A bolt cold heading forming device

Abstract

The application discloses a bolt cold upsetting forming device, which comprises a cutting station, a first punching station, a second punching station and a third punching station, and an equipment box is arranged between the cutting station and the first punching station. The bolt wire material after cutting can be polished and deburred at both ends by the polishing cylinder, the both ends of the rod material are polished, the cutting burrs are avoided from being brought into the mold, the problems of being stuck and punched are avoided, the forming efficiency of the bolt cold upsetting is improved, the mold is protected, the service life of the mold is prolonged, the stability and efficiency of production are improved, meanwhile, the compressed cold gas in the compressed cold gas storage tank is sprayed out, passes through the gas conveying pipe, the pressure rubber pipe, the connecting pipe and the main pipe and is sprayed out from the airflow channel, the burr and the debris generated after polishing are blown out by the high-speed airflow, automatic cleaning is completed, meanwhile, the cold gas also plays a role in cooling the abrasive, the problem of continuous polishing overheating damage of the abrasive is avoided, automatic cooling is completed, and the convenience of use is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolt production, in particular to a bolt cold heading forming device. BACKGROUND

[0002] Bolts are a common type of part in daily life. In the production process, some bolts can be formed by cold heading, and then wiredrawing. The traditional screw cold heading forming adopts a cold heading machine. The cold heading machine is installed with multiple sets of dies. The bolts are gradually formed by pressure cold heading.

[0003] However, many problems occur in the cold heading process, affecting the forming quality of the bolts. After searching, it is found that the website information is https: / / wenku.baidu.com / view / 6be031e90f22590102020740be1e650e53eacf5a.html?_wkts_=1669526422255&bdQuery=%E5%86%B7%E9%95%A6%E8%9E%BA%E6%A0%93%E7%94%9F%E4%BA%A7%E8%B4%A8%E9%87%8F%E9%80%9A%E7%97%85, and the name is Common Defects in Cold Heading Forming. It is clear that problems such as damage, rolling and under-impact often occur in the cold heading process. Damage and rolling are mostly caused by burrs on the bar. The reasons for under-impact are various, including that the lubricating oil or dirt is blocked in the die, so that the metal cannot be filled. At the same time, during the cold heading process, the occurrence of pitting also occurs. After searching, the website information is https: / / www.doc88.com / p-6741229094871.html?r=1, and the name is Analysis of Surface Pitting Causes in Cold Heading Bolt Production. This article proposes that a large amount of gas in the air causes poor air entraining agent effect, resulting in large bubbles forming pitting problems, which affects the forming efficiency and quality of the bolts, and also affects the service life of the die. Further improvement can be made. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the deficiencies in the prior art, the present application provides a bolt cold heading forming device, which has the advantages of avoiding damage and rolling, reducing under-impact, reducing pitting, being easy to use, being convenient for cleaning production, and solving the problems in the background art.

[0006] (II) Technical solutions

[0007] To achieve the above-mentioned advantages of avoiding injury and rolling, reducing under-impact, reducing pitting, easy to use, convenient cleaning production, the specific technical solutions adopted by the present application are as follows:

