Forming device and method for special-shaped sheet-shaped contact

Abstract

The special-shaped sheet-shaped contact forming device comprises a driving device, a movable mold frame and a static mold frame, the movable mold frame and the static mold frame are arranged in a cold header in parallel, a first mold, a second-pier forming mold and a final-pier forming mold are arranged on the movable mold frame at intervals, and a pre-pier bottom mold and a final-pier bottom mold are arranged on the static mold frame at intervals. The driving device is used for driving the movable mold frame to reciprocate back and forth and up and down towards the static mold frame, and a head mold needle capable of sliding in the first mold is arranged in the first mold; when the movable mold frame is located at the first position, the first mold is driven by a driving device to do reciprocating motion on the same center with the pre-upsetting bottom mold to be attached to the pre-upsetting bottom mold for mold assembly, so that a pre-upsetting ball is formed by a bar; and the two-upsetting forming die is driven by a driving device to do reciprocating motion on the same center with the pre-upsetting bottom die to be attached and closed, so that the pre-upsetting ball is made into a sheet-shaped contact semi-finished product.

Description

TECHNICAL FIELD

[0001] The present application relates to a forming device and method of a special-shaped sheet contact, and belongs to the field of material processing. BACKGROUND

[0002] The existing special-shaped sheet contact product technical route is: firstly producing a composite strip, then punching and forming the composite strip into a product of a required specification shape through a conventional stamping equipment and a corresponding punching and blanking die, and then removing burrs through surface treatment to obtain the product of the required specification shape. The stamping process needs to develop a corresponding stamping die, the die development is difficult, the die manufacturing cost is high, and the production process of the composite strip is also complex, resulting in high production cost of the product.

[0003] On the other hand, since the above process is based on punching of the strip, the edge and corner material after punching of the strip contains noble metal silver which needs to be recycled twice, resulting in increased energy consumption cost and environmental protection cost. SUMMARY

[0004] The present application aims to overcome the shortcomings and deficiencies of the prior art, and provides a forming device and method of a special-shaped sheet contact, solving the problems of low production efficiency, multiple processes, and high production cost caused by secondary recycling.

[0005] A forming device and method of a special-shaped sheet contact, comprising a driving device, a movable die holder and a stationary die holder which are arranged in parallel in a cold header, a first die, a second die forming die and a final die forming die are arranged at intervals on the movable die holder, a pre-die bottom die and a final die bottom die are arranged at intervals on the stationary die holder, the driving device is used to drive the movable die holder to move back and forth and up and down relative to the stationary die holder, and a first die pin which can slide in the first die is arranged in the first die; when the movable die holder is at a first position, the first die is driven by the driving device to reciprocate up and down with the pre-die bottom die at the same center to fit the die to make the rod material form a pre-header ball, when the movable die holder is at a second position, the second die forming die is driven by the driving device to reciprocate up and down with the pre-die bottom die at the same center to fit the die to make the pre-header ball into a sheet contact semi-finished product, and when the movable die holder is at a third position, the final die forming die reciprocates up and down with the final die bottom die at the same center to fit the die to make the sheet contact semi-finished product into a final special-shaped sheet contact.

[0006] A first forming cavity and a first movable rod are arranged in the second die forming die, the first forming cavity is used to accommodate the pre-header ball and make it into a sheet contact semi-finished product, and the first movable rod is used to drive the sheet contact semi-finished product out of the first forming cavity to the final die bottom die by the driving device.

[0007] The second forming cavity is used for accommodating the sheet-shaped contact semi-product and forming the final special-shaped sheet-shaped contact, and the second movable rod is used for being driven by the driving device to drive the final special-shaped sheet-shaped contact out of the second forming cavity.

[0008] The head die is provided with a spring, and the other end of the spring is in clamped connection with the head die needle sleeve for pushing the head die out of the head die to form the bar material.

[0009] The pre-punch bottom die comprises a first mounting seat and a first movable forming die detachably connected with the first mounting seat, and the final punch bottom die comprises a second mounting seat and a second movable forming die detachably connected with the second mounting seat.

[0010] The first movable forming die and the second movable forming die are both provided with a convexly arranged bottom line for fixing the product.

