Automatic forming machine and method for U-shaped coil of transformer enameled wire

Abstract

The present invention provides an automatic forming machine and method for a transformer enameled wire U-shaped coil, wherein a feed guide structure for guiding the feed of copper wire raw materials is fixed on the front side wall of the main box, a traction power device for pulling the copper wire is arranged at the workstation after the feed guide structure, a discharging guide structure for guiding the straightened copper wire is arranged at the output end of the traction power device, a cutting mechanism for cutting the copper wire is arranged at the output end of the discharging guide structure, a rear guide plate structure is arranged at the workstation after the cutting mechanism, a telescopic pressing mechanism for pressing the copper wire is arranged after the rear guide plate structure, and a bending mechanism is arranged at the workstation after the telescopic pressing mechanism. The traditional manual operation mode is replaced, and the work efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of electronic component processing equipment, and in particular to an automatic forming machine and method for a U-shaped coil of a transformer enameled wire. Background Art

[0002] In the production process of small transformer electronic components, the enameled wire needs to be wound. The internal coil is a U-shaped coil, which is made by bending thick copper wire. In addition, the spacing between the two pins and the bending angle accuracy are required to be high.

[0003] At present, the bending forming of U-shaped coils is usually mainly carried out by manual bending. The manual bending method has low work efficiency and high labor intensity for operators. In the manual bending process, the spacing accuracy requirements between the pins cannot be guaranteed, and the bending angle cannot be guaranteed, and thus the quality of the product cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic forming machine and method for a U-shaped coil of a transformer enameled wire. The automatic forming machine can be used for the fully automatic bending, forming and cutting operations of the U-shaped coil of a transformer component, thereby realizing its fully automated production, replacing the traditional manual operation mode, greatly improving the work efficiency, ensuring the forming accuracy of the U-shaped coil, and ultimately ensuring the quality of the product.

[0005] In order to achieve the above technical features, the object of the present invention is achieved as follows: an automatic forming machine for a transformer enameled wire U-shaped coil, which includes a copper wire coil support frame for storing copper wire coils;

[0006] It also includes a main box, on the front side wall of which a feed guide structure for guiding the feeding of copper wire raw materials is fixed, the station before the feed guide structure is provided with a vertical straightening structure and a transverse straightening structure for composite straightening of the copper wire, the station after the feed guide structure is provided with a traction power device for pulling the copper wire, the output end of the traction power device is provided with a discharge guide structure for guiding the straightened copper wire, the output end of the discharge guide structure is provided with a cutting mechanism for cutting the copper wire, the station after the cutting mechanism is provided with a rear guide plate structure, a telescopic pressing mechanism for pressing the copper wire is provided after the rear guide plate structure, and a bending mechanism is provided at the station after the telescopic pressing mechanism.

[0007] The copper wire roll support frame includes a main support frame, a reinforcing cross bar is fixed at the bottom of the main support frame, a hinge plate is passed through the middle part of the main support frame, a secondary support frame is fixedly installed at the bottom of the hinge plate, a reel rod is supported between the hinge plates, and a copper wire storage disk is supported on the reel rod.

[0008] The feed guide structure includes a first guide plate, which is fixed to the front side wall of the main box by a first screw, and a first guide hole is processed on the first guide plate.

[0009] The vertical straightening structure includes a main beam, which is fixed to the front side wall of the main box by beam bolts, a second guide plate is fixed to the front end of the main beam, a second guide hole is processed on the second guide plate, and three groups of first vertical straightening rollers are supported and installed in parallel on the front side wall of the main beam. The first vertical straightening rollers cooperate with the second vertical straightening rollers on the top of the rollers. There are two groups of second vertical straightening rollers and they are arranged in parallel on the front side wall of the first press block. The two ends of the first press block are lifted and lowered on the top of the main beam by first adjusting bolts.

