Inlet and outlet wire inward surrounding winding forming die and winding method

Abstract

The invention discloses an incoming and outgoing line inward surrounding winding forming die and a winding method, and belongs to the technical field of winding dies. The bending point and the bending angle are controlled through the upper die bending pin, the wire blocking needle controls the middle section lead to not slide out of the wire outlet groove, the chamfer is arranged on the wire clamping block so that the bent lead can be guided to enter the wire clamping block to be clamped, the situation that bending and shaping are unqualified due to deviation of the lead is prevented, the shaping effect after bending is improved, and the product quality is effectively improved. And finally heating and forming to realize the forming process. The external inlet and outlet lead wire clamp clamps the inlet lead wire before winding, the outlet lead wire is bent to clamp the outlet lead wire, after heating and shaping, the built-in cutter can cut off the lead wire according to the length required by a customer, and the external tail wire mechanism treats the cut tail wire.

Description

Technical Field

[0001] The invention relates to the technical field of winding dies, and in particular to an inwardly encircling winding forming die for an inlet and outlet wire and a winding method. Background Art

[0002] As 5G and IoT technologies mature, Near Field Communication (NFC), as one of the main technologies for IoT information connection, is widely used in various mobile terminals. As a representative of mobile payment devices, smartphones are even more critical to NFC technology. In the application of mobile phone NFC technology, based on performance requirements, the production requirements and process characteristics of its core component NFC copper coil will also be diversified. The winding process requires more precision, and the accuracy and automation requirements for winding molds are increasing. Traditional winding methods and equipment production molds cannot meet the use requirements. Summary of the invention

[0003] The purpose of the present invention is to provide an inward winding forming die and a winding method for the inward winding of the inlet and outlet wires, which solves the problem that the outlet lead wire cannot be turned up and the coil layer is bent inward and the lead wire length does not meet customer needs.

[0004] To achieve the above-mentioned object, the present invention provides an inward winding forming die for inlet and outlet wires, comprising an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die fixing seat, an upper die pad, and an upper die cover, and the lower die assembly comprises a lower die cover, a lower die pad, a lower die fixing seat, and a die core; The lower mold assembly is provided with a coil lead-in wire clamp block assembly and a coil cutter assembly, and the coil lead-in wire clamp block assembly is fixed on the outer side of the lower mold assembly, and the upper mold assembly is provided with a coil lead-out bending assembly, a coil lead-out blocking assembly and a coil lead-out wire clamp block assembly, the coil lead-out bending assembly is installed on the inner side of the front of the wire slot of the upper mold cover, the coil lead-out blocking assembly is installed on the side of the wire slot of the upper mold cover, and the coil lead-out wire clamp block assembly is installed and fixed on the outer side of the rear of the wire slot of the upper mold cover.

[0005] Preferably, the coil lead-in wire clamp block assembly and the coil lead-out wire clamp block assembly respectively include an input wire clamp connection block, an input wire clamping piece, an output wire clamp connection block and an output wire clamping piece. The input wire clamp connection block and the output wire clamp connection block are respectively fixed to the outside of the lower mold assembly and the upper mold assembly. The lower ends of the input wire clamp connection block and the output wire clamp connection block are respectively fixed to the side ends of the lower mold pad and the upper mold pad by bolts. They have a certain thickness, and the upper ends of the input wire clamp connection block and the output wire clamp connection block are provided with wire clamping grooves.

[0006] Preferably, the incoming wire clamp and the outgoing wire clamp are both slid into the wire clamping groove and respectively include an incoming wire clamp block, an outgoing wire clamp block, an incoming wire clamp spring and an outgoing wire clamp spring, which are used to clamp the initial incoming wire for winding and the final outgoing wire to complete winding. The incoming wire clamp block and the outgoing wire clamp block are both provided with chamfers to guide the incoming and outgoing leads into the clamp block for clamping, so as to prevent the incoming and outgoing leads from deviating.