[0008] A bolt cold heading forming device, comprising a cutting station, a first punching station, a second punching station and a third punching station, a device box is arranged between the cutting station and the first punching station, and a main pipe is rotatably connected at both ends of the device box, a driven gear is fixedly sleeved on the surface of the main pipe, a polishing cylinder is fixedly connected at one end of the main pipe, an abrasive is fixedly connected to the inner wall of the polishing cylinder, and an airflow channel is formed on the surface of the polishing cylinder and the abrasive, the airflow channel is in through connection with the main pipe, a brake motor is fixedly installed inside the device box, a driving gear is installed on the output end of the brake motor, and the driving gear is in meshing connection with the driving gear, a first air cylinder is installed at one end of the device box, a support is fixedly installed at one end of the device box, a connecting pipe is fixedly connected through the surface of the support, the connecting pipe is in through rotatable connection with the main pipe through a gas rotary connector, a sealing cover is fixedly arranged outside the cutting station, the first punching station, the second punching station and the third punching station, compressed cold gas storage tanks are installed outside the sealing cover, and a plurality of compressed cold gas storage tanks are arranged, a gas outlet end of the compressed cold gas storage tank is in through connection with a gas conveying pipe, an electromagnetic valve is installed on the surface of the gas conveying pipe, the other end of the connecting pipe is in through connection with the gas conveying pipe of one of the compressed cold gas storage tanks through a pressure rubber pipe, a blowing pipe is arranged on one side of the first punching station, the second punching station and the third punching station corresponding to one side of a mold cavity, a movable plate is fixedly sleeved on the surface of the blowing pipe, a fixing frame is slidably sleeved on the outer wall of the blowing pipe, a second air cylinder is connected between the fixing frame and the movable plate, the other end of the blowing pipe is also in through connection with the gas conveying pipe of the remaining compressed cold gas storage tanks through a pressure rubber pipe, an air exhaust pipe is in through connection with the surface of the sealing cover, the other end of the air exhaust pipe is in through connection with a filter box, and the other end of the filter box is in through connection with a vacuum pump.

[0009] Further, the piston rod of the first air cylinder is fixedly connected with the device box, and the rear end cover of the first air cylinder is fixedly connected with the inner wall of the sealing cover.

[0010] Further, a bearing seat is fixedly installed inside the device box, the main pipe penetrates through the bearing seat and is in rotatable connection with the bearing seat.

[0011] Further, the fixing frame is fixedly connected with the sealing cover.

[0012] Further, the piston rod of the second air cylinder is fixedly connected with the movable plate, and the rear end cover of the second air cylinder is fixedly connected with the fixing frame.

[0013] Further, a perforated plate is fixedly installed inside the filter box, and a filter element is fixedly installed on one side surface of the perforated plate close to the air exhaust pipe.

[0014] Further, the top cover is fixedly installed on the top surface of the filter box by screws and is sealingly connected with the filter box.

[0015] Further, the butt plate is welded on one end of the main pipe, and bolt holes are formed in one end of the polishing cylinder outside the airflow channel.

[0016] Further, the inner wall of the abrasive is a circular truncated cone structure, and the vertical minimum cross-sectional diameter of the abrasive is equal to the designed diameter of the bar.

[0017] Further, the guide plate is fixedly installed on one side surface of the equipment box, and the guide rod is fixedly installed on the inner wall of the sealing cover and penetrates through the guide plate and is slidingly connected with the guide plate.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the bolt cold heading forming device has the following beneficial effects:

[0020] (1) The polishing cylinder is used to polish and deburr the two ends of the cut bolt wire rod, in the process of bolt cold end, the wire rod is cut into a bar of a certain length after the cutting of the cutting station, and the bar moves through the polishing cylinder, the first cylinder is elongated, at the same time, the brake motor in the equipment box is started to drive the driving gear to rotate, and then drive the driven gear to rotate, drive the main pipe to rotate and drive the polishing cylinder to rotate, the elongation of the first cylinder pushes the polishing cylinder in rotation to be sleeved on the two ends of the bar, and the two ends of the bar are polished, so that the cutting burr is avoided from being brought into the mold, thereby avoiding the problems of injury and coiling, improving the forming efficiency of the bolt cold heading, protecting the mold, prolonging the service life of the mold, improving the stability and efficiency of production, and the electromagnetic valve on the surface of the gas conveying pipe connected with the connecting pipe is opened during the contraction and reset process of the first cylinder, the compressed cold gas in the compressed cold gas storage tank is sprayed out, passes through the gas conveying pipe, the pressure hose, the connecting pipe and the main pipe, and is sprayed out from the airflow channel, the burr and debris generated after polishing are blown out by high-speed airflow, automatic cleaning is completed, at the same time, the cold gas also plays a role in cooling the abrasive, avoiding the problem of continuous polishing and overheating damage of the abrasive, completing automatic cooling, and improving the convenience of use.