[0010] The transverse straightening structure includes three groups of first transverse straightening rollers supported in parallel on the top of the main beam, the first transverse straightening rollers and the second transverse straightening rollers on the sides thereof, the second transverse straightening rollers are supported on the second pressing block, and the two ends of the second pressing block are lifted and installed on the side wall of the main beam by second adjusting bolts.

[0011] The traction power device includes a driving roller, which is connected to the output shaft of the traction motor installed inside the main box, and the driving roller cooperates with the driven roller to press the copper wire between the two. The outside of the driving roller and the driven roller is provided with a rubber layer.

[0012] The material discharging guide structure includes a guide tube, one end of which is fixed on a first support seat, the first support seat is fixed on the side wall of the main box by a second screw, and the other end of the guide tube is supported on the side wall of the cutting mechanism.

[0013] The cutting mechanism comprises a first cutting knife, the first cutting knife cooperates with a second cutting knife to cut the copper wire, and a V-shaped cutting edge is provided in the middle of the first cutting knife and the second cutting knife;

[0014] The rear guide plate structure includes a rear guide plate, which is fixed to the front side wall of the main chassis by a third screw, and a guide notch is processed at the bottom end of the rear guide plate.

[0015] The telescopic clamping mechanism comprises an upper clamping plate and a lower clamping plate, wherein the upper clamping plate and the lower clamping plate are respectively mounted at the ends of the rotating telescopic shaft;

[0016] The bending mechanism comprises a rotating bending main shaft, a rotating arm is installed on the rotating bending main shaft, and a bending shaft is fixedly installed on the outer side wall of the other end of the rotating arm.

[0017] The automatic forming machine is used to bend and form a U-shaped winding frame of a transformer enameled wire, which comprises the following steps:

[0018] Step 1: Place the copper wire storage disk support on the copper wire coil support frame;

[0019] Step 2: Lead the copper wire out, and introduce it into the traction power device after passing through the vertical straightening structure, the horizontal straightening structure and the feed guide structure in sequence. Start the traction power device, and drive the copper wire forward through the rotation of the active roller and the driven roller;

[0020] Step 3: After the copper wire is pulled and straightened, it is transported to the discharge guide structure, and then passes through the cutting mechanism, the rear guide plate structure and the telescopic pressing mechanism from the discharge guide structure to reach the bending mechanism;

[0021] Step 4: When the copper wire extends out of the telescopic clamping mechanism to a length equal to the length A of the first pin of the U-shaped coil, the copper wire is clamped by the upper clamping plate and the lower clamping plate, and the bending mechanism is started. The bending main shaft is rotated to drive the rotating arm, and the bending shaft is driven by the rotating arm, and the copper wire is bent into the first pin by the bending shaft.

[0022] Step 5: After the first pin is bent, release the upper clamping plate and the lower clamping plate, continue to feed the copper wire, and when the feeding length is equal to the horizontal section length B of the U-shaped coil, start the upper clamping plate and the lower clamping plate again to clamp the copper wire, start the bending mechanism, drive the rotating arm by rotating the bending spindle, drive the bending axis by the rotating arm, and then bend the copper wire into a horizontal section by the bending axis;

[0023] Step 6: After the horizontal section is bent and formed, the upper clamping plate and the lower clamping plate are released, and the copper wire is continued to be conveyed. When the conveying length is equal to the length C of the second pin of the U-shaped coil, the telescopic clamping mechanism is controlled to retract, and the cutting mechanism is started. The copper wire is cut off at its tail by the cutting mechanism, thereby forming the entire U-shaped coil, and it automatically falls under its own weight, completing the automated production of a U-shaped coil;

[0024] Step 7: Extend the telescopic clamping mechanism and repeat steps 4 to 6 to continuously realize the automatic production of U-shaped coils.

[0025] The present invention has the following beneficial effects:

[0026] 1. This automatic forming machine can be used for the fully automatic bending, forming and cutting operations of the U-shaped coils of transformer components, thereby realizing its fully automated production, replacing the traditional manual operation method, greatly improving the work efficiency, ensuring the forming accuracy of the U-shaped coils, and ultimately ensuring the quality of the product.

