Cold header with positioning structure

Abstract

The cold header with the positioning structure comprises a movable seat, a fixed seat is arranged on one side of the movable seat, clamping devices are installed on one side of the fixed seat and one side of the movable seat, each clamping device comprises an unlocking sleeve, a positioning sleeve, a positioning rod, a clamping groove, a clamping sleeve and a fixing rod, the unlocking sleeve is installed on the outer side of the clamping sleeve, and the positioning rod is installed on the outer side of the clamping sleeve. The multiple clamping sleeves are installed on the outer sides of the positioning sleeve and the positioning rod correspondingly, the clamping grooves are spirally formed in the outer sides of the positioning sleeve and the positioning rod correspondingly, the multiple fixing rods are arrayed on the side walls of the clamping sleeves along a spiral line, and a reinforcing mechanism is arranged on the outer sides of the clamping sleeves and comprises a rotating plate, a fixing block, a reset block, a round rod, a round hole, a reset spring and a fixing groove. The round rod is installed on one side of the unlocking sleeve, a plurality of round holes are formed in the rotating plate, the reset spring is connected with the fixing block and the reset block, and a plurality of fixing grooves are formed in the clamping and fixing groove. The double technical dilemma that a positioning system is tedious and complex to replace, and the design stability of rapid replacement is insufficient is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cold header with positioning structure more specifically, it relates to a kind of cold header with positioning structure. BACKGROUND

[0002] Under the background of the high-speed development of modern precision manufacturing industry, as the key equipment in the field of metal forming processing, positioning column and positioning sleeve as the core components of cold header to ensure the accurate centering of die, its precision and reliability directly determine the dimensional stability of finished product and product quality, however, the design and maintenance problem of positioning column and positioning sleeve has become the important technical bottleneck of restricting the performance of cold header.

[0003] In the prior art of cold header equipment, positioning column and positioning sleeve as precision fit components inevitably face serious wear problems under long-period high-strength working environment: first, the high-frequency vibration and impact force generated in the cold heading forming process constantly causes the contact area of positioning column and positioning sleeve to be worn at micro level, as the cumulative processing period increases, the originally precise fit gap gradually expands;Second, metal particles, impurities in lubricating oil and environmental dust and other foreign matters enter the fit gap, accelerate the wear process, form vicious cycle;Especially in high-speed cold header, hundreds of times of impact per minute further aggravates this wear trend, resulting in small eccentricity or inclination between positioning column and positioning sleeve, further reduces the positioning accuracy, when positioning accuracy decreases to a certain extent, positioning column and positioning sleeve must be replaced, however, the replacement process of traditional positioning system is extremely cumbersome: when disassembling, hydraulic puller, special wrench and the combination of various auxiliary tools are needed, not only prolongs the maintenance time, but also may cause collateral damage to other parts of the equipment;This cumbersome replacement process greatly prolongs the equipment maintenance time, seriously affects production efficiency.

[0004] In view of the problem of complicated replacement of the positioning system, a series of improved positioning structures using quick disassembly and assembly technology have indeed appeared in the industry. However, these improved designs, while improving operational convenience, have serious shortcomings in structural stability and use reliability: most quick replacement structures use a simplified fixing mechanism, which excessively sacrifices structural strength and impact resistance in exchange for operational convenience. In particular, during the cold heading forming process, mechanical impact and vibration act on the simplified fixing structure, causing the fixing element to gradually loosen. More seriously, once the fixing structure is initially loose, the degree of loosening will accelerate in the subsequent processing process. In some extreme cases, it has been observed that the fixed parts develop from initial loosening to complete failure within a few hours. Notably, the early symptoms of loosening of the positioning system are not easy to detect, and attention is not drawn until the product precision deviates significantly. This lack of stability in the technical design results in the positioning column and the positioning sleeve being easily loosened or even completely detached due to factors such as mold impact and equipment vibration during actual cold heading production. This results in product size deviation and batch instability, leading to decreased product precision and increased defect rate. In moderate cases, it can cause mold misalignment and local deformation, accelerating mold wear and damage, increasing mold replacement frequency and maintenance costs. In severe cases, it can cause mold collision and equipment jamming, not only causing sudden stoppage and production interruption, but also potentially causing damage to the main body of the equipment and safety accidents. Practical new type content

[0005] (I) Technical problems solved

[0006] In view of the problems in the prior art, the cold header with a positioning structure is provided to solve the technical problems mentioned in the background art.

