Fastener cold heading forming machining tool

Abstract

The utility model provides a fastener cold heading forming machining tool which comprises a mounting table, a cold air supply assembly is fixedly connected to the bottom of the mounting table, a forming sleeve is fixedly connected to one end of the cold air supply assembly, one side of the forming sleeve is fixedly connected to the upper portion of the mounting table, and a plurality of extrusion sliding tables are slidably connected to the upper portion of the forming sleeve. A four-way air groove is formed in the bottom supporting rod, a plurality of sleeve cooling pipes are arranged on the inner side of the forming sleeve, a sliding table cooling groove is formed in the extrusion sliding table, and the cold air supply assembly comprises an air pump, a vortex pipe and a cold air supply pipe. Compressed air is driven by the air pump to enter the vortex tube to separate cold and hot air flows, cold air passes through the four-way air groove, the sleeve cooling tube and the sliding table cooling groove to form closed-loop circulation, a formed sleeve, an extrusion sliding table and a cold heading head are directly cooled in real time, volatilization and carbonization of lubricating oil can be effectively restrained, and smoke and residues are reduced. Meanwhile, material hardening or deformation caused by too fast temperature rise of the mold is avoided, machining stability is improved, and the service life of the mold is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of cold heading technology, and in particular to a tooling for cold heading of fasteners. Background Technology

[0002] Cold heading is a metal pressure processing technique that applies external force to metal bars using a die at room temperature, causing plastic deformation and volume redistribution to form specific parts or blanks. Its core advantage lies in "minimal cutting" or "no cutting," making it particularly suitable for producing the heads of standard fasteners such as screws, bolts, and rivets. It significantly improves material utilization and enhances the mechanical properties of the parts. It is commonly used for machining fasteners such as bolts. However, during cold heading, due to high-speed, repeated extrusion, the lubricating oil inside the cold heading fixture may evaporate or carbonize at high temperatures, resulting in residue and fumes within the fixture, affecting the cold heading effect and polluting the processing environment.

[0003] A search revealed a Chinese patent publication number CN217798717U, which discloses a bolt cold heading processing device with a high temperature alarm function. The device includes a base, a cold heading machine body, and a storage box. The cold heading machine body is mounted on the top of the base via a mounting bracket. A high temperature alarm is mounted on one side of the cold heading machine body via bolts. An exhaust port is embedded in the top of the cold heading machine body. The exhaust port is connected to a gas collection hood via a connecting pipe, and a processing cylinder is welded to the top of the gas collection hood.

[0004] To address the lack of cooling function for the forming fixture in the aforementioned technologies, which, although capable of extracting smoke, cannot reduce the generation of smoke and residue, a fastener cold heading forming fixture is proposed. Utility Model Content

[0005] In view of this, the present invention aims to provide a fastener cold heading forming tooling to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial option.

[0006] The technical solution of this utility model embodiment is implemented as follows: it includes an installation platform, a cold air supply component is fixedly connected to the bottom of the installation platform, a forming sleeve is fixedly connected to one end of the cold air supply component, one side of the forming sleeve is fixedly connected to the top of the installation platform, a plurality of extrusion slides are slidably connected to the top of the forming sleeve, a four-way air groove is opened inside the bottom support rod, a plurality of sleeve cooling pipes are opened inside the forming sleeve, and a slide cooling groove is opened inside the extrusion slide.

[0007] In some embodiments, the air supply assembly includes an air pump, a vortex tube, and an air supply pipe. The air pump is fixedly connected to the bottom of the mounting platform, the air inlet end of the vortex tube is fixedly connected to the air outlet end of the air pump, the air outlet end of the vortex tube is fixedly connected to the air supply pipe, and the other end of the air supply pipe is fixedly connected to the bottom support rod.

[0008] In some embodiments, a pressing push rod is fixedly connected to the top of the mounting platform, and a cold heading head is fixedly connected to the movable end of the pressing push rod. A top venting groove is opened inside the cold heading head.

[0009] In some embodiments, the slide cooling tank is fixedly connected to multiple support plates, the sleeve cooling pipe is fixedly connected to multiple support rings, and the molded sleeve has multiple cooling rings inside, which are connected to the sleeve cooling pipe.