[0021] (2), the second cylinder and the blowing pipe are adopted, when the bolt bar is moved out of the mold, the second cylinder is quickly extended and retracted, when the second cylinder is elongated, the electromagnetic valve on the surface of the gas conveying pipe communicated with the blowing pipe is opened, the compressed cold air in the compressed cold air storage tank corresponding to the working position enters the blowing pipe through the gas conveying pipe, the gas outlet end of the blowing pipe is pushed to one side of the mold forming cavity by the second cylinder, the gas outlet end of the blowing pipe is obliquely aligned with the mold forming cavity, the residual dirt in the mold forming cavity is blown away through the cold air, the dirt is prevented from being accumulated, so that the problem of under-impact is reduced, the production stability and efficiency are further improved, meanwhile, the cold air can also synchronously cool the mold, the influence of high temperature caused by long-time use of the mold is avoided, and the service life of the mold is improved.

[0022] (3), the sealing cover is adopted, the sealing cover is arranged outside the cutting working position, the first punching working position, the second punching working position and the third punching working position, and is separated from the outside, meanwhile, the vacuum pump is started, and air in the sealing cover is continuously pumped out, so that the influence of air on the cold heading process is reduced, the generation of cold heading bolt pitting is reduced, and the product quality is improved, meanwhile, the extracted air carries away the metal dust and smoke scattered in the air during cold heading, and the metal dust and smoke are filtered by the filter element, the cleanness of the working environment is improved, and clean production is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a structure schematic view of a bolt cold heading forming device according to an embodiment of the present application;

[0025] Figure 2 It is an internal structure schematic view of an equipment box according to an embodiment of the present application;

[0026] Figure 3 It is an A node enlarged view of a bolt cold heading forming device according to an embodiment of the present application;

[0027] Figure 4 It is an internal structure schematic view of a filter box according to an embodiment of the present application;

[0028] Figure 5 It is an installation schematic view of a blowing pipe according to an embodiment of the present application;

[0029] Figure 6 It is an installation schematic view of a polishing barrel according to an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of the external structure of a blowing pipe according to an embodiment of the present application;

[0031] Figure 8 is a schematic diagram of the side elevation structure of a polishing cylinder according to an embodiment of the present application;

[0032] Figure 9 is a schematic diagram of the external structure of a filter box according to an embodiment of the present application.

[0033] in the drawings:

[0034] 1, cutting station; 2, first punching station; 3, second punching station; 4, third punching station; 5, equipment box; 6, polishing cylinder; 7, first air cylinder; 8, pressure rubber pipe; 9, electromagnetic valve; 10, gas conveying pipe; 11, compressed cold gas storage tank; 12, moving plate; 13, blowing pipe; 14, sealing cover; 15, air extraction pipe; 16, filter box; 17, vacuum pump; 18, brake motor; 19, driving gear; 20, main pipe; 21, driven gear; 22, bearing seat; 23, air flow channel; 24, abrasive; 25, butt joint plate; 26, butt joint bolt; 27, top cover; 28, hole plate; 29, filter element; 30, support; 31, second air cylinder; 32, fixing frame; 33, air rotary connector; 34, connecting pipe; 35, bolt hole. DETAILED DESCRIPTION

[0035] To further illustrate the embodiments, the present application provides drawings, which are part of the disclosure of the present application, mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the related description of the specification. Those of ordinary skill in the art should be able to understand other possible implementations and advantages of the present application by referring to these contents. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0036] According to an embodiment of the present application, a bolt cold heading forming device is provided.

