Press-fit cold heading die for hardware

Abstract

The press-fit cold heading die comprises a bottom die, a sliding rail sleeve, a first reset spring, an ejector sleeve and a supporting rod, the bottom die comprises a base part, a column part and a limiting column, a through hole matched with the ejector sleeve is formed in the center of the limiting column in a penetrating mode, the ejector sleeve is inserted into the through hole, a bottom die groove is formed in the top end of the through hole, and the supporting rod is arranged in the bottom die groove. The supporting rod is inserted into the push pipe, the top end of the supporting rod exceeds the top of the bottom model groove, more than two press-fit modules are arranged on the inner side of the sliding rail sleeve, each press-fit module comprises a sliding part and a forming part connected to the top of the sliding part, a first conical surface is arranged on the top of an inner ring of the sliding rail sleeve, and a second conical surface matched with the first conical surface is arranged on the outer side face of the sliding part. The second conical surface is slidably connected to the first conical surface, the inner side of the sliding part is provided with an arc-shaped limiting groove matched with the limiting column, and the inner side of the forming part is provided with an arc-shaped forming part, so that the machining process can be simplified, the machining efficiency is improved, the material loss is reduced, and the machining quality is improved.

Description

Technical Field

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

[0002] There is one model as attached Figure 5 The hardware 90 shown in the figure needs to be compressed in height and an annular groove 901 and an annular protrusion 902 are formed on the outer edge. Figure 6 At present, the processing process needs to be processed by turning for secondary processing, which is cumbersome, wastes labor, increases material loss, and has unstable processing dimensions, high processing costs and low production efficiency. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a pressing cold heading die for hardware parts, simplify the processing process, and improve the processing accuracy and processing efficiency.

[0004] To solve the above technical problems, a hardware pressing cold heading die is provided according to the utility model, which includes a bottom die, a slide rail sleeve, a first return spring, a push tube, and a support rod. The bottom die includes a base, a column portion arranged at the top of the base, and a limit column arranged at the top of the column portion. The slide rail sleeve is sleeved on the column portion and can move on the column portion. The first return spring is sleeved on the column portion and abuts between the base and the slide rail sleeve. A through hole matching the push tube is provided at the center of the limit column. The push tube is inserted in the through hole. A bottom model groove is arranged at the top end, the support rod is inserted in the push tube and its top end exceeds the top of the bottom model groove, two pressing modules are symmetrically arranged on the inner side of the slide rail sleeve, the pressing module includes a sliding part and a forming part connected to the top of the sliding part, a first conical surface is arranged at the top of the inner ring of the slide rail sleeve, a second conical surface matching the first conical surface is arranged on the outer side surface of the sliding part, the second conical surface is slidably connected to the first conical surface, an arc-shaped limiting groove matching the limiting column is arranged on the inner side of the sliding part, and an arc-shaped forming part is arranged on the inner side of the forming part.

[0005] Preferably, the top of the slide rail sleeve is fixedly connected to a limiting cover plate, the limiting column is sleeved with a second return spring abutting between the top of the column body and the bottom of the sliding part, and the top of the sliding part abuts against the bottom of the limiting cover plate under the elastic force of the second return spring.

[0006] Preferably, it also includes a mold shell, the bottom mold is arranged in the mold shell, the mold shell sleeve is arranged on the base, the outer wall of the slide rail sleeve is provided with a longitudinal guide groove, and the inner wall of the mold shell is provided with a limit pin located in the longitudinal guide groove.

[0007] The utility model has the following beneficial effects: the utility model provides a pressing cold heading die for hardware, the inner hole of the hardware is sleeved on the support rod and pushed in, so that the bottom end of the hardware contacts the top end of the push tube, when closing the mold, the slide rail sleeve is first pushed down, the slide rail sleeve will compress the first return spring, by pressing down the two pressing modules at the same time, because the second conical surface is slidably connected to the first conical surface, the pressing modules on both sides will descend and approach, the arc-shaped limit groove will be sleeved on the limit column, the two arc-shaped forming parts will be combined to form a circular ring and hold the outer side of the hardware to pull it down, the height of the hardware is compressed and its side wall is formed into annular protrusions and annular grooves at the bottom model groove and the arc-shaped forming part. When opening the mold, the slide rail sleeve will be reset under the elastic force of the first return spring, and the processed hardware can be taken out of the mold after the two pressing modules are opened. It has a simple structure, can simplify the processing process, improve processing efficiency, reduce material loss, and improve processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The cross-sectional structure schematic diagram of the mold of the utility model is illustrated.

[0009] Figure 2 The cross-sectional structure schematic diagram of the mold of the utility model in the mold opening state is illustrated.

[0010] Figure 3 The cross-sectional structure schematic diagram of the mold of the utility model in the mold closing state is illustrated.

[0011] Figure 4 The utility model is illustrated Figure 3 Schematic diagram of the partially enlarged structure of part A in the middle.

[0012] Figure 5 The cross-sectional structure diagram of the hardware of the utility model before processing is illustrated.

[0013] Figure 6 The cross-sectional structure schematic diagram of the hardware after processing of the utility model is illustrated.

[0014] Explanation of the accompanying figures: bottom mold 10, base part 11, column part 12, limiting column 13, bottom model groove 14, slide rail sleeve 20, first conical surface 21, longitudinal guide groove 210, limiting pin 211, first return spring 30, push tube 40, support rod 50, pressing module 60, sliding part 61, second conical surface 610, arc-shaped limiting groove 611, forming part 62, arc-shaped forming part 620, limiting cover plate 70, mold shell 80, hardware 90, inner hole 900, annular groove 901, annular protrusion 902. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] refer to Figure 1-6 .

