Bending forming die

Abstract

The utility model relates to the technical field of stamping devices, and provides a bending forming die which is used for bending a flat wire, the flat wire comprises a leg part and a head part, the bending forming die comprises an upper die and a lower die which are provided with first male dies, and the first male dies are provided with wire end pressing parts and wire leg pressing parts; the lower die comprises a second male die and a stop part, and the second male die is provided with a wire leg forming part which is provided with an embedding groove for the wire leg pressing part to press the leg part of the flat wire; the thread end forming part and the stop part jointly form a press-fit cavity for the thread end press-fit part to press the head part of the flat wire and enable the head part to bend and deform; the guide part is used for supporting the leg part and guiding the leg part to move into the embedding groove when the leg part is pressed by the wire leg pressing part; the guide part is formed on the peripheral side of the wire leg forming part, and the wire leg pressing part is provided with a receding opening which keeps away from the guide part. Compared with the prior art, the bending forming die provided by the utility model has the advantages that the flat wire can be supported through the guide part, and the bending forming effect of the flat wire is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping devices, in particular to a bending and forming die. Background Art

[0002] At present, a motor with a stator winding using a rectangular cross-section wire is called a flat wire motor (also called a Pin motor). Different from a common wound motor, a flat wire motor does not first wind a round wire into a specific coil and then embed it into the stator slot by a machine. Instead, a flat wire (also called a copper wire or a flat copper wire, hereinafter collectively referred to as a flat wire for the sake of unified technical terms) is preformed, inserted into the stator slot, and then formed and welded again at one or both ends to form the entire stator winding. The flat wire is beneficial to improving the slot filling factor of the motor. Generally, the slot filling factor of a round wire motor is about 50%, while that of a flat wire motor can reach more than 70%. According to the winding form of the flat wire motor, it can be further divided into Hair-pin winding (also called hairpin winding), I-Pin winding (also called I-shaped clip winding), wave winding, etc. The hairpin-shaped flat wire winding gets its name because its shape is more like a hairpin. Its advantage is that only one end needs to be welded, and its disadvantage is that the preparation is relatively complex. After the hairpin is formed, the hairpin wires are inserted into the stator core in groups, and finally assembled into a finished motor stator through equipment such as flaring, wire twisting, welding, and dipping paint. The process of the hairpin forming machine mainly includes unwinding, removing the paint film, cutting to a fixed length, and hairpin forming. The traditional die includes an upper die and a lower die. The punch of the upper die is provided with a forming part, and the punch of the lower die is provided with a groove part that fits with the forming part. When the dies are closed, the flat wire is bent and formed. However, due to the lack of support for the flat wire, the forming effect is affected. Content of the Utility Model

[0003] The purpose of the utility model is to provide a bending and forming die to solve the technical problem that in the existing die, there is a lack of effective support for the flat wire and the bending and forming effect is not good.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a bending and forming die for bending a flat wire. The flat wire includes two legs and a head respectively connected to the two legs. The die includes an upper die and a lower die with a first punch. The first punch is provided with a wire head pressing part and a wire leg pressing part; the lower die includes a second punch and a stop component. The second punch is provided with: a wire leg forming part having a fitting groove for the wire leg pressing part to press the leg of the flat wire into; a wire head forming part that, together with the stop component, forms a pressing cavity for the wire head pressing part to press the head of the flat wire into and make the head bend and deform; and a guiding part for supporting the leg and guiding the leg into the fitting groove when the wire leg pressing part presses down the leg; the guiding part is formed on the circumference of the wire leg forming part, and an avoidance opening is provided on the wire leg pressing part to avoid the guiding part.

[0005] Further, the guiding portion has a guiding inclined surface for the movement of the leg, and the guiding inclined surface extends from the surface of the guiding portion downward and in the direction of the wire leg forming portion to the fitting groove.

[0006] Further, a limiting portion is convexly provided on the surface of the guiding portion, and the limiting portion is located on the side of the guiding portion away from the wire leg forming portion.

[0007] In another embodiment, the first punch includes a wire head pressing seat and a wire leg pressing seat. The wire leg pressing seat is fixedly arranged on the top plate. The wire head pressing seat is arranged on the top plate and can move relative to the wire leg pressing seat along the die closing direction. A first elastic member is arranged between the wire head pressing seat and the top plate. A wire head pressing portion is arranged on the wire head pressing seat, and a wire leg pressing portion is arranged on the wire leg pressing seat.

