A high-efficiency high-pressure forming punch for fasteners

Abstract

The present invention discloses a high-efficiency high-pressure forming punch for fasteners, including a limiting mold for limiting the position of the fasteners and a punch body for punching the fasteners, wherein the limiting mold is provided with an internal support part for supporting, and the outside of the punch body is also provided with an external support part for processing the fasteners, wherein the internal support part includes: a slide plate 1, which is slidably arranged inside the limiting mold and is used to support the lower end of the fastener; a slide plate 2, which is also slidably arranged inside the limiting mold and is used to support the lateral direction of the fasteners, and the external support part includes. The present invention places the fastener from the head opening, and the extrusion hole cooperates with the head opening and the stem opening, and the fastener is clamped by the lateral movement of the slide plate 2, so that the fastener will not fall off or move out. After the processing is completed, the slide plate 2 is pushed, so that the fastener can be ejected upward under the action of the lower end spring, so that the fastener can be taken out easily.

Description

Technical Field

[0001] The invention relates to the technical field of punches, in particular to a high-efficiency fastener high-pressure forming punch. Background Art

[0002] Punches for fastener forming play a vital role in the fastener manufacturing process. These punches are usually used in conjunction with molds. Through the stamping process, metal or non-metallic materials are plastically deformed in the mold cavity, thereby being processed into fastener products that meet the requirements. In the processing of fasteners, the blank is generally placed in a cold heading machine and processed by the stamping action of the mold. However, the fasteners formed by cold heading are generally smaller in specifications, and bars with a diameter of more than 8mm are generally not formed by cold heading. Therefore, other processing methods are required when manufacturing fasteners with larger diameters. The head and rod of the fastener are processed by turning or milling, and then the head is heat treated. The fastener is clamped on the mold, and finally the punch is used to impact the fastener to produce an inner hexagon. The head of the fastener is softened or easily deformed during the heat treatment. It is clamped in the mold to facilitate the limitation of the head. At the same time, under the impact of the punch, the fastener produces corresponding deformation;

[0003] However, due to the changes in the organization structure and performance of the metal after heat treatment, defects such as scale and rust may appear on the metal surface, which need to be treated before the punching. In addition, as time goes by, the scale and rust defects will gradually increase. They need to be treated before the punching, and the fasteners need to be stamped immediately after treatment. Avoid squeezing the scale and rust defects during stamping, which will also avoid uneven surfaces of the fasteners after stamping. Summary of the invention

[0004] The object of the present invention is to provide a high-efficiency fastener high-pressure forming punch to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an efficient fastener high pressure forming punch, comprising a limiting die for limiting the position of the fastener and a punch body for punching the fastener, wherein the limiting die is provided with an inner support portion for supporting, and the outer side of the punch body is also provided with an outer support portion for processing the fastener, and the inner support portion comprises:

[0006] Slide plate 1, slidably arranged inside the limiting mold, used for supporting the lower end of the fastener;

[0007] The second slide plate is also slidably disposed in the limiting mold and is used to support the fastener laterally. The outer support portion includes:

[0008] A rod assembly connected to the punch body and deformed when the punch body moves;

[0009] A cleaning rod body is arranged at the end of the rod body assembly and is used to process the stamping surface of the fastener;

[0010] The lower end of the punch body is polygonal, the fastener is limited in the limiting mold, and the punch body and the fastener are located on the same axis.

[0011] Furthermore, the outer ends of the limiting mold are respectively provided with a side opening 1 and a side opening 2, and the slide plate 1 and the slide plate 2 slide in the side opening 1 and the side opening 2 respectively;

[0012] The upper end of the limiting mold is provided with a head opening extending downward to the second side opening, and the limiting mold is provided with a stem opening extending from the second side opening to the first side opening. The head of the fastener is clamped in the head opening, and the stem is clamped in the stem opening. The lower end of the fastener is supported on the first slide plate, and the upper end of the fastener is flush with the limiting mold.

[0013] The diameter of the head opening is greater than the diameter of the stem opening.