[0007] Preferably, the coil lead-out blocking assembly includes a bayonet connector block and a wire blocking member, the bayonet connector is bolted to the inner plane of the upper mold pad, the bayonet connector has a bayonet slot, the wire blocking member is arranged on the bayonet slot, and includes a wire blocking needle and a bayonet spring, the upper column end of the wire blocking needle passes through the upper mold cover to limit the sliding position of the lead-out wire, and the bayonet spring is located between the lower column end of the wire blocking needle and the bayonet slot.

[0008] Preferably, the cutter assembly includes a cutter connecting piece and a cutter piece. The cutter connecting piece is fixed to the inner side of the lower mold pad by bolts. A cutter groove is provided on the cutter connecting piece. The cutter piece is slidably arranged in the cutter groove. The cutter assembly includes a cutter, a cutter spring and a cutter fixing pin. The top end of the cutter is bent and extended to form a bent portion. The cutter spring is located between the bent portion and the cutter connecting block. A sliding waist groove hole is provided on the cutter, and the cutter fixing pin is passed through the waist groove hole.

[0009] Preferably, the coil lead bending assembly includes a bending pin stopper, a bending pin assembly, and a limiting pusher. The bending pin stopper is arranged on the outside of the lower mold assembly. A bending pin slide groove is opened in the bending pin stopper. The bending pin assembly is slidably arranged in the bending pin slide groove and includes a bending pin seat and a bending pin. The bending pin is slidably arranged in the bending pin seat.

[0010] Preferably, the limit pushing member includes a limit member, a limit spring, and a push member. A limit groove and a push groove are provided on the bending pin block. The limit member is slidably disposed in the limit groove. The push member is slidably disposed in the push groove and is connected to the push spring. A limit square groove is provided on the bending pin seat. The limit spring is disposed on the limit member. The contact surfaces of the limit member and the push block are both inclined surfaces.

[0011] A winding method for an inwardly wound winding forming die with an inwardly wound inlet and outlet wires, comprising the following steps: S1. The wire-pulling clamp on the wire wheel mechanism moves horizontally, and the mold core in the lower mold assembly pushes up. The wire-pulling clamp and the wire wheel carry the wire to send the cable into the wire groove of the mold core of the lower mold. The lower mold clamp outside the lower mold opens the wire clamp under the force of the external top block, and the cable is sent into the lower wire clamp. The lower wire clamp block descends to clamp the incoming wire head, and the wire-pulling clamp retreats. At this time, the upper mold moves downward to close the mold with the lower mold, the mold core rises, and the cable is pressed by the upper mold cover. The upper and lower molds begin to rotate clockwise at the same frequency and wind to the specified number of turns; S2. The bending pin on the upper mold cover presses the coil under the force of the outer ejector block, the upper mold opens and closes the gap of the specified distance, the upper and lower molds rotate 90° clockwise, the wire wheel deflects upward, and the lead head is pulled by the wire wheel, bends from the side of the bending pin, turns over the coil layer, slides horizontally into the gap between the upper and lower molds along the edge of the bending pin, crosses the mold core plane, and enters the upper mold groove on the upper mold cover under the positioning of the wire blocking needle. The upper mold wire clamp outside the upper mold opens under the force of the upper mold part ejector block, the cable is fed into the upper wire, the upper wire clamp block descends, clamps the lead head, and the wire clamp moves horizontally to the connection between the wire wheel and the mold cable, clamps the cable outside the mold and cuts it off, enters the heating process, and the upper and lower molds continue to rotate; S3. After the heating process is completed, the upper and lower wire clamps of the mold rotate to the specified position. The inner cutter of the lower mold core rises under the force of the outer top block of the lower mold, cutting off the in-and-out lead heads to retain the lead length required by the customer. The outer tail wire clamping mechanism extends into the upper and lower mold clamps to clamp the tail wire. The upper and lower mold clamps open, and the tail wire clamping mechanism takes out the excess tail wire. The upper mold rises, the mold core descends, and the mounting fixture takes out the formed coil, completing a cycle of the winding station.

