3D bending mechanism for hairpin flat wire

Abstract

A 3D bending mechanism for a hairpin flat wire, comprising a base (1). A loading and unloading assembly (2), a die switching assembly (3), and a stamping assembly (4) are provided on the base (1). The die switching assembly (3) comprises a rotating disc (31) arranged on the base (1), a first driving member (32) arranged on the base (1), and multiple stamping dies (33) arranged on the rotating disc (31). An operating station is located below the stamping assembly (4); the loading and unloading assembly (2) first sends a 3D flat wire out of the stamping die (33) at the operating station, then sends a 2D flat wire into the stamping die (33) at the operating station; and the stamping assembly (4) acts on the stamping die (33) at the operating station and stamps the 2D flat wire into a 3D flat wire.

Description

A hairpin-type flat wire 3D bending mechanism

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 2, 2023, with application number 202311127924.3, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of motor manufacturing technology, for example, to a hairpin-type flat wire 3D bending mechanism. Background Art

[0003] The difference between flat wire motors and round wire motors lies in the way the copper wire is formed. Flat wire is conducive to improving the slot fill rate of the motor. Increasing the slot fill rate means that more copper wire can be filled in while keeping the space unchanged, generating a stronger magnetic field strength, increasing the power density, and thus improving the performance of the motor.

[0004] Currently, the coils used in flat wire motors are all U-shaped hairpin-style three-dimensional (3D) flat wires. During production, a straight flat wire is first bent into a flat U-shaped hairpin-style flat wire using a bending mechanism. The flat U-shaped hairpin-style flat wire consists of a bent portion 101 and two straight portions 102. The two straight portions 102 are parallel to each other and located at either end of the bent portion 101. The bent portion 101 of the flat U-shaped hairpin-style flat wire is then stamped using a stamping mechanism to produce the U-shaped hairpin-style 3D flat wire.

[0005] The 3D flat wires required for flat wire motors of different specifications are also different. The sizes and bending angles of different 3D flat wires are also different. When the stamping mechanism stamps different 3D flat wires, different stamping dies need to be manually replaced, which leads to low production efficiency of 3D flat wires.

[0006] Summary of the Invention

[0007] In order to improve the production efficiency of 3D flat wires, the present application provides a hairpin-type flat wire 3D bending mechanism.

[0008] The present application provides a hairpin-type flat wire 3D bending mechanism that adopts the following technical solutions:

[0009] A hairpin-type flat wire 3D bending mechanism includes a base, on which are provided a loading and unloading assembly, a mold switching assembly and a stamping assembly. The mold switching assembly includes a turntable, a first driving member and a plurality of stamping dies. The turntable is rotatably arranged on the base, and the plurality of stamping dies are arranged on the turntable at intervals. The first driving member is arranged on the base and drives the turntable to rotate. Below the stamping assembly is an operating station. The loading and unloading assembly first sends the processed 3D flat wire out of the stamping die of the operating station, and then sends the unprocessed 2D flat wire into the stamping die of the operating station. The stamping assembly acts on the stamping die of the operating station and punches the 2D flat wire into a 3D flat wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a schematic structural diagram of a flat U-shaped hairpin flat wire in the background art of this application;

[0011] FIG2 is a schematic diagram of the overall structure of the hairpin-type flat wire 3D bending mechanism of the present application;

[0012] FIG3 is a schematic diagram of a portion of the structure of the hairpin-type flat wire 3D bending mechanism of the present invention, highlighting the mold switching component;

[0013] FIG4 is a schematic diagram of a portion of the structure of the hairpin-type flat wire 3D bending mechanism of the present invention, highlighting the stamping assembly and the loading and unloading assembly;

[0014] FIG5 is an enlarged schematic diagram of point A in FIG3 of the present application;

[0015] FIG6 is an enlarged schematic diagram of point B in FIG3 of the present application;

[0016] FIG7 is a schematic diagram of a portion of the structure of the hairpin-type flat wire 3D bending mechanism of the present invention, highlighting the limit plate;

