A device for eliminating the plate difference of a motor rotor sheet

Abstract

This invention discloses a device for eliminating the in-plate difference of motor rotor laminations, relating to the field of motor stator and rotor processing. It aims to solve the problems of low automation, high labor intensity for workers, and low utilization rate of existing devices. The device includes a steel coil support frame. Along the side of the steel coil support frame during the stamping process of the steel plate, a leveling machine, a first stamping machine, a servo feeder, and a second stamping machine are sequentially fixedly connected. Both the first and second stamping machines include a power unit, an upper die holder, a lower die holder, a carrier plate, and an angle adjuster. The upper die holder is located at the power unit... The carrier plate is located at the bottom of the upper die base, and the angle adjuster is located inside the upper die base. The first and second stamping machines complete the stamping process by vertically moving the upper die base relative to the lower die base. The second stamping machine has a material receiving port on its side, and a fixed frame is provided below the material receiving port. A scrap restrainer is provided on the fixed frame, and a steel plate coiling frame is fixedly connected to the side of the fixed frame. The advantages are: improving the utilization rate of raw steel plates, reducing the difference between plates by rotating the stamping, ensuring the stability of the motor rotor, simplifying the production steps, and increasing industrial production capacity.

Description

Technical Field

[0001] This invention relates to the field of motor stator and rotor processing technology, and in particular to a device for eliminating the difference between motor rotor laminations and the same plate. Background Technology

[0002] In electric motors, both the stator and rotor require an iron core to transmit and concentrate the magnetic field. Since iron is a magnetic material, it can effectively guide and concentrate magnetic field lines, thereby improving motor efficiency. However, if the iron core were made from a single piece of iron, significant eddy current and hysteresis losses would occur within it under alternating magnetic fields, causing the core to heat up and reducing motor efficiency. To address this issue, engineers designed the iron core to be composed of many stacked thin steel plates. This creates numerous tiny air gaps between the steel plates, effectively cutting off eddy current loops and reducing eddy current losses. Simultaneously, the hysteresis losses from the thin steel plates are also relatively low. Therefore, this design significantly improves motor efficiency.

[0003] The existing production mode of stator and rotor core laminations for large motors is mostly based on high-speed single-slot punch presses. However, due to the thickness deviation between different sides of the steel plate during the production process, if the lamination angle does not change during the lamination process, the error of the steel plate will be amplified geometrically after the laminations are stacked, which will cause the produced motor to vibrate and affect the performance of the motor.

[0004] Chinese patent application number "CN201720534110.5" discloses: "A placement rack for placing silicon steel sheet raw material plates, including a placement rack body, a rotating shaft provided under the placement rack, and a servo motor connected to the rotating shaft. The servo motor is connected to control the rotating shaft. A phototube is provided on the side of the placement rack. The phototube and the servo motor are connected to a control device. The phototube measures the number of silicon steel sheet raw material plates to be processed and transmits the information to the control device. After a certain number of silicon steel sheet raw material plates are taken out from the placement rack body, the servo motor rotates the rotating shaft by 90°." This method eliminates the difference in the same plate by dividing the steel plate into different small pieces and then placing the divided steel plates at different angles. However, in actual use, construction workers need to cut the steel plates first. The cut steel plates are then manually pushed to the punching area for punching. Manual handling of the steel plates is required during construction, resulting in low automation and high labor intensity for workers. Furthermore, cutting the steel plates into pieces, each piece being larger than the size of the plate to be punched, increases the waste material after punching, thus increasing production costs. In summary, existing devices for eliminating rotor misalignment in motors suffer from low efficiency and low utilization of operating principles, which are detrimental to improving factory capacity and efficiency. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a method and apparatus for eliminating the difference between the same plate of motor rotor laminations, which solves the problems of low automation level, high labor intensity of workers and low utilization rate of principle in the existing apparatus.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a steel coil support frame. Along the side of the steel coil support frame during the stamping process of the steel plate, a leveling machine, a first stamping machine, a servo feeder, and a second stamping machine are sequentially and fixedly connected. The first stamping machine and the second stamping machine each include a power unit, an upper die base, a lower die base, a carrier plate, and an angle adjuster. The upper die base is located below the power unit, the carrier plate is located at the bottom of the upper die base, and the angle adjuster is located inside the upper die base. The first stamping machine and the second stamping machine complete the stamping process by vertically moving the upper die base relative to the lower die base. The second stamping machine has a material take-up port on its side, and a fixed frame is provided below the material take-up port. A scrap restrainer is provided on the fixed frame, and a steel plate coil take-up frame is fixedly connected to the side of the fixed frame.