[0007] (II) Technical solutions

[0008] To achieve the above object, the utility model provides the following technical scheme: A cold header with positioning structure, including movable seat, the movable seat one side is equipped with fixed seat, the fixed seat and movable seat one side all install clamping device, the clamping device includes unlocking sleeve, positioning sleeve, positioning rod, clamping groove, clamping sleeve and fixed rod, the unlocking sleeve sliding installation is in clamping sleeve outside, multiple clamping sleeve is detachable installation in positioning sleeve and positioning rod outside respectively, the clamping groove is respectively set up in the spiral shape in positioning sleeve and positioning rod outside, multiple fixed rod is along spiral line array in clamping sleeve side wall, and the fixed rod sliding installation is in clamping sleeve side wall, clamping sleeve outside is provided with reinforcing mechanism, the reinforcing mechanism includes turning plate, fixed block, reset block, round rod, round hole, reset spring and fixed groove, the turning plate rotation is installed in clamping sleeve outside, the fixed block is fixedly installed in clamping sleeve outside, the reset block is fixedly installed in one side of turning plate, the round rod is fixedly installed in one side of unlocking sleeve, multiple round holes are set up on the turning plate, the reset spring both ends are connected with fixed block and reset block respectively, multiple fixed grooves are set up in clamping groove.

[0009] The utility model further sets up, movable seat one side is equipped with hydraulic pressure jar, hydraulic pressure jar output and movable seat are detachably connected, hydraulic pressure jar is detachably installed on external device.

[0010] The utility model further sets up, and the positioning rod outside and positioning sleeve one side are all fixedly equipped with limit board.

[0011] The utility model further sets up, and the fixed block is set up reset hole in, and reset rod is connected in one side of reset hole, and one end of reset rod slidingly penetrates reset hole.

[0012] The utility model further sets up, and the unlocking sleeve inside is set up guide groove, and the guide rail is fixedly arranged on the outer wall of clamping sleeve, and the guide groove is adapted with the guide rail.

[0013] The utility model further sets up, and the round rod outside movable sleeve is equipped with top spring, and one end of top spring is connected with unlocking sleeve, and the other end of top spring is abutted on one side of turning plate.

[0014] The utility model further sets up, and the clamping sleeve outside movable is equipped with movable spring, and the outer end of fixed rod is connected with the outer wall of clamping sleeve through movable spring.

[0015] The utility model further sets up, and the fixed rod end and fixed groove inner wall edge all adopt rounded corner structure design.

[0016] (Three) beneficial effects

[0017] Compared with the prior art, the utility model provides a cold header with positioning structure, has the following beneficial effects:

[0018] 1. The clamping device successfully solves the core technical problem of the complicated replacement of the positioning system in the existing cold heading equipment field through the innovative combination of the unlocking sleeve, the positioning sleeve, the positioning rod, the clamping groove, the clamping sleeve and the fixing rod. The significant advantages of the clamping device are as follows: first, the cooperation of the spiral clamping groove and the fixing rod realizes the quick disassembly and assembly of the positioning rod and the positioning sleeve, and the traditional special wrench and other professional tool combinations are no longer needed; when replacing the positioning system, only simple rotation and sliding operations are needed to complete the disassembly, greatly simplifying the maintenance process; the limiting plates on the outer side of the positioning rod and the side surface of the positioning sleeve provide accurate positioning reference for assembly, ensuring the positional consistency when repeatedly installed; the operation of the entire clamping device does not require any auxiliary tools, and the entire disassembly and assembly process can be completed through manual operation, greatly improving the maintenance efficiency; compared with the traditional positioning system which needs to completely disassemble multiple components and may even damage the surrounding equipment, the design realizes the accurate directional disassembly of the positioning system, maximally reduces the risk of misoperation and the possibility of incidental damage, and the innovative clamping device design completely overturns the traditional maintenance mode of the cold header positioning system, which is complicated, time-consuming and requires high technical requirements, realizes the quick and convenient replacement of the positioning rod and the positioning sleeve, greatly reduces the maintenance time and technical threshold, effectively reduces the equipment downtime, improves the production efficiency, and is especially suitable for application in the modern precision manufacturing environment with high-speed production and low downtime requirements, providing a solid technical guarantee for the stable operation and efficiency improvement of the cold heading forming process.