[0037] The present application will be further described in conjunction with the drawings and specific embodiments. As Figures 1-9As shown, according to the bolt cold heading forming device of the embodiment of the application, four workstations are arranged, including a cutting workstation 1, a first punching workstation 2, a second punching workstation 3 and a third punching workstation 4, and a bar is conveyed through a four-workstation clamp conveying device, which is a common device and not shown in the figure, a device box 5 is arranged between the cutting workstation and the first punching workstation 2, and a main pipe 20 is rotatably connected at both ends of the device box 5, the main pipe 20 is a seamless steel pipe with a wall thickness of not less than 2 mm, a driven gear 21 is fixedly sleeved on the surface of the main pipe 20, a polishing cylinder 6 is fixedly connected at one end of the main pipe 20, an abrasive 24 is fixedly connected on the inner wall of the polishing cylinder 6, and an airflow channel 23 is formed on the surface of the polishing cylinder 6 and the abrasive 24, one end of the airflow channel 23 penetrates the inside of the abrasive 24, and the airflow channel 23 is connected with the main pipe 20, a brake motor 18 is fixedly installed in the device box 5, a driving gear 19 is installed at the output end of the brake motor 18, and the driving gear 19 is engaged with the driving gear, which is a common driving structure, a first air cylinder 7 is installed at one end of the device box 5, a support 30 is fixedly installed at one end of the device box 5, a connecting pipe 34 is fixedly connected through the surface of the support 30, and the connecting pipe 34 is rotatably connected with the main pipe 20 through a gas rotary connector 33, which does not affect the rotation of the main pipe 20, a sealing cover 14 is fixedly arranged outside the cutting workstation 1, the first punching workstation 2, the second punching workstation 3 and the third punching workstation 4, a compressed cold gas storage tank 11 is installed outside the sealing cover 14, and a plurality of compressed cold gas storage tanks 11 are arranged, a gas outlet of the compressed cold gas storage tank 11 is connected with a gas conveying pipe 10, an electromagnetic valve 9 is installed on the surface of the gas conveying pipe 10, the other end of the connecting pipe 34 is connected with the gas conveying pipe 10 of one of the compressed cold gas storage tanks 11 through a pressure rubber pipe 8, a blowing pipe 13 is arranged on one side of the first punching workstation 2, the second punching workstation 3 and the third punching workstation 4 corresponding to one side of a mold cavity, one end of the blowing pipe 13 is arranged obliquely, a moving plate 12 is fixedly sleeved on the surface of the blowing pipe 13, a fixing frame 32 is slidingly sleeved on the outer wall of the blowing pipe 13, a second air cylinder 31 is connected between the fixing frame 32 and the moving plate 12, the other end of the blowing pipe 13 is also connected with the gas conveying pipe 10 of the remaining compressed cold gas storage tank 11 through the pressure rubber pipe 8, an air exhaust pipe 15 is connected through the surface of the sealing cover 14, the other end of the air exhaust pipe 15 is connected with a filter box 16, and the other end of the filter box 16 is connected with a vacuum pump 17, wherein, a hole plate 28 is fixedly installed in the filter box 16, a filter core 29 is fixedly installed on one side of the surface of the hole plate 28 close to the air exhaust pipe 15, in the process of cold end of the bolt, the wire is cut to a certain length after passing through the cutting workstation 1, in the process of moving of the bar, the bar passes through between the polishing cylinders 6, the first air cylinder 7 is elongated, at the same time, the brake motor 18 in the device box 5 is started to drive the driving gear 19 to rotate, thereby driving the driven gear 21 to rotate, driving the main pipe 20 to rotate while driving the polishing cylinder 6 to rotate, the elongation of the first air cylinder 7 drives the polishing cylinder 6 in rotation to be sleeved on both ends of the bar to polish both ends of the bar, avoiding that the cutting burrs are brought into the mold, thereby avoiding the problems of being stuck and being punched,The forming efficiency of the bolt cold heading is improved, the die is protected, the service life of the die is prolonged, the stability and efficiency of production are improved, and during the retraction process of the first cylinder 7, the electromagnetic valve 9 on the surface of the gas conveying pipe 10 connected with the connecting pipe 34 is opened, the compressed cold air in the compressed cold air storage tank 11 is sprayed out, passes through the gas conveying pipe 10, the pressure hose 8, the connecting pipe 34 and the main pipe 20, and is sprayed out from the airflow channel 23, the burrs and debris generated after polishing are blown out by high-speed airflow, automatic cleaning is completed, at the same time, the cold air also plays a role in cooling the abrasive 24, avoiding the problem of continuous polishing overheating damage of the abrasive 24, completing automatic cooling, improving the convenience of use, at the same time, when the bolt bar is moved out of the die, the second cylinder 31 is quickly retracted and extended, when the second cylinder 31 is extended, the electromagnetic valve 9 on the surface of the gas conveying pipe 10 connected with the blowing pipe 13 is opened, the compressed cold air in the compressed cold air storage tank 11 corresponding to the working position enters the blowing pipe 13 through the gas conveying pipe 10, the air outlet end of the blowing pipe 13 is pushed to one side of the die forming cavity by the second cylinder 31, the air outlet end of the blowing pipe 13 is obliquely aligned with the die forming cavity, and the residual dirt in the die forming cavity is blown away by spraying cold air, avoiding the accumulation of residual dirt, thereby reducing the problem of under-impact, further improving the production stability and efficiency, at the same time, the cold air can also simultaneously cool the die, avoiding the influence of high temperature caused by long-time use of the die, improving the service life of the die, in addition, the sealing cover 14 is arranged outside the cutting working position 1, the first punching working position 2, the second punching working position 3 and the third punching working position 4, and is separated from the outside, at the same time, the vacuum pump 17 is started, and the air in the sealing cover 14 is continuously pumped out, thereby reducing the influence of air on the cold heading process, reducing the generation of cold heading bolt defects, improving the product quality, at the same time, the extracted air carries the metal dust and smoke scattered in the air during cold heading, and filters the metal dust and smoke through the filter element 29, improving the cleanliness of the working environment and facilitating clean production.