[0007] The angle adjuster includes a grooved wheel, a dial, a first gear, a second gear, and a drive shaft. The grooved wheel is fixedly connected to the carrier plate. The dial is fitted on one side of the grooved wheel. The first gear is fixedly connected to the dial. The first gear and the second gear mesh. The second gear is fixedly connected to the drive shaft. The drive shaft is provided with a first guide groove, a second guide groove, and a third guide groove. The first guide groove spirals around the drive shaft. The second guide groove is vertically connected to the beginning and end of the first guide groove. The depth of the lower end of the second guide groove is greater than the depth of the lower end of the first guide groove. The depth of the upper end of the second guide groove is less than the depth of the upper end of the first guide groove. The third guide groove communicates with the second guide groove. The depth of the third guide groove is greater than the depth of the upper end of the first guide groove. A connecting pin is slidably connected in the first guide groove, the second guide groove, and the third guide groove. A fixing block is slidably connected to the connecting pin. A spring is provided between the fixing block and the connecting pin to exert an outward force on the connecting pin. The fixing block is fixedly connected to a stamping press or a second stamping press.

[0008] The waste restraint includes an upper pressure roller and a lower pressure roller. The distance between the upper pressure roller and the lower pressure roller is equal to the thickness of the steel plate. Both the upper pressure roller and the lower pressure roller are rotatably connected to the fixed frame.

[0009] Preferably, a material feeder is provided on the upper side of the fixing frame and the steel plate winding frame, the material feeder's feeding component is higher than the feeding port, and a material carrier plate is provided below the material feeder.

[0010] Preferably, the material handler includes a first support, a first slide, a tray, and a first electromagnetic chuck. The first support is provided with a slide rail for the first slide to slide. The first slide is fixedly connected to the tray. The lower side of the tray is fixedly connected to the first electromagnetic chuck. The material carrier is slidably connected to a fixed platform. The fixed platform is fixedly connected to the fixed frame.

[0011] Preferably, the feeder further includes a second support, a second slide, a circulation device, and a plurality of second electromagnetic chucks. The second slide is slidably connected to the second support, the circulation device is mounted on the second slide, and the second electromagnetic chucks are fixedly mounted on the circulation device at equal intervals.

[0012] Preferably, a material drop bar is fixedly connected to the middle of the material carrier plate.

[0013] Preferably, a punch head is fixedly connected to the lower side of each of the carrier plates. A first punch is fixedly connected to the bottom of the carrier plate of the first punch. A second punch is provided on the side of the first punch. A first blanking hole is provided on the lower side of the first punch. A plurality of second blanking holes are provided on the lower die base below the second punch. The number of second blanking holes corresponds to the number of grooves of the grooved wheel. The first blanking hole and the second blanking hole are located on the lower die base of the first punch.

[0014] Preferably, a drain hole is provided on the lower side of the first discharge hole and the second discharge hole. The drain hole has a frustum structure, and a waste pool is provided below the drain hole.

[0015] Preferably, a leveling roller is rotatably connected to the leveling machine, and a synchronization mechanism is provided between the leveling roller and the lower pressure roller. The synchronization mechanism includes a first pulley, a second pulley, and a belt. The first pulley is fixedly connected to the leveling roller, the second pulley is fixedly connected to the lower pressure roller, and the belt is installed on the first pulley and the second pulley.

[0016] Preferably, the bundled steel coils are fixed to a steel coil support frame. After unwinding the coils, one side of the steel plate is straightened and flattened using a leveling machine. The flattened steel coils then enter the first stamping press. A servo feeder on the side of the first stamping press pulls the steel plate to move. After moving a certain distance, the servo feeder stops. At this time, the power unit on the first stamping press performs the first punching operation on the steel plate through the upper die holder. The punching waste falls into the waste pool through the first and second drop holes. Then, during the return stroke of the upper die holder, the angle adjuster drives the carrier plate on the upper die holder to rotate by an angle. Simultaneously, the steel plate undergoes the first process... The steel plate enters the second stamping press under the drive of the servo feeder. When the center of the through hole opened in the first process of the steel plate is detected to be aligned with the center of the carrier plate on the second stamping press, the upper die holder on the second stamping press falls to perform the second process of punching on the steel plate. After punching, when the upper die holder rises, the carrier plate on the second stamping press will also rotate at the same angle as the carrier plate on the first stamping press under the action of the angle adjuster, so as to ensure that the inner hole of the punching die corresponds to the groove on the side of the punching die. The punched plate is taken out through the feeding port, and the waste plate is then coiled up by the steel coil take-up rack through the fixed frame.