[0027] 2. The copper wire coil support frame can be used to store the copper wire storage disk, thereby facilitating the subsequent copper wire unwinding process.

[0028] 3. The feed guide structure can be used for feeding operation of copper wire, thereby ensuring its subsequent straightening.

[0029] 4. The vertical straightening structure can be used for the preliminary straightening of the copper wire. During the straightening process, the copper wire is squeezed by a first vertical straightening roller and a second vertical straightening roller arranged up and down to achieve straightening of the copper wire.

[0030] 5. The above-mentioned transverse straightening structure can be used for secondary straightening of copper wire.

[0031] 6. The above-mentioned traction power device can be used to provide power for copper wire feeding.

[0032] 7. The discharge guide structure can be used to discharge the copper wire.

[0033] 8. The above-mentioned cutting mechanism can be used for cutting copper wires. When cutting is required, the first cutting knife and the second cutting knife are clamped at the same time to cut the copper wire.

[0034] 9. The telescopic clamping mechanism can be used to clamp the copper wire, thereby ensuring its subsequent bending process.

[0035] 10. The above-mentioned bending mechanism can be used to bend copper wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0038] Figure 2 It is a partial structural schematic diagram of the main chassis of the present invention.

[0039] Figure 3 This is a structural diagram of the U-shaped coil of the present invention.

[0040] Figure 4 For the present invention Figure 1 A partial enlarged view of the main chassis.

[0041] In the figure: copper wire coil support frame 1, copper wire 2, vertical straightening structure 3, horizontal straightening structure 4, feed guide structure 5, traction power device 6, discharge guide structure 8, main box 9, cutting mechanism 10, rear guide plate structure 11, telescopic pressing mechanism 12, bending mechanism 13, U-shaped coil 14;

[0042] Auxiliary support frame 101, hinge plate 102, hinge plate connecting rod 103, reel rod 104, copper wire storage disk 105, main support frame 106, strong cross bar 107;

[0043] A second guide hole 301, a second guide plate 302, a first vertical straightening roller 303, a main crossbeam 304, a first adjusting bolt 305, a first press-fit block 306, and a second vertical straightening roller 307;

[0044] A first transverse straightening roller 401, a crossbeam bolt 402, a second adjusting bolt 403, a second press block 404, and a second transverse straightening roller 405;

[0045] A first guide hole 501, a first guide plate 502, and a first screw 503;

[0046] Active roller 601, driven roller 602;

[0047] A second screw 801, a first support seat 802, and a guide tube 803;

[0048] A first cutting blade 1001, a V-shaped cutting edge 1002, and a second cutting blade 1003;

[0049] Rotate the telescopic shaft 1201, the upper clamping plate 1202, and the lower clamping plate 1203;

[0050] Rotate the bending spindle 1301, the rotating arm 1302, and the bending axis 1303;

[0051] A first pin 1401 , a horizontal section 1402 , and a second pin 1403 . DETAILED DESCRIPTION

[0052] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0053] Embodiment 1:

[0054] See also Figure 1-4, an automatic forming machine for U-shaped coils of transformer enameled wire, comprising a copper wire coil support frame 1 for storing copper wire coils; and a main box 9, a front side wall of which is fixed with a feed guide structure 5 for guiding the feed of the copper wire raw material, a station before the feed guide structure 5 is provided with a vertical straightening structure 3 and a horizontal straightening structure 4 for composite straightening of the copper wire, a station after the feed guide structure 5 is provided with a traction power device 6 for pulling the copper wire, an output end of the traction power device 6 is provided with a discharge guide structure 8 for guiding the straightened copper wire, an output end of the discharge guide structure 8 is provided with a cutting mechanism 10 for cutting the copper wire, a station after the cutting mechanism 10 is provided with a rear guide plate structure 11, a telescopic pressing mechanism 12 for pressing the copper wire is provided after the rear guide plate structure 11, and a bending mechanism 13 is provided at the station after the telescopic pressing mechanism 12. This automatic forming machine can be used for the fully automatic bending, forming and cutting operations of the U-shaped coils of transformer components, thereby realizing its fully automated production, replacing the traditional manual operation method, greatly improving work efficiency, ensuring the forming accuracy of the U-shaped coils, and ultimately ensuring the quality of the product.

