Cold header with reversible die holder

Abstract

The utility model relates to cold header can overturn clamp structure, aims at solving current cold header can overturn clamp structure to rely on cylinder drive and block limiting, impact big when overturning in place, lead to positioning pin and hole fit gap increase, positioning deviation is bigger after long -term use, influence cold header workpiece size precision, and the angle of rotation is fixed, cannot adapt the non - standard angle demand of special process technical problem, including clamp rail frame, one end of clamp rail frame is fixedly connected with the turnover shaft, the outside fixed connection of turnover shaft has the turnover speed regulation cam, the turnover speed regulation cam is divided into acceleration section, uniform speed section and deceleration section, the side of turnover speed regulation cam is pasted with the adjusting roller, the both sides rotation of adjusting roller is connected in the one end of mounting frame, the utility model discloses through three -segment type profile design control clamp overturning speed, adapts the action demand of different stages in cold header processing, reduces the impact force of clamp mechanism overturning in place.

Description

Technical Field

[0001] This utility model relates to the field of clamp structures, specifically a flip-up clamp structure for a cold heading machine. Background Technology

[0002] In the cold heading process of fasteners and hardware parts, clamps are the core components for material clamping and angle adjustment. Their flipping stability, clamping accuracy, and adaptability directly determine the product processing quality and production efficiency. Cold heading requires frequent clamping, flipping, and positioning of materials. Existing cold heading machine clamp structures still face many technical challenges when dealing with the demands of multi-specification materials, high-speed processing, and precise positioning.

[0003] In the process of developing this utility model, the inventors discovered that at least the following problems remain unresolved in the existing technology: During use, the traditional cold heading machine's reversible clamp structure relies on cylinder drive and stop block limitation, resulting in a large impact when tilted into position. This leads to an increased clearance between the positioning pin and the hole, causing significant positioning deviation after long-term use and affecting the dimensional accuracy of the cold-headed workpiece. Furthermore, the fixed tilting angle cannot adapt to the non-standard angle requirements of special processes. Therefore, a new technical solution needs to be designed to address these issues. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a flip-up clamp structure for cold heading machines. This solves the technical problems of the current flip-up clamp structure for cold heading machines, which relies on cylinder drive and stop block limit, resulting in a large impact when flipped into place, which leads to an increase in the clearance between the positioning pin and the hole, and a large positioning deviation after long-term use, affecting the dimensional accuracy of the cold-headed workpiece; and the fixed flipping angle, which cannot adapt to the non-standard angle requirements of special processes.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a flip-type clamp structure for a cold heading machine is designed, including a clamp track frame. One end of the clamp track frame is fixedly connected to a flip shaft. A flip speed-regulating cam is fixedly connected to the outside of the flip shaft. The flip speed-regulating cam is divided into an acceleration section, a constant speed section, and a deceleration section. An adjusting roller is attached to one side of the flip speed-regulating cam. Both sides of the adjusting roller are rotatably connected to one end of a mounting frame. The other end of the mounting frame is connected to a first spring through a guide post. A drive worm gear is mounted on one side of the flipping speed regulating cam, a worm is engaged below the drive worm gear, a limiting ratchet plate is engaged above the drive worm gear, the other end of the limiting ratchet plate is fixedly connected to one end of the guide rod, and a second spring is sleeved on the outside of the guide rod.

[0006] Preferably, one end of the guide post is fixedly connected to the other end of the mounting bracket, the other end of the guide post extends movably through the interior of the connecting plate and extends to its other side, the first spring is sleeved on the outside of the guide post, one end of the first spring abuts against one side of the mounting bracket, and the other end of the first spring abuts against one side of the connecting plate.

[0007] Preferably, the center of the drive worm gear is fixedly connected to the outside of the flip shaft, the other end of the drive worm gear is rotatably connected to the inside of one end of the frame, and is fixedly connected to the output end of the drive motor, and the mounting end of the drive motor is fixedly connected to one end of the frame.

[0008] Preferably, the other end of the guide rod extends movably through the interior of one end of the L-shaped support plate, one end of the second spring abuts against one end of the limiting ratchet plate, the other end of the second spring abuts against the bottom surface of the L-shaped support plate, and the other end of the L-shaped support plate is fixedly connected to the top of the frame.