[0011] The forming device of the special-shaped sheet-shaped contact is processed through any one of the above-mentioned forming devices, comprising the following steps: (1) Step one, the sheared wire material is sent between the head die and the pre-punch bottom die; (2) Step two, the movable die frame is driven by the driving device to make the head die close to the top of the pre-punch bottom die, at this time the head die needle compresses the spring to retract, and the wire material is extruded and deformed to obtain a corresponding pre-upset ball; (3) Step three, the movable die frame is driven to move away from the static die frame, at this time the head die needle pushes the pre-upset ball out, the pre-upset ball is embedded in the pattern on the pre-punch bottom die and does not fall off, and then the movable die frame is driven to move upwards, so that the second punch forming die and the pre-punch bottom die are on the same horizontal line, and the final punch forming die and the final punch bottom die are on the same horizontal line; (4) Step four, the movable die frame is driven to make the second punch forming die and the pre-punch bottom die fit, and the final punch forming die and the final punch bottom die fit, so that the pre-upset ball is punched into a sheet-shaped contact preliminary product, then the movable die frame is driven to move away from the static die frame, and the second punch forming die with the sheet-shaped contact preliminary product moves away from the pre-punch bottom die; (5) Step five, the movable die frame is driven to move upwards, so that the final punch forming die and the pre-punch bottom die are on the same horizontal line, then the movable die frame is driven to make the final punch forming die and the pre-punch bottom die fit; (6) Step six, the movable die frame is driven to move away from the static die frame, then the movable die frame is driven to move downwards, so that all the dies return to the position of step one, and all the actions of step one are completed, at this time the second punch forming die with the sheet-shaped contact preliminary product is on the same horizontal line with the final punch bottom die; (7) Step seven, the action of step two is completed, at this time the second punch forming die with the sheet-shaped contact preliminary product is close to the final punch bottom die, and the first movable rod of the second punch forming die pushes the sheet-shaped contact semi-product out to punch the bottom surface of the sheet-shaped contact preliminary product, so that the sheet-shaped contact semi-product is formed and tightly adheres to the final punch forming bottom. (8) Step eight, complete the actions of step three. At this time, the pre-pier ball is tightly attached to the pre-pier bottom mold and does not fall off, and the sheet-like contact semi-finished product is tightly attached to the final pier forming bottom mold and does not fall off. (9) Step nine, complete the action of step four. At this time, the final block forming mold and the final block bottom mold are attached to form the sheet contact semi-finished product into the final required irregular sheet contact. While the final block forming mold is moving away from the final block bottom mold with the irregular sheet contact, the second movable rod in the final block forming mold will push the irregular sheet contact out and fall off, completing the demolding, so that the required irregular sheet contact can be obtained at the discharge port. (10) Step 10: Complete the actions in Step 5.

[0012] Steps one to five constitute one cycle, and steps one to ten constitute two cycles, one motion cycle. One motion cycle produces one required irregularly shaped sheet contact. The moving mold frame operates repeatedly and continuously under the action of the driving device to continuously produce the required irregularly shaped sheet contact.

[0013] This invention offers the following advantages: It employs a two-die, three-punch cold heading forming method, which cold-heads the cut wire material, effectively improving material utilization. Furthermore, it can produce irregularly shaped sheet contacts according to requirements without adding extra production steps. Therefore, using this two-die, three-punch cold heading forming method to produce irregularly shaped sheet contacts can effectively improve production efficiency, reduce processes, lower production costs, reduce energy consumption, and enhance market competitiveness. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figures 2-9 This is a flowchart of the process steps of the method of the present invention; Figure 10 This is a schematic diagram of an irregularly shaped sheet-like contact product; Figure 11 This is a schematic diagram of the structure of Example 2.

[0016] In the figure, 1. Moving mold frame; 2. First mold; 21. Outer shell; 22. Sliding channel; 221. Damping arc; 222. Groove; 223. Elastic hole; 23. First mold pin; 231. Main body; 232. Forming part; 24. Spring; 25. Connecting sleeve; 251. Damping protrusion; 3. Second pier forming mold; 31. First forming cavity; 32. First movable rod; 4. Final pier forming mold; 41. Second forming cavity; 42. Second movable rod; 5. Static mold frame; 6. Pre-pier bottom mold; 61. First mounting seat; 62. First movable forming mold; 7. Final pier bottom mold; 71. Second mounting seat; 72. Second movable forming mold. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for illustrating and understanding this invention, and not for limiting the scope of protection of this invention.

