Hardware trimming and cold heading die

Abstract

The trimming and cold heading die for the hardware comprises an upper die and a lower die, the upper die comprises an upper die body, an annular stripping block, a trimming punching needle, a base plate and a first reset spring, a first movable cavity is formed in the upper die body, and the first reset spring is connected between the top of the first movable cavity and the top of the base plate in an abutting mode. Push rods are fixedly connected to the four sides of the top of the annular stripping block and penetrate through the upper die body, the bottoms of the push rods are fixedly connected with the bottom of the base plate, and the trimming punching needle is fixedly connected to the bottom of the upper die body and can move in an inner ring of the annular stripping block. The lower die comprises a lower die body, a trimming die core, an ejector sleeve and a second reset spring, a trimming through groove matched with the ejector sleeve is formed in the trimming die core in a penetrating mode, a second movable cavity is formed in the lower die body, the ejector sleeve is movably arranged in the trimming through groove, and the second reset spring abuts against the portion between the ejector sleeve and the second movable cavity, so that the machining process can be simplified, and the production efficiency is improved; the production cost is reduced, the flatness of a machined surface is improved, and burrs are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading dies, in particular to a trimming cold heading die for hardware. Background Art

[0002] There is one model as attached Figure 4 The hardware 3 shown in the figure includes a head 30 and a rod 32. The head 30 and the top of the rod 32 are connected by a connecting portion 31. During the processing, the head 30 needs to be cold-forged to punch out the outer edge of the head 30 to form a desired shape. The finished product is shown in the attached Figure 5 The existing cold heading die cannot completely remove the material when processing the hardware 3, and can only perform multiple local cold headings around the head 30. This cold heading method causes large deformation of the product, uneven processing surface, many burrs, high processing cost, complicated processing process, and low production efficiency. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a trimming cold heading die for hardware parts, so as to improve processing quality and processing efficiency and reduce production costs.

[0004] To solve the above technical problems, a hardware trimming cold heading die provided by the utility model includes an upper die and a lower die. The upper die includes an upper die body, an annular stripping block, a trimming punch needle, a pad, and a first return spring. The upper die body is hollow and provided with a first movable cavity matching the pad. The pad is movably arranged in the first movable cavity. The first return spring abuts between the top of the first movable cavity and the top of the pad. Push rods are fixedly connected to the four sides of the top of the annular stripping block. The push rods are arranged on the upper die body and the bottom of the push rods is fixedly connected to the bottom of the pad. The needle is fixedly connected to the bottom of the upper mold body and can move in the inner circle of the annular stripping block; the lower mold includes a lower mold body, a trimming mold core, a push tube, and a second return spring. A groove matching the trimming mold core is arranged on the top of the lower mold body, and the trimming mold core is arranged in the groove. A trimming through groove matching the push tube is penetrated on the trimming mold core. A second active cavity is hollowly arranged in the lower mold body, and a through hole is penetrated between the trimming through groove and the second active cavity. The push tube is movably arranged in the trimming through groove and the through hole, and the second return spring abuts between the bottom end of the push tube and the bottom of the second active cavity.

[0005] Preferably, the lower mold further includes an ejector pin, which is disposed through the lower mold body and movably disposed in the push tube.

[0006] The beneficial effects of the utility model are as follows: the utility model provides a trimming cold heading die for hardware, wherein the connecting part and the rod part of the hardware are respectively placed in the trimming through groove and the push tube, and the head of the hardware is located on the top of the trimming die core. When the die is closed, the upper die body is driven to descend, and the head edge of the hardware is clamped between the bottom of the annular stripping block and the top of the trimming die core. The pad compresses the first return spring under the upward thrust of the push rod to play a buffering role to prevent the head edge of the hardware from being deformed by the annular stripping block. The trimming punch needle descends with the upper die body to punch out the head edge of the hardware, and the head of the hardware enters the trimming through groove for forming. During cold heading, the push tube supports and buffers the connecting part under the elastic force of the second return spring, and the edge material of the hardware head that is punched out is smoothly stripped from the remaining part of the head. The structure is simple, can simplify the processing process, improve production efficiency, reduce production costs, improve the flatness of the processed surface, and reduce the generation of burrs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The cross-sectional structure schematic diagram of the mold of the utility model is illustrated.

[0008] Figure 2 The cross-sectional structure schematic diagram of the mold of the utility model in the mold opening state is illustrated.

[0009] Figure 3 The cross-sectional structure schematic diagram of the mold of the utility model in the mold closing state is illustrated.

[0010] Figure 4 The cross-sectional structure diagram of the hardware of the utility model before processing is illustrated.

[0011] Figure 5 The cross-sectional structure schematic diagram of the hardware after processing of the utility model is illustrated.