[0012] Therefore, the present invention adopts an inward winding forming die and winding method of the above structure, which has the following beneficial effects: (1) In the present invention, the bending point and the bending angle are controlled by the bending pin of the upper mold, and the wire blocking pin controls the middle lead to prevent it from slipping out of the wire groove. A chamfer is set on the wire clamping block to guide the lead after bending into the wire clamping block for clamping, thereby preventing the lead from running off and causing unqualified bending and shaping, improving the shaping effect after bending, effectively improving the product quality, and finally heating and forming.

[0013] (2) In the present invention, the external lead-in and lead-out clamps clamp the lead-in before winding, and clamp the lead-out after bending. After heating and shaping, the built-in cutter can cut the lead according to the length required by the customer, and the external tail wire mechanism processes the tail wire after cutting.

[0014] (3) The bending point and bending angle are controlled by the upper mold bending pin. The wire blocking pin controls the middle lead to prevent it from slipping out of the wire slot. The wire clamping block is chamfered to guide the bent lead into the wire clamping block for clamping, preventing the lead from running off and causing unqualified bending and shaping, improving the shaping effect after bending, effectively improving product quality, and finally heating and forming. The external lead in and out wire clamp clamps the incoming lead before winding, and clamps the outgoing lead after the outgoing lead is bent. After heating and shaping, the built-in cutter can cut the lead according to the length required by the customer, and the external tail wire mechanism handles the tail wire after cutting.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of an inwardly encircling winding forming die and a winding method of an inlet and outlet wire of the present invention; Figure 2 It is a schematic structural diagram of a lower mold assembly of an inward-directed winding molding mold and a winding method for an inlet and outlet wire of the present invention; Figure 3 It is a schematic diagram of the structure of an upper mold assembly of an inward-circling winding forming mold and a winding method for an inlet and outlet wire of the present invention; Figure 4 It is a schematic structural diagram of a coil inlet clamping block assembly of an inlet and outlet wire inwardly surrounding winding forming die and winding method of the present invention; Figure 5 It is a schematic structural diagram of a coil outlet clamping assembly of an inwardly encircling winding forming die and a winding method of an inlet and outlet wire of the present invention; Figure 6 It is a schematic structural diagram of a coil cutter assembly of an inwardly encircling winding forming die and a winding method of an inlet and outlet wire of the present invention; Figure 7 It is a schematic structural diagram of a coil bending pin assembly of an inwardly encircling winding forming die and a winding method of an inlet and outlet wire of the present invention; Figure 8 It is a schematic structural diagram of a coil lead-out blocking assembly of an inwardly encircling winding forming die and a winding method of the present invention; Fig. 9 A schematic diagram of the position of the lower mold surface of an inward-directed winding molding mold and a winding method for an inlet and outlet wire of the present invention; Reference numerals 1. Upper mold assembly, 2. Lower mold assembly, 3. Coil lead bending assembly, 4. Coil lead blocking assembly, 5. Coil lead clamping block assembly, 6. Coil lead clamping block assembly, 7. Coil cutter assembly, 11. Upper mold fixing seat, 12. Upper mold pad, 13. Upper mold cover, 21. Lower mold fixing seat, 22. Lower mold pad, 23. Lower mold cover, 24. Mold core, 31. Bending pin, 32. Bending pin block, 33, pushing member, 34, pushing spring, 35, limiting member, 36, limiting spring, 41, thread stop pin, 42, bayonet connector, 43, bayonet spring, 51, wire outlet clamp block, 52, wire outlet clamp connecting block, 53, wire outlet clamp spring, 61, wire inlet clamp block, 62, wire inlet clamp connecting block, 63, wire inlet clamp spring, 71, cutter, 72, cutter connecting block, 73, cutter spring. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example The present invention provides an inward-winding forming die for inward-winding of inlet and outlet wires and a winding method, comprising an upper die assembly 1 and a lower die assembly 2, wherein the upper die assembly 1 comprises an upper die fixing seat 11, an upper die pad 12, and an upper die cover 13, and the lower die assembly 2 comprises a lower die cover 23, a lower die pad 22, a lower die fixing seat 21, and a die core 24; The lower mold assembly 2 is provided with a coil lead-in clamp block assembly 6 and a coil cutter assembly 7. The coil lead-in clamp block assembly 6 is fixed to the outer side of the lower mold assembly 2. The upper mold assembly 1 is provided with a coil lead-out bending assembly 3, a coil lead-out blocking assembly 4 and a coil lead-out clamp block assembly 5. The coil lead-out bending assembly 3 is installed on the inner side of the front of the wire groove of the upper mold cover 13, the coil lead-out blocking assembly 3 is installed on the side of the wire groove of the upper mold cover 12, and the coil lead-out clamp block assembly 5 is installed and fixed on the outer side of the rear of the wire groove of the upper mold cover 13.