[0017] Explanation of reference numerals: 1. base; 2. loading and unloading assembly; 21. horizontal moving part; 22. feeding clamping part; 221. first lifting member; 222. first lifting plate; 223. first clamping member; 224. receiving plate; 23. discharging clamping part; 231. second lifting member; 232. second lifting plate; 233. second clamping member; 234. horizontal moving part; 235. third clamping member; 3. mold switching assembly; 31. turntable; 32. first driving member ; 33. Stamping die; 331. Fixed die; 332. Moving die; 4. Stamping assembly; 41. Fixed seat; 42. Third lifting member; 43. Punching head; 5. First movable plate; 6. Second movable plate; 7. Support block; 8. Support rod; 9. Support plate; 10. Limiting plate; 11. Connecting rod; 12. Pressure rod; 13. Mounting block; 14. Lifting rod; 15. Elastic member; 16. Connecting plate; 17. Column; 18. Optical axis fixing ring; 19. Limiting member; 20. Fixed disk. DETAILED DESCRIPTION

[0018] The present application is described in detail below with reference to Figures 2-7.

[0019] The embodiment of the present application discloses a hairpin-type flat wire 3D bending mechanism.

[0020] 2 , a hairpin-type flat wire 3D bending mechanism includes a base 1 , on which are mounted loading and unloading components 2 , a mold switching component 3 and a punching component 4 , and below the punching component 4 is an operating station.

[0021] 2 and 3 , illustratively, the mold switching assembly 3 includes a turntable 31, a first drive member 32 and four stamping dies 33. The number of stamping dies 33 is not limited to 4, and can also be a plurality of stamping dies of other numbers. The first drive member 32 is fixedly mounted on the base 1, the turntable 31 is fixedly mounted on the driving end of the first drive member 32, and the turntable 31 is rotatably set on the base 1, and the four stamping dies 33 are fixedly mounted on the turntable 31 at equal intervals along the circumference of the turntable 31. In the present application, the first drive member 32 can be selected as a motor and a reducer, the driving end of the motor is fixedly connected to the input end of the reducer, and the output end of the reducer is fixedly connected to the turntable 31, thereby driving the turntable 31 to drive the four stamping dies 33 to be replaced at the work station. The loading and unloading assembly 2 first sends the processed 3D flat wire out of the stamping die 33 of the working station, and then sends the unprocessed two-dimensional (2D) flat wire into the stamping die 33 of the working station. The stamping assembly 4 acts on the stamping die 33 of the working station and punches the 2D flat wire into a 3D flat wire.

[0022] By adopting the above technical solution, the loading and unloading assembly transports the 2D flat wire to the stamping die on the work station, and the stamping assembly acts on the stamping die to stamp the 2D flat wire in the stamping die into a 3D flat wire. After the stamping is completed, the stamping assembly moves and resets. The loading and unloading assembly will first move the processed 3D flat wire out of the stamping die, and then transport the unprocessed 2D flat wire into the stamping die. Repeating the above steps can realize the automatic production of 3D flat wire. When different 3D flat wires need to be stamped, the first driving member drives the turntable to rotate, and the turntable drives multiple stamping dies to rotate, so that the stamping dies on the work station can be quickly replaced, and the stamping dies do not need to be manually replaced, thereby improving the production efficiency of 3D flat wire.

[0023] Exemplarily, the stamping die 33 includes a fixed die 331 and a movable die 332. The fixed die 331 is mounted on the turntable 31, and the movable die 332 is slidably mounted on the fixed die 331 in the vertical direction. Support rods 8 are fixedly mounted vertically at the four corners of the bottom end of the fixed die 331. The four support rods 8 slide through the turntable 31, and support plates 9 are fixedly mounted at the bottom ends of the four support rods 8. A support block 7 is fixedly mounted vertically on the base 1, and the support plate 9 at the bottom end of the fixed die 331 at the working station abuts against the top wall of the support block 7.

[0024] The 2D flat wire is transported between the movable die 332 and the fixed die 331. The stamping assembly 4 presses the movable die 332 toward the fixed die 331, and the movable die 332 and the fixed die 331 punch the 2D flat wire into a 3D flat wire. The support block 7 supports the fixed die 331 via the support plate 9 and support rod 8, making the stamping die 33 more stable during the stamping process, thereby ensuring more precise dimensions of the 3D flat wire formed by the stamping.

[0025] A fixed plate 20 coaxial with the turntable 31 is fixedly mounted on the base 1 through a vertical rod. The fixed plate 20 is located below the turntable 31, and the support block 7 passes through the fixed plate 20. The fixed plate 20 supports the support plate 9 below the fixed die 331 at the non-operating station, making the stamping die 33 at the non-operating station more stable.