[0012] Explanation of the accompanying drawings: upper mold 1, upper mold body 10, first active cavity 100, annular stripping block 11, push rod 110, trimming punch 12, pad 13, first return spring 14, lower mold 2, lower mold body 20, second active cavity 200, trimming mold core 21, trimming through groove 210, push tube 22, second return spring 23, through hole 24, ejector pin 25, hardware 3, head 30, connecting part 31, rod part 32. DETAILED DESCRIPTION

[0013] To make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments.

[0014] Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present disclosure.

[0015] refer to Figure 1-5 .

[0016] The utility model provides a trimming cold heading die for hardware, comprising an upper die 1 and a lower die 2, the upper die 1 comprising an upper die body 10, an annular stripping block 11, a trimming punch 12, a pad 13, and a first return spring 14, the upper die body 10 is hollowly provided with a first movable cavity 100 matching the pad 13, the pad 13 is movably arranged in the first movable cavity 100, the first return spring 14 abuts between the top of the first movable cavity 100 and the top of the pad 13, the top four sides of the annular stripping block 11 are fixedly connected with a push rod 110, the push rod 110 is arranged on the upper die body 10 through and the bottom of the push rod 110 is fixedly connected to the bottom of the pad 13, the trimming punch 12 is fixedly connected to the upper die body 1 0 bottom and can move in the inner circle of the annular stripping block 11; the lower mold 2 includes a lower mold body 20, a trimming mold core 21, a push tube 22, and a second return spring 23. A groove matching the trimming mold core 21 is arranged on the top of the lower mold body 20, and the trimming mold core 21 is arranged in the groove. A trimming through groove 210 matching the push tube 22 is penetrated on the trimming mold core 21. The lower mold body 20 is hollowly provided with a second active cavity 200, and a through hole 24 is penetrated between the trimming through groove 210 and the second active cavity 200. The push tube 22 is movably arranged in the trimming through groove 210 and the through hole 24, and the second return spring 23 abuts between the bottom end of the push tube 22 and the bottom of the second active cavity 200.

[0017] The specific use principle is that the outer edge of the trimming punch 12 and the inner edge of the annular stripping block 11 are set to match the molding shape of the head 30 of the hardware 3, and the connecting part 31 and the rod part 32 of the hardware 3 are respectively placed in the trimming groove 210 and the push tube 22. The head 30 of the hardware 3 is located on the top of the trimming mold core 21. When the mold is closed, the upper mold body 10 is driven to descend, and the edge of the head 30 of the hardware 3 is clamped between the bottom of the annular stripping block 11 and the top of the trimming mold core 21. The pad 13 compresses the first return spring 14 under the upward thrust of the push rod 110 to play a buffering role. , to prevent the edge of the head 30 of the hardware 3 from being deformed by the annular stripping block 11, the trimming punch 12 descends with the upper mold body 10 to punch out the edge of the head 30 of the hardware 3, and the head 30 of the hardware 3 enters the trimming groove 210 for forming. During cold forging, the push tube 22 supports and cushions the connecting part 31 under the elastic force of the second return spring 23, and the edge material of the head 30 of the hardware 3 that is punched out is smoothly stripped from the remaining part of the head 30. Its structure is simple, which can simplify the processing process, improve production efficiency, reduce production costs, improve the flatness of the processed surface, and reduce the generation of burrs.

[0018] Based on the above embodiment, the lower mold 2 further includes an ejector pin 25, which is disposed through the lower mold body 20 and is movably disposed in the push tube 22. After the head 30 of the hardware 3 is punched into the trimming groove 210, the ejector pin 25 is driven upward, and the ejector pin 25 ejects the rod 32 of the hardware 3 from the push tube 22 to remove the product from the lower mold 2.

[0019] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A trimming cold heading die for hardware, comprising an upper die and a lower die, characterized in that: The upper mold comprises an upper mold body, an annular stripping block, a trimming punch, a pad, and a first return spring. The upper mold body is hollow and provided with a first movable cavity matching the pad. The pad is movably arranged in the first movable cavity. The first return spring abuts between the top of the first movable cavity and the top of the pad. Push rods are fixedly connected to the four sides of the top of the annular stripping block. The push rod is arranged on the upper mold body and its bottom is fixedly connected to the bottom of the pad. The trimming punch is fixedly connected to the bottom of the upper mold body and can be moved on the annular stripping block. The lower mold comprises a lower mold body, a trimming mold core, a push tube and a second return spring. A groove matching the trimming mold core is arranged on the top of the lower mold body. The trimming mold core is arranged in the groove. A trimming through groove matching the push tube is penetrated on the trimming mold core. A second movable cavity is hollowly arranged in the lower mold body. A through hole is penetrated between the trimming through groove and the second movable cavity. The push tube is movably arranged in the trimming through groove and the through hole. The second return spring abuts between the bottom end of the push tube and the bottom of the second movable cavity.

2. A trimming cold heading die for hardware according to claim 1, characterized in that: The lower mold further comprises an ejector pin, which is arranged on the lower mold body and is movably arranged in the push tube.

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