[0010] In some embodiments, the upper part of the forming sleeve has multiple limiting grooves, and a limiting slider is slidably connected in the limiting groove. The limiting slider is fixedly connected to the bottom of the extrusion slide, and a connecting rod is rotatably connected to one side of the limiting slider and the bottom support rod.

[0011] In some embodiments, a limit rod and a spring are fixedly connected above the mounting platform, and the other end of the spring is fixedly connected to the bottom of the bottom support rod.

[0012] In some embodiments, a micro switch is fixedly connected above the mounting platform, and a trigger rod is fixedly connected to one side of the bottom support rod.

[0013] In some embodiments, a dust collection hood is fixedly connected to the movable end of the extrusion push rod, a dust collection pipe is fixedly connected to one end of the dust collection hood, and one side of the dust collection pipe is fixedly connected to an external ventilation device.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] This application uses an air pump to drive compressed air into a vortex tube to separate hot and cold airflows. The cold air forms a closed loop through the four-way air groove, the sleeve cooling pipe, and the slide cooling groove, directly cooling the forming sleeve, extrusion slide, and cold heading head in real time. This can effectively inhibit the volatilization and carbonization of lubricating oil, reduce the generation of smoke and residue, and at the same time avoid material hardening or deformation caused by excessive temperature rise in the mold, thereby improving processing stability and mold life.

[0016] This application uses a microswitch to trigger the start and stop of the air pump, and combines the dust collection hood with the external ventilation equipment to achieve the directional emission of cooling gas and processing fumes, thereby reducing oil mist pollution in the working environment.

[0017] This application achieves automatic centering and clamping of fasteners within the forming sleeve by driving multiple sets of extrusion slides to move synchronously inward via a connecting rod when the bottom support rod is pressed down.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is the main view of the structure of this utility model.

[0021] Figure 2 This is a partial structural diagram of the lower side of this utility model.

[0022] Figure 3 This is a structural diagram of the extrusion slide of this utility model.

[0023] Figure 4 This is a cross-sectional view of the molded sleeve of this utility model.

[0024] Figure 5 This is a partial cross-sectional view of the present invention.

[0025] Figure label:

[0026] 1. Mounting platform; 2. Forming sleeve; 3. Extrusion push rod; 4. Dust hood; 5. Dust suction pipe; 6. Air pump; 7. Vortex tube; 8. Cold air supply pipe; 9. Limiting rod; 10. Bottom support rod; 11. Cold heading head; 12. Top exhaust groove; 13. Limiting slide groove; 14. Extrusion slide; 15. Limiting slider; 16. Connecting rod; 17. Spring; 18. Micro switch; 19. Trigger rod; 20. Four-way vent; 21. Sleeve cooling pipe; 22. Support ring; 23. Slide cooling groove; 24. Support plate; 25. Cooling ring. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] Example 1:

[0030] like Figure 1-5As shown, the fastener cold heading forming tooling includes a mounting platform 1. A cold air supply component is fixedly connected to the bottom of the mounting platform 1. A forming sleeve 2 is fixedly connected to one end of the cold air supply component. One side of the forming sleeve 2 is fixedly connected to the top of the mounting platform 1. Multiple extrusion slides 14 are slidably connected to the top of the forming sleeve 2. A four-way air groove 20 is opened inside the bottom support rod 10. Multiple sleeve cooling pipes 21 are opened inside the forming sleeve 2. A slide cooling groove 23 is opened inside the extrusion slide 14.

[0031] The air supply assembly includes an air pump 6, a vortex tube 7, and an air supply pipe 8. The vortex tube 7 can generate a high-speed vortex by compressed air, and use centrifugal force to separate the hot and cold air streams and spray them out from both ends. The air pump 6 is fixedly connected to the bottom of the mounting platform 1. The air inlet end of the vortex tube 7 is fixedly connected to the air outlet end of the air pump 6. The cold air outlet end of the vortex tube 7 is fixedly connected to the air supply pipe 8. The other end of the air supply pipe 8 is fixedly connected to the bottom support rod 10.