[0014] Furthermore, the second slide plate is provided with an extrusion hole from top to bottom, the extrusion hole has the same diameter as the rod opening, and the fastener head is supported at the upper end of the extrusion hole;

[0015] The slide plate 2 is also provided with a through hole, which is located in the opposite direction of the movement of the extrusion hole and is used to remove the generated impurities;

[0016] A box body is also fixed on the outer side of the limiting mold, a return spring is fixed in the box body, and the outer end of the return spring is fixed to the second slide plate.

[0017] Furthermore, the upper end of the slide plate 1 is provided with a longitudinal opening with a spring inside, the longitudinal opening is supported at the lower end of the fastener, and the diameter of the longitudinal opening is smaller than the fastener, and the spring inside is used to bounce the fastener upward;

[0018] The upper end of the slide plate 1 is also provided with a non-penetrating receiving cavity, and when the slide plate 1 moves, the impurities slide into the receiving cavity.

[0019] Furthermore, the upper end of the limiting mold is also provided with a transversely arranged slot and a rectangular thin opening on the upper end surface, and the fastener is located in the rectangular thin opening;

[0020] The rod assembly includes a support rod 1, two support rods 2, a support rod 3 and two support rods 4, the support rod 1 is fixed to the outside of the punch body, the two support rods 2 are arranged horizontally and one end of each support rod is fixed to the support rod 1, the support rod 3 is rotatably installed between the two support rods 2, and torsion springs are installed at the ends of the two support rods 4 and the two support rods 4 are fixedly arranged with the support rod 3, the cleaning rod body is rotatably installed between the two support rods 4, and the lower end of the cleaning rod body is pressed against the inner wall of the rectangular thin opening;

[0021] The support rod 2 and the support rod 4 are arranged at an acute angle, the support rod 2 is arranged horizontally, a servo motor is arranged at the end of the cleaning rod body, and the servo motor is slidably clamped in the clamping groove.

[0022] Furthermore, the cleaning rod body includes a rotating shaft and an outer blade on its outer wall, the outer blade is fixedly arranged with the rotating shaft, the outer blade is used to clean the oxide scale, and the end of the rotating shaft is fixed with the output end of the servo motor.

[0023] Furthermore, the outer blade is in an arc shape, and the end in the rotation direction is a blade point. The outer side surface of the outer blade is a blade edge. The blade edge is in a rough arc shape. The axis of the blade edge coincides with the axis of the rotating shaft. When rotating, the blade point and the blade edge of the outer blade are squeezed against the inner wall of the rectangular thin opening.

[0024] Furthermore, the rotating shaft and the outer edges on its outer wall are both made of steel.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention places the fastener from the head opening, the extrusion hole cooperates with the head opening and the stem opening, the fastener is clamped by the lateral movement of the second slide plate, and the fastener is kept from falling off or moving out. After the processing is completed, the second slide plate is pushed, so that the fastener can be ejected upward under the action of the lower end spring, so that the fastener is easy to take out;

[0026] The fastener will drop oxide scale downwards, pull out the second slide plate, and then pull out the first slide plate outwards, so that the oxide scale inside the rod mouth moves to the receiving cavity for collection, so as to avoid affecting the subsequent processing and prevent marks from being produced on the surface of the subsequent extruded limiter;

[0027] The rod assembly is bent, and the cleaning rod moves horizontally along the limiting mold, and the upper end surface of the fastener limited in the limiting mold is cleaned; first, the punch body moves downward, first the blade point contacts the upper end of the fastener head, and then the blade edge is squeezed. The blade point can pick up the residual oxide belt, and the blade edge is polished to keep the upper end of the fastener head clean to the greatest extent; second, the punch body moves upward, first contacting the upper end of the fastener head from top to bottom, even if the fastener head produces local deformation, it can avoid affecting the movement of the cleaning rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the local explosion structure of the limiting mold of the present invention;

[0031] Figure 3 It is a schematic diagram of a half-section structure of the limiting mold of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the external support part of the present invention;

[0033] Figure 5 It is a schematic diagram of the cross-sectional structure of the cleaning rod body of the present invention;

[0034] Figure 6 It is another cross-sectional structural schematic diagram of the cleaning rod body movement of the present invention.