[0017] The key advantages of this invention compared to existing technologies are:

[0018] The present invention includes a first stamping machine and a second stamping machine for the first and second processes of stamping dies, omitting the process of steel plate cutting, improving the degree of automation, reducing labor, and improving production efficiency.

[0019] This invention involves directly stamping on a steel plate, reducing the amount of waste between two stamped sheets, improving raw material utilization, and reducing resource waste.

[0020] The present invention adds an angle adjuster to the upper die base, so that the carrier plate on the upper die base rotates at an angle after a single stamping, thereby placing the positioning holes on the stamping laminations at different positions on the steel plate. This reduces the plate difference between the stamping laminations when assembling multiple stamping laminations and improves the stability of the motor stator and rotor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first axial structure of the first embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the second axial structure of the first embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the forward structure of the first embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the first stamping machine of the present invention.

[0025] Figure 5This is a schematic diagram of the cooperative structure of the first and second stamping machines of the present invention.

[0026] Figure 6 This is a schematic diagram of the combined structure of the second stamping press and the feeder of the present invention.

[0027] Figure 7 This is a schematic diagram of the cooperation structure between the second stamping machine and the steel plate coil rack of the present invention.

[0028] Figure 8 This is a schematic diagram of the forward structure of the second embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the bottom structure of the upper mold base of the present invention.

[0030] Figure 10 This is a schematic diagram of the front cross-sectional structure of the first stamping machine of the present invention.

[0031] Figure 11 This is a schematic diagram of the bottom structure of the carrier plate adjusting machine of the present invention.

[0032] Figure 12 This is a schematic diagram of the cross-sectional structure of the fixing block of the present invention.

[0033] Figure 13 This is a schematic diagram of the drive shaft structure of the present invention.

[0034] Figure 14 This is a schematic diagram of the overall steel plate stamping die of the present invention.

[0035] Figure 15 This is a schematic diagram of the stamping structure of the present invention.

[0036] Labels in the diagram: 1. Steel plate support frame; 2. Leveling machine; 3. First stamping press; 4. Servo feeder; 5. Second stamping press; 6. Upper die base; 7. Lower die base; 8. Carrier plate; 9. Carrier plate adjusting machine; 901. Grooved wheel; 902. Dial; 903. First gear; 904. Second gear; 905. Drive shaft; 906. First guide groove; 907. Second guide groove; 908. Third guide groove; 909. Connecting pin; 910. Fixing block; 911. Spring; 10. Material pick-up port; 11. Fixing frame; 12. Scrap restraint; 1201. Upper... 1202. Pressure roller; 13. Lower pressure roller; 14. Coil take-up frame; 15. Carrier plate; 16. First support; 17. First slide table; 18. Tray; 19. First electromagnetic chuck; 20. Slide rail; 21. Fixed platform; 22. Second support; 23. Second slide table; 24. Circulation device; 25. Second electromagnetic chuck; 26. Drop bar; 27. First drop hole; 28. Second punch; 29. ​​Second drop hole; 30. Drain hole; 31. Waste pool; 32. Leveling roller; 33. First pulley; 34. Second pulley; 35. Belt. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example 1

[0038] Please see the appendix Figure 1-15 This embodiment discloses a device for eliminating the difference between the rotor blades and the plate: it includes a steel coil support frame. Along the side of the steel coil support frame during the stamping process of the steel plate, a leveling machine 2, a first stamping machine 3, a servo feeder 4, and a second stamping machine 5 are sequentially fixedly connected. The first stamping machine 3 and the second stamping machine 5 each include a power unit, an upper die base 6, a lower die base 7, a carrier plate 8, and an angle adjuster. The upper die base 6 is located below the power unit, the carrier plate 8 is located at the bottom of the upper die base 6, and the angle adjuster is located inside the upper die base 6. The first stamping machine 3 and the second stamping machine 5 complete the stamping process by vertically moving the upper die base 6 relative to the lower die base 7. The second stamping machine 5 has a material take-up port 10 on its side. A fixed frame 11 is provided below the material take-up port 10. A scrap restrainer 12 is provided on the fixed frame 11. A steel plate winding frame is fixedly connected to the side of the fixed frame 11.

