Blank piercing process auxiliary jig

Abstract

The utility model relates to the technical field of clamping tool, concretely is blank punching process auxiliary fixture, including clamping forceps, fixed on the elastic auxiliary mechanism of clamping forceps and fixed on the locking mechanism of clamping forceps, the upper end of elastic auxiliary mechanism is detachably connected on punching equipment, clamping forceps includes two intercrossed clamping arms, two clamping arms are hinged through the pin shaft, the clamping arm includes short arm and long arm, and the pin shaft is arranged at the intersection of short arm and long arm of each clamping arm, the elastic auxiliary mechanism includes the elastic rope of hanging on punching equipment, the metal hook of fixed in the lower end of elastic rope, the end of pin shaft is fixedly connected with the ring, and the ring can be hung on the metal hook, the locking mechanism is fixed on the one end of long arm away from pin shaft, and the locking mechanism is used for locking the clamping state of clamping forceps. The present application can reduce the operation difficulty when using tool to clamp blank in punching process, improve the clamping labor-saving effect, improve the clamping stability.

Description

Technical Field

[0001] This utility model relates to the technical field of clamping tools, specifically to auxiliary clamps for blank punching processes. Background Technology

[0002] In the field of mechanical manufacturing, punching blanks is a common processing procedure. Before punching, the blanks undergo heat treatment to soften them and reduce punching resistance. However, the blanks are still quite hot after heat treatment, so auxiliary fixtures are needed to hold them in place so that they can be positioned on the lower die of the stamping die for subsequent punching operations.

[0003] Existing auxiliary clamps typically employ a long-handled clamp structure, such as the prior art "A clamp for gripping forged billets" (Publication No.: CN105290294A), which includes two grippers connected by pins and a chuck at the top of the grippers. Utilizing the lever principle, the length of the grip bar is increased, making it easier to grip the billet. However, the prior art still has the following technical problems: Since metal billets have a certain weight, as the weight and size of the billets increase, a greater clamping force is required when holding them. However, in the existing technology, clamps require the use of both hands to maintain the clamping force at all times to prevent the billets from falling off, which is still quite laborious. Moreover, for cylindrical billets, the contact area between the clamp and the billet is smaller, making it more difficult to clamp them firmly. This results in unstable clamping of existing clamps, which can easily cause the billets to fall off when moving them, thereby damaging the surface of the billets and reducing the surface quality of the billets. Utility Model Content

[0004] This utility model provides an auxiliary fixture for the blank punching process, which can solve the problems in the prior art where the fixture is laborious to operate when holding cylindrical blanks, and is prone to unstable clamping, causing the blank to fall and be damaged, thus reducing the surface quality of the blank.

[0005] This application provides the following technical solution: an auxiliary fixture for blank punching process, including a clamping clamp, a spring-loaded auxiliary mechanism fixed on the clamping clamp, and a locking mechanism fixed on the clamping clamp, wherein the upper end of the spring-loaded auxiliary mechanism is detachably connected to the punching equipment. The clamping clamp includes two clamping arms that are cross-connected to each other. The two clamping arms are pivotally connected by a pin. The clamping arms include a short arm and a long arm. The pin is located at the intersection of the short arm and the long arm of each clamping arm. The elastic auxiliary mechanism includes an elastic rope hanging on the punching equipment and a metal hook fixed to the lower end of the elastic rope. A hanging ring is fixedly connected to the end of the pin, and the hanging ring can be hung on the metal hook. The locking mechanism is fixed to one end of the long arm away from the pin, and the locking mechanism is used to lock the clamping state of the clamping pliers.

[0006] Beneficial effects: 1. Reduced operational intensity and improved clamping efficiency. With the help of an elastic auxiliary mechanism, the elastic rope applies an upward pull to the pin of the clamping pliers through the hanging ring. This directly counteracts part of the weight of the cylindrical billet during clamping. Operators no longer need to rely entirely on their hands to grip the clamping arms to counteract the weight of the billet. Compared to existing technologies, operators can maintain the initial clamping posture of the billet with less force. This is especially beneficial for heavy and large-sized billets, significantly reducing hand strain and preventing hand fatigue from prolonged operation. It solves the problem of laborious clamping operations in existing technologies, improving operational convenience and efficiency. 2. Enhanced clamping stability, ensuring billet safety and surface quality. The locking mechanism locks the clamping state of the clamping pliers after clamping the billet. Compared to existing technologies, operators only need to maintain a certain clamping force when initially clamping the billet and use the locking mechanism to lock the clamping pliers, without needing to maintain a continuous clamping force with both hands throughout the process. This avoids clamping loosening caused by force fluctuations during manual operation, preventing billet from falling and being damaged at the source. It also prevents billet from falling during movement, effectively improving billet clamping stability and ensuring billet surface quality.

[0007] Furthermore, the locking mechanism includes an arc-shaped plate fixed on one of the long arms, a threaded post fixed on the other long arm, and a wrench threaded onto the threaded post; the arc-shaped plate is provided with an arc-shaped opening, the threaded post can slide within the arc-shaped opening as the long arm swings, and the wrench is used to lock the swing state of the long arm.

[0008] Beneficial effects: The arc-shaped opening on the arc plate can accommodate the trajectory of the threaded column as the long arm swings. Regardless of the clamping angle adjusted to the cylindrical billet diameter, the threaded column can slide smoothly within the arc-shaped opening, avoiding locking jamming due to angle deviation. After the clamping pliers clamp the billet, turning the wrench will press the arc plate firmly onto the long arm, thus quickly locking the swing state of the long arm. There is no need for continuous manual gripping and force application, thus solving the problem of maintaining clamping force with both hands in existing technologies. The threaded locking method provides a stable and adjustable clamping force, preventing the cylindrical billet from shifting or falling and being damaged due to loose clamping force, improving operational convenience while ensuring clamping stability. In addition, the arc-shaped opening design allows the clamping pliers to change the size of the clamping opening according to the size of the billet, increasing the application range of the clamping pliers and improving the adaptability of the fixture.

[0009] Furthermore, the wrench includes a cylindrical section and a handle, the cylindrical section being threaded onto a threaded post, and the outer circumference of the cylindrical section being larger than the width of the arc