Cold extrusion forming die for conductive contact pin

Abstract

The utility model discloses a cold extrusion forming die for a conductive contact pin, belongs to the technical field of cold extrusion forming dies, and solves the problem of short service life of a lower die ejector core in the existing cold extrusion forming die due to high pressure borne by the bottom of the lower die ejector core. The cold extrusion die comprises an upper die base and a lower die base, and a cold extrusion punch assembly used for extruding a conductive contact pin is fixed to the bottom of the upper die base; a lower die plate is fixed on the lower die base, a forming hole used for containing the conductive contact pin is formed in the middle of the lower die plate, a lower die ejector core is arranged in the forming hole, and a material taking sliding block used for ejecting the conductive contact pin out of the lower die plate is arranged on the lower die ejector core in a sleeved mode. According to the utility model, the cold extrusion punch assembly and the lower die top core are matched to carry out cold extrusion forming on the conductive contact pin, so that the processing speed is high and the production efficiency is high; and the material taking sliding block arranged on the lower die ejector core in a sleeving mode is ejected upwards through the lower die ejector rod, so that material taking is convenient, meanwhile, the contact area between the lower die ejector core and the lower die plate is not reduced, and the service life of the lower die ejector core is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cold extrusion forming dies, in particular to a cold extrusion forming die for a conductive plug pin. Background Art

[0002] With the development of new energy vehicles, the demand for car charging guns has increased, and charging guns are equipped with multiple conductive pins. Conductive pins are often manufactured by cold extrusion.

[0003] Cold extrusion is to apply high pressure to the metal blank at room temperature to deform it through the die, thereby forming the desired conductive pin shape. The advantages of cold extrusion are high material strength, high dimensional accuracy, good surface quality, and the ability to maintain the original conductive properties of the material. In addition, since no heating is required, the production efficiency is relatively high and the energy consumption is low. In the prior art, in order to facilitate the removal of parts after cold extrusion, a push rod is provided at the bottom center of the lower die top core, and the push rod pushes the lower die top core upward to eject the parts, thereby reducing the contact area between the lower die top core and the lower die seat, so that the lower die top core will be subjected to greater pressure, reducing the service life of the lower die top core.

[0004] For example, a cold extrusion forming mold device for copper shell parts with the existing publication number CN216679597U includes an upper template, a punch, a lower template, a die, and an ejection mechanism. An upper pad and a punch pressure plate are arranged in sequence below the upper template, and a punch is sleeved in the punch pressure plate. A reinforcing ring is arranged above the lower pad on the lower template, and a die and a die seat are sleeved in the center of the reinforcing ring. An ejection mechanism is sleeved in the center of the lower template. The ejection mechanism includes a push rod, a material push rod and a lower push rod. The upper end of the push rod is butt-jointed with the push rod, and the lower end is sleeved with a spring. The lower push rod is installed on the pull rod. At the same time, the pull rods on both sides of the pull plate pass through the lower template and the lower pad and then dock with the upper template.

[0005] Although the utility model can automatically eject and facilitate material removal, the bottom of the ejector rod is connected to the push rod but not to the lower template, so that the bottom of the ejector rod will be subjected to greater pressure, which reduces the service life of the ejector rod. Utility Model Content

[0006] In view of the above problems in the prior art, the utility model provides a cold extrusion forming die for a conductive pin, which solves the problem that the top core of the lower die in the existing cold extrusion forming die has a short service life due to the strong pressure on the bottom.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A cold extrusion forming die for a conductive pin is provided, characterized in that it comprises an upper die base and a lower die base, the upper die base and the lower die base are respectively arranged at the upper end and the lower end of the guide rod assembly, a cold extrusion punch assembly for extruding the conductive pin is fixed to the bottom of the upper die base; a lower mold plate is fixed to the lower die base, a forming hole for accommodating the conductive pin is opened in the middle of the lower mold plate, a lower mold top core is arranged in the forming hole, the bottom of the lower mold top core is fixed to the lower die base, a material taking slider for ejecting the conductive pin out of the lower mold plate is sleeved on the lower mold top core, a plurality of support rods are arranged on the bottom of the material taking slider, the other ends of the plurality of support rods pass through the lower die base and are fixedly connected to the top surface of the lower mold top rod, and the lower mold top rod is used to vertically push the material taking slider to move upward in the forming hole.

[0009] In this solution, the conductive pin is formed by cold extrusion of a cold extrusion punch assembly and a lower die top core, with fast processing speed and high production efficiency; and the material removal slider sleeved on the lower die top core is pushed upward by the lower die ejector rod, which makes it easy to remove materials without reducing the contact area between the lower die top core and the lower mold plate, thereby ensuring the service life of the lower die top core.