[0039] The steel coil support frame mainly consists of a base, a limiting device, a fastening device, and cushioning material. The base serves as a fixed foundation for supporting and securing the steel coil. The limiting device restricts the position of the steel coil on the fixed frame 11, preventing it from rolling or moving. The fastening device securely fixes the steel coil to the fixed frame 11. The cushioning material is used at the contact points between the steel coil and the fixed frame 11 to reduce friction and prevent scratches. The upper planes of the leveling machine 2 and the servo feeder 4 are at the same horizontal level as the lower die base 7 of the first and second stamping machines 3 and 5, ensuring the stability of the steel plate during stamping. The power unit mainly consists of a motor, a reducer, and a crank mechanism. The motor provides power, and the reducer converts the high-speed rotation of the motor into the low-speed, high-torque output required by the stamping machine. The crank mechanism and the upper die base 6 work together to rotate the motor. The motion is converted into the reciprocating linear motion of the slider, thereby realizing the stamping process of metal materials. The leveling machine 2 and the servo feeder 4 are equipped with displacement sensors. When the displacement sensor detects that the length of the sheet material movement is slightly greater than the diameter of the sheet material to be cut, the movement of the sheet material is stopped. When the first stamping machine 3 and the second stamping machine 5 detect that the sheet material has stopped moving, the power unit on the first stamping machine 3 and the second stamping machine 5 pushes the upper die seat 6 on the first stamping machine 3 and the second stamping machine 5 to move downward. The crank mechanism drives the upper die seat 6 to feed vertically. The upper die seat 6 and the lower die seat 7 squeeze and punch the sheet material. The fixed frame 11 is equipped with two sets of upper pressure rollers 1201 and lower pressure rollers 1202. The distance between the upper pressure rollers 1201 and the lower pressure rollers 1202 is just enough to meet the thickness of the sheet material, so as to avoid the swaying of the sheet material during the movement and to avoid the waste sheet material affecting the material picking.

[0040] The angle adjuster includes a grooved wheel 901, a dial 902, a first gear 903, a second gear 904, and a drive shaft 905. The grooved wheel 901 is fixedly connected to the carrier plate 8. The dial 902 is fitted onto one side of the grooved wheel 901. The first gear 903 is fixedly connected to the dial 902. The first gear 903 and the second gear 904 mesh. The second gear 904 is fixedly connected to the drive shaft 905. The drive shaft 905 is provided with a first guide groove 906, a second guide groove 907, and a third guide groove 908. The first guide groove 906 spirals around the drive shaft 905. The second guide groove 907 vertically connects the first and second ends of the first guide groove 906. The lower end of the second guide groove 907 has a greater depth than the lower end of the first guide groove 906. The upper end of the second guide groove 907 has a less than the upper end of the first guide groove 906. The third guide groove 908 is connected to the second guide groove 907. The depth of the third guide groove 908 is greater than the upper end of the first guide groove 906. A connecting pin 909 is slidably connected to the first guide groove 906, the second guide groove 907, and the third guide groove 908. A fixing block 910 is slidably connected to the connecting pin 909. A spring 911 is provided between the fixing block 910 and the connecting pin 909 to exert force outward on the connecting pin 909. The fixing block 910 is fixedly connected to the first stamping machine 3 or the second stamping machine 5.

