adjustment bar (431). The lower vertical sliding cylinder (432) is slidably installed in the lower vertical sliding hole (423). The tops of the two lower sliders (433) are respectively connected to the two ends of the bottom surface of the lower vertical sliding cylinder (432). A lower inclined sliding groove (435) is recessed in the middle of the side wall of each lower slider (433). The two ends of the lower horizontal sliding shaft (434) are respectively slidably connected to the two lower inclined sliding grooves (435).

8. The progressive stamping die for an electric motor core according to claim 7, characterized in that: The lower buffer element (45) includes a lower buffer slide (451), a lower collapse cylinder (452) and multiple arc-shaped insert pieces (453). The bottom of the outer wall of the lower buffer slide (451) is slidably installed on the inner wall of the top of the lower vertical slide (432). The top of the outer wall of the lower buffer slide (451) is provided with an inverted cone-shaped annular block (454). The middle of the lower buffer slide (451) is recessed with a lower guide slide hole (455). The bottom of the lower collapse cylinder (452) is installed on the top of the lower buffer slide (451). The middle of the top surface of the lower collapse cylinder (452) is recessed with a lower collapse slide hole (456). The inner ends of the multiple arc-shaped insert pieces (453) are respectively installed at intervals along the circumferential direction on the outer wall of the lower collapse cylinder (452). The multiple arc-shaped insert pieces (453), the lower collapse cylinder (452) and the inverted cone-shaped annular block (454) are all made of elastic material.

9. The progressive stamping die for an electric motor core according to claim 7, characterized in that: The buffer compression element (44) includes a buffer compression shell (441), an elastic buffer ring (442), and multiple intermediate arc-shaped pieces (443). The bottom of the buffer compression shell (441) is installed at the bottom of the buffer mounting hole (422), and the outer ends of the multiple arc-shaped insert pieces (453) are respectively connected to the top of the inner wall of the buffer compression shell (441) along the circumferential direction. The elastic buffer ring (442) is installed in the middle of the internal cavity of the buffer compression shell (441). 42) Conical spring pieces (444) are respectively protruding from the top and bottom. The two conical spring pieces (444) are respectively installed at the bottom and top of the internal cavity of the buffer compression shell (441). The bottoms of multiple intermediate arc-shaped pieces (443) are respectively installed at intervals along the circumferential direction at the top of the lower vertical sliding hole (423). The outer walls of multiple intermediate arc-shaped pieces (443) all abut against the bottom of the inner wall of the buffer compression shell (441). The multiple intermediate arc-shaped pieces (443) and the buffer compression shell (441) are all made of elastic material.

10. A rotary guide mechanism for an electric motor core, characterized in that: The assembly includes a servo motor frame (50), an external servo motor, a pinion (51), a coaxial fixed shaft (52), a first rotary gear (53), a second rotary gear (54), and a third rotary gear (55). The servo motor frame (50) is installed on the inner side of the middle of one side of the lower-level stamping die (32), and the servo motor frame (50) is opposite to the rotary guide groove (325). The external servo motor is installed on the outer side of the servo motor frame (50), and the pinion (51) is installed on the outer side of the external servo motor. On the output shaft, a coaxial fixed shaft (52) is rotatably mounted inside the rotary guide groove (325). The first rotary gear (53) and the second rotary gear (54) are respectively mounted on the top and bottom of the coaxial fixed shaft (52). A synchronous belt (56) is fitted on the first rotary gear (53) and the pinion (51) to achieve a transmission connection. The third rotary gear (55) is mounted on the bottom of the rotary sleeve (327), and the third rotary gear (55) meshes with the second rotary gear (54).

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