[0026] 2 and 4 , illustratively, the stamping assembly 4 includes a fixed base 41, a third lifting member 42, and a stamping head 43. The fixed base 41 is fixedly mounted on the base 1 and is C-shaped, with the open end of the fixed base 41 facing the mold switching assembly 3. The third lifting member 42 is fixedly mounted on the top of the fixed base 41, and the stamping head 43 is fixedly mounted on the lifting end of the third lifting member 42. In the present application, the third lifting member 42 can be optionally used as a hydraulic cylinder, which drives the stamping head 43 to move back and forth in the vertical direction, and the working station is directly below the stamping head 43.

[0027] By adopting the above technical solution, the third lifting member on the fixed seat drives the punching head to move up and down, and the punching head descends and squeezes the punching die, so that the 2D flat wire in the punching die can be punched into a 3D flat wire.

[0028] Referring to Figure 4 , the loading and unloading assembly 2 includes a horizontal moving portion 21, a feed clamping portion 22, and a discharge clamping portion 23. The horizontal moving portion 21 is horizontally mounted above the base 1 via multiple columns 17 and is located within the open end of the fixed seat 41. The upstream end of the horizontal moving portion 21 serves as the 2D flat wire feed port, while the downstream end serves as the 3D flat wire discharge port. In this application, the horizontal moving portion 21 can be configured as a linear module and has two moving ends.

[0029] Referring to Figures 4, 5 and 6, a first movable plate 5 is fixedly mounted on the movable end of the horizontal movable portion 21 close to the 2D flat wire feeding end, and the feed clamping portion 22 is mounted on the first movable plate 5 and clamps the 2D flat wire; a second movable plate 6 is fixedly mounted on the movable end of the horizontal movable portion 21 close to the 3D flat wire discharging end, and the discharging clamping portion 23 is mounted on the second movable plate 6 and clamps the 3D flat wire.

[0030] 2 and 4 , when the 2D flat wire is stamped, the feed clamping portion 22 first clamps the 2D flat wire at the feed end of the 2D flat wire, and the horizontal moving portion 21 drives the feed clamping portion 22 to move to the working station. The feed clamping portion 22 places the 2D flat wire in the stamping die 33 at the working station, and the horizontal moving portion 21 then drives the feed clamping portion 22 to move and reset, thereby completing the automatic loading of the 2D flat wire.

[0031] By adopting the above technical solution, when the 3D flat wire is completed by stamping, the discharge clamping part clamps the 3D flat wire, and one horizontal moving end of the horizontal moving part drives the second moving plate to move, and the second moving plate drives the discharge clamping part to move and move the 3D flat wire out of the stamping die, and the discharge clamping part then releases the clamping of the 3D flat wire, so that the 3D flat wire enters the next processing flow, and the horizontal moving part then drives the discharge clamping part to move and reset, so that the 3D flat wire that has completed stamping can be automatically unloaded; when the 3D flat wire is completed by unloading, the feed clamping part clamps the unprocessed 2D flat wire, and the other horizontal moving end of the horizontal moving part drives the first moving plate to move, and the first moving plate drives the feed clamping part to move to the stamping die of the work station, and the feed clamping part releases the clamping again, so that the unprocessed 2D flat wire enters the stamping die, and the horizontal moving part then drives the feed clamping part to move and reset, so that the unprocessed 2D flat wire can be automatically loaded.

[0032] The third lifting member 42 drives the punch head 43 downward. The punch head 43 acts on the punch die 33 at the work station and punches the 2D flat wire into a 3D flat wire. The discharge clamping portion 23 clamps the 3D flat wire. The horizontal moving portion 21 drives the discharge clamping portion 23 to move to the 3D flat wire discharge end. The discharge clamping portion 23 places the 3D flat wire at the discharge end. The horizontal moving portion 21 then drives the discharge clamping portion 23 to move back to its original position, completing the automatic unloading of the 3D flat wire. Repeating these steps can achieve automatic production of 3D flat wire.

[0033] 2 and 3 , when different 3D flat wires need to be stamped, the first driving member 32 drives the turntable 31 to rotate, and the turntable 31 drives the four stamping dies 33 to rotate, so that the stamping dies 33 at the work station can be quickly switched, and the stamping dies 33 do not need to be manually replaced, thereby improving the production efficiency of the 3D flat wire.