[0008] Further, a dovetail groove is formed on the wire head pressing seat, and the wire leg pressing seat has a dovetail portion fitted in the dovetail groove.

[0009] Further, a guide post is arranged on the wire leg pressing seat, and a guide sleeve for cooperating with the guide post for guiding is arranged on the second punch.

[0010] Further, at least three wire head positioning pins are arranged on the second punch. The at least three wire head positioning pins are located on the wire head forming portion and are arranged at intervals along the extending direction of the press forming cavity.

[0011] In another embodiment, the second punch is fixedly arranged on the bottom plate, and the stop member is movably mounted on the bottom plate. The upper die includes a driving member for driving the stop member to move towards the second punch when the upper die and the lower die move for die closing.

[0012] Further, a fixing plate and a pressing plate are arranged on the bottom plate. The bottom plate, the fixing plate and the pressing plate jointly construct an installation space for the movement of the stop member. A second elastic member is arranged between the stop member and the fixing plate.

[0013] Further, the first punch includes a wire head pressing seat and a wire leg pressing seat. The wire leg pressing seat is fixedly arranged on the top plate. The wire head pressing portion is arranged on the wire head pressing seat, and the wire leg pressing portion is arranged on the wire leg pressing seat.

[0014] Compared with the prior art, the bending and forming die provided by the utility model includes an upper die and a lower die. The first punch of the upper die is provided with a wire head pressing portion and a wire leg pressing portion. The lower die includes a second punch and a stop member. The second punch is provided with a wire leg forming portion, a wire head forming portion and a guiding portion. The wire leg forming portion has a fitting groove for the wire leg pressing portion to press the leg of the flat wire into. The wire head forming portion and the stop member jointly form a press forming cavity for the wire head pressing portion to press the head of the flat wire into and make the head bend and deform. The guiding portion is used for supporting the leg and guiding the leg into the fitting groove when the wire leg pressing portion presses down the leg.

[0015] The beneficial effects of the bending and forming die provided by the present utility model are as follows: Compared with the prior art, the present utility model is provided with a guiding portion on the lower die, the leg of the flat wire is placed on the guiding portion, and when the dies are closed, it is guided by the guiding portion and moved into the fitting groove. In this way, the flat wire can be supported by the guiding portion to prevent the flat wire from deforming and protruding outside the die when the dies are closed, thereby ensuring the bending and forming effect of the flat wire. Brief Description of the Drawings

[0016] Figure 1 Fig. 6 is a three-dimensional schematic view of the bending and forming die and the flat wire provided in the first embodiment of the present utility model;

[0017] Figure 2 Fig. 10 is a three-dimensional schematic view of the upper die of the bending and forming die provided in the first embodiment of the present utility model after being turned over 180 degrees;

[0018] Figure 3 Fig. 14 is a three-dimensional schematic view of the upper die provided in the first embodiment of the present utility model;

[0019] Figure 4 Fig. 18 is a three-dimensional schematic view of the flat wire before forming in the bending and forming die provided in the second embodiment of the present utility model;

[0020] Figure 5 Fig. 22 is a three-dimensional schematic view of the upper die provided in the second embodiment of the present utility model;

[0021] Figure 6 Fig. 26 is a front view schematic view of the bending and forming die and the flat wire before the dies are closed provided in the second embodiment of the present utility model;

[0022] Figure 7 Fig. 30 is a sectional view schematic view of the bending and forming die and the flat wire before the dies are closed provided in the second embodiment of the present utility model;

[0023] Figure 8 Fig. 34 is a sectional view schematic view of the bending and forming die and the flat wire when the dies are closed provided in the second embodiment of the present utility model;

[0024] Figure 9 Fig. 38 is a three-dimensional schematic view of the bending and forming die and the flat wire after the dies are closed provided in the second embodiment of the present utility model;

[0025] Figure 10 Fig. 42 is a front view schematic view of the bending and forming die and the flat wire after the dies are closed provided in the second embodiment of the present utility model.