[0041] Because steel plates will have dimensional differences on different sides during production, when the punching position remains fixed, stacking thousands of punched sheets together will amplify these dimensional differences exponentially. This device incorporates angle adjusters on the upper die holders 6 of the first and second punching machines 3 and 5. These angle adjusters allow for changes in the angle of each punching operation. Figure 10-13As shown, the drive shaft 905, the first gear 903, the second gear 904, the dial 902, and the grooved wheel 901 are all located on the upper die holder 6. During the stamping process, when the upper die holder 6 moves downward, it drives the drive shaft 905 downward. The fixing block 910 and the connecting pin 909 on one side of the drive shaft 905 move upward relative to the drive shaft 905. Since the connecting pin 909 is located at the end of the second guide groove 907 at this time, and the groove depth of the lower end of the second guide groove 907 is greater than the groove depth of the lower end of the first guide groove 906, the connecting pin 909 moves directly along the second guide groove 907. The die moves vertically into the third guide groove 908. At this time, the drive shaft 905 will not rotate. The carrier plate 8 on the upper die holder 6 punches the sheet metal downwards while remaining stationary. During the return stroke of the upper die holder 6, the connecting pin 909 first moves vertically along the third guide groove 908. After the first punch 26 disengages from the steel plate, the connecting pin 909 moves to the upper end of the third guide groove. The depth of the third guide groove 908 is greater than the depth of the second guide groove 907. Under the action of the step in the second guide groove 907, the connecting pin 909 enters the first guide groove 906. Under the limiting position of connecting pin 909, drive shaft 905 rotates during vertical movement. The rotation of drive shaft 905 drives second gear 904 to rotate, which in turn drives dial 902 to rotate. First gear 903 and second gear 904 have the same module. Each rotation of drive shaft 905 causes first gear 903 to drive dial 902 to rotate one full turn. After one full rotation, dial 902 drives grooved wheel 901 to rotate one groove, thus rotating carrier plate 8 by a certain angle, causing the first... Punch 26 and punch 28 are adjusted to the corresponding angles to prevent the positioning holes of the die from being located in the same position on the sheet metal. The structure of the upper die holder 6 inside the second press 5 is the same as that of the upper die holder 6 on the first press 3. This ensures that after the positioning hole angle changes, the corresponding groove on the third punch can also correspond to the positioning hole on the die-cast part. The carrier plate 8 at the lower end of the upper die holder 6 is the carrier of the first punch 26 and punch 28. During the die-casting process, it prevents damage to the internal components of the upper die holder 6 caused by the reverse action of the sheet metal. The carrier plate 8 is used to withstand the impact force.

[0042] A fixed platform 20 is provided on the upper side of the fixed frame 11. The fixed platform 20 is stably fixed on the fixed frame 11. The material picking port 10 can be selected for manual picking or picking by a material picker. The material picker consists of a first bracket 15, a first slide 16, a tray 17 and a first electromagnetic chuck 18. After the second stamping machine 5 is completed, the carrier plate 8 on the second stamping machine 5 rises. At the same time, the first slide 16 drives the tray 17 and the first electromagnetic chuck 18 to move towards the second stamping machine 5. When it moves to the middle of the plate, the first electromagnetic chuck 18 is energized. The plate is fixed on the first electromagnetic chuck 18 by magnetic attraction. Then the first slide 16 performs a return motion. When it moves above the carrier plate 14, the first electromagnetic chuck 18 is de-energized and the plate falls onto the carrier plate 14. Example 2

[0043] The structure is the same as that of the above embodiments, such as Figure 8 As shown, the specific difference in this embodiment is that, in order to further improve the efficiency and automation of material handling, the material handler consists of a second support 21, a second slide 22, a circulation device 23, and multiple second electromagnetic chucks 24. The circulation device 23 can drive the second electromagnetic chucks 24 to rotate cyclically on the second slide 22. The initial position of the slide can be close to the second press 5, and then the circulation device 23 moves the material handler to a position farther away from the second press 5, thereby improving the overall efficiency.

[0044] The discharge bar 25 is smaller than the diameter of the first punch 26. The through hole in the middle of the material plate passes through the discharge bar 25 and is placed on the carrier plate 14 to facilitate the subsequent transfer of the material.

[0045] The first punch 26 has three protrusions on its side. The slot and the dial 902 are located in the 120-degree gap mechanism. There is one first blanking hole 27 and three second blanking holes 29. The three second blanking holes 29 are distributed at equal angles around the first blanking hole 27. When the first punching machine 3 is punching, the waste punched out by the first punch 26 and the second punch 28 falls into the drain hole 30 through the first blanking hole 27 and the second blanking hole 29. In order to facilitate the fall of waste, the first blanking hole 27 and the second blanking hole 29 are provided with a frustum structure drain hole 30 on the lower side. The waste falls into the waste pool 31 through the drain hole 30. The waste pool 31 is provided with a conveyor belt to transport the waste to the waste bin for processing.