[0020] The coil lead-in wire clamp block assembly 6 and the coil lead-out wire clamp block assembly 5 respectively include an input wire clamp connection block 61, an input wire clamping piece, an output wire clamp connection block 51 and an output wire clamping piece. The input wire clamp connection block 62 and the output wire clamp connection block 52 are respectively fixed on the outside of the lower mold assembly 2 and the upper mold assembly 1. The lower ends of the input wire clamp connection block 62 and the output wire clamp connection block 52 are respectively fixed to the side ends of the lower mold pad 22 and the upper mold pad 12 by bolts, and have a certain thickness. The upper ends of the input wire clamp connection block 62 and the output wire clamp connection block 52 are provided with clamping grooves.

[0021] The incoming wire clamp and the outgoing wire clamp are both slid in the wire clamping groove and respectively include an incoming wire clamp block 61, an outgoing wire clamp block 51, an incoming wire clamp spring 63 and an outgoing wire clamp spring 53, which are used to clamp the initial incoming wire for winding and the final outgoing wire to complete the winding. The incoming wire clamp block 61 and the outgoing wire clamp block 51 are both chamfered to guide the incoming and outgoing leads into the clamp block for clamping to prevent the incoming and outgoing leads from running off.

[0022] The lead-out wire blocking assembly 4 includes a bayonet connector block 42 and a wire blocking member. The bayonet connector 42 is bolted to the inner plane of the upper mold pad 12. The bayonet connector 42 has a bayonet slot. The wire blocking member is arranged on the bayonet slot and includes a wire blocking needle 41 and a bayonet spring 42. The upper column end of the wire blocking needle 41 passes through the upper mold cover 13 to limit the sliding position of the lead-out wire. The bayonet spring 42 is located between the lower column end of the wire blocking needle and the bayonet slot.

[0023] The cutter assembly 7 includes a cutter connecting piece 72 and a cutter piece. The cutter connecting piece 72 is fixed to the inner side of the lower mold pad 22 by bolts. A cutter groove is provided on the cutter connecting piece 72. The cutter piece is slidably arranged in the cutter groove. The cutter assembly 7 includes a cutter 71, a cutter spring 73 and a cutter fixing pin. The top end of the cutter is bent and extended to form a bent portion. The cutter spring 73 is located between the bent portion and the cutter connecting piece 72. A sliding waist groove hole is provided on the cutter 71, and the cutter fixing pin is penetrated into the waist groove hole.

[0024] The coil lead bending assembly 3 includes a bending pin stopper 32, a bending pin assembly, and a limiting pusher. The bending pin stopper 32 is arranged on the outside of the lower mold assembly 2. A bending pin slide groove is provided in the bending pin stopper 32. The bending pin assembly is slidably arranged in the bending pin slide groove, including a bending pin seat and a bending pin 31. The bending pin 31 is slidably arranged in the bending pin seat.