[0010] Furthermore, the material-retrieving slide block is in the shape of a stepped cylinder with a hollow interior, and a stepped cylinder is arranged at the bottom of the material-retrieving slide block, and the bottom surface of the stepped cylinder is fixedly connected to a plurality of support rods in the circumferential direction. The arrangement of the stepped cylinder facilitates the fixed connection with the plurality of support rods.

[0011] Furthermore, a forming block is provided in the middle of the lower template, a forming hole is provided through the middle of the forming block, a pad located inside the lower template is provided at the bottom of the forming block, and the stepped cylinder of the material-retrieving slider is slidably provided in the center hole of the pad block. The diameter of the center hole of the pad block is larger than the diameter of the forming hole. The pad block not only supports and lifts the forming block, but also provides a sliding channel for the material-retrieving slider.

[0012] Furthermore, the bottom diameter of the lower mold top core is larger than the top diameter of the lower mold top core. Setting the bottom diameter of the lower mold top core in this way not only improves the strength of the lower mold top core, but also increases the contact area between the bottom surface of the lower mold top core and the lower mold plate, thereby reducing the pressure on the bottom surface of the lower mold top core.

[0013] Furthermore, the top of the lower mold top core is conical, so that the top shape of the lower mold top core adapts to the internal shape of the conductive pin.

[0014] Furthermore, a plurality of through holes are provided on the top surface of the lower die seat along the circumferential direction of the lower die top core, and the plurality of through holes are in one-to-one correspondence with the plurality of support rods, and the middle portion of each support rod is slidably disposed in each through hole. The plurality of through holes are disposed on the top surface of the lower die seat in the circumferential direction of the upper and lower die top cores, so that the force on the bottom of the material taking slide block is more uniform.

[0015] Furthermore, a lower support plate is fixed to the bottom of the lower die seat, and the four sides of the lower support plate are fixedly connected to the guide rod assembly, and a sliding hole extending to the interior of the lower die plate is opened at the center of the bottom surface of the lower support plate, and the top surface of the sliding hole is respectively connected to a plurality of through holes, and a lower die ejector rod is slidably arranged inside the sliding hole. The sliding hole limits the sliding direction of the lower die ejector rod.

[0016] Furthermore, the cold extrusion punch assembly includes a fixed plate fixed on the bottom of the upper die base, the bottom of the fixed plate is fixedly connected to the fixed block, a cold extrusion punch is arranged in the middle of the fixed block, the top of the cold extrusion punch passes through the fixed block and is fixedly connected to the fixed plate, and the axis of the cold extrusion punch coincides with the axis of the forming hole.

[0017] Furthermore, the bottom end of the cold extrusion punch is provided with an opening, and a U-shaped sink groove is provided through the bottom opening of the cold extrusion punch. The setting of the sink groove can process the conductive sheet on the conductive pin.

[0018] Furthermore, an upper ejector core is sleeved on the cold extrusion punch, and the upper ejector core is fixed at the middle part of the upper stripping plate.

[0019] The utility model discloses a cold extrusion forming die for a conductive pin, which has the following beneficial effects:

[0020] The utility model realizes cold extrusion forming of the conductive pin by the cooperation of the cold extrusion punch assembly and the lower die top core, with fast processing speed and high production efficiency; and the material taking slide block sleeved on the lower die top core is pushed upward by the lower die top rod, so that the material taking is convenient, and the contact area between the lower die top core and the lower template is not reduced, thereby ensuring the service life of the lower die top core. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic diagram of a cold extrusion forming die for a conductive pin;

[0022] Figure 2 This is the front view of the cold extrusion punch;

[0023] Figure 3 It is the front view of the material taking slide block;

[0024] Figure 4 is a front view of a conductive pin;

[0025] Figure 5 It is a right side view of the conductive pin;

[0026] Among them: 1. upper die seat; 2. cold extrusion punch assembly; 21. fixed plate; 22. upper pad; 23. fixed block; 24. cold extrusion punch; 25. upper ejector core; 26. upper stripping plate; 3. lower template; 31. forming block; 311. forming hole; 32. pad; 4. lower die ejector core; 5. material removal slider; 51. stepped cylinder; 52. support rod; 6. lower pad; 7. lower die seat; 8. lower support plate; 9. lower die ejector rod; 10. guide rod assembly; 11. conductive pin; 111. conductive sheet. DETAILED DESCRIPTION

[0027] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0028] refer to Figure 1 The present embodiment provides a cold extrusion forming die for a conductive pin, which is used for extrusion forming of a conductive pin 11, and includes an upper die base 1 and a lower die base 7, which are respectively arranged at the upper end and the lower end of a guide rod assembly 10; a cold extrusion punch assembly 2 for extruding the conductive pin 11 is fixed to the bottom of the upper die base 1; a lower die plate 3 is fixed to the lower die base 7, a forming hole 311 for accommodating the conductive pin 11 is opened in the middle of the lower die plate 3, and a lower die top core 4 is arranged in the forming hole 311.