[0018] The utility model provides a pressing cold heading die for hardware, comprising a bottom die 10, a slide rail sleeve 20, a first return spring 30, a push tube 40, and a support rod 50. The bottom die 10 comprises a base portion 11, a column portion 12 arranged at the top of the base portion 11, and a limiting column 13 arranged at the top of the column portion 12. The slide rail sleeve 20 is sleeved on the column portion 12 and can move on the column portion 12. The first return spring 30 is sleeved on the column portion 12 and abuts between the base portion 11 and the slide rail sleeve 20. A through hole matching the push tube 40 is provided at the center of the limiting column 13. The push tube 40 is inserted in the through hole. A bottom mold groove is provided at the top of the through hole. 14, the support rod 50 is inserted into the push tube 40 and its top end exceeds the top of the bottom model groove 14, and two pressing modules 60 are symmetrically arranged on the inner side of the slide rail sleeve 20. The pressing module 60 includes a sliding part 61 and a molding part 62 connected to the top of the sliding part 61. The top of the inner ring of the slide rail sleeve 20 is provided with a first conical surface 21, and the outer side surface of the sliding part 61 is provided with a second conical surface 610 matching the first conical surface 21. The second conical surface 610 is slidably connected to the first conical surface 21, and the inner side of the sliding part 61 is provided with an arc-shaped limiting groove 611 matching the limiting column 13, and the inner side of the molding part 62 is provided with an arc-shaped molding part 620.

[0019] The specific principle of use is that three pressing modules 60 can be evenly distributed on the inner side of the slide rail sleeve 20, and the inner hole 900 of the hardware 90 can be sleeved on the support rod 50 and pushed in so that the bottom end of the hardware 90 contacts the top end of the push tube 40. When closing the mold, first push the slide rail sleeve 20 down, and the slide rail sleeve 20 will compress the first return spring 30. By pressing down each pressing module 60 at the same time, since the second conical surface 610 is slidably connected to the first conical surface 21, the pressing modules 60 on both sides will descend and approach, and the arc-shaped limit groove 611 will be sleeved on the limit column 13. The two arc-shaped forming parts 620 will be combined to form a circular ring shape and hold the outer side of the hardware 90 to pull it down. The height of the hardware 90 is compressed and its side walls are formed with an annular protrusion 902 and an annular groove 901 at the bottom model groove 14 and the arc-shaped forming part 620. When the mold is opened, the slide rail sleeve 20 will be reset under the elastic force of the first reset spring 30, and the two pressing modules 60 can be opened to remove the processed hardware 90 from the mold. The structure is simple, which can simplify the processing process, improve processing efficiency, reduce material loss, and improve processing quality.

[0020] Based on the above embodiment, the top of the slide rail sleeve 20 is fixedly connected to the limit cover plate 70, and the limit column 13 is sleeved with a second return spring that abuts between the top of the column body 12 and the bottom of the sliding part 61. The top of the sliding part 61 abuts against the bottom of the limit cover plate 70 under the elastic force of the second return spring. The limit cover plate 70 can limit the two pressing modules 60. After the mold is opened, the pressing modules 60 are reset under the elastic force of the second return spring, and the two pressing modules 60 will be opened.

[0021] Based on the above embodiment, a mold shell 80 is further included, the bottom mold 10 is arranged in the mold shell 80, the mold shell 80 is sleeved on the base 11, the outer wall of the slide rail sleeve 20 is provided with a longitudinal guide groove 210, and the inner wall of the mold shell 80 is provided with a limit pin 211 located in the longitudinal guide groove 210. When the slide rail sleeve 20 moves up and down, the limit pin 211 will move in the longitudinal guide groove 210, which can limit the movable stroke of the slide rail sleeve 20.

[0022] 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 cold heading die for pressing of hardware, characterized in that: The invention comprises a bottom mold, a slide rail sleeve, a first return spring, a push tube, and a support rod. The bottom mold comprises a base, a column portion arranged at the top of the base, and a limit column arranged at the top of the column portion. The slide rail sleeve is sleeved on the column portion and can move on the column portion. The first return spring is sleeved on the column portion and abuts between the base and the slide rail sleeve. A through hole matching the push tube is provided at the center of the limit column. The push tube is inserted in the through hole. A bottom mold groove is provided at the top of the through hole. The support rod Inserted in the push tube and its top end exceeds the top of the bottom model groove, the inner side of the slide rail sleeve is provided with more than two pressing modules, the pressing module includes a sliding part and a forming part connected to the top of the sliding part, the top of the inner ring of the slide rail sleeve is provided with a first conical surface, the outer side surface of the sliding part is provided with a second conical surface matching the first conical surface, the second conical surface is slidably connected to the first conical surface, the inner side of the sliding part is provided with an arc-shaped limit groove matching the limit column, and the inner side of the forming part is provided with an arc-shaped forming part.

2. A pressing cold heading die for hardware according to claim 1, characterized in that: The top of the slide rail sleeve is fixedly connected to a limit cover plate, the limit column is sleeved with a second return spring abutting between the top of the column body and the bottom of the sliding part, and the top of the sliding part abuts against the bottom of the limit cover plate under the elastic force of the second return spring.

3. A pressing cold heading die for hardware according to claim 2, characterized in that: It also includes a mold shell, the bottom mold is arranged in the mold shell, the mold shell is sleeved on the base, the outer wall of the slide rail sleeve is provided with a longitudinal guide groove, and the inner wall of the mold shell is provided with a limit pin located in the longitudinal guide groove.

Images