[0025] The limiting pusher member includes a limiting member 35, a limiting spring 36, and a pusher member 33. A limiting groove and a pusher groove are provided on the bending pin block 32. The limiting member 25 is slidably disposed in the limiting groove. The pusher member 33 is slidably disposed in the pusher groove and is connected to the pusher spring 34. A limiting square groove is provided on the bending pin seat. The limiting spring 36 is disposed on the limiting member 35. The contact surfaces of the limiting member and the pusher block are both inclined surfaces.

[0026] A winding method for an inwardly wound winding forming die with an inwardly wound inlet and outlet wires, comprising the following steps: S1. The wire-pulling clamp on the wire wheel mechanism moves horizontally, and the mold core in the lower mold assembly pushes up. The wire-pulling clamp and the wire wheel carry the wire to send the cable into the wire groove of the mold core of the lower mold. The lower mold clamp outside the lower mold opens the wire clamp under the force of the external top block, and the cable is sent into the lower wire clamp. The lower wire clamp block descends to clamp the incoming wire head, and the wire-pulling clamp retreats. At this time, the upper mold moves downward to close the mold with the lower mold, the mold core rises, and the cable is pressed by the upper mold cover. The upper and lower molds begin to rotate clockwise at the same frequency and wind to the specified number of turns; S2. The bending pin on the upper mold cover presses the coil under the force of the outer ejector block, the upper mold opens and closes the gap of the specified distance, the upper and lower molds rotate 90° clockwise, the wire wheel deflects upward, and the lead head is pulled by the wire wheel, bends from the side of the bending pin, turns over the coil layer, slides horizontally into the gap between the upper and lower molds along the edge of the bending pin, crosses the mold core plane, and enters the upper mold groove on the upper mold cover under the positioning of the wire blocking needle. The upper mold wire clamp outside the upper mold opens under the force of the upper mold part ejector block, the cable is fed into the upper wire, the upper wire clamp block descends, clamps the lead head, and the wire clamp moves horizontally to the connection between the wire wheel and the mold cable, clamps the cable outside the mold and cuts it off, enters the heating process, and the upper and lower molds continue to rotate; S3. After the heating process is completed, the upper and lower wire clamps of the mold rotate to the specified position. The inner cutter of the lower mold core rises under the force of the outer top block of the lower mold, cutting off the in-and-out lead heads to retain the lead length required by the customer. The outer tail wire clamping mechanism extends into the upper and lower mold clamps to clamp the tail wire. The upper and lower mold clamps open, and the tail wire clamping mechanism takes out the excess tail wire. The upper mold rises, the mold core descends, and the mounting fixture takes out the formed coil, completing a cycle of the winding station.

[0027] The lower mold assembly includes a lower mold cover 23, a lower mold pad 22, a lower mold fixing seat 21 and a mold core 24. The surface flatness and surface treatment process of the lower mold cover 23 have strict requirements, so that the coil can be wound better, and its surface treatment process can better prevent the coil from sticking to the lower mold cover 23. A mold core 24 is set in the middle of the lower mold cover 23. The outer diameter of the mold core 24 determines the inner and outer diameters of the coil. Ventilation holes are set on the mold core 24 for heat dissipation of the mold. A lower waist groove hole is set on the mold core 24. The function of the lower waist groove hole is to limit the distance for demolding and core pulling of the coil.

[0028] The wire feeding wheel carries the wire into the space between the upper and lower molds. When external force is applied, the wire feeding clamp opens and the wire feeding wheel carries the wire in. After the external force is removed, the wire feeding clamp closes and clamps the wire. The wire begins to be wound clockwise around the core of the lower mold assembly until the inner and outer diameters and thickness of the coil meet the customer's requirements.

[0029] After the winding is completed, the coil has inlet and outlet leads. Because the coil has very strict requirements on the bending of the leads, the lead wires need to be bent and shaped after the winding is completed.