[0020] like Figures 1-11 The image shows an embodiment of a forming device for irregularly shaped sheet-like contacts according to the present invention. It includes a driving device, a moving mold frame 1 and a stationary mold frame 5 arranged parallel to each other within a cold heading machine. The moving mold frame 1 is provided with a first-pass mold 2, a second-pass forming mold 3, and a final-pass forming mold 4 spaced apart. The stationary mold frame 5 is provided with a pre-pass bottom mold 6 and a final-pass bottom mold 7 spaced apart. The driving device is used to drive the moving mold frame 1 to reciprocate back and forth and reciprocate up and down towards the stationary mold frame 5. The first-pass mold 2 is provided with a head mold pin 23 that can slide within the first-pass mold 2. The moving mold frame 1... In the first position, the first mold 2 is driven by the driving device to reciprocate and fit together with the pre-drum bottom mold 6 at the same center, so that the bar is formed into a pre-upset ball. In the second position, the moving mold frame 1 is driven by the driving device to reciprocate and fit together with the pre-drum bottom mold 6 at the same center, so that the pre-upset ball is formed into a sheet-like contact semi-finished product. In the third position, the moving mold frame 1 is in the final drum forming mold 4 and the final drum bottom mold 7 reciprocate and fit together at the same center, so that the sheet-like contact semi-finished product is formed into the final irregular sheet-like contact.

[0021] This invention utilizes a cold heading process to directly process irregularly shaped sheet contacts from bar stock, eliminating the need for composite strip fabrication and complex stamping dies. This simplifies the production process and significantly reduces the difficulty and cost of die development. Direct bar forming eliminates strip scrap during stamping, preventing the waste of precious silver and greatly improving raw material utilization. Traditional stamping processes require additional sorting and smelting processes for scrap recycling, which are energy-intensive and polluting. This invention, through cold heading, eliminates the need for scrap recycling, fundamentally reducing energy consumption and environmental costs. By employing a multi-station (first die 2, second forming die 3, final forming die 4) continuous forming structure, precise control of pre-heading, secondary forming, and final forming is achieved, resulting in more stable and consistent thickness, shape, and surface quality of the irregularly shaped sheet contacts.

[0022] The drive unit is a servo drive motor, and the movement of the moving mold frame 1 is controlled by the control circuit. The second forming mold 3 is provided with a first forming cavity 31 and a first movable rod 32. The first forming cavity 31 is used to accommodate the pre-upsetting ball and shape it into a sheet-like contact semi-finished product. The first movable rod 32 is used to be driven by the driving device to push the sheet-like contact semi-finished product out of the first forming cavity 31 to the final forming bottom mold 7.

[0023] This technical solution involves a first forming cavity 31 and a first movable rod 32 within the two-stage forming mold 3. After the pre-forging ball is formed into a sheet-like contact semi-finished product in the first forming cavity 31, the first movable rod 32, under the action of a driving device, ejects the semi-finished product to the final forming mold 7, achieving automatic transfer forming. This structure avoids the offset and damage caused by traditional manual handling or mechanical transfer, further improving production efficiency and product qualification rate. The entire forming process is completed within the cold heading machine. The reciprocating motion of the moving mold frame 1 at different positions enables continuous multi-process processing without manual intervention, significantly improving production cycle time and making it suitable for the large-scale, automated production of irregularly shaped sheet-like contacts.

[0024] The final forming mold 4 is provided with a second forming cavity 41 and a second movable rod 42. The second forming cavity 41 is used to accommodate the sheet-shaped contact semi-finished product and shape it into the final irregular sheet-shaped contact. The second movable rod 42 is used to be driven by the driving device to push the final irregular sheet-shaped contact out of the second forming cavity 41 for demolding.

[0025] Through this technical solution, the semi-finished sheet contact product is further precisely pressed into the final irregular sheet contact within the molding cavity, achieving high-precision control over the product shape, thickness, and edge contour, ensuring stable and consistent molding dimensions. The second movable rod 42, driven by the drive device, can automatically eject the molded irregular sheet contact from the second molding cavity 41, achieving automatic demolding. This avoids manual part removal or mechanical clamping operations, improving production cycle time and automation.