[0046] The synchronization mechanism ensures that the leveling machine 2 and the lower pressure roller 1202 move synchronously, avoiding inconsistent speeds of the steel plate moving back and forth, and ensuring the smooth movement of the steel plate.

[0047] The overall workflow of this invention is as follows: Bundled steel coils are fixed on a steel coil support frame. After unwinding the coils, one side of the steel plate is straightened and flattened by a leveling machine 2. The flattened steel coils are then fed onto a first stamping press 3. A servo feeder 4 on the side of the first stamping press 3 pulls the steel plate to move. The servo feeder 4 stops after moving a certain distance. At this time, the power unit on the first stamping press performs the first punching operation on the steel plate through the upper die holder 6. The punching waste falls into the waste pool 31 through the first discharge hole 27 and the second discharge hole 29. Then, during the return stroke of the upper die holder 6, the angle adjuster drives the carrier plate 8 on the upper die holder 6 to rotate at an angle, while simultaneously passing through... The steel plate from the first process enters the second stamping press under the drive of the servo feeder 4. When it is detected that the center of the through hole opened in the first process of the steel plate is aligned with the center of the carrier plate 8 on the second stamping press 5, the upper die holder 6 on the second stamping press 5 falls to perform the second process of punching on the steel plate. After punching, when the upper die holder 6 rises, the carrier plate 8 on the second stamping press 5 will also rotate at the same angle as the carrier plate 8 on the first stamping press 3 under the action of the angle adjuster, so as to ensure that the inner hole of the punching die corresponds to the groove on the side of the punching die. The punched plate is taken out through the feeding port 10. Afterwards, the waste plate is wound up by the steel coil winding rack 13 through the fixing frame 11.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for eliminating the difference in the same plate between rotor blades of an electric motor, characterized in that: The system includes a steel coil support frame. Along the side of the steel coil support frame, a leveling machine (2), a first stamping machine (3), a servo feeder (4), and a second stamping machine (5) are fixedly connected in sequence. The first stamping machine (3) and the second stamping machine (5) each include a power unit, an upper die holder (6), a lower die holder (7), a carrier plate (8), and an angle adjuster. The upper die holder (6) is located below the power unit, the carrier plate (8) is located at the bottom of the upper die holder (6), and the angle adjuster is located inside the upper die holder (6). The first stamping machine (3) and the second stamping machine (5) complete the stamping process by vertically moving the upper die holder (6) relative to the lower die holder (7). The second stamping machine (5) has a material take-up port (10) on its side. A fixed frame (11) is provided on the lower side of the material take-up port (10). A scrap restrainer (12) is provided on the fixed frame (11). A steel coil take-up frame (13) is fixedly connected to the side of the fixed frame (11). The angle adjuster includes a grooved wheel (901), a dial (902), a first gear (903), a second gear (904), and a drive shaft (905). The grooved wheel (901) is fixedly connected to the carrier plate (8). The dial (902) is fitted on one side of the grooved wheel (901). The first gear (903) is fixedly connected to the dial (902). The first gear (903) meshes with the second gear (904). The second gear (904) is fixedly connected to the drive shaft (905). The drive shaft (905) is provided with a first guide groove (906), a second guide groove (907), and a third guide groove (908). The first guide groove (906) rotates around the drive shaft along a spiral line. Around the shaft (905), the second guide groove (907) is vertically connected to the beginning and end of the first guide groove (906). The depth of the lower end of the second guide groove (907) is greater than the depth of the lower end of the first guide groove (906), and the depth of the upper end of the second guide groove (907) is less than the depth of the upper end of the first guide groove (906). The third guide groove (908) communicates with the second guide groove (907), and the depth of the third guide groove (908) is greater than the depth of the upper end of the first guide groove (906). A connecting pin (909) is slidably connected within the first guide groove (906), the second guide groove (907), and the third guide groove (908). The connecting pin (909) is slidably connected to a fixing block. 910), a spring (911) is provided between the fixing block (910) and the connecting pin (909) to exert force on the connecting pin (909) outward, and the fixing block (910) is fixedly connected to the first stamping machine (3) or the second stamping machine (5); The waste restraint (12) includes an upper pressure roller (1201) and a lower pressure roller (1202), the distance between the upper pressure roller (1201) and the lower pressure roller (1202) is equal to the thickness of the steel coil, and both the upper pressure roller (1201) and the lower pressure roller (1202) are rotatably connected to the fixed frame (11); The lower side of each of the carrier plates (8) is fixedly connected to a punch head. The bottom of the carrier plate (8) of the first punching machine (3) is fixedly connected to a first punch (26). A second punch (28) is provided on the side of the first punch (26). A first blanking hole (27) is provided on the lower side of the first punch (26). A number of second blanking holes (29) are provided on the lower die base (7) below the second punch (28). The number of second blanking holes (29) corresponds to the number of grooves of the grooved wheel (901). The first blanking hole (27) and the second blanking hole (29) are located on the lower die base (7) of the first punching machine (3). The first discharge hole (27) and the second discharge hole (29) are provided with a drain hole (30) on the lower side. The drain hole (30) is a frustum structure. A waste pool (31) is provided below the drain hole (30).