[0009] Preferably, the other end of the flipping shaft is rotatably connected to the inside of the frame, and the two ends of the clamp track frame are symmetrically provided with U-shaped grooves, and a support arm is slidably connected inside the U-shaped groove.

[0010] Preferably, the other end of the support arm is fixedly connected to both sides of the clamp body, and one end of the clamp body is slidably connected inside the clamp track frame and is threadedly connected to the external thread of the bidirectional threaded screw inside it.

[0011] Preferably, the two ends of the bidirectional threaded screw are rotatably connected to the inner wall of the clamp track frame, one end of which is fixedly connected to the output end of the servo motor, and the mounting end of the servo motor is fixedly connected to one end outside the clamp track frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When the rotating speed-regulating cam of this invention rotates, its different contour segments push the adjusting roller to drive the mounting bracket to move along the guide post. The first spring outside the guide post absorbs the impact force of the cam's push through elastic deformation, while providing continuous contact pressure for the adjusting roller, ensuring that the roller is always in close contact with the cam contour. The acceleration segment enables the clamp to quickly rotate to near the target angle, the constant speed segment ensures that the clamp rotation process is smooth, and the deceleration segment enables the clamp to slowly reset or stop. The three-segment contour design controls the clamp rotation speed, adapting to the action requirements of different stages in cold heading, and reducing the impact force when the clamp mechanism rotates to the correct position. By applying continuous downward pressure to the limiting ratchet plate through elastic deformation, the toothed end of the limiting ratchet plate is always engaged with the toothed end of the drive worm gear. Utilizing the one-way locking characteristic of the ratchet, the worm gear is only allowed to rotate in the working direction of the clamp's flipping, preventing it from rotating in the opposite direction due to material gravity, vibration, or other factors. This avoids accidental reset after the clamp flips, ensuring the stability of the clamp position during cold heading. If reverse flipping adjustment is required, simply overcome the spring force of the second spring and pull the guide rod upward to disengage the limiting ratchet plate from the worm gear. This achieves the dual functions of locking to prevent reverse flipping and flexible adjustment, improving the safety of equipment operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the left side of this utility model.

[0014] Figure 2 This is a schematic diagram on the right side of the present invention.

[0015] Figure 3 This is a schematic diagram of the structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the installation of the flip-type speed regulating convex part of this utility model.

[0017] Figure 5 This is a schematic diagram of the limiting ratchet plate structure of this utility model.

[0018] In the diagram: 1. Clamp rail frame; 11. Tilting shaft; 12. Tilting speed regulating cam; 13. Adjusting roller; 14. Mounting bracket; 15. Guide post; 16. First spring; 17. Drive worm gear; 18. Worm; 19. Limiting ratchet plate; 2. Guide rod; 21. Second spring; 22. Connecting plate; 23. Frame; 24. Drive motor; 25. L-shaped support plate; 26. T-shaped slide groove; 27. Support arm; 28. Clamp body; 29. ​​Two-way threaded screw; 3. Servo motor. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1: Reversible clamp structure for cold heading machine, see [link / reference] Figures 1 to 5The system includes a clamp track frame 1, with a flip shaft 11 fixedly connected to one end of the clamp track frame 1. A flip speed regulating cam 12 is fixedly connected to the outside of the flip shaft 11. The flip speed regulating cam 12 is divided into an acceleration section, a constant speed section, and a deceleration section. An adjusting roller 13 is attached to one side of the flip speed regulating cam 12. The two sides of the adjusting roller 13 are rotatably connected to one end of the mounting frame 14. The other end of the mounting frame 14 is connected to a first spring 16 through a guide post 15. One end of the guide post 15 is fixedly connected to the other end of the mounting frame 14. The other end of the guide post 15 moves through the interior of the connecting plate 22 and extends to its other side. The first spring 16 is sleeved on the outside of the guide post 15. One end of the first spring 16 abuts against one side of the mounting frame 14, and the other end of the first spring 16 abuts against one side of the connecting plate 22. The drive motor 24 provides the core power for the clamp's rotation. Its output end drives the worm gear 18 to rotate, and the worm gear 18 drives the worm wheel 17 to rotate through tooth meshing. The center of the worm wheel is fixed outside the rotating shaft 11, thereby driving the rotating shaft 11 to rotate synchronously with the clamp track frame 1, realizing the rotation action of the clamp body 28 (adapting to the angle adjustment requirements of materials in cold heading). The rotating speed regulating cam 12 outside the rotating shaft 11 is divided into an acceleration section, a constant speed section, and a deceleration section, which fits with the adjusting roller 13 to form a speed regulating structure: when the rotating speed regulating cam 12 rotates, its different contour sections push the adjusting roller. 13 drives the mounting bracket 14 to move along the guide post 15. The first spring 16 outside the guide post 15 absorbs the impact force pushed by the cam through elastic deformation, and at the same time provides continuous contact pressure for the adjusting roller 13, ensuring that the roller is always in close contact with the cam profile. The acceleration section makes the clamp quickly rotate to near the target angle. The constant speed section ensures that the clamp rotation process is smooth (avoiding material deviation due to inertia). The deceleration section realizes the clamp slowly reset or stops. The clamp rotation speed is controlled by the three-stage profile design, which adapts to the action requirements of different stages in cold heading and reduces the impact force of the clamp mechanism rotating into place.