[0030] The cutter assembly 7 is arranged inside the upper mold assembly, and can cut the lead length of the lead wire of equal length, and cut out the required lead length. After heating is completed, the cutter 72 rises to the surface height of the straight mold core 24 under the action of external driving force, cuts off the excess lead wire, and cools the coil to shape.

[0031] The coil lead-out bending pin assembly 3 and the coil lead-out blocking assembly 4 are both on the wire groove side of the upper mold cover 13. Under the traction of the wire wheel, the lead-out head is bent from the side of the bending pin 31, flipped over the coil layer, and slid laterally into the gap between the upper mold assembly 1 and the lower mold assembly 2 along the edge of the bending pin 31, crossed the plane of the mold core 24, and entered the upper mold groove on the upper mold cover 13 under the positioning of the wire blocking needle 41 to complete the lead-out bending.

[0032] Therefore, the present invention adopts the above-mentioned inward winding forming mold and winding method for the inward winding of the inlet and outlet wires, controls the bending point and the bending angle through the bending pin of the upper mold, and controls the middle section of the lead wire to prevent it from slipping out of the wire groove through the wire blocking pin. The wire clamping block is provided with a chamfer to guide the bent lead wire into the wire clamping block for clamping, to prevent the lead wire from running off and causing unqualified bending and shaping, to improve the shaping effect after bending, to effectively improve the product quality, and finally to heat and shape. The external inlet and outlet lead wire clamp clamps the inlet lead wire before winding, and clamps the outlet lead wire after the outlet lead wire is bent. After heating and shaping, the built-in cutter can cut the lead wire according to the length required by the customer, and the external tail wire mechanism processes the tail wire after cutting off.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A winding forming die for inward winding of inlet and outlet wires, characterized in that: It includes an upper mold assembly and a lower mold assembly, wherein the upper mold assembly includes an upper mold fixing seat, an upper mold pad, and an upper mold cover, and the lower mold assembly includes a lower mold cover, a lower mold pad, a lower mold fixing seat, and a mold core; The lower mold assembly is provided with a coil lead-in wire clamp block assembly and a coil cutter assembly, and the coil lead-in wire clamp block assembly is fixed on the outer side of the lower mold assembly, and the upper mold assembly is provided with a coil lead-out bending assembly, a coil lead-out blocking assembly and a coil lead-out wire clamp block assembly, the coil lead-out bending assembly is installed on the inner side of the front of the wire slot of the upper mold cover, the coil lead-out blocking assembly is installed on the side of the wire slot of the upper mold cover, and the coil lead-out wire clamp block assembly is installed and fixed on the outer side of the rear of the wire slot of the upper mold cover.

2. The inward winding forming die for inlet and outlet wires according to claim 1, characterized in that: The coil lead-in wire clamp block assembly and the coil lead-out wire clamp block assembly respectively include an incoming wire clamp connection block, an incoming wire clamping piece, an outgoing wire clamp connection block and an outgoing wire clamping piece. The incoming wire clamp connection block and the outgoing wire clamp connection block are respectively fixed to the outside of the lower mold assembly and the upper mold assembly. The lower ends of the incoming wire clamp connection block and the outgoing wire clamp connection block are respectively fixed to the side ends of the lower mold pad and the upper mold pad by bolts. The upper ends of the incoming wire clamp connection block and the outgoing wire clamp connection block are provided with wire clamping grooves.

3. The inward winding forming die for inlet and outlet wires according to claim 2, characterized in that: The inlet and outlet clamps are slid in the clamping groove and respectively include an inlet clamp block, an outlet clamp block, an inlet clamp spring and an outlet clamp spring. The inlet clamp block and the outlet clamp block are both chamfered to guide the inlet and outlet leads into the clamp block for clamping.

4. The inward winding forming die for inlet and outlet wires according to claim 1, characterized in that: The coil lead-out blocking assembly includes a bayonet connector block and a wire blocking member. The bayonet connector is bolted to the inner plane of the upper mold pad. The bayonet connector has a bayonet slot. The wire blocking member is arranged on the bayonet slot and includes a wire blocking needle and a bayonet spring. The upper column end of the wire blocking needle passes through the upper mold cover to limit the sliding position of the lead-out wire. The bayonet spring is located between the lower column end of the wire blocking needle and the bayonet slot.