[0032] The cold air supply assembly can use the vortex tube 7 to divide the gas pumped by the air pump 6 into two streams, one hot and one cold, which are separated from both ends. The low-temperature gas enters the cold air supply pipe 8 and then enters the four-way air groove 20 in the bottom support rod 10 above. During cold forging, the fastener is inserted into the forming sleeve 2, which squeezes the bottom support rod 10 to move downward and drives multiple extrusion slides 14 to move inward.

[0033] This allows the interfaces of the four-way vent 20, the sleeve cooling pipe 21, and the slide cooling tank 23 to be aligned. Then, the air pump 6 is started, and low-temperature gas is introduced into the four-way vent 20, the sleeve cooling pipe 21, and the slide cooling tank 23 to cool and lower the temperature of the forming sleeve 2 and the extrusion slide 14, preventing the lubricating oil from evaporating and carbonizing, and reducing the formation of smoke and residue.

[0034] In this embodiment, a pressing push rod 3 is fixedly connected to the top of the mounting platform 1, and a cold heading head 11 is fixedly connected to the movable end of the pressing push rod 3. The cold heading head 11 has a top venting groove 12 inside. The pressing push rod 3 can use the cold heading head 11 to press down and process fasteners. The lower end of the top venting groove 12 can be connected to the slide cooling groove 23 to cool the cold heading head 11 while preventing complete gas blockage.

[0035] In this embodiment, a plurality of limiting grooves 13 are opened above the forming sleeve 2, and limiting sliders 15 are slidably connected in the limiting grooves 13. The limiting sliders 15 are fixedly connected to the bottom of the extrusion slide table 14 above, and a connecting rod 16 is rotatably connected to one side of the limiting sliders 15 and the bottom support rod 10.

[0036] When the bottom support rod 10 is pressed downward, it will press the compression slide 14 inward through the connecting rod 16, and the fastener will be self-centered and clamped through the three compression slides 14.

[0037] In this embodiment: the cold air supply component can use the vortex tube 7 to divide the gas pumped by the air pump 6 into two streams, one cold and one hot, which are separated from both ends. The low-temperature gas enters the cold air supply pipe 8 and then enters the four-way air groove 20 in the bottom support rod 10 above. During cold forging, the fastener is inserted into the forming sleeve 2, which squeezes the bottom support rod 10 to move downward and drives multiple extrusion slides 14 to move inward.

[0038] This allows the interfaces of the four-way vent 20, the sleeve cooling pipe 21, and the slide cooling tank 23 to be aligned. Then, the air pump 6 is started, and low-temperature gas is introduced into the four-way vent 20, the sleeve cooling pipe 21, and the slide cooling tank 23 to cool and lower the temperature of the forming sleeve 2 and the extrusion slide 14, preventing the lubricating oil from evaporating and carbonizing, and reducing the formation of smoke and residue.

[0039] The extrusion push rod 3 can use the cold heading head 11 to extrude and process fasteners downwards. The lower end of the top exhaust groove 12 can be connected to the slide cooling groove 23 to cool the cold heading head 11 while preventing complete gas blockage. When the bottom support rod 10 is extruded and moves downwards, it will extrude the extrusion slide 14 inwards through the connecting rod 16, and the fasteners will be self-centered and clamped by the three extrusion slides 14.

[0040] Example 2:

[0041] The fastener cold heading forming tooling in this embodiment is improved based on embodiment 1 as follows: Figure 1-5 As shown,

[0042] In this embodiment, multiple support plates 24 are fixedly connected inside the slide cooling tank 23, multiple support rings 22 are fixedly connected inside the sleeve cooling pipe 21, and multiple cooling rings 25 are opened inside the forming sleeve 2. The cooling rings 25 are connected to the sleeve cooling pipe 21. The support plates 24 and the support rings 22 have openings on their inner sides, which can improve the strength of the forming sleeve 2 and the extrusion slide 14 while allowing gas to pass through. The cooling rings 25 can increase the cooling range.