[0026] Brief Description of the Main Elements Symbols

[0027] 100, 100'-Bending and forming die; 1-Upper die; 10-First punch; 101-Thread end pressing part; 102-Thread leg pressing part; 1021-Blank holding part; 103-Avoidance opening; 11-Thread end pressing seat; 111-Dovetail groove; 112-Pin hole; 12-Thread leg pressing seat; 121-Dovetail part; 122-Guide pillar; 1a-First curved surface; 13-First elastic member; 2-Lower die; 20-Second punch; 201-Thread leg forming part; 2011-Fitting groove; 202-Thread end forming part; 2021-Pressing cavity; 203-Guiding part; 2031-Guiding inclined surface; 2032-Limiting part; 204-Guide bushing; 205-Thread end positioning pin; 2a-Second curved surface; 3-Top plate; 4-Bottom plate; 30-Stop component; 5-Driving component; 6-Fixing plate; 7-Pressing plate; 8-Second elastic member; 900-Flat wire; 901-Leg; 902-Head. Detailed implementation mode

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative work belong to the scope of protection of the present utility model.

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the implementation of the present utility model will be described in detail below with reference to the specific drawings.

[0030] For the convenience of narration, the "front", "rear", "left", "right", "upper" and "lower" mentioned hereinafter are consistent with the front, rear, left, right, upper and lower directions of the accompanying drawings themselves, but do not limit the structure of the present utility model.

[0031] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model belongs. The "first", "second" and similar terms used in the specification and claims of the patent application of the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one. Embodiment

[0032] See Figures 1 to 3, the bending and forming die 100' provided in this embodiment is used to bend the flat wire 9. After being bent and formed, the flat wire 9 is generally in a "∩" shape, including two legs 91 and a head 92 respectively connected to the two legs 91. The head 92 is generally in a "triangle" structure.

[0033] See Figures 1 to 3 , the bending and forming die 100' provided in this embodiment includes an upper die 1 and a lower die 2 that can be clamped together. The upper die 1 has a first punch 10. On the first punch 10, there are a wire head pressing part 101 for abutting against the head 92 and a wire leg pressing part 102 for abutting against the leg 91. The lower die 2 includes a second punch 20 and a stop member 30 located on one side of the second punch 20. On the second punch 20, there are a wire leg forming part 201, a wire head forming part 202, and a guiding part 203. The wire leg forming part 201 has a fitting groove 2011 for the wire leg pressing part 102 to press the leg 91 of the flat wire 9 into. The wire head forming part 202 and the stop member 30 jointly form a pressing cavity 2021 for the wire head pressing part 101 to press the head 92 of the flat wire 9 into and bend the head 92. The wire head forming part 202 is located between the wire leg forming part 201 and the stop member 30. The guiding part 203 is used to support the leg 91 and guide the leg 91 into the fitting groove 2011 when the wire leg pressing part 102 presses down the leg 91. The guiding part 203 is formed on the circumferential side of the wire leg forming part 201. An avoidance opening 103 for avoiding the guiding part 203 is provided on the wire leg pressing part 102. In this way, the flat wire 9 to be bent is placed on the second punch 20 of the lower die 2, its leg 91 is placed on the guiding part 203, and the head 92 is supported between the wire head forming part 202 and the stop member 30. When the upper die 1 and the lower die 2 approach, the wire head pressing part 101 of the first punch 10 presses the head 92 of the flat wire 9 into the pressing cavity 2021, and at the same time the wire leg pressing part 102 presses the leg 91 along the guiding part 203 downwards; as the upper die 1 and the lower die 2 are clamped together, the wire leg pressing part 102 presses the leg 91 into the fitting groove 2011, and the wire head pressing part 101 presses the head 92 tightly to the bottom of the pressing cavity 2021 and makes the head 92 of the flat wire 9 pressed into a preset bent shape for insertion into the stator for the assembly of the motor stator.