5. The inward winding forming die for inlet and outlet wires according to claim 1, characterized in that: The cutter assembly includes a cutter connecting piece and a cutter piece. The cutter connecting piece is fixed to the inner side of the lower mold pad by bolts. The cutter connecting piece is provided with a cutter groove. The cutter piece is slidably arranged in the cutter groove. The cutter assembly includes a cutter, a cutter spring and a cutter fixing pin. The top end of the cutter is bent and extended to form a bent portion. The cutter spring is located between the bent portion and the cutter connecting block. A sliding waist groove hole is provided on the cutter, and the cutter fixing pin is passed through the waist groove hole.

6. The inward winding forming die for inlet and outlet wires according to claim 1, characterized in that: The coil lead bending assembly includes a bending pin block, a bending pin assembly, and a limiting pusher. The bending pin block is arranged on the outside of the lower mold assembly. A bending pin slide groove is provided in the bending pin block. The bending pin assembly is slidably arranged in the bending pin slide groove and includes a bending pin seat and a bending pin. The bending pin is slidably arranged in the bending pin seat.

7. The inward winding forming die for inlet and outlet wires according to claim 6, characterized in that: The limit pusher comprises a limiter, a limit spring and a pusher. A limit groove and a pusher groove are provided on the bending pin block. The limiter is slidably arranged in the limit groove. The pusher is slidably arranged in the pusher groove and is connected to the pusher spring. A limit square groove is provided on the bending pin seat. The limit spring is arranged on the limiter. The contact surfaces of the limiter and the pusher block are both inclined surfaces.

8. A winding method for an inwardly wound winding forming mold for an inlet and outlet wire according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. The wire-pulling clamp on the wire-pulling wheel mechanism moves horizontally, and the core in the lower mold is pushed up. The wire-pulling clamp and the wire-pulling wheel carry the wire to send the cable into the wire groove of the core of the lower mold. The wire clamp of the lower mold placed outside the lower mold opens the wire clamp under the force of the external top block, and the cable is sent into the lower wire clamp. The lower wire clamp block descends to clamp the incoming wire head, and the wire-pulling clamp retreats. At this time, the upper mold moves downward to close the mold with the lower mold, the core rises, and the cable is pressed by the upper mold cover. The upper and lower molds begin to rotate clockwise at the same frequency and wind the specified number of turns; S2. The bending pin on the upper mold cover presses the coil under the force of the outer ejector block, the upper mold opens and closes the gap of the specified distance, the upper and lower molds rotate 90° clockwise, the wire wheel deflects upward, and the lead head is pulled by the wire wheel, bends from the side of the bending pin, turns over the coil layer, slides horizontally into the gap between the upper and lower molds along the edge of the bending pin, crosses the mold core plane, and enters the upper mold groove on the upper mold cover under the positioning of the wire blocking needle. The upper mold wire clamp outside the upper mold opens under the force of the upper mold part ejector block, the cable is fed into the upper wire, the upper wire clamp block descends, clamps the lead head, and the wire clamp moves horizontally to the connection between the wire wheel and the mold cable, clamps the cable outside the mold and cuts it off, enters the heating process, and the upper and lower molds continue to rotate; S3. After the heating process is completed, the upper and lower wire clamps of the mold rotate to the specified position. The inner cutter of the lower mold core rises under the force of the outer top block of the lower mold, cutting off the in-and-out lead heads to retain the lead length required by the customer. The outer tail wire clamping mechanism extends into the upper and lower mold clamps to clamp the tail wire. The upper and lower mold clamps open, and the tail wire clamping mechanism takes out the excess tail wire. The upper mold rises, the mold core descends, and the mounting fixture takes out the formed coil, completing a cycle of the winding station.

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