[0029] In this embodiment, the guide rod assembly 10 includes a plurality of guide rods arranged in a circumferential direction, the upper die seat 1 slides on the top ends of the plurality of guide rods, and the lower die seat 7 is fixed on the bottom ends of the plurality of guide rods. During the processing, the worker places the conductive pin blank on the lower die top core 4 in the forming hole 311, and drives the upper die seat 1 downward through the cold extrusion equipment. The upper die seat 1 drives the cold extrusion punch assembly 2 downward to cooperate with the lower die top core 4 to cold extrude the conductive pin blank. The conductive pin blank is cold extruded by the cold extrusion punch assembly 2 and the lower die top core 4, and the processing speed is fast and the production efficiency is high;

[0030] The bottom of the lower mold top core 4 is fixed on the lower mold base 7. The lower mold top core 4 is sleeved with a material picking slider 5 for ejecting the conductive pin 11 out of the lower mold plate 3. A plurality of support rods 52 are arranged on the bottom of the material picking slider 5. The other ends of the plurality of support rods 52 pass through the lower mold base 7 and are fixedly connected to the top surface of the lower mold push rod 9. The lower mold push rod 9 is used to vertically push the material picking slider 5 to move upward in the forming hole 311.

[0031] In this embodiment, the material removal slider 5 mounted on the lower mold top core 4 is pushed upward by the lower mold push rod 9, which facilitates material removal without reducing the contact area between the lower mold top core 4 and the lower mold plate 3, thereby ensuring the service life of the lower mold top core 4.

[0032] Preferably, reference Figure 3 The material-retrieving slide block 5 is in the shape of a stepped cylinder with a hollow interior. The front view of the material-retrieving slide block 5 is in a T-shape. A stepped cylinder 51 is provided at the bottom of the material-retrieving slide block 5. The bottom surface of the stepped cylinder 51 is fixedly connected to a plurality of support rods 52 in the circumferential direction. The stepped cylinder 51 is arranged to facilitate fixed connection with the plurality of support rods 52.

[0033] Specifically, the cold extrusion punch assembly 2 includes a fixed plate 21 fixed on the bottom of the upper die base 1, the bottom of the fixed plate 21 is fixedly connected to the fixed block 23, a cold extrusion punch 24 is arranged in the middle of the fixed block 23, the top of the cold extrusion punch 24 passes through the fixed block 23 and is fixedly connected to the upper pad 22 in the fixed plate 21, and the axis of the cold extrusion punch 24 coincides with the axis of the forming hole 311. An upper top core 25 is sleeved on the cold extrusion punch 24, and the upper top core 25 is fixed in the middle of the upper stripping plate 26.

[0034] Specifically, a forming block 31 is provided in the middle of the lower template 3, a forming hole 311 is provided through the middle of the forming block 31, a cushion block 32 located inside the lower template 3 is provided at the bottom of the forming block 31, and the step cylinder 51 of the material-retrieving slider 5 is slidably arranged in the center hole of the cushion block 32, and the diameter of the center hole of the cushion block 32 is larger than the diameter of the forming hole 311. The cushion block 32 not only supports and elevates the forming block 31, but also provides a sliding channel for the material-retrieving slider 5.

[0035] Preferably, the bottom diameter of the lower mold top core 4 is larger than the top diameter of the lower mold top core 4. By setting the bottom diameter of the lower mold top core 4 in this way, the strength of the lower mold top core 4 is improved, the contact area between the bottom surface of the lower mold top core 4 and the lower mold plate 3 is increased, and the pressure on the bottom surface of the lower mold top core 4 is reduced.

[0036] As a further solution of this embodiment, a plurality of through holes are provided on the top surface of the lower die seat 7 along the circumferential direction of the lower die top core 4, and the plurality of through holes are in one-to-one correspondence with the plurality of support rods 52, and the middle portion of each support rod 52 is slidably disposed in each through hole. The plurality of through holes are disposed on the top surface of the lower die seat 7 in the circumferential direction of the upper and lower die top cores 4, so that the force on the bottom of the material taking slide block 5 is more uniform.

[0037] As a further solution of this embodiment, a lower pad 6 is provided at the bottom of the lower die seat 7, the bottom of the lower pad 6 is fixedly connected to the lower support plate 8, the surrounding of the lower support plate 8 is fixedly connected to the guide rod assembly 10, a sliding hole extending to the inside of the lower mold plate 3 is opened at the center of the bottom surface of the lower support plate 8, the top surface of the sliding hole is respectively connected to a plurality of through holes, and a lower die ejector rod 9 is slidably provided inside the sliding hole. The sliding hole limits the sliding direction of the lower die ejector rod 9.