[0020] A drive worm gear 17 is installed on one side of the flip speed regulating cam 12. A worm 18 is meshed below the drive worm gear 17. The center of the drive worm gear 17 is fixedly connected to the outside of the flip shaft 11. The other end of the drive worm gear 17 is rotatably connected to the inside of one end of the frame 23 and is fixedly connected to the output end of the drive motor 24. The mounting end of the drive motor 24 is fixedly connected to one end of the frame 23. A limiting ratchet plate 19 meshes above the drive worm gear 17. The other end of the limiting ratchet plate 19 is fixedly connected to one end of the guide rod 2. A second spring 21 is sleeved on the outside of the guide rod 2. The other end of the guide rod 2 moves through the inside of one end of the L-shaped support plate 25. One end of the second spring 21 abuts against one end of the limiting ratchet plate 19. The other end of the second spring 21 abuts against the bottom surface of the L-shaped support plate 25. The other end of the L-shaped support plate 25 is fixedly connected to the top of the frame 23. The limiting ratchet plate 19, which engages above the drive worm gear 17, together with the guide rod 2 and the second spring 21, forms an elastic locking structure. The second spring 21 is sleeved on the outside of the guide rod 2, with its two ends abutting against the limiting ratchet plate 19 and the bottom surface of the L-shaped support plate, respectively. Through elastic deformation, it applies continuous downward pressure to the limiting ratchet plate 19, ensuring that the toothed end of the limiting ratchet plate 19 is always engaged with the toothed end of the drive worm gear 17. Utilizing the one-way locking characteristic of the ratchet, the worm gear is only allowed to rotate in the working direction of the clamp's flipping, preventing it from rotating in the opposite direction due to material gravity, vibration, or other factors. This avoids accidental reset after the clamp flips, ensuring the stability of the clamp position during cold heading. If reverse flipping adjustment is required, simply overcome the elastic force of the second spring 21 and pull the guide rod 2 upwards to disengage the limiting ratchet plate 19 from the worm gear. This achieves the dual functions of locking to prevent reverse rotation and flexible adjustment, improving the safety of equipment operation.

[0021] For details, see Figures 1 to 3 The other end of the flip shaft 11 is rotatably connected to the inside of the frame 23. The two ends of the clamp rail frame 1 are symmetrically provided with convex-shaped grooves 26. The inside of the convex-shaped grooves 26 is slidably connected to the support arm 27. The other end of the support arm 27 is fixedly connected to both sides of the clamp body 28. One end of the clamp body 28 is slidably connected to the inside of the clamp rail frame 1 and is threadedly connected to the outside of the bidirectional threaded screw 29 inside it. The two ends of the bidirectional threaded screw 29 are rotatably connected to the inner wall of the clamp rail frame 1. One end is fixedly connected to the output end of the servo motor 3. The mounting end of the servo motor 3 is fixedly connected to one end outside the clamp rail frame 1. The other end of the flipping shaft 11 is rotatably connected inside the frame 23, providing bidirectional support for the clamping track frame 1. This ensures that the clamping track frame 1 does not shake or shift during the flipping process, thus improving the flipping stability. The U-shaped grooves 26 at both ends of the clamping track frame 1 form a precise sliding fit with the support arm 27. The U-shaped structure restricts the support arm 27 to move only in a straight line along the groove, preventing the clamping body 28 from shifting laterally or tilting during the opening and closing process. The support arm 27 is fixed on both sides of the clamping body 28, providing stable support for the clamping body 28 and ensuring that the clamping body 28 is subjected to uniform force when clamping materials, thus preventing the material from being clamped skewed due to unilateral force. After the servo motor 3 starts, its output end drives the bidirectional threaded screw 29 inside the clamp track frame 1 to rotate. The threaded connection between the bidirectional threaded screw 29 and the clamp body 28 converts the rotational power into linear driving force. Since the threads at both ends of the bidirectional threaded screw 29 are in opposite directions, when rotating, it can drive the clamp body 28 to move synchronously in opposite directions along the track frame, realizing the opening and closing action of the clamp. When moving in opposite directions, the clamping distance is reduced to accommodate finer materials; when moving in opposite directions, the distance is increased to accommodate coarser materials, realizing flexible adaptation to materials of different diameters. The servo motor 3 has the characteristic of precise and controllable speed, which can accurately adjust the clamping speed and clamping distance to ensure that the material clamping force is moderate (avoiding over-clamping and damage to the material or clamping too loosely and causing the material to fall off), adapting to the clamping requirements of different specifications of materials in cold heading, and improving processing adaptability and stability.