[0034] See Figures 1 to 3, the upper die 1 provided in this embodiment includes a first punch 10, which is fixedly installed on the top plate 3 by all existing fasteners such as screws and bolts. The first punch 10 includes a wire head pressing seat 11 and a wire leg pressing seat 12. A wire head pressing portion 101 is provided on the wire head pressing seat 11, and a wire leg pressing portion 102 is provided on the wire leg pressing seat 12. In this embodiment, the surface of the first punch 10 on the side away from the top plate 3 has a first curved surface 1a that protrudes downward toward the lower die 2. The first punch 10 includes a wire leg pressing seat 12 and a wire head pressing seat 11 that are connected to each other. The first curved surface 1a of the wire head pressing portion 101 on the wire head pressing seat 11 is below the first curved surface 1a of the wire leg pressing portion 102 on the wire leg pressing seat 12. After the mold is closed, the first curved surface 1a of the wire head pressing portion 101 and the first curved surface 1a of the wire leg pressing portion 102 are both on the parting surface. When the mold is closed, the head 92 of the flat wire 9 contacts and presses down the first curved surface 1a of the wire head pressing portion 101. The wire leg pressing portion 102 includes two pressing parts 1021, which are respectively located on both sides of the wire leg pressing portion 102 and protrude downward respectively to abut against the legs 91 of the flat wire 9. When the mold is closed, the legs 91 are pressed against the guiding portion 203 to move and are pressed into the fitting groove 2011. The wire leg pressing seat 12 is fixedly arranged on the top plate 3, and the wire head pressing seat 11 is arranged on the top plate 3 and can move relative to the wire leg pressing seat 12 along the mold closing direction. A first elastic member 13 is arranged between the wire head pressing seat 11 and the top plate 3. The first elastic member 13 is, but not limited to, a compression spring, and its two ends respectively abut against the wire head pressing seat 11 and the top plate 3. Before the mold is closed, the first elastic member 13 pushes the wire head pressing seat 11 away from the top plate 3. When the mold is closed, the first curved surface 1a of the wire head pressing seat 11 first contacts the head 92 of the flat wire 9, and the first elastic member 13 can play a buffering role for the wire head pressing seat 11.

[0035] In other embodiments, the wire head pressing seat 11 and the wire leg pressing seat 12 are integrally formed and are both fixed on the top plate 3.

[0036] See Figures 1 to 3, the lower die 2 provided in this embodiment includes a second punch 20 and a stop member 30 located on one side of the second punch 20. The second punch 20 and the stop member 30 are fixedly installed on the bottom plate 4 by all existing fasteners such as screws and bolts. In this embodiment, the surface of the second punch 20 away from the bottom plate 4 has a second curved surface 2a that is recessed downward in the middle. After mold closing, the second curved surface 2a is on the parting surface. The second punch 20 includes a leg forming part 201 and a head forming part 202 that are connected to each other. The head forming part 202 is located between the leg forming part 201 and the stop member 30. The head forming part 202 and the stop member 30 jointly form a pressing cavity 2021 for the head pressing part 101 of the flat wire 9 to press the head 92 of the flat wire 9 into and bend the head 92. The leg forming part 201 has a fitting groove 2011 for the leg pressing part 102 of the flat wire 9 to press the legs 91 of the flat wire 9 into. The fitting groove 2011 is not limited to two, and is respectively located on both sides of the leg forming part 201. The number of guiding parts 203 is not limited to two, and the two guiding parts 203 are respectively connected to both sides of the leg forming part 201. An avoidance opening 103 that avoids the guiding part 203 is provided on the pressing part 1021 of the leg pressing part 102. It should be noted that for the flat wire 9 with a large bending forming requirement, by adding the guiding parts 203 to support the legs 91, when the head 92 of the flat wire 9 is formed, the leg pressing part 102 of the first punch 10 presses the two legs 91 into the fitting groove 2011 along the surface of the guiding part 203 to complete the bending forming of the flat wire 9.

[0037] Specifically, the guiding part 203 has a guiding inclined surface 2031 for the legs 91 to move. The guiding inclined surface 2031 extends from the surface of the guiding part 203 downward and toward the leg forming part 201 to the fitting groove 2011. In this way, the legs 91 of the flat wire 9 are respectively pressed by the pressing part 1021 of the leg pressing part 102 against the corresponding guiding inclined surface 2031 and are pressed into the fitting groove 2011 along the guiding inclined surface 2031.

[0038] From Figure 1 and Figure 2 It can be seen that in this embodiment, a limiting part 2032 is convexly formed on the surface of the guiding part 203. The limiting part 2032 is located on the side of the guiding part 203 away from the leg forming part 201, which can prevent the legs 91 of the flat wire 9 from deforming and protruding outside the lower die 2.

[0039] From Figure 2 and Figure 3 It can be seen that in this embodiment, a dovetail groove 111 is provided on the head pressing seat 11, and the leg pressing seat 12 has a dovetail part 121 that fits into the dovetail groove 111. In this way, through the cooperation and sliding of the dovetail part 121 and the dovetail groove 111 on the head pressing seat 11, the connection is stable and reliable and is not easy to loosen.