[0055] It adopts a fully automated loading process, and after loading, it can realize automatic feeding of copper wire, and then cooperate with the subsequent telescopic pressing mechanism 12 and bending mechanism 13 to realize automatic bending and forming.

[0056] Furthermore, the copper wire roll support frame 1 includes a main support frame 106, a reinforcing cross bar 107 is fixed at the bottom of the main support frame 106, a hinge plate 102 is passed through the middle part of the main support frame 106, a secondary support frame 101 is fixedly installed at the bottom of the hinge plate 102, a reel rod 104 is supported between the hinge plates 102, and a copper wire storage disk 105 is supported on the reel rod 104. The copper wire roll support frame 1 can be used to store the copper wire storage disk 105, thereby facilitating the subsequent copper wire pay-off process.

[0057] Furthermore, the feed guide structure 5 includes a first guide plate 502, which is fixed to the front side wall of the main box 9 by a first screw 503, and a first guide hole 501 is processed on the first guide plate 502. The feed guide structure 5 can be used for feeding operation of copper wire, thereby ensuring its subsequent straightening.

[0058] Further, the vertical straightening structure 3 includes a main beam 304, which is fixed to the front side wall of the main box 9 by beam bolts 402, a second guide plate 302 is fixed to the front end of the main beam 304, a second guide hole 301 is processed on the second guide plate 302, and three groups of first vertical straightening rollers 303 are supported and installed in parallel on the front side wall of the main beam 304, the first vertical straightening rollers 303 cooperate with the second vertical straightening rollers 307 on the top thereof, and there are two groups of second vertical straightening rollers 307, which are arranged in parallel on the front side wall of the first pressing block 306, and the two ends of the first pressing block 306 are lifted and installed on the top of the main beam 304 by first adjusting bolts 305. The vertical straightening structure 3 can be used for the preliminary straightening of copper wires. During the straightening process, the copper wires are straightened by the first vertical straightening rollers 303 and the second vertical straightening rollers 307 arranged up and down.

[0059] Furthermore, the transverse straightening structure 4 includes three groups of first transverse straightening rollers 401 supported in parallel on the top of the main beam 304, the first transverse straightening rollers 401 and the second transverse straightening rollers 405 on the side thereof, the second transverse straightening rollers 405 are supported on the second press block 404, and the two ends of the second press block 404 are lifted and installed on the side wall of the main beam 304 through the second adjusting bolts 403. The above-mentioned transverse straightening structure 4 can be used for secondary straightening of copper wires. During the straightening process, the copper wires are straightened by the first transverse straightening rollers 401 and the second transverse straightening rollers 405 arranged in parallel, and the copper wires are squeezed by the two to achieve the straightening of the copper wires.

[0060] Furthermore, the traction power device 6 includes an active roller 601, which is connected to the output shaft of the traction motor installed inside the main box 9. The active roller 601 cooperates with the driven roller 602 to press the copper wire between the two. A rubber layer is provided on the outside of the active roller 601 and the driven roller 602. The traction power device 6 can be used to provide power for feeding the copper wire. During the working process, the active roller 601 cooperates with the driven roller 602 to drive the copper wire to be pulled and transported along the two rollers.

[0061] Preferably, the motor for driving the active roller 601 is a stepper motor, so as to accurately control the feeding amount of the copper wire.