[0034] 4 and 5 , illustratively, the feed clamping portion 22 includes a first lifting member 221, a first lifting plate 222, a first clamping member 223, and a receiving plate 224. The first lifting member 221 is fixedly mounted on the side wall of the first movable plate 5 away from the horizontal movable portion 21, and the first lifting plate 222 is fixedly mounted horizontally on the lifting end of the first lifting member 221. The first clamping member 223 is fixedly mounted on the top wall of the first lifting plate 222, and the receiving plate 224 is fixedly mounted vertically on the side wall of the first clamping member 223, with the top wall of the receiving plate 224 being flush with the clamping end of the first clamping member 223. In the present application, the first lifting member 221 can be optionally a cylinder, and the first clamping member 223 can be optionally a two-finger clamp.

[0035] When the feed clamping unit 22 needs to clamp and load the 2D flat wire, the first lifting member 221 drives the first clamping member 223 and the receiving plate 224 to rise together via the first lifting plate 222. The first clamping member clamps one straight portion of the 2D flat wire, and the receiving plate 224 is set on the first lifting plate 222 and receives the other straight portion of the 2D flat wire, thereby stably loading and transporting the 2D flat wire. When the 2D flat wire is transported into the stamping die 33, the first clamping member releases the clamping member, and the first lifting member 221 drives the first clamping member 223 and the receiving plate 224 to descend together via the first lifting plate 222, allowing the 2D flat wire to enter the stamping die 33. When different 2D flat wires need to be loaded and transported, the receiving plate 224 can receive the straight portions of 2D flat wires of different sizes, thereby enabling the feed clamping unit 22 to clamp, load and transport different 2D flat wires.

[0036] By adopting the above technical solution, when the upstream conveying mechanism transports the 2D flat wire to the bending mechanism, the first lifting member drives the first clamping portion and the receiving plate to rise together via the first lifting plate. After the first clamping portion rises, it clamps one straight portion of the 2D flat wire. After the receiving plate rises, it receives the other straight portion of the 2D flat wire, thereby clamping and positioning the 2D flat wire. The horizontal moving portion transports the 2D flat wire into the stamping die via the feed clamping portion. The first lifting member drives the first clamping portion and the receiving plate to descend together via the first lifting plate. At the same time, the first clamping portion releases its grip on the straight portion of the 2D flat wire, allowing the 2D flat wire to be placed into the stamping die. In this arrangement, the first clamping portion and the receiving plate are used to clamp and receive the two straight portions of the 2D flat wire, allowing the feed clamping portion to clamp and load different 2D flat wires.

[0037] 4 and 6 , the discharge clamping unit 23 includes a second lifting member 231, a second lifting plate 232, a second clamping member 233, a horizontal moving member 234, and a third clamping member 235. The second lifting member 231 is fixedly mounted on the side wall of the second moving plate 6 away from the horizontal moving member 21, and the second lifting plate 232 is fixedly mounted at the lifting end of the second lifting member 231. The second clamping member 233 is fixedly mounted on the second lifting plate 232 via a connecting plate 16 and clamps one straight portion of the 3D flat wire. The horizontal moving member 234 is fixedly mounted on the second lifting plate 232. The third clamping member 235 is fixedly mounted on the horizontal moving end of the horizontal moving member 234 and clamps the other straight portion of the 3D flat wire. The clamping ends of the second clamping member 233 and the third clamping member 235 are flush. In the present application, the second lifting member 231 can be selected as a cylinder, the horizontal moving part 21 can be selected as a servo electric cylinder, and the second clamping member 233 and the third clamping member 235 can both be selected as two-finger clamps.

[0038] After the 3D flat wire is stamped, the second lifting member 231 drives the second clamping member 233 and the third clamping member 235 upwards via the second lifting plate 232. The second clamping member 233 and the third clamping member 235 respectively clamp the two straight portions of the 3D flat wire, thereby removing the 3D flat wire from the stamping die 33. When the 3D flat wire moves to the 3D flat wire discharge end, the second lifting member 231 drives the second clamping member 233 and the third clamping member 235 downwards via the second lifting plate 232. Simultaneously, the second clamping member 233 and the third clamping member 235 release their grip, allowing the 3D flat wire to be delivered to the discharge end. When different 3D flat wires need to be unloaded and transported, the horizontal moving member 234 drives the third clamping member 235 toward or away from the second clamping member 233, allowing the discharge clamping member 23 to clamp and unload different 3D flat wires.