[0026] The bottom of the first die 2 is provided with a spring 24, and the other end of the spring 24 is sleeved and engaged with the first die pin 23 to push it out of the first die 2 to form the bar.

[0027] This technical solution involves installing a spring 24 at the bottom of the first die 2, with the other end of the spring 24 engaging with the first die pin 23. After the first die pin 23 is driven to complete the pre-upsetting of the bar, the spring 24 automatically resets the first die pin 23, providing an initial position for the next forming cycle and ensuring the continuity and stability of the forming cycle. The elastic support provided by the spring 24 acts as a buffer and rebound adjuster during the action of the first die pin 23, resulting in a more uniform stress distribution on the bar during deformation. This leads to pre-upset balls with full shapes and stable dimensions, improving product consistency.

[0028] The pre-pier bottom mold 6 includes a first mounting base 61 and a first movable forming mold 62 detachably connected to the first mounting base 61, and the final pier bottom mold 7 includes a second mounting base 71 and a second movable forming mold 72 detachably connected to the second mounting base 71.

[0029] This technical solution utilizes a detachable connection structure between the pre-pier bottom mold 6 and the final pier bottom mold 7, where the mounting base and the movable forming mold are connected. When product specifications or shapes change, only the corresponding movable forming mold needs to be replaced, eliminating the need to replace the entire mold base and significantly reducing mold change time. The detachable structure also makes mold maintenance and local repairs more convenient. When local wear or damage occurs, only the movable mold portion needs to be replaced, avoiding the scrapping of the entire mold set and significantly reducing maintenance and replacement costs.

[0030] Both the first movable forming mold 62 and the second movable forming mold 72 are provided with protruding patterns for fixing the product.

[0031] This technical solution utilizes raised patterns on the first and second movable forming dies 62 to create a micro-friction fit at the product forming contact surface. This effectively limits the blank's position during the upsetting process, preventing slippage or displacement and ensuring accurate forming. The patterns can then be smoothed out during subsequent product processing.

[0032] The difference between this embodiment and the above embodiments is that, see [link to previous embodiment]. Figure 1 and 11To prevent the head mold pin 23 inside the first mold 2 from jamming during prolonged use, the head mold pin 23 is equipped with an anti-jamming structure. The first mold 2 includes a shell 21, and a sliding channel 22 is provided inside the shell 21. The head mold pin 23 is slidably installed inside the first mold 2. The head mold pin 23 includes a main body 231 and a forming part 232 located at the bottom of the main body 231. A connecting sleeve 25 is provided outside the forming part 232, and a plurality of damping protrusions are spaced apart on the outside of the connecting sleeve 25. The sliding channel 22 has a continuous damping arc 221 on its inner wall, and a groove 222 is formed between the continuous damping arcs 221. The damping protrusion 251 cooperates with the groove 222 to prevent the connecting sleeve 25 from sliding with the head die needle 23 under normal conditions. When the head die needle 23 is bent or corroded and jammed with the connecting sleeve 25, the damping protrusion 251 overcomes the damping force of the damping protrusion 251 and the groove 222, so that the connecting sleeve 25 slides with the head die needle 23.

[0033] Each damping arc 221 has an elastic hole 223 inside. When the head mold needle 23 is bent or jammed with the connecting sleeve 25, the damping protrusion 251 causes the damping arc 221 to deform inward through the elastic hole 223, thereby causing the connecting sleeve 25 to slide with the head mold needle 23.

[0034] The damping arc 221 is made of elastic material, which facilitates the deformation of the damping arc 221.