[0019] 2、The key problem that the positioning system is easy to loosen and fall off in a high-frequency impact and vibration environment is solved through the ingenious cooperation of the reinforcing mechanism, the rotating plate, the fixing block, the reset block, the round rod, the round hole, the reset spring and the fixing groove, and the reinforcing mechanism has the following advantages: the rotating connection design of the rotating plate and the clamping sleeve enables the rotating plate to be flexibly adjusted in position when needed, and the rotating plate remains stable in the locked state; the integrated design of the reset block and the rotating plate enables the two to work cooperatively and provides an automatic reset function; the accurate arrangement of the round hole on the rotating plate enables the round hole to be aligned with the round rod only at a specific rotating angle, thereby increasing the anti-misoperation function; the reset spring provides a continuous elastic reset force between the fixing block and the reset block, thereby ensuring that the system is automatically locked when not in operation; the ingenious layout of the fixing groove in the clamping groove provides a secondary locking point for the fixing rod, thereby greatly improving the locking performance; the cooperation of the guide rail and the guide groove not only guides the moving direction of the unlocking sleeve, but also provides additional lateral support; the elastic connection of the movable spring between the fixing rod and the clamping sleeve ensures the freedom of the fixing rod and provides a reset force, thereby ensuring that the fixing rod always tries to return to the locked position; the reinforcing mechanism design with multiple locking and automatic reset functions effectively prevents the loosening or falling off of the positioning system caused by mold clamping impact and equipment vibration, fundamentally eliminates the risk of a decrease in positioning accuracy, avoids a series of chain reactions such as product size deviation, batch instability and mold misalignment and collision, significantly improves the running reliability and product quality stability of the cold header under harsh working conditions, reduces the generation of defective products and sudden equipment shutdown caused by inaccurate positioning, provides a more reliable positioning solution for modern high-speed precision cold heading machining, and is particularly suitable for precision part forming and large-batch automatic production lines with extremely high precision requirements, thereby injecting new technical power into the quality and efficiency of the manufacturing industry. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic diagram of the cold header with the positioning structure in the utility model.

[0021] Figure 2 It is a dispersed structure schematic diagram of the positioning sleeve part and the clamping sleeve part in the utility model.

[0022] Figure 3 It is a dispersed sectional structure schematic diagram of the positioning rod part and the clamping sleeve part in the utility model.

[0023] Figure 4 It is a structure schematic diagram of the clamping sleeve part in the utility model.

[0024] Figure 5 It is a dispersed sectional structure schematic diagram of the clamping sleeve part in the utility model.

[0025] In the figure: 1, movable seat; 2, fixed seat; 3, unlocking sleeve; 4, positioning sleeve; 5, positioning rod; 6, clamping groove; 7, clamping sleeve; 8, fixed rod; 9, rotating plate; 10, fixed block; 11, reset block; 12, round rod; 13, round hole; 14, reset spring; 15, fixed groove; 16, hydraulic cylinder; 17, limiting plate; 18, reset hole; 19, reset rod; 20, guide groove; 21, guide rail; 22, top spring; 23, movable spring. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0028] In the present application, unless otherwise specified, the directions used such as "up, down" are generally with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for the convenience of understanding and description, "left, right" are generally with respect to the left and right shown in the drawings; "inner, outer" refer to the inner and outer with respect to the contour of each component itself, but the above directional words are not used to limit the present application.

[0029] Please refer to Figures 1-5 A cold header with positioning structure, comprising a movable seat 1, the movable seat 1 is provided with a fixed seat 2 on one side, the fixed seat 2 and the movable seat 1 are provided with clamping devices on one side, the clamping devices comprise an unlocking sleeve 3, a positioning sleeve 4, a positioning rod 5, a clamping groove 6, a clamping sleeve 7 and a fixed rod 8, the unlocking sleeve 3 is slidingly installed on the outside of the clamping sleeve 7, a plurality of clamping sleeves 7 are respectively detachably installed on the outside of the positioning sleeve 4 and the positioning rod 5, the clamping grooves 6 are respectively formed in a spiral shape on the outside of the positioning sleeve 4 and the positioning rod 5, a plurality of fixed rods 8 are arranged along the spiral line on the side wall of the clamping sleeve 7, and the fixed rods 8 are slidingly installed on the side wall of the clamping sleeve 7, the outside of the clamping sleeve 7 is provided with a reinforcing mechanism, the reinforcing mechanism comprises a rotating plate 9, a fixed block 10, a reset block 11, a round rod 12, a round hole 13, a reset spring 14 and a fixed groove 15, the rotating plate 9 is rotatably installed on the outside of the clamping sleeve 7, the fixed block 10 is fixedly installed on the outside of the clamping sleeve 7, the reset block 11 is fixedly installed on one side of the rotating plate 9, the round rod 12 is fixedly installed on one side of the unlocking sleeve 3, a plurality of round holes 13 are formed on the rotating plate 9, the reset spring 14 is connected at both ends to the fixed block 10 and the reset block 11, and a plurality of fixed grooves 15 are formed in the clamping groove 6.