[0040] See Figures 1 to 3 Figures 1 to 3 , in this embodiment, a guide post 122 is provided on the wire leg pressing seat 12, and a guide sleeve 204 that cooperates with the guide post 122 for guiding is provided on the second punch 20. In this way, through the guidance of the guide post 122 and the guide sleeve 204, it can be ensured that the mold moves with precise positioning and guides the stroke of the mold.

[0041] See Figures 1 to 3 Figures 1 to 3 , in this embodiment, a wire head positioning pin 205 is provided on the second punch 20. The number of the wire head positioning pins 205 is three but not limited to three. The three wire head positioning pins 205 are located on the wire head forming part 202 and are arranged at intervals along the extending direction of the pressing cavity 2021. The positions of the three wire head positioning pins 205 correspond to the three corners of the head 92 of the "triangle" structure. A pin hole 112 corresponding to the wire head positioning pin 205 is formed on the wire head pressing seat 11. In this way, when the head 92 of the flat wire 9 is placed in the space between the wire head positioning pin 205 and the stop member 30, when the wire head pressing part 101 presses down, the clamping and positioning of the head 92 by the wire head positioning pin 205 and the side wall of the stop member 30 can prevent the head 92 of the flat wire 9 from shifting during the bending process and ensure the bending deformation accuracy of the bending forming. Embodiment

[0042] Next, in combination with Figures 4 to 10 Only the differences from those in Embodiment 1 will be described in detail.

[0043] See Figures 4 to 10 Figures 4 to 10 , the bending forming molds 100' and 100'' provided in this embodiment include an upper mold 1 and a lower mold 2 that can be mutually closed. The upper mold 1 has a first punch 10. A wire head pressing part 101 for abutting against the head 92 and a wire leg pressing part 102 for abutting against the leg 91 are provided on the first punch 10. The lower mold 2 includes a second punch 20 and a stop member 30 located on one side of the second punch 20. A wire leg forming part 201, a wire head forming part 202, and a guiding part 203 are provided on the second punch 20. The wire leg forming part 201 has a fitting groove 2011 for the wire leg pressing part 102 to press the leg 91 of the flat wire 9 into. The wire head forming part 202 and the stop member 30 jointly form a pressing cavity 2021 for the wire head pressing part 101 to press the head 92 of the flat wire 9 into and bend the head 92. The wire head forming part 202 is located between the wire leg forming part 201 and the stop member 30. The guiding part 203 is used to support the leg 91 and guide the leg 91 into the fitting groove 2011 when the wire leg pressing part 102 presses down the leg 91. The guiding part 203 is formed on the circumferential side of the wire leg forming part 201. An avoidance opening 103 that avoids the guiding part 203 is formed on the wire leg pressing part 102.

[0044] See Figures 4 to 10, the first punch 10 provided in this embodiment includes a wire head pressing seat 11 and a wire leg pressing seat 12. The wire head pressing seat 11 is arranged on the top plate 3 so as to be movable relative to the wire leg pressing seat 12 along the mold closing direction, or can be fixedly installed on the top plate 3. The wire leg pressing seat 12 is fixedly arranged on the top plate 3. A wire head pressing portion 101 is arranged on the wire head pressing seat 11, and a wire leg pressing portion 102 is arranged on the wire leg pressing seat 12. The second punch 20 is fixedly arranged on the bottom plate 4, and the stop member 30 is movably installed on the bottom plate 4; the upper mold 1 includes a driving member 5 for driving the stop member 30 to move towards the second punch 20 when the upper mold 1 and the lower mold 2 move for mold closing. In this embodiment, one side surface of the first punch 10 away from the top plate 3 has a flat surface. The first punch 10 includes a wire leg pressing seat 12 and a wire head pressing seat 11 which are connected to each other. The flat surface of the wire head pressing portion 101 on the wire head pressing seat 11 is below the flat surface of the wire leg pressing portion 102 on the wire leg pressing seat 12, and after mold closing, the flat surfaces of both the wire head pressing portion 101 and the wire leg pressing portion 102 are on the parting surface. The wire leg pressing seat 12 is fixedly arranged on the top plate 3, the wire head pressing seat 11 is arranged on the top plate 3 and can move relative to the wire leg pressing seat 12 along the mold closing direction, and a compression spring (not shown in the figure) is arranged between the wire head pressing seat 11 and the top plate 3. The driving member 5 includes an inclined block arranged outside the first punch 10, which can press down the stop member 30 during mold closing and drive the stop member 30 to move towards the second punch 20. It is worth mentioning that during mold closing, before the first punch 10 contacts the flat wire 9, the inclined block of the driving member 5 presses down to drive the stop member 30 to move, and the stop member 30 presses the head 92 against the side wall of the wire head forming portion 202. As the upper mold 1 and the lower mold 2 are closed for mold closing, the wire head pressing portion 101 of the first punch 10 presses the head 92 of the flat wire 9 tightly to the bottom of the pressing cavity 2021 and makes the head 92 of the flat wire 9 press into a preset bent shape. At the same time, the wire leg pressing portion 102 presses the leg 91 down along the guiding portion 203 into the fitting groove 2011.