[0039] By adopting the above technical solution, when the 3D flat wire is stamped, the second lifting member drives the second lifting plate to move, and the second lifting plate drives the second clamping member and the third clamping member to rise together and clamp the two straight parts of the 3D flat wire. The second movable plate then drives the discharge clamping member to move to the blanking station. After the second clamping member and the third clamping member are released, the second lifting member drives the second clamping member and the third clamping member to descend together, so that the 3D flat wire enters the blanking station. The second movable plate drives the second clamping member and the third clamping member to move and reset, thereby realizing the customized blanking of the 3D flat wire. When different 3D flat wires need to be clamped and blanked, the horizontal moving member drives the third clamping member to move horizontally, adjusts the distance between the third clamping member and the second clamping member, so that the discharge clamping member can clamp and blank different 3D flat wires.

[0040] The loading and unloading assembly 2 is located at the working station and a limit plate 10 is provided for lifting. The two straight portions of the 2D flat wire in the stamping die 33 abut against the top wall of the limit plate 10 .

[0041] By adopting this technical solution, when the stamping die is stamping the bent portion of the 2D flat wire, the two straight portions of the 2D flat wire are suspended in the air, which can easily cause dimensional deviation in the final 3D flat wire. During the stamping process, the limiting plate supports and limits the two straight portions of the flat wire, preventing them from falling or bending.

[0042] Referring to Figures 4 and 7 , a mounting block 13 with an L-shaped cross-section is fixedly mounted on the top wall of the horizontal movable portion 21, near the workstation. Two lifting rods 14 are vertically slidably mounted within the mounting block 13. The top ends of the lifting rods 14 are fixedly mounted to the limit plate 10. Elastic members 15 are sleeved over the lifting rods 14, with their ends respectively abutting the top wall of the mounting block 13 and the bottom wall of the limit plate 10. A limit member 19 is vertically fixedly mounted on the side wall of the mounting block 13. The driving end of the limit member 19 is fixedly connected to the bottom wall of the limit plate 10 via a plate.

[0043] By adopting the above technical solution, when the pressure rod pushes the limit plate down, the limit plate drives the lifting rod to move down in the mounting block. At the same time, the limit plate descends and squeezes the elastic part. When the stamping is completed, the punching head drives the pressure rod to move upward. At this time, the elastic part releases the elastic potential energy and pushes the limit plate to rise and reset, so that the limit plate can limit the next 2D flat wire again.

[0044] In the present application, the limit member 19 can be selected as a cylinder, a center-leakage solenoid valve and a sensor. When the limit plate 10 rises or falls, the center-leakage solenoid valve acts on the cylinder, so that the telescopic end of the cylinder can move freely with the limit plate 10; when stamping, the limit plate 10 descends together with the punching head 43 and triggers the sensor. The sensor controls the center-leakage solenoid valve to act on the cylinder, so that the cylinder contracts and pulls the limit plate 10.

[0045] A connecting rod 11 is fixedly mounted horizontally on the side wall of the punch head 43 near the limit plate 10. An optical axis fixing ring 18 is fixedly mounted on both the upper and lower walls of the connecting rod 11 away from the punch head 43. A pressure rod 12 is slidably mounted vertically within the connecting rod 11 and the two optical axis fixing rings 18, with the bottom end of the pressure rod 12 moving to abut the top wall of the limit plate 10. By turning a bolt in the optical axis fixing ring 18, the height of the pressure rod 12 can be adjusted within the connecting rod 11.

[0046] When the 2D flat wire is loaded and transported into the stamping die 33, the two straight portions of the 2D flat wire abut against the top wall of the limit plate 10. When the punch head 43 performs stamping, the connecting rod 11 drives the pressure rod 12 downward, and the pressure rod 12 pushes the limit plate 10 downward. During the stamping process, the two straight ends of the flat wire always abut against the top wall of the limit plate 10, so that when the bent portion of the flat wire is stamped, the two straight portions of the flat wire are less likely to fall and bend, thereby making the dimensions of the 3D flat wire formed by the stamping more accurate.