[0038] refer to Figure 4 and Figure 5 The conductive pin 11 in this embodiment is cylindrical and has an opening at one end. A conical countersunk hole is arranged inside the open end surface of the conductive pin 11, and a rectangular conductive sheet 111 is arranged on the other end of the conductive pin 11.

[0039] In order to extrude the conductive pin 11 in this embodiment, the top of the lower die top core 4 in this embodiment is conical, so that the top shape of the lower die top core 4 adapts to the internal shape of the conductive pin 11 .

[0040] refer to Figure 2 The bottom end of the cold extrusion punch 24 is open, and a U-shaped sink groove is provided through the bottom opening of the cold extrusion punch 24. The setting of the sink groove can process the conductive sheet 111 on the conductive pin 11.

[0041] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A cold extrusion forming die for a conductive pin, characterized in that: It comprises an upper die base (1) and a lower die base (7), wherein the upper die base (1) and the lower die base (7) are respectively arranged at the upper end and the lower end of the guide rod assembly (10), and a cold extrusion punch assembly (2) for extruding conductive pins is fixed at the bottom of the upper die base (1); A lower mold plate (3) is fixed on the lower mold base (7), a forming hole (311) for accommodating a conductive pin is provided in the middle of the lower mold plate (3), a lower mold top core (4) is arranged in the forming hole (311), the bottom of the lower mold top core (4) is fixed on the lower mold base (7), a material taking slider (5) for ejecting the conductive pin (11) from the lower mold plate (3) is sleeved on the lower mold top core (4), a plurality of support rods (52) are arranged on the bottom of the material taking slider (5), the other ends of the plurality of support rods (52) pass through the lower mold base (7) and are fixedly connected to the top surface of the lower mold top rod (9), and the lower mold top rod (9) is used to vertically push the material taking slider (5) to move upward in the forming hole (311).

2. The cold extrusion forming die for the conductive pin according to claim 1, characterized in that: The material picking slide block (5) is in the shape of a stepped cylinder with a hollow interior. A stepped cylinder (51) is provided at the bottom of the material picking slide block (5). The bottom surface of the stepped cylinder (51) is fixedly connected to a plurality of support rods (52) in a circumferential direction.

3. The cold extrusion forming die for the conductive pin according to claim 2, characterized in that: A forming block (31) is arranged in the middle of the lower template (3), the forming hole (311) is arranged through the middle of the forming block (31), a cushion block (32) located inside the lower template (3) is arranged at the bottom of the forming block (31), and the stepped cylinder (51) of the material taking sliding block (5) is slidably arranged in the center hole of the cushion block (32).

4. The cold extrusion forming die for the conductive pin according to claim 1, characterized in that: The bottom diameter of the lower mold top core (4) is greater than the top diameter of the lower mold top core (4).

5. The cold extrusion forming die for the conductive pin according to claim 1, characterized in that: The top of the lower mold top core (4) is conical.

6. The cold extrusion forming die for the conductive pin according to claim 1, characterized in that: A plurality of through holes are provided on the top surface of the lower die seat (7) along the circumferential direction of the lower die top core (4), the plurality of through holes being in a one-to-one correspondence with the plurality of support rods (52), and the middle portion of each support rod (52) is slidably disposed in each through hole.

7. The cold extrusion forming die for the conductive pin according to claim 6, characterized in that: A lower supporting plate (8) is fixed at the bottom of the lower die base (7), and the four sides of the lower supporting plate (8) are fixedly connected to the guide rod assembly (10). A sliding hole extending to the interior of the lower mold plate (3) is opened at the center of the bottom surface of the lower supporting plate (8), and the top surface of the sliding hole is respectively connected to the plurality of through holes, and a lower die ejector rod (9) is slidably arranged inside the sliding hole.

8. The cold extrusion forming die for the conductive pin according to claim 1, characterized in that: The cold extrusion punch assembly (2) comprises a fixing plate (21) fixed on the bottom of the upper die base (1); the bottom of the fixing plate (21) is fixedly connected to a fixing block (23); a cold extrusion punch (24) is arranged in the middle of the fixing block (23); the top of the cold extrusion punch (24) passes through the fixing block (23) and is fixedly connected to the fixing plate (21); the axis of the cold extrusion punch (24) coincides with the axis of the forming hole (311).

9. The cold extrusion forming die for the conductive pin according to claim 8, characterized in that: The bottom end of the cold extrusion punch (24) is provided with an opening, and a U-shaped sink groove is provided through the bottom opening of the cold extrusion punch (24).

10. The cold extrusion forming die for the conductive pin according to claim 8, characterized in that: An upper push core (25) is sleeved on the cold extrusion punch (24), and the upper push core (25) is fixed to the middle part of the upper stripping plate (26).

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