[0062] Furthermore, the discharge guide structure 8 includes a guide tube 803, one end of which is fixed on the first support seat 802, the first support seat 802 is fixed on the side wall of the main box 9 by the second screw 801, and the other end of the guide tube 803 is supported on the side wall of the cutting mechanism 10. The discharge guide structure 8 can be used to discharge the copper wire. It is convenient for it to pass through the cutting mechanism 10 smoothly, and it is ensured that after the copper wire at the head is cut off, the subsequent copper wire can automatically pass through the guide tube 803, which plays a good guiding purpose.

[0063] Furthermore, the cutting mechanism 10 includes a first cutting knife 1001, the first cutting knife 1001 and the second cutting knife 1003 cooperate to cut the copper wire, and a V-shaped cutting edge 1002 is provided in the middle of the first cutting knife 1001 and the second cutting knife 1003; the above-mentioned cutting mechanism 10 can be used for cutting copper wire. When cutting is required, the first cutting knife 1001 and the second cutting knife 1003 are clamped at the same time to cut the copper wire.

[0064] Furthermore, the rear guide plate structure 11 includes a rear guide plate 1101, which is fixed to the front side wall of the main box 9 by a third screw 1103, and a guide notch 1002 is processed at the bottom end of the rear guide plate 1101. The copper wire can be smoothly guided into the telescopic clamping mechanism 12 by the rear guide plate structure 11.

[0065] Furthermore, the telescopic clamping mechanism 12 includes an upper clamping plate 1202 and a lower clamping plate 1203, which are respectively mounted at the ends of the rotating telescopic shaft 1201; the telescopic clamping mechanism 12 can be used to clamp the copper wire, thereby ensuring the subsequent bending process and the accuracy of the bending forming. During the bending process, the copper wire is reliably clamped by the telescopic clamping mechanism 12.

[0066] Furthermore, the bending mechanism 13 includes a rotating bending main shaft 1301, a rotating arm 1302 is installed on the rotating bending main shaft 1301, and a bending shaft 1303 is fixedly installed on the outer side wall of the other end of the rotating arm 1302. The above-mentioned bending mechanism 13 can be used to bend the copper wire. During the bending process, the rotating arm 1302 is driven by the rotating bending main shaft 1301, and the bending shaft 1303 is driven by the rotating arm 1302, and finally the copper wire is bent by the bending shaft 1303.

[0067] Embodiment 2:

[0068] The automatic forming machine is used to bend and form a U-shaped winding frame of a transformer enameled wire, which comprises the following steps:

[0069] Step 1: Support and place the copper wire storage disk 105 on the copper wire coil support frame 1;

[0070] Step 2: Lead the copper wire 2, and sequentially pass through the vertical straightening structure 3, the horizontal straightening structure 4 and the feed guide structure 5, and then introduce the traction power device 6, start the traction power device 6, and drive the copper wire 2 to be transported forward by the rotation of the active roller 601 and the driven roller 602;

[0071] Step 3: After the copper wire is pulled and straightened, it is transported to the discharge guide structure 8, and passes through the cutting mechanism 10, the rear guide plate structure 11 and the telescopic pressing mechanism 12 from the discharge guide structure 8 to reach the bending mechanism 13;

[0072] Step 4: When the copper wire extends out from the end of the telescopic clamping mechanism 12 to a length equal to the length A of the first pin 1401 of the U-shaped coil 14, the copper wire is clamped by the upper clamping plate 1202 and the lower clamping plate 1203, and the bending mechanism 13 is started. The bending main shaft 1301 is rotated to drive the rotating arm 1302, and the rotating arm 1302 drives the bending shaft 1303, and then the copper wire is bent into the first pin 1401 by the bending shaft 1303;

[0073] Step 5: After the first pin 1401 is bent into shape, the upper clamping plate 1202 and the lower clamping plate 1203 are released, and the copper wire 2 is continuously conveyed. When the conveyed length is equal to the length B of the horizontal section 1402 of the U-shaped coil 14, the upper clamping plate 1202 and the lower clamping plate 1203 are started again to clamp the copper wire, and the bending mechanism 13 is started. The rotating arm 1302 is driven by the rotating arm 1302, and the bending axis 1303 is driven by the rotating arm 1302, and then the copper wire is bent into the horizontal section 1402 by the bending axis 1303;