[0035] In the figure: 1. limit mold; 11. side opening 1; 12. side opening 2; 13. slot; 14. rectangular thin opening; 15. head opening; 16. rod opening; 2. punch body; 3. inner support part; 31. slide plate 1; 311. receiving cavity; 312. longitudinal opening; 32. slide plate 2; 321. extrusion hole; 322. through opening; 323. box body; 324. reset spring; 4. outer support part; 41. support rod 1; 42. support rod 2; 43. support rod 3; 44. support rod 4; 45. servo motor; 46. cleaning rod body; 461. rotating shaft; 462. outer blade; 463. blade point; 464. blade edge. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-6 The present invention provides a technical solution: an efficient fastener high-pressure forming punch, comprising a limiting die 1 for limiting the position of the fastener and a punch body 2 for punching the fastener, the limiting die 1 is provided with an inner support part 3 for supporting, the outer side of the punch body 2 is also provided with an outer support part 4 for processing the fastener, and the inner support part 3 includes:

[0038] A slide plate 31 is slidably disposed inside the limiting mold 1 and is used to support the lower end of the fastener;

[0039] The second slide plate 32 is also slidably disposed in the limiting mold 1 for lateral support of the fastener. The outer support portion 4 includes:

[0040] The rod assembly is connected to the punch body 2 and deforms when the punch body 2 moves;

[0041] A cleaning rod 46 is provided at the end of the rod assembly and is used for processing the stamping surface of the fastener;

[0042] The lower end of the punch body 2 is polygonal, the fastener is limited in the limiting mold 1, and the punch body 2 and the fastener are located on the same axis.

[0043] like Figure 2 As shown, the outer ends of the limiting mold 1 are respectively provided with a side opening 11 and a side opening 2 12, and the slide plate 1 31 and the slide plate 2 32 slide in the side opening 11 and the side opening 2 12 respectively;

[0044] The upper end of the limiting mold 1 is provided with a head opening 15 extending downward to the second side opening 12, and the limiting mold 1 is provided with a stem opening 16 extending from the second side opening 12 to the first side opening 11. The head of the fastener is clamped into the head opening 15, and the stem is clamped into the stem opening 16. The lower end of the fastener is supported on the slide plate 1 31, and the upper end of the fastener is flush with the limiting mold 1.

[0045] It should be noted that the head opening 15 and the stem opening 16 are used to limit the fastener, so that when the fastener is limited from top to bottom, its entire body is in a surrounded state, and even if it is squeezed downward, the position of the entire body is supported to avoid movement or deformation;

[0046] The diameter of the head opening 15 is greater than the diameter of the stem opening 16 , so that the position of the fastener is maintained. At the same time, the head opening 15 is used to limit the head of the fastener, and the stem opening 16 is used to limit the stem of the fastener.

[0047] The second slide plate 32 is provided with an extrusion hole 321 from top to bottom, and the extrusion hole 321 has the same diameter as the rod opening 16. The head of the fastener is supported at the upper end of the extrusion hole 321, and the lower end face of the head of the fastener is also supported. The surroundings and the lower end of the head after heat treatment are limited to keep the fastener from deforming. Even if deformation occurs, it is deformed upward. The limited fastener is a hexagon socket bolt, so that when the head of the hexagon socket bolt is punched by the punch body 2, it can only be deformed upward. Under the effect of pressure, the lower end and the surrounding of the hexagon socket bolt head are squeezed, but no deformation occurs, and a cavity is generated at the upper end of the hexagon socket bolt after extrusion;

[0048] The second slide plate 32 is also provided with a through hole 322, which is located in the opposite direction of the movement of the extrusion hole 321, and is used to remove the generated impurities. When the second slide plate 32 moves horizontally, the impurities located in the head opening 15 are moved out from the through hole 322;

[0049] A box body 323 is also fixed to the outside of the limiting mold 1, and a return spring 324 is fixed inside the box body 323, and the outer end of the return spring 324 is fixed to the slide plate 32. After the fastener is installed, the fastener can be pushed outward laterally under the action of the return spring 324. However, since the fastener is limited by the head opening 15 and the rod opening 16, it will not be deformed even if it is pushed by the slide plate 32.