2. The device for eliminating the difference in the same plate of motor rotor laminations according to claim 1, characterized in that: The fixed frame (11) and the upper side of the steel coil winding frame are provided with a material picker. The material picker component of the material picker is higher than the material picker opening (10). The material picker is fitted with a material carrier plate (14) below it.

3. The device for eliminating the difference in the same plate of motor rotor laminations according to claim 2, characterized in that: The material handling device includes a first support (15), a first slide (16), a tray (17) and a first electromagnetic chuck (18). The first support (15) is provided with a slide rail (19) for the first slide (16) to slide. The first slide (16) is fixedly connected to the tray (17). The lower side of the tray (17) is fixedly connected to the first electromagnetic chuck (18). The material carrier plate (14) is slidably connected to a fixed platform (20). The fixed platform (20) is fixedly connected to the fixed frame (11).

4. The device for eliminating the difference in the same plate of motor rotor laminations according to claim 2, characterized in that: The feeder includes a second support (21), a second slide (22), a circulation device (23), and a plurality of second electromagnetic chucks (24). The second slide (22) is slidably connected to the second support (21). The circulation device (23) is installed on the second slide (22), and the second electromagnetic chucks (24) are fixedly installed on the circulation device (23) at equal intervals.

5. The device for eliminating the difference in the same plate of motor rotor laminations according to claim 2, characterized in that: A material drop bar (25) is fixedly connected to the middle of the material carrier plate (14).

6. The device for eliminating the difference in the same plate of motor rotor laminations according to claim 1, characterized in that: The leveling machine (2) is rotatably connected to a leveling roller (32). A synchronization mechanism is provided between the leveling roller (32) and the lower pressure roller (1202). The synchronization mechanism includes a first pulley (33), a second pulley (34), and a belt (35). The first pulley (33) is fixedly connected to the leveling roller (32), the second pulley (34) is fixedly connected to the lower pressure roller (1202), and the belt (35) is installed on the first pulley (33) and the second pulley (34).

7. The method of using the device for eliminating the inconsistency between rotor blades on the same plate as described in claim 1, characterized in that: Bundles of steel coils are fixed to a steel coil support frame. After unwinding the coils, one side of the coil is straightened and flattened using a leveling machine (2). The flattened coils are then fed into the first stamping machine (3). A servo feeder (4) on the side of the first stamping machine (3) pulls the coils to move. The servo feeder (4) stops after moving a certain distance. At this time, the power unit on the first stamping machine punches the coils in the first process through the upper die holder (6). The punching waste falls into the waste pool (31) through the first drop hole (27) and the second drop hole (29). Then, during the return stroke of the upper die holder (6), the angle adjuster drives the carrier plate (8) on the upper die holder (6) to rotate. At the same time, the steel coils that have undergone the first process are... Driven by the servo feeder (4), the steel coil enters the second stamping machine. When the center of the through hole opened in the first process is detected to be aligned with the center of the upper plate (8) of the second stamping machine (5), the upper die holder (6) on the second stamping machine (5) falls to perform the second process of punching on the steel coil. After punching, when the upper die holder (6) rises, the plate (8) on the second stamping machine (5) will also rotate at the same angle as the plate (8) on the first stamping machine (3) under the action of the angle adjuster, so as to ensure that the inner hole of the punching die corresponds to the groove on the side of the punching die. The punched plate is taken out through the feeding port (10), and then the waste plate is wound up by the steel coil winding rack (13) through the fixing frame (11).

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