[0030] The movable seat 1 is provided with a hydraulic cylinder 16 on one side, the output end of the hydraulic cylinder 16 is detachably connected with the movable seat 1, and the hydraulic cylinder 16 is detachably installed on an external device.

[0031] In this embodiment, when the positioning sleeve 4 and the positioning rod 5 need to be replaced, the positioning rod 5 and the positioning sleeve 4 are first removed. First, the rotating plate 9 is rotated forward, so that the rotating plate 9 drives the circular hole 13 to rotate forward, and the rotating plate 9 drives the reset block 11 to rotate forward, and then the reset block 11 drives the reset rod 19 to rotate forward along the reset hole 18, and the reset block 11 and the fixed block 10 cooperate to press the reset spring 14. When the reset spring 14 is pressed to the limit, the circular hole 13 is just rotated to the position concentric with the circular rod 12. Then the unlocking sleeve 3 is pushed, the unlocking sleeve 3 slides along the guide rail 21 and the guide groove 20, and the unlocking sleeve 3 drives the circular rod 12 to penetrate into the circular hole 13, and at the same time the unlocking sleeve 3 cooperates with the rotating plate 9 to press the top spring 22. Then the inner wall of the unlocking sleeve 3 no longer limits the outer side of the fixed rod 8. Then the clamping sleeve 7 is pulled to one side with force, the clamping sleeve 7 drives the plurality of fixed rods 8 to move, and then the inner wall of the fixed groove 15 presses one end of the fixed rod 8 to make one end of the fixed rod 8 slide out of the fixed groove 15. Then continue to pull the clamping sleeve 7, the fixed rod 8 will slide out of the clamping groove 6, and then the clamping sleeve 7 is completely removed. Then pull the positioning rod 5 or the positioning sleeve 4 to the other side to remove the positioning rod 5 or the positioning sleeve 4. Then refer to the above steps to remove the other positioning rod 5 and the positioning sleeve 4.

[0032] Please refer to Figures 3-5 , as a further embodiment of the whole device: the outer side of the positioning rod 5 and one side of the positioning sleeve 4 are fixedly provided with a limiting plate 17.

[0033] The fixed block 10 is provided with a reset hole 18, and the reset hole 18 is connected with a reset rod 19 on one side. One end of the reset rod 19 slides into the reset hole 18.

[0034] The inner side of the unlocking sleeve 3 is provided with a guide groove 20, and the outer wall of the clamping sleeve 7 is fixedly provided with a guide rail 21. The guide groove 20 is matched with the guide rail 21.

[0035] The outer side of the circular rod 12 movably sleeves a top spring 22. One end of the top spring 22 is connected with the unlocking sleeve 3, and the other end of the top spring 22 abuts against one side of the rotating plate 9.

[0036] The outer side of the clamping sleeve 7 movably sleeves a movable spring 23. The outer end of the fixed rod 8 is connected with the outer wall of the clamping sleeve 7 through the movable spring 23.

[0037] The end of the fixed rod 8 and the edge of the fixed groove 15 are designed in a round corner structure.