[0050] The upper end of the slide plate 31 is provided with a longitudinal opening 312 with a spring inside. The longitudinal opening 312 is supported at the lower end of the fastener, and the diameter of the longitudinal opening 312 is smaller than the fastener. The internal spring is used to bounce the fastener upward. Under the action of the return spring 324, the fastener is squeezed laterally to keep the position of the fastener stationary. Even if the lower end has a spring to push upward, the position of the fastener is still kept stationary. After pushing the slide plate 2 and counteracting the force of the return spring 324, the spring at the lower end can push the fastener upward. When the punch body 2 impacts, even if the fastener is in a state of being pushed upward, the downward movement of the punch body 2 can compress the spring at the lower end and limit the fastener in the limiting mold 1.

[0051] The upper end of the slide plate 31 is also provided with a non-through receiving cavity 311. When the slide plate 31 moves, the impurities slide into the receiving cavity 311. Moving the slide plate 31 horizontally can move the impurities in the rod opening 16 to the receiving cavity 311 for cleaning.

[0052] The upper end of the limiting mold 1 is also provided with a transversely arranged slot 13 and a rectangular thin opening 14 located on the upper end surface. The fastener is located in the rectangular thin opening 14, so that the upper end of the fastener is slightly higher than the inner wall of the rectangular thin opening 14. When the cleaning rod body 46 moves transversely, it moves along the rectangular thin opening 14. When it contacts the fastener, it moves to the upper end of the fastener and separates from the inner wall of the rectangular thin opening 14, ensuring that it is squeezed with the upper end of the fastener to scrape off the oxide scale.

[0053] The rod assembly includes a support rod 1 41, two support rods 2 42, a support rod 3 43 and two support rods 44, the support rod 1 41 is fixed to the outside of the punch body 2, the two support rods 2 42 are arranged horizontally and one end thereof is fixed to the support rod 1 41, the support rod 3 43 is rotatably installed between the two support rods 2 42, and torsion springs are installed at the ends of both, the two support rods 44 are fixed to the support rod 3 43, the cleaning rod body 46 is rotatably installed between the two support rods 44, and the lower end of the cleaning rod body 46 is pressed against the inner wall of the rectangular thin opening 14;

[0054] It should be noted that the punch body 2 is pressed downward, the support rod 44 can be tilted and can be reset under the action of the torsion spring later, and the remaining support rods 1 41, 2 42 and 3 43 all serve as supports to ensure that the cleaning rod 46 can move horizontally and back and forth;

[0055] The support rod 2 42 and the support rod 44 are arranged at an acute angle, and the support rod 44 is bent along the direction of the acute angle to achieve movement. The support rod 2 42 is arranged horizontally, and a servo motor 45 is provided at the end of the cleaning rod body 46, and the servo motor 45 is slidably clamped in the clamping groove 13. During the movement of the support rod 44, the servo motor 45 is also forced to move horizontally, so that the cleaning rod body 46 can keep rotating when it moves.

[0056] Figure 5 and Figure 6 As shown, the cleaning rod body 46 includes a rotating shaft 461 and an outer blade 462 on its outer wall. The outer blade 462 is fixed to the rotating shaft 461 and is used to clean the oxide scale. The end of the rotating shaft 461 is fixed to the output end of the servo motor 45.

[0057] The outer blade 462 is in an arc shape, and the end in the direction of rotation is provided with a blade point 463. The outer side surface of the outer blade 462 is a blade edge 464. The blade edge 464 is in a rough arc shape. The axis of the blade edge 464 coincides with the axis of the rotating shaft 461. When rotating, the blade point 463 and the blade edge 464 of the outer blade 462 are squeezed against the inner wall of the rectangular thin opening 14 at intervals. The rotation of the blade point 463 and the blade edge 464 realizes the peeling off of the oxide layer and the grinding of the upper end of the fastener, thereby cleaning the upper end surface of the fastener to the greatest extent.

[0058] The rotating shaft 461 and the outer blade 462 on the outer wall thereof are both made of steel to maintain rigidity, clean the upper end of the fastener, and avoid deformation.