[0045] See Figures 4 to 10 , on the bottom plate 4 provided in this embodiment, a fixing plate 6 and a pressing plate 7 are arranged. The bottom plate 4, the fixing plate 6, and the pressing plate 7 jointly construct an installation space for the movement of the stop member 30. A second elastic member 8 is arranged between the stop member 30 and the fixing plate 6, and the second elastic member 8 is, but not limited to, a compression spring.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bending forming die for bending a flat wire, wherein the flat wire comprises two legs and a head connected to the two legs respectively, characterized in that: The invention comprises an upper die and a lower die having a first punch, wherein the first punch is provided with a wire head pressing part and a wire leg pressing part; the lower die comprises a second punch and a stopper component, wherein the second punch is provided with: A wire leg forming portion having an engaging groove for the wire leg pressing portion to press the leg of the flat wire into; The wire head forming part, together with the stopper, forms a pressing and forming cavity for the wire head pressing part to press the head of the flat wire into and bend and deform the head; as well as A guide portion, used for supporting the leg portion and guiding the leg portion to move into the fitting groove when the wire-leg pressing portion presses down the leg portion; The guide portion is formed on the peripheral side of the wire leg forming portion, and the wire leg pressing portion is provided with an escape opening which is spaced apart from the guide portion.

2. The bending forming die according to claim 1, characterized in that: The guide portion has a guide slope for the leg portion to move, and the guide slope extends downward from a surface of the guide portion and in a direction of the wire leg forming portion to the fitting groove.

3. The bending forming die according to claim 1, characterized in that: A limiting portion is convexly provided on the surface of the guide portion, and the limiting portion is located at a side of the guide portion away from the line leg forming portion.

4. The bending forming die according to any one of claims 1 to 3, characterized in that: The first punch comprises a thread end pressing seat and a thread leg pressing seat, wherein the thread leg pressing seat is fixedly arranged on the top plate, the thread end pressing seat is arranged on the top plate and can move relative to the thread leg pressing seat along the mold closing direction, and a first elastic component is arranged between the thread end pressing seat and the top plate; the thread end pressing portion is arranged on the thread end pressing seat, and the thread leg pressing portion is arranged on the thread leg pressing seat.

5. The bending forming die according to claim 4, characterized in that: The wire head pressing seat is provided with a dovetail groove, and the wire leg pressing seat has a dovetail portion embedded in the dovetail groove.

6. The bending forming die according to claim 4, characterized in that: The wire leg pressing seat is provided with a guide column, and the second punch is provided with a guide sleeve which cooperates with the guide column for guidance.

7. The bending forming die according to claim 4, characterized in that: At least three thread end positioning pins are arranged on the second punch, and the at least three thread end positioning pins are located on the thread end forming portion and are arranged at intervals along the extension direction of the pressed-to-molding cavity.

8. The bending forming die according to any one of claims 1 to 3, characterized in that: The second punch is fixedly arranged on the bottom plate, and the stop component is movably mounted on the bottom plate; the upper die includes a driving component for driving the stop component to move toward the second punch when the upper die and the lower die are moved together.

9. The bending forming die according to claim 8, characterized in that: A fixing plate and a pressing plate are arranged on the bottom plate, and the bottom plate, the fixing plate and the pressing plate together form an installation space for the stop component to move, and a second elastic member is arranged between the stop component and the fixing plate.

10. The bending forming die according to claim 9, characterized in that: The first punch comprises a wire head pressing seat and a wire leg pressing seat, the wire leg pressing seat is fixedly arranged on the top plate, the wire head pressing part is arranged on the wire head pressing seat, and the wire leg pressing part is arranged on the wire leg pressing seat.

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