[0047] By adopting the above technical solution, during the stamping process, as the punching head continues to descend, the two straight parts of the flat wire will also descend and move during the flat wire stamping process. When the punching head descends, the pressure rod is driven to descend synchronously through the connecting rod. The pressure rod acts on the limit plate and pushes the limit plate to descend together with the two straight parts, so that the top wall of the limit plate always supports the two straight parts during the stamping process, thereby making the support and limiting effect of the limit plate better.

[0048] At the same time, the limit plate 10 descends to squeeze the elastic part 15. When the stamping is completed, the punching head 43 rises, and the limit member 19 pulls the limit plate 10 to remain stationary. The punching head 43 drives the pressure rod 12 to move upward. When the 3D flat wire is unloaded and transported out of the stamping die 33, the limit member 19 releases the limit on the limit plate 10. At this time, the elastic part 15 releases the elastic potential energy and pushes the limit plate 10 to rise and reset, so that the limit plate 10 can limit the next 2D flat wire again.

[0049] By adopting the above technical solution, when the punch head completes stamping the flat wire and rises to reset, the limiter first limits the limit plate, keeping the limit plate stationary. When the 3D flat wire is fed out of the stamping die, the limiter releases the limit plate, and the elastic member then pushes the limit plate to move and reset. This arrangement prevents the limit plate from immediately resetting after the punch head completes stamping, thereby reducing the possibility of the 3D flat wire being lifted due to the limit plate resetting.

[0050] The implementation principle of the embodiment of the present application is: when stamping the 2D flat wire, the feed clamping part 22 first clamps the 2D flat wire at the feeding end of the 2D flat wire, and the horizontal moving part 21 drives the feed clamping part 22 to move to the working station, and the feed clamping part 22 places the 2D flat wire in the stamping die 33 at the working station, and the horizontal moving part 21 then drives the feed clamping part 22 to move and reset, thereby completing the automatic loading of the 2D flat wire; the third lifting part 42 drives the punching head 43 to descend, and the punching head 43 acts on the stamping die 33 at the working station and punches the 2D flat wire into a 3D flat wire, and the discharge clamping part 23 clamps the 3D flat wire, and the horizontal moving part 21 drives the discharge clamping part 23 to move to the 3D flat wire discharge end, and the discharge clamping part 23 places the 3D flat wire at the discharge end, and the horizontal moving part 21 then drives the discharge clamping part 23 to move and reset, thereby completing the automatic unloading of the 3D flat wire. Repeating the above steps can achieve automatic production of 3D flat wires. When different 3D flat wires need to be stamped, the first driving member 32 drives the turntable 31 to rotate, and the turntable 31 drives the four stamping dies 33 to rotate, so that the stamping dies 33 at the work station can be quickly switched, eliminating the need for manual replacement of the stamping dies 33, thereby improving the production efficiency of 3D flat wires.

[0051] In summary, this application includes at least one of the following technical effects:

[0052] 1. By adopting the die switching assembly, when different 3D flat wires need to be stamped, the first driving member drives the turntable to rotate, and the turntable drives multiple stamping dies to rotate, so that the stamping dies on the work station can be quickly replaced, eliminating the need for manual replacement of the stamping dies, thereby improving the production efficiency of 3D flat wires;

[0053] 2. By using support blocks to support the fixed die, the fixed die is made more stable during the stamping process, thereby making the size of the 3D flat wire formed by stamping more accurate;

[0054] 3. The two straight parts of the flat wire are limited by the limiting plate, so that the two straight parts of the flat wire are not easy to fall and bend.

Claims

1. A hairpin-type flat wire 3D bending mechanism, comprising: A base (1) is provided with a loading and unloading assembly (2), a die switching assembly (3) and a punching assembly (4); the die switching assembly (3) comprises a turntable (31), a first driving member (32) and a plurality of punching dies (33); the turntable (31) is rotatably arranged on the base (1); the plurality of punching dies (33) are arranged on the turntable (31) at intervals and in a surrounding manner; the first driving member (32) is arranged on the base (1) and drives the turntable (31) to rotate; below the punching assembly (4) is an operating station; the loading and unloading assembly (2) first sends the processed three-dimensional 3D flat wire out of the punching die (33) of the operating station, and then sends the unprocessed 2D flat wire into the punching die (33) of the operating station; the punching assembly (4) acts on the punching die (33) of the operating station and punches the two-dimensional 2D flat wire into a 3D flat wire.