[0059] The working principle of the present invention is as follows: by placing the fastener from the head opening 15 and installing the slide plate 1 31 in the side opening 11, at the same time, squeezing the outer end of the slide plate 2 32, compressing the return spring 324, and making the squeezing hole 321 cooperate with the head opening 15 and the rod opening 16 to be on the same axis. After the fastener is placed, the squeezing hole 321 is in a limited state with the head opening 15 and the rod opening 16, which is equivalent to the fastener being clamped by the lateral movement of the slide plate 2 32 to prevent the fastener from falling off or moving out. At the same time, the spring inside the longitudinal opening 312 at the lower end is squeezed by the rod of the fastener, and the upper end of the fastener is flush with the upper end of the limiting mold 1 to achieve the limiting effect. After the fastener is processed, the slide plate 2 32 is pushed so that the slide plate 2 32 does not apply pressure to the fastener, that is, the outer side of the fastener is not affected by external force, so that the fastener can be ejected upward under the action of the lower end spring, which is convenient for taking out the fastener. It should be noted that when the fastener is restricted in the limiting mold 1, the lower end of the head of the fastener is limited by the second slide plate 32, the outer side of the head is limited by the head opening 15, the rod is limited by the extrusion hole 321 and the rod opening 16, the lower end of the rod is supported by the cup slide plate 31, the fastener is at the upper end of the head, and the rest of the parts are limited, which can avoid deformation of the fastener and maintain the shape to the greatest extent;

[0060] In addition, the fasteners are heat treated before stamping, so oxide scale will fall downward. When it falls onto slide plate 1 31 and slide plate 2 32, slide plate 2 32 is pulled out, and the oxide scale is limited in the head opening 15, and then falls downward from the through opening 322 and falls onto slide plate 1 31. Then slide plate 1 31 is pulled outward, so that the oxide scale located inside the rod opening 16 moves to the receiving cavity 311 for collection to avoid affecting subsequent processing and to prevent marks from being produced on the surface of the subsequently squeezed limiting part. It should be noted that when slide plate 1 31 is pulled out, the spring in its longitudinal opening 312 is in an upwardly bouncing position, so it is necessary to squeeze the spring downward into the longitudinal opening 312 so that the longitudinal opening 312 is blocked by the limiting mold 1 to avoid affecting the movement of slide plate 1 31.

[0061] When the limit piece is installed on the limit mold 1, the punch body 2 moves downward under the action of hydraulic pressure, and when it impacts downward, a mark is squeezed out on the upper end surface of the limit piece head to achieve the processing of the limit piece. It should be noted that during the downward movement of the punch body 2, the rod assembly is bent, and the cleaning rod 46 at the lower end of the rod assembly moves horizontally along the limit mold 1, so that the upper end surface of the fastener limited in the limit mold 1 is cleaned, wherein the cleaning rod 46 is driven to rotate by the servo motor 45 when moving, so that the cleaning rod 46 rotates, and at the same time, during the up and down movement of the punch body 2, the cleaning rod 46 moves in two reciprocating directions;

[0062] The punch body 2 moves downward, the rotating shaft 461 in the cleaning rod body 46 rotates, and the outer blade 462 on the outside rotates counterclockwise, first making the blade point 463 contact the upper end of the fastener head, and then the blade edge 464 squeezes and squeezes, the blade point 463 can lift the residual oxide belt, and the blade edge 464 is polished to keep the upper end of the fastener head clean to the greatest extent;