[0038] More specifically, when the positioning rod 5 and the positioning sleeve 4 are removed, the positioning rod 5 and the positioning sleeve 4 are replaced, and when the positioning rod 5 and the positioning sleeve 4 are replaced, the positioning rod 5 is passed from one side of the fixed seat 2, then the clamping sleeve 7 is sleeved on the outside of the positioning rod 5 from the other side, then the plurality of fixing rods 8 gradually enter the clamping groove 6, so that one side of the clamping sleeve 7 and the limiting plate 17 is close to one side of the fixed seat 2, then the clamping sleeve 7 is rotated forward, so that the clamping sleeve 7 drives the plurality of fixing rods 8 to rotate forward along the clamping groove 6, then the clamping sleeve 7 and the limiting plate 17 gradually cooperate to compress the fixed seat 2, and at this time one end of the fixing rod 8 moves to the position corresponding to the original fixed groove 15, then the movable spring 23 resets to pull the fixing rod 8 to insert into the original fixed groove 15, then the unlocking sleeve 3 is loosened, the top spring 22 pushes the unlocking sleeve 3 to drive the round rod 12 to slide along the guide rail 21 and the guide groove 20 to reset, then when the top spring 22 is completely reset, the round rod 12 is no longer limited by the round hole 13 of the rotating plate 9, then the reset spring 14 pushes the reset block 11 to rotate and reset, then the reset block 11 drives the reset rod 19 to rotate along the reset hole 18 to reset, then the reset block 11 drives the rotating plate 9 to rotate and reset, so that the rotating plate 9 drives the round hole 13 to rotate and reset to the position not corresponding to the round rod 12, then the round rod 12 stably supports the unlocking sleeve 3, cooperates with the guide rail 21 and the guide groove 20 to limit the unlocking sleeve 3, so that the unlocking sleeve 3 cannot slide, then the inner wall of the unlocking sleeve 3 limits the outer end of the fixing rod 8, so that the fixing rod 8 and the fixed groove 15 cooperate to lock the positioning rod 5 and the clamping sleeve 7, so that they cannot rotate relative to each other, ensuring stable installation, then other positioning rods 5 and positioning sleeves 4 are installed according to the above steps.

[0039] In summary, the overall device in use or operation: when the need to replace the positioning sleeve 4 and positioning rod 5, to be removed first positioning rod 5 and positioning sleeve 4, first positive rotation of the rotating plate 9, so that the rotating plate 9 drive the hole 13 positive rotation, and rotating plate 9 will drive the reset block 11 positive rotation, then the reset block 11 drive reset rod 19 along the reset hole 18 positive rotation, and reset block 11 and fixed block 10 reset spring 14 compression cooperation, when the reset spring 14 is squeezed to the limit, the hole 13 just rotate to the same position with the round rod 12 concentric, then push the unlocking sleeve 3, the unlocking sleeve 3 along the guide rail 21 and guide slot 20 sliding, and the unlocking sleeve 3 drive the round rod 12 into the hole 13, while the unlocking sleeve 3 will and rotating plate 9 cooperation on the top spring 22 extrusion, then the inner wall of the unlocking sleeve 3 no longer on the outside of the fixed rod 8 limit, then pull the card fixed sleeve 7 to one side with force, card fixed sleeve 7 drive multiple fixed rod 8 movement, then the fixed slot 15 inner wall of the fixed rod 8 one end extrusion, so that the fixed rod 8 one end from the fixed slot 15 slide, then continue to pull the card fixed sleeve 7, the fixed rod 8 will slide out of the card fixed slot 6, then realize the card fixed sleeve 7 completely removed, then pull the positioning rod 5 or positioning sleeve 4 to the other side, namely the positioning rod 5 or positioning sleeve 4 can be removed, then refer to the above steps will be removed other positioning rod 5 and positioning sleeve 4.

[0040] When the positioning rod 5 and the positioning sleeve 4 are removed, the positioning rod 5 and the positioning sleeve 4 are replaced, and when the positioning rod 5 and the positioning sleeve 4 are replaced, the positioning rod 5 is passed from one side of the fixed seat 2, then the clamping sleeve 7 is sleeved on the outside of the positioning rod 5 from the other side, then the plurality of fixed rods 8 gradually enter the clamping groove 6, so that the clamping sleeve 7 and the limiting plate 17 on one side are close to the fixed seat 2 on one side, then the clamping sleeve 7 is rotated in the positive direction, so that the clamping sleeve 7 drives the plurality of fixed rods 8 to rotate in the positive direction along the clamping groove 6, then the clamping sleeve 7 and the limiting plate 17 gradually cooperate to compress the fixed seat 2, and at this time the fixed rod 8 moves to the position corresponding to the original fixed groove 15, then the movable spring 23 resets to pull the fixed rod 8 to insert into the original fixed groove 15, then the unlocking sleeve 3 is loosened, the top spring 22 pushes the unlocking sleeve 3 to drive the round rod 12 to slide along the guide rail 21 and the guide groove 20 to reset, then when the top spring 22 is completely reset, the round rod 12 is no longer limited by the round hole 13 of the rotating plate 9, then the reset spring 14 pushes the reset block 11 to rotate and reset, then the reset block 11 drives the reset rod 19 to rotate and reset along the reset hole 18, then the reset block 11 drives the rotating plate 9 to rotate and reset, so that the rotating plate 9 drives the round hole 13 to rotate and reset to a position not corresponding to the round rod 12, then the round rod 12 stably supports the unlocking sleeve 3, and cooperates with the guide rail 21 and the guide groove 20 to limit the unlocking sleeve 3, so that the unlocking sleeve 3 cannot slide, then the inner wall of the unlocking sleeve 3 limits the outer end of the fixed rod 8, so that the fixed rod 8 and the fixed groove 15 cooperate to lock the positioning rod 5 and the clamping sleeve 7, so that they cannot rotate relative to each other, ensuring stable installation, and then other positioning rods 5 and positioning sleeves 4 can be installed according to the above steps.