2. A hairpin-type flat wire 3D bending mechanism according to claim 1, wherein: The loading and unloading assembly (2) comprises a horizontal moving part (21), a feeding clamping part (22) and a discharging clamping part (23); the horizontal moving part (21) is arranged on a base (1); the horizontal moving part (21) is provided with two horizontal moving ends, and the two horizontal moving ends are respectively provided with a first moving plate (5) and a second moving plate (6); the feeding clamping part (22) is arranged on the first moving plate (5), and the discharging clamping part (23) is arranged on the second moving plate (6).

3. A hairpin-type flat wire 3D bending mechanism according to claim 2, wherein: The feed clamping part (22) comprises a first lifting member (221), a first lifting plate (222), a first clamping member (223) and a receiving plate (224); the first lifting member (221) is fixedly arranged on the first movable plate (5); the first lifting plate (222) is arranged at the lifting end of the first lifting member (221); the first clamping member (223) is arranged on the first lifting plate (222) and clamps a straight portion of the 2D flat wire; the receiving plate (224) is arranged on the first lifting plate (222) and receives another straight portion of the 2D flat wire.

4. A hairpin-type flat wire 3D bending mechanism according to claim 2, wherein: The discharging clamping part (23) comprises a second lifting member (231), a second lifting plate (232), a second clamping member (233), a horizontal moving member (234) and a third clamping member (235); the second lifting member (231) is fixedly arranged on the second moving plate (6); the second lifting plate (232) is arranged at the lifting end of the second lifting member (231); the second clamping member (233) is fixedly arranged on the second lifting plate (232) and clamps a straight line portion of the 3D flat wire; the horizontal moving member (234) is arranged on the second lifting plate (232); the third clamping member (235) is arranged at the moving end of the horizontal moving member (234) and clamps another straight line portion of the 3D flat wire.

5. A hairpin-type flat wire 3D bending mechanism according to claim 1, wherein: The punching assembly (4) comprises a fixed seat (41), a third lifting member (42) and a punching head (43); the fixed seat (41) is fixedly arranged on the base (1); the third lifting member (42) is arranged on the fixed seat (41); and the punching head (43) is arranged at the lifting end of the third lifting member (42) and is located directly above the punching die (33) of the working station.

6. A hairpin-type flat wire 3D bending mechanism according to claim 5, wherein: The stamping die (33) comprises a fixed die (331) and a movable die (332); the fixed die (331) is arranged on a rotating disk (31); the movable die (332) is slidably arranged on the fixed die (331); the base (1) is located at a working station and is provided with a support block (7) directly below the fixed die (331); the bottom end of the fixed die (331) is provided with a support rod (8) penetrating the rotating disk (31); the bottom end of the support rod (8) is provided with a support plate (9), and the support plate (9) abuts against the top wall of the support block (7).

7. A hairpin-type flat wire 3D bending mechanism according to claim 5, wherein: The loading and unloading assembly (2) is located at the working station and a limit plate (10) is provided for lifting and lowering, and two straight line portions of the 2D flat wire in the stamping die (33) abut against the top wall of the limit plate (10).

8. A hairpin-type flat wire 3D bending mechanism according to claim 7, wherein: A connecting rod (11) is provided on the side wall of the punching head (43), a pressing rod (12) is provided at one end of the connecting rod (11) away from the punching head (43), and the bottom end of the pressing rod (12) moves to abut against the top wall of the limiting plate (10).

9. A hairpin-type flat wire 3D bending mechanism according to claim 8, wherein: The loading and unloading assembly (2) is provided with a mounting block (13) near the working station, and a lifting rod (14) is provided in the mounting block (13) for lifting and sliding, and the top end of the lifting rod (14) is fixedly connected to the limit plate (10), and an elastic member (15) is provided on the lifting rod (14), and the two ends of the elastic member (15) respectively abut the limit plate (10) and the mounting block (13).

10. A hairpin-type flat wire 3D bending mechanism according to claim 9, wherein: A limiting member (19) is arranged on the side wall of the mounting block (13); a driving end of the limiting member (19) is fixedly connected to the limiting plate (10); when the punching head (43) rises, the limiting member (19) limits the limiting plate (10) and keeps the limiting plate (10) stationary; when the 3D flat wire is sent out of the punching die (33), the limiting member (19) releases the limiting of the limiting plate (10).

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