[0035] The process of forming any of the above-mentioned irregular sheet-like contacts using a forming device includes the following steps: (1) Step 1: Send the cut wire material between the first formwork 2 and the pre-pier bottom formwork 6, such as... Figure 1 ; (2) Step two: Drive the moving mold frame 1 through the driving device so that the first mold 2 is close to the top of the pre-upsetting bottom mold 6. At this time, the head mold pin 23 in the first mold 2 compresses the spring 24 and retracts, extruding and deforming the wire material to obtain the corresponding pre-upsetting ball, such as Figure 2 ; (3) Step three: Drive the moving mold frame 1 away from the stationary mold frame 5. At this time, the head mold pin 23 will push out the pre-upsetting ball. The pre-upsetting ball will not fall off because it is fitted by the pattern on the pre-upsetting bottom mold 6. Then drive the moving mold frame 1 to move upward so that the second upsetting mold and the pre-upsetting bottom mold 6 are on the same horizontal line, and the final upsetting mold 4 and the final upsetting bottom mold 7 are on the same horizontal line. Figure 3 ; (4) Step four: Drive the moving mold frame 1 to make the second pier forming mold fit with the pre-pier bottom mold 6 and the final pier forming mold 4 fit with the final pier bottom mold 7, forming the pre-pier spherical pier into a sheet-like contact preliminary product. Then drive the moving mold frame 1 away from the stationary mold frame 5, and the second pier forming mold, carrying the sheet-like contact preliminary product, away from the pre-pier bottom mold 6, as shown. Figure 4 ; (5) Step five: Drive the moving mold frame 1 upward so that the final pier forming mold 4 and the pre-pier bottom mold 6 are on the same horizontal line. Then drive the moving mold frame 1 to make the final pier forming mold 4 fit with the pre-pier bottom mold 6, as shown. Figure 5 ; (6) Step six: Drive the moving mold frame 1 away from the stationary mold frame 5, and then drive the moving mold frame 1 down to return all molds to the position of step one, thus completing all the actions of step one. At this time, the second forming mold 3 with the sheet-like contact point initial product and the final forming bottom mold 7 are on the same horizontal line, such as Figure 6 ; (7) Step seven: After completing the actions of step two, the two-stage forming mold 3, carrying the sheet-like contact pre-product, is close to the final forming bottom mold 7. The first movable rod 32 of the two-stage forming mold 3 will push out the sheet-like contact semi-finished product, and press the bottom surface of the sheet-like contact pre-product to form the sheet-like contact semi-finished product, which is then closely attached to the final forming bottom mold 7. Figure 7 ; (8) Step eight, complete the actions of step three. At this time, the pre-pier ball is tightly attached to the pre-pier bottom mold 6 and does not fall off, and the sheet-like contact semi-finished product is tightly attached to the final pier forming bottom mold and does not fall off. Figure 8 ; (9) Step nine: After completing the actions of step four, the final forming mold 4 and the final bottom mold 7 are attached, forming the sheet-like contact semi-finished product into the final required irregular sheet-like contact. As the final forming mold 4 moves away from the final bottom mold 7 with the irregular sheet-like contact, the second movable rod 42 inside the final forming mold 4 will push the irregular sheet-like contact out and drop it, completing the demolding, thereby obtaining the required irregular sheet-like contact at the discharge port, such as... Figure 9 ; (10) Step 10: Complete the actions in Step 5.

[0036] Steps one to five constitute one cycle, and steps one to ten constitute two cycles, one motion cycle. One motion cycle produces one required irregularly shaped sheet contact. The moving mold frame 1 operates repeatedly and continuously under the action of the driving device to continuously produce the required irregularly shaped sheet contact.

[0037] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

[0038] While the invention has been described with reference to several specific embodiments, it should be understood that the invention is not limited to the disclosed specific embodiments. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A forming device for forming a profiled sheet contact, characterized by: The device comprises a driving device, a movable die holder and a static die holder arranged in parallel in a cold header, a first die, a second die and a final die are arranged at intervals on the movable die holder, a pre-die bottom die and a final-die bottom die are arranged at intervals on the static die holder, the driving device is used to drive the movable die holder to move back and forth and up and down relative to the static die holder, and a head die pin is arranged in the first die and can slide in the first die.

2. The forming apparatus for the shaped sheet contacts according to claim 1, characterized in that: When the movable die holder is at a first position, the first die is driven by the driving device to reciprocate with the pre-die bottom die at the same center to fit and close the die, so that a bar is formed into a pre-header ball; when the movable die holder is at a second position, the second die is driven by the driving device to reciprocate with the pre-die bottom die at the same center to fit and close the die, so that the pre-header ball is made into a sheet-shaped contact semi-finished product; when the movable die holder is at a third position, the final die and the final-die bottom die reciprocate at the same center to fit and close the die, so that the sheet-shaped contact semi-finished product is made into a final irregular sheet-shaped contact.