[0041] In all the above-mentioned solutions, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut cooperation connection, bolt or screw connection, or other known connection methods, which will not be described one by one. In the above, when the fixed connection is involved, welding is preferred. Although embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A cold heading machine with a positioning structure, comprising a movable base (1), wherein a fixed base (2) is provided on one side of the movable base (1), characterized in that: Both the fixed seat (2) and the movable seat (1) are equipped with a locking device on one side. The locking device includes an unlocking sleeve (3), a positioning sleeve (4), a positioning rod (5), a locking groove (6), a locking sleeve (7), and a fixing rod (8). The unlocking sleeve (3) is installed on the outside of the locking sleeve (7). Multiple locking sleeves (7) are respectively installed on the outside of the positioning sleeve (4) and the positioning rod (5). The locking groove (6) is spirally opened on the outside of the positioning sleeve (4) and the positioning rod (5). Multiple fixing rods (8) are arranged along the spiral line on the side wall of the locking sleeve (7). A reinforcement mechanism is provided on the outside of the locking sleeve (7). The reinforcement mechanism includes a rotating plate (9), a fixing block (10), a reset block (11), a round rod (12), a round hole (13), a reset spring (14), and a fixing groove (15). The rotating plate (9) is installed on the outside of the locking sleeve (7), the fixing block (10) is installed on the outside of the locking sleeve (7), the reset block (11) is installed on one side of the rotating plate (9), the round rod (12) is installed on one side of the unlocking sleeve (3), multiple round holes (13) are opened on the rotating plate (9), the reset spring (14) is connected to the fixing block (10) and the reset block (11), and multiple fixing grooves (15) are opened in the locking groove (6).

2. A cold heading machine with a positioning structure according to claim 1, characterized in that: A hydraulic cylinder (16) is provided on one side of the movable seat (1). The output end of the hydraulic cylinder (16) is detachably connected to the movable seat (1). The hydraulic cylinder (16) can be detachably installed on an external device.

3. A cold heading machine with a positioning structure according to any one of claims 1 or 2, characterized in that: A limiting plate (17) is fixedly provided on the outer side of the positioning rod (5) and on one side of the positioning sleeve (4).

4. A cold heading machine with a positioning structure according to claim 1, characterized in that: The fixing block (10) has a reset hole (18), and a reset rod (19) is connected to one side of the reset hole (18). One end of the reset rod (19) slides into the reset hole (18).

5. A cold heading machine with a positioning structure according to claim 4, characterized in that: The inner side of the unlocking sleeve (3) is provided with a guide groove (20), and the outer wall of the locking sleeve (7) is fixed with a guide rail (21). The guide groove (20) is adapted to the guide rail (21).

6. A cold heading machine with a positioning structure according to claim 5, characterized in that: A top spring (22) is movably sleeved on the outside of the round rod (12). One end of the top spring (22) is connected to the unlocking sleeve (3), and the other end of the top spring (22) abuts against one side of the rotating plate (9).

7. A cold heading machine with a positioning structure according to claim 3, characterized in that: The outer side of the retaining sleeve (7) is provided with a movable spring (23), and the outer end of the fixing rod (8) is connected to the outer wall of the retaining sleeve (7) through the movable spring (23).

8. A cold heading machine with a positioning structure according to claim 7, characterized in that: The ends of the fixing rod (8) and the inner edge of the fixing groove (15) are both designed with rounded corners.

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