[0038] In one embodiment, the piston rod of the first cylinder 7 is fixedly connected with the equipment box 5, and the rear end cover of the first cylinder 7 is fixedly connected with the inner wall of the sealing cover 14, so as to facilitate the translation of the equipment box 5, wherein a guide plate is fixedly installed on one side surface of the equipment box 5, a guide rod is fixedly installed on the inner wall of the sealing cover 14, and the guide rod penetrates through the guide plate and is slidably connected with the guide plate, so as to guide the movement of the equipment box 5, and the guide rod also plays a role in bearing, avoiding damage to the first cylinder 7.

[0039] In one embodiment, a bearing seat 22 is fixedly installed in the equipment box 5, and the main pipe 20 penetrates through the bearing seat 22 and is rotatably connected with the bearing seat 22, so as to stabilize the rotation of the main pipe 20.

[0040] In one embodiment, the fixed frame 32 is fixedly connected with the sealing cover 14, so as to facilitate the installation of the blowing pipe 13.

[0041] In one embodiment, the piston rod of the second cylinder 31 is fixedly connected with the moving plate 12, and the rear end cover of the second cylinder 31 is fixedly connected with the fixed frame 32, which is a common pushing structure and facilitates the movement of the blowing pipe 13.

[0042] In one embodiment, the top cover 27 is fixedly installed on the top surface of the filter box 16 through screws, and the top cover 27 is sealingly connected with the filter box 16, so that the filter core 29 can be cleaned by opening the top cover 27.

[0043] In one embodiment, the one end of the main pipe 20 is welded with the butt plate 25, and the one end of the polishing cylinder 6 is provided with the bolt hole 35 outside the airflow channel 23, the butt plate 25 is fixedly connected with the bolt hole 35 through the butt bolt 26, and the polishing cylinder 6 is convenient to replace.