[0022] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0023] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A reversible clamp structure for a cold heading machine, comprising a clamp track frame (1), characterized in that, One end of the clamp track frame (1) is fixedly connected to a flip shaft (11), and a flip speed regulating cam (12) is fixedly connected to the outside of the flip shaft (11). The flip speed regulating cam (12) is divided into an acceleration section, a constant speed section and a deceleration section. An adjusting roller (13) is attached to one side of the flip speed regulating cam (12). The two sides of the adjusting roller (13) are rotatably connected to one end of the mounting frame (14). The other end of the mounting frame (14) is connected to a first spring (16) through a guide post (15). A drive worm gear (17) is installed on one side of the flip speed regulating cam (12), a worm (18) is engaged below the drive worm gear (17), a limiting ratchet plate (19) is engaged above the drive worm gear (17), the other end of the limiting ratchet plate (19) is fixedly connected to one end of the guide rod (2), and a second spring (21) is sleeved on the outside of the guide rod (2).

2. The reversible clamp structure for a cold heading machine as described in claim 1, characterized in that, One end of the guide post (15) is fixedly connected to the other end of the mounting bracket (14), and the other end of the guide post (15) moves through the interior of the connecting plate (22) and extends to the other side thereon. The first spring (16) is sleeved on the outside of the guide post (15), one end of the first spring (16) abuts against one side of the mounting bracket (14), and the other end of the first spring (16) abuts against one side of the connecting plate (22).

3. The reversible clamp structure for a cold heading machine as described in claim 1, characterized in that, The center of the drive worm gear (17) is fixedly connected to the outside of the flip shaft (11), and the other end of the drive worm gear (17) is rotatably connected to the inside of one end of the frame (23) and fixedly connected to the output end of the drive motor (24). The mounting end of the drive motor (24) is fixedly connected to one end of the frame (23).

4. The reversible clamp structure for a cold heading machine as described in claim 3, characterized in that, The other end of the guide rod (2) moves through the interior of one end of the L-shaped support plate (25), one end of the second spring (21) abuts against one end of the limiting ratchet plate (19), the other end of the second spring (21) abuts against the bottom surface of the L-shaped support plate (25), and the other end of the L-shaped support plate (25) is fixedly connected to the top of the frame (23).

5. The reversible clamp structure for a cold heading machine as described in claim 4, characterized in that, The other end of the flipping shaft (11) is rotatably connected to the inside of the frame (23). The two ends of the clamp track frame (1) are symmetrically provided with convex-shaped grooves (26), and the inside of the convex-shaped grooves (26) is slidably connected with a support arm (27).

6. The reversible clamp structure for a cold heading machine as described in claim 5, characterized in that, The other end of the support arm (27) is fixedly connected to both sides of the clamp body (28). One end of the clamp body (28) is slidably connected to the inside of the clamp track frame (1) and is threadedly connected to the external thread of the bidirectional threaded screw (29) inside it.

7. The reversible clamp structure for a cold heading machine as described in claim 6, characterized in that, The two ends of the bidirectional threaded screw (29) are rotatably connected to the inner wall of the clamp track frame (1), one end of which is fixedly connected to the output end of the servo motor (3), and the mounting end of the servo motor (3) is fixedly connected to one end outside the clamp track frame (1).

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