[0043] In this embodiment, a limiting rod 9 and a spring 17 are fixedly connected above the mounting platform 1. The other end of the spring 17 is fixedly connected to the bottom of the bottom support rod 10. The limiting rod 9 can limit the maximum descent position of the bottom support rod 10 and support the workpiece. The spring 17 can use its elasticity to reset the bottom support rod 10.

[0044] In this embodiment, a micro switch 18 is fixedly connected above the mounting platform 1, and a trigger rod 19 is fixedly connected to one side of the bottom support rod 10. When the bottom support rod 10 moves to the bottom, the trigger rod 19 on the side can be used to squeeze the micro switch 18. The micro switch 18 is electrically connected to the air pump 6, and the air pump 6 can be started at this time to cool down.

[0045] In this embodiment, a dust suction hood 4 is fixedly connected to the movable end of the extrusion push rod 3, and a dust suction pipe 5 is fixedly connected to one end of the dust suction hood 4. The dust suction pipe 5 is fixedly connected to an external ventilation device on one side. The gas sprayed upward through the slide cooling tank 23 or the top exhaust tank 12 will carry a small amount of volatile dust. At this time, the gas can be drawn away by the air sink pipe 5 connected to the external ventilation device and the dust suction hood 4.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A cold heading forming processing tool for fasteners, comprising a mounting table (1), characterized in that: The bottom of the mounting table (1) is fixedly connected with a cold air supply assembly, one end of the cold air supply assembly is fixedly connected with a shaped sleeve (2), one side of the shaped sleeve (2) is fixedly connected above the mounting table (1), a plurality of extrusion sliding tables (14) are slidably connected above the shaped sleeve (2), a four-way air groove (20) is formed in the bottom support rod (10), a plurality of sleeve cooling pipes (21) are formed in the inner side of the shaped sleeve (2), and a sliding table cooling groove (23) is formed in the extrusion sliding table (14).

2. The fastener cold upset forming tooling process of claim 1, wherein: The cold air supply assembly comprises a gas pump (6), a vortex pipe (7) and a cold air supply pipe (8), the gas pump (6) is fixedly connected below the mounting table (1), the gas inlet end of the vortex pipe (7) is fixedly connected to the gas outlet end of the gas pump (6), the cold air outlet end of the vortex pipe (7) is fixedly connected to the cold air supply pipe (8), and the other end of the cold air supply pipe (8) is fixedly connected below the bottom support rod (10).

3. The fastener cold upset forming tooling process of claim 2, wherein: The top of the mounting table (1) is fixedly connected with an extrusion push rod (3), the movable end of the extrusion push rod (3) is fixedly connected with a cold heading head (11), and a top air exhaust groove (12) is formed in the cold heading head (11).

4. The fastener cold upset forming tooling process of claim 1 wherein: A plurality of support plates (24) are fixedly connected in the sliding table cooling groove (23), a plurality of support rings (22) are fixedly connected in the sleeve cooling pipe (21), a plurality of cooling rings (25) are formed in the shaped sleeve (2), and the cooling rings (25) are connected with the sleeve cooling pipe (21).

5. The fastener cold upset forming tooling process of claim 1 wherein: A plurality of limiting sliding grooves (13) are formed above the shaped sleeve (2), limiting sliding blocks (15) are slidably connected in the limiting sliding grooves (13), the limiting sliding blocks (15) are fixedly connected to the bottom of the extrusion sliding table (14) above, and the limiting sliding blocks (15) are rotatably connected with connecting rods (16) on one side of the bottom support rod (10).

6. The fastener cold upset forming tooling process of claim 5, wherein: The top of the mounting table (1) is fixedly connected with a limiting rod (9) and a spring (17), and the other end of the spring (17) is fixedly connected to the bottom of the bottom support rod (10).

7. The fastener cold upset forming tooling process of claim 6 wherein: The top of the mounting table (1) is fixedly connected with a micro switch (18), and one side of the bottom support rod (10) is fixedly connected with a trigger rod (19).

8. The fastener cold upset forming tooling process of claim 3, wherein: The movable end of the extrusion push rod (3) is fixedly connected with a dust collection cover (4), one end of the dust collection cover (4) is fixedly connected with a dust collection pipe (5), and one side of the dust collection pipe (5) is fixedly connected to an external air extraction device.

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