[0044] In one embodiment, the inner wall of the abrasive 24 is in a circular truncated cone structure, and the vertical minimum cross-sectional diameter of the abrasive 24 is equal to the designed diameter of the bar material, so as to avoid reducing the diameter of the bar material during polishing.

[0045] Working principle:

[0046] In the process of bolt cold end, the wire is cut into a certain length of bar after cutting in cutting station 1. In the process of moving the bar, the bar passes between the polishing cylinders 6. The first cylinder 7 is extended, and at the same time, the brake motor 18 in the equipment box 5 is started to drive the driving gear 19 to rotate, and then drive the driven gear 21 to rotate, drive the main pipe 20 to rotate while driving the polishing cylinder 6 to rotate. The extension of the first cylinder 7 pushes the rotating polishing cylinder 6 to be connected to the both ends of the bar, and the both ends of the bar are polished to avoid cutting burrs being brought into the mold, thereby avoiding the problems of injury and coiling, improving the forming efficiency of the bolt cold heading, protecting the mold, prolonging the service life of the mold, improving the stability and efficiency of production, and the electromagnetic valve 9 on the surface of the gas conveying pipe 10 connected with the connecting pipe 34 is opened during the retraction of the first cylinder 7. The compressed cold gas in the compressed cold gas storage tank 11 is sprayed out through the gas conveying pipe 10, the pressure hose 8, the connecting pipe 34 and the main pipe 20 from the airflow channel 23. The burrs and debris generated after polishing are blown out by high-speed airflow, and automatic cleaning is completed. At the same time, the cold gas also plays a role in cooling the abrasive 24, avoiding the problem of continuous polishing and overheating damage of the abrasive 24, completing automatic cooling, and improving the convenience of use. At the same time, when the bolt bar is moved out of the mold, the second cylinder 31 is quickly extended and retracted. When the second cylinder 31 is extended, the electromagnetic valve 9 on the surface of the gas conveying pipe 10 connected with the blowing pipe 13 is opened. The compressed cold air in the compressed cold air storage tank 11 corresponding to the station enters the blowing pipe 13 through the gas conveying pipe 10. The gas outlet end of the blowing pipe 13 is pushed to one side of the mold forming cavity by the second cylinder 31. The gas outlet end of the blowing pipe 13 is obliquely aligned with the mold forming cavity. The residual dirt in the mold forming cavity is blown away by spraying cold air, avoiding the accumulation of residual dirt, thereby reducing the problem of under-punching, further improving the production stability and efficiency. At the same time, the cold air can also synchronously cool the mold, avoiding the influence of high temperature caused by long-term use of the mold, improving the service life of the mold. In addition, the sealing cover 14 is arranged outside the cutting station 1, the first punching station 2, the second punching station 3 and the third punching station 4 to form a partition with the outside world. At the same time, the vacuum pump 17 is started to continuously extract the air in the sealing cover 14, thereby reducing the influence of air on the cold heading process, reducing the generation of cold heading bolt defects, improving the product quality, and at the same time, the extracted air carries the metal dust and smoke scattered in the air during cold heading, and the metal dust and smoke are filtered by the filter element 29, improving the cleanliness of the working environment and facilitating clean production.

[0047] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screwing" and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by the person skilled in the art.