[0074] Step 6: After the horizontal section 1402 is bent and formed, the upper clamping plate 1202 and the lower clamping plate 1203 are released, and the copper wire 2 is continuously conveyed. When the conveyed length is equal to the length C of the second pin 1403 of the U-shaped coil 14, the telescopic clamping mechanism 12 is controlled to retract, and the cutting mechanism 10 is started. The copper wire is cut off at its tail by the cutting mechanism 10, thereby forming the entire U-shaped coil 14, and the copper wire falls automatically under its own weight, completing the automated production of a U-shaped coil.

[0075] Step 7: Extend the telescopic pressing mechanism 12 and repeat steps 4 to 6 to continuously realize the automatic production of U-shaped coils.

Claims

1. An automatic forming machine for U-shaped coils of transformer enameled wire, characterized in that: The invention comprises a copper wire coil support frame (1) for storing copper wire coils; It also comprises a main box (9), a feed guide structure (5) for guiding the feeding of copper wire raw materials is fixed on the front side wall of the main box (9), a vertical straightening structure (3) and a horizontal straightening structure (4) for composite straightening of the copper wire are arranged at the station before the feed guide structure (5), a traction power device (6) for pulling the copper wire is arranged at the station after the feed guide structure (5), a discharge guide structure (8) for guiding the straightened copper wire is arranged at the output end of the traction power device (6), a cutting mechanism (10) for cutting the copper wire is arranged at the output end of the discharge guide structure (8), a rear guide plate structure (11) is arranged at the station after the cutting mechanism (10), a telescopic pressing mechanism (12) for pressing the copper wire is arranged after the rear guide plate structure (11), and a bending mechanism (13) is arranged at the station after the telescopic pressing mechanism (12); The copper wire reel support frame (1) comprises a main support frame (106), a reinforcing cross bar (107) is fixed at the bottom of the main support frame (106), a hinge plate (102) is passed through the middle part of the main support frame (106), a secondary support frame (101) is fixedly installed at the bottom of the hinge plate (102), a reel rod (104) is supported between the hinge plates (102), and a copper wire storage disk (105) is supported on the reel rod (104); The feed guide structure (5) comprises a first guide plate (502), the first guide plate (502) being fixed to the front side wall of the main box (9) by means of a first screw (503), and a first guide hole (501) being machined on the first guide plate (502); The vertical straightening structure (3) comprises a main crossbeam (304), the main crossbeam (304) being fixed to the front side wall of the main box (9) by crossbeam bolts (402), a second guide plate (302) being fixed to the front end of the main crossbeam (304), a second guide hole (301) being processed on the second guide plate (302), three groups of first vertical straightening rollers (303) being supported and installed in parallel on the front side wall of the main crossbeam (304), the first vertical straightening rollers (303) being matched with second vertical straightening rollers (307) at the top thereof, two groups of the second vertical straightening rollers (307) being arranged in parallel on the front side wall of the first pressing block (306), and the two ends of the first pressing block (306) being installed on the top of the main crossbeam (304) by means of first adjusting bolts (305); The transverse straightening structure (4) comprises three groups of first transverse straightening rollers (401) supported in parallel on the top of the main crossbeam (304), the first transverse straightening rollers (401) and second transverse straightening rollers (405) on the sides thereof, the second transverse straightening rollers (405) are supported on second pressing blocks (404), and both ends of the second pressing blocks (404) are lifted and installed on the side walls of the main crossbeam (304) via second adjusting bolts (403); The traction power device (6) comprises a driving roller (601), the driving roller (601) being connected to the output shaft of a traction motor installed inside the main engine box (9), the driving roller (601) being matched with a driven roller (602) and the copper wire being pressed tightly between the two, and the outside of the driving roller (601) and the driven roller (602) being provided with a rubber layer; The material discharging guide structure (8) comprises a guide tube (803), one end of the guide tube (803) is fixed on a first support seat (802), the first support seat (802) is fixed on a side wall of a main box (9) by a second screw (801), and the other end of the guide tube (803) is supported on a side wall of a cutting mechanism (10); The cutting mechanism (10) comprises a first cutting knife (1001), the first cutting knife (1001) cooperates with a second cutting knife (1003) to cut the copper wire, and a V-shaped cutting edge (1002) is provided in the middle of the first cutting knife (1001) and the second cutting knife (1003); The rear guide plate structure (11) comprises a rear guide plate (1101), the rear guide plate (1101) being fixed to the front side wall of the main chassis (9) by means of a third screw (1103), and a guide notch being machined at the bottom end of the rear guide plate (1101); The telescopic clamping mechanism (12) comprises an upper clamping plate (1202) and a lower clamping plate (1203), wherein the upper clamping plate (1202) and the lower clamping plate (1203) are respectively mounted at the ends of the rotating telescopic shaft (1201); The bending mechanism (13) comprises a rotating bending main shaft (1301), a rotating arm (1302) is mounted on the rotating bending main shaft (1301), and a bending shaft (1303) is fixedly mounted on the outer side wall of the other end of the rotating arm (1302).