3. The forming apparatus for the shaped sheet contacts of claim 1, wherein: The second die is provided with a first forming cavity and a first movable rod, the first forming cavity is used to accommodate the pre-header ball and make it into a sheet-shaped contact semi-finished product, and the first movable rod is used to drive the sheet-shaped contact semi-finished product out of the first forming cavity to the final-die bottom die.

4. The apparatus according to claim 1, wherein: The final die is provided with a second forming cavity and a second movable rod, the second forming cavity is used to accommodate the sheet-shaped contact semi-finished product and make it into a final irregular sheet-shaped contact, and the second movable rod is used to drive the final irregular sheet-shaped contact out of the second forming cavity to be demolded.

5. The apparatus according to claim 1, wherein: The first die is provided with a spring at the bottom, and the other end of the spring is sleeved and clamped with the head die pin to push it out of the first die to form the bar.

6. The apparatus according to claim 5, wherein: The pre-die bottom die comprises a first mounting seat and a first movable forming die detachably connected with the first mounting seat, and the final-die bottom die comprises a second mounting seat and a second movable forming die detachably connected with the second mounting seat.

7. A method of using a forming apparatus for shaped blade contacts, the method comprising: The first movable forming die and the second movable forming die are both provided with a convexly arranged bottom line for fixing the product. The device is processed by the irregular sheet-shaped contact forming device of any one of claims 1-6, comprising the following steps: (1) Step one, the cut wire material is sent between the first die and the pre-die bottom die; (2) Step two, the movable die holder is driven by the driving device to make the first die close to the top of the pre-die bottom die, at this time the head die pin in the first die compresses the spring and retracts to extrude and deform the wire material to obtain a corresponding pre-header ball; (3) Step three, the movable die holder is driven away from the static die holder, at this time the head die pin pushes out the pre-header ball, the pre-header ball is embedded in the pattern on the pre-die bottom die and does not fall off, and then the movable die holder is driven to move upwards, so that the second die and the pre-die bottom die are on the same horizontal line, and the final die and the final-die bottom die are on the same horizontal line; (4) Step four, the movable die holder is driven to make the second die and the pre-die bottom die fit, and the final die and the final-die bottom die fit, so that the pre-header ball is made into a sheet-shaped contact semi-finished product, then the movable die holder is driven away from the static die holder, and the second die with the sheet-shaped contact semi-finished product moves away from the pre-die bottom die; (5) Step five, drive the movable die set to move up, so that the final pier forming die and the pre-pier bottom die are on the same horizontal line, then drive the movable die set so that the final pier forming die and the pre-pier bottom die are in close contact; (6) Step six, drive the movable die set away from the fixed die set, then drive the movable die set to move down, so that all the molds return to the position of step one, and all the actions of step one are completed, at this time the two-pier forming die with the sheet-shaped contact preliminary product and the final pier bottom die are on the same horizontal line; (7) Step seven, complete the action of step two, at this time the two-pier forming die with the sheet-shaped contact preliminary product and the final pier bottom die are in close contact, the first movable rod of the two-pier forming die will push out the sheet-shaped contact semi-finished product, and the bottom surface of the sheet-shaped contact preliminary product is pitted to form the sheet-shaped contact semi-finished product and tightly adhere to the final pier forming bottom; (8) Step eight, complete the action of step three, at this time the pre-pier ball tightly adheres to the pre-pier bottom die and does not fall off, and the sheet-shaped contact semi-finished product tightly adheres to the final pier forming bottom die and does not fall off; (9) Step nine, complete the action of step four, at this time the final pier forming die and the final pier bottom die are in close contact, the sheet-shaped contact semi-finished product is pitted to form the final required special-shaped sheet-shaped contact, while the final pier forming die with the special-shaped sheet-shaped contact moves away from the final pier bottom die, the second movable rod in the final pier forming die will push out the special-shaped sheet-shaped contact and fall off, completing the demolding, so that the required special-shaped sheet-shaped contact is obtained at the discharge port; (10) Step ten, complete the action of step five.

8. The method of using the apparatus for forming a profiled sheet contact as defined in claim 7, wherein: The steps one to five are a cycle, the steps one to ten are two cycles, one motion cycle, one motion cycle produces one required special-shaped sheet-shaped contact, and the movable die set is repeatedly and continuously operated under the action of the driving device to continuously produce the required special-shaped sheet-shaped contact.

Images