[0048] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bolt cold heading forming device, characterized in that, The equipment includes a cutting station (1), a first punch station (2), a second punch station (3), and a third punch station (4). An equipment box (5) is arranged between the cutting station and the first punch station (2). A main pipe (20) is rotatably connected through both ends of the equipment box (5). A driven gear (21) is fixedly sleeved on the surface of the main pipe (20). A grinding cylinder (6) is fixedly connected to one end of the main pipe (20). An abrasive (24) is fixedly connected to the inner wall of the grinding cylinder (6). An airflow channel (23) is opened on the surface of the grinding cylinder (6) and the abrasive (24). The airflow channel (23) is connected through the main pipe (20). The equipment box (5) is fixedly installed with a brake motor (18), and the output end of the brake motor (18) is equipped with a drive gear (19), which meshes with the drive gear. The equipment box (5) is equipped with a first cylinder (7) at one end, and a bracket (30) is fixedly installed at the other end. A connecting pipe (34) is fixedly connected through the surface of the bracket (30), and the connecting pipe (34) is rotatably connected to the main pipe (20) through a pneumatic rotary connector (33). The cutting station (1), the first punch station (2), the second punch station (3), and the third punch station ( 4) The outer fixed cover is equipped with a sealing cover (14), and a compressed cold air storage tank (11) is installed on the outside of the sealing cover (14). There are multiple compressed cold air storage tanks (11). The air outlet of the compressed cold air storage tank (11) is connected to a gas supply pipe (10), and a solenoid valve (9) is installed on the surface of the gas supply pipe (10). The other end of the connecting pipe (34) is connected to the gas supply pipe (10) of one of the compressed cold air storage tanks (11) through a pressure hose (8). The first punch station (2), the second punch station (3), and the third punch station (4) are equipped with an air blowing pipe (1) on one side corresponding to the mold forming cavity side. 3), and a moving plate (12) is fixedly sleeved on the surface of the air blowing pipe (13), and a fixed frame (32) is slidably sleeved on the outer wall of the air blowing pipe (13). A second cylinder (31) is connected between the fixed frame (32) and the moving plate (12). The other end of the air blowing pipe (13) is also connected to the air supply pipe (10) of the remaining compressed cold air storage tank (11) through a pressure hose (8). A suction pipe (15) is connected through the surface of the sealing cover (14), and a filter box (16) is connected through the other end of the suction pipe (15), and a vacuum pump (17) is connected through the other end of the filter box (16).

2. The bolt cold heading forming device according to claim 1, characterized in that, The piston rod of the first cylinder (7) is fixedly connected to the equipment box (5), and the rear end cover of the first cylinder (7) is fixedly connected to the inner wall of the sealing cover (14).

3. The bolt cold heading forming device according to claim 1, characterized in that, The equipment box (5) has a bearing seat (22) fixedly installed inside, and the main pipe (20) passes through the bearing seat (22) and is rotatably connected to the bearing seat (22).

4. The bolt cold heading forming device according to claim 1, characterized in that, The fixing frame (32) is fixedly connected to the sealing cover (14).

5. The bolt cold heading forming device according to claim 1, characterized in that, The piston rod of the second cylinder (31) is fixedly connected to the moving plate (12), and the rear end cover of the second cylinder (31) is fixedly connected to the fixing frame (32).

6. The bolt cold heading forming device according to claim 1, characterized in that, A perforated plate (28) is fixedly installed inside the filter box (16), and a filter element (29) is fixedly installed on one side surface of the perforated plate (28) near the air extraction pipe (15).

7. The bolt cold heading forming device according to claim 1, characterized in that, The top surface of the filter box (16) is fixedly installed with a top cover (27) by screws, and the top cover (27) is sealed to the filter box (16).

8. The bolt cold heading forming device according to claim 1, characterized in that, The main tube (20) has a butt plate (25) welded to one end, and the grinding cylinder (6) has a bolt hole (35) on one end located outside the airflow channel (23). The butt plate (25) is fixedly connected to the bolt hole (35) by a butt bolt (26).

9. A bolt cold heading forming device according to claim 1, characterized in that, The inner wall of the abrasive (24) is a frustum-shaped structure, and the minimum vertical cross-sectional diameter of the abrasive (24) is equal to the design diameter of the bar stock.

10. A bolt cold heading forming apparatus according to claim 1, characterized in that, A guide plate is fixedly installed on one side surface of the equipment box (5), and a guide rod is fixedly installed on the inner wall of the sealing cover (14), and the guide rod passes through the guide plate and is slidably connected to the guide plate.

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