2. A method for bending a transformer enameled wire U-shaped winding frame using the automatic forming machine for transformer enameled wire U-shaped coil according to claim 1, characterized in that: The method comprises the following steps: Step 1, supporting and placing the copper wire storage disk (105) on the copper wire coil support frame (1); Step 2: Lead the copper wire (2) out, pass it through the vertical straightening structure (3), the horizontal straightening structure (4) and the feed guide structure (5) in sequence, and then introduce it into the traction power device (6). Start the traction power device (6), and through the rotation of the active roller (601) and the driven roller (602), the copper wire (2) is pulled and transported forward; Step 3, after the copper wire is pulled and straightened, it is transported to the discharge guide structure (8), and passes through the cutting mechanism (10), the rear guide plate structure (11) and the telescopic pressing mechanism (12) from the discharge guide structure (8) to reach the bending mechanism (13); Step 4: when the copper wire extends out of the end of the telescopic clamping mechanism (12) to a length equal to the length A of the first pin (1401) of the U-shaped coil (14), the copper wire is clamped by the upper clamping plate (1202) and the lower clamping plate (1203), the bending mechanism (13) is started, the bending main shaft (1301) is rotated to drive the rotating arm (1302), the rotating arm (1302) drives the bending shaft (1303), and the copper wire is bent into the first pin (1401) by the bending shaft (1303); Step 5: After the first pin (1401) is bent into shape, the upper clamping plate (1202) and the lower clamping plate (1203) are released, and the copper wire (2) is continued to be conveyed. When the conveyed length is equal to the length B of the horizontal section (1402) of the U-shaped coil (14), the upper clamping plate (1202) and the lower clamping plate (1203) are started again to clamp the copper wire, and the bending mechanism (13) is started. The rotating arm (1302) is driven by rotating the bending main shaft (1301), and the bending shaft (1303) is driven by the rotating arm (1302), and the copper wire is bent into a horizontal section (1402) by the bending shaft (1303); Step 6: After the horizontal section (1402) is bent into shape, the upper clamping plate (1202) and the lower clamping plate (1203) are released, and the copper wire (2) is continued to be conveyed. When the conveyed length is equal to the length C of the second pin (1403) of the U-shaped coil (14), the telescopic clamping mechanism (12) is controlled to retract, and the cutting mechanism (10) is started. The copper wire is cut at its tail by the cutting mechanism (10), thereby forming the entire U-shaped coil (14), and the coil automatically falls down under its own weight, completing the automated production of a U-shaped coil; Step 7: Extend the telescopic pressing mechanism (12), and repeat steps 4 to 6 to continuously realize the automatic production of U-shaped coils.

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