[0063] In addition, the punch body 2 moves upward, the rotating shaft 461 in the cleaning rod body 46 rotates, and the outer blade 462 on its outer side still rotates counterclockwise, first contacting the upper end of the fastener head from top to bottom. Even if the fastener head produces local deformation, it can avoid affecting the movement of the cleaning rod body 46.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An efficient high-pressure forming punch for fasteners, comprising a limiting die (1) for limiting the position of the fasteners and a punch body (2) for punching the fasteners, characterized in that: The limiting mold (1) is provided with an inner support portion (3) for supporting, and the outer side of the punch body (2) is also provided with an outer support portion (4) for processing fasteners, and the inner support portion (3) comprises: Slide plate 1 (31), slidably disposed inside the limiting mold (1) and used to support the lower end of the fastener; The second slide plate (32) is also slidably disposed in the limiting mold (1) and is used to support the fastener laterally. The outer support portion (4) comprises: A rod assembly connected to the punch body (2) and deformed when the punch body (2) moves; A cleaning rod (46) is arranged at the end of the rod assembly and is used to process the stamping surface of the fastener; The lower end of the punch body (2) is in a polygonal shape, the fastener is limited in the limiting mold (1), and the punch body (2) and the fastener are located on the same axis; The upper end of the limiting mold (1) is also provided with a transversely arranged slot (13) and a rectangular thin opening (14) located on the upper end surface, and the fastener is located in the rectangular thin opening (14); The rod assembly comprises a support rod 1 (41), two support rods 2 (42), a support rod 3 (43) and two support rods 4 (44); the support rod 1 (41) is fixed to the outside of the punch body (2); the two support rods 2 (42) are arranged transversely and one end of each support rod is fixed to the support rod 1 (41); the support rod 3 (43) is rotatably mounted between the two support rods 2 (42), and torsion springs are installed at the ends of both support rods 2 (42); the two support rods 4 (44) are fixed to the support rod 3 (43); the cleaning rod body (46) is rotatably mounted between the two support rods 4 (44), and the lower end of the cleaning rod body (46) is pressed against the inner wall of the rectangular thin opening (14); The second support rod (42) and the fourth support rod (44) are arranged at an acute angle, the second support rod (42) is arranged horizontally, a servo motor (45) is provided at the end of the cleaning rod body (46), and the servo motor (45) is slidably mounted in the slot (13); The cleaning rod body (46) comprises a rotating shaft (461) and an outer blade (462) on an outer wall thereof, wherein the outer blade (462) and the rotating shaft (461) are fixedly arranged, and the outer blade (462) is used to clean the oxide scale, and the end of the rotating shaft (461) is fixed to the output end of the servo motor (45); The outer blade (462) is in an arc shape, and its end in the direction of rotation is provided with a blade point (463). The outer side surface of the outer blade (462) is a blade edge (464). The blade edge (464) is provided in a rough arc shape. The axis of the blade edge (464) coincides with the axis of the rotating shaft (461). When rotating, the blade point (463) and the blade edge (464) of the outer blade (462) are spaced apart and squeezed against the inner wall of the rectangular thin opening (14).

2. The high-efficiency fastener high-pressure forming punch according to claim 1, characterized in that: The outer ends of the limiting mold (1) are respectively provided with a side opening 1 (11) and a side opening 2 (12), and the slide plate 1 (31) and the slide plate 2 (32) slide in the side opening 1 (11) and the side opening 2 (12) respectively; The upper end of the limiting mold (1) is provided with a head opening (15) extending downwardly into the second side opening (12); the limiting mold (1) is provided with a stem opening (16) extending from the second side opening (12) into the first side opening (11); the head of the fastener is clamped into the head opening (15), the stem is clamped into the stem opening (16), the lower end of the fastener is supported on the first slide plate (31), and the upper end of the fastener is flush with the limiting mold (1); The diameter of the head opening (15) is greater than the diameter of the stem opening (16).

3. The high-efficiency fastener high-pressure forming punch according to claim 2, characterized in that: The second slide plate (32) is provided with an extrusion hole (321) from top to bottom, the extrusion hole (321) has the same diameter as the rod opening (16), and the head of the fastener is supported at the upper end of the extrusion hole (321); The slide plate 2 (32) is also provided with a through hole (322), and the through hole (322) is located in the opposite direction of the movement of the extrusion hole (321) and is used to remove the generated impurities; A box body (323) is also fixed on the outside of the limiting mold (1), a return spring (324) is fixed inside the box body (323), and the outer end of the return spring (324) is fixed to the second slide plate (32).

4. The high-efficiency fastener high-pressure forming punch according to claim 2, characterized in that: The upper end of the slide plate (31) is provided with a longitudinal opening (312) with a spring inside, the longitudinal opening (312) is supported on the lower end of the fastener, and the diameter of the longitudinal opening (312) is smaller than the fastener, and the spring inside is used to bounce the fastener upward; The upper end of the slide plate 1 (31) is also provided with a non-through receiving cavity (311), and when the slide plate 1 (31) moves, the impurities slide into the receiving cavity (311).

5. The high-efficiency fastener high-pressure forming punch according to claim 1, characterized in that: The rotating shaft (461) and the outer blade (462) on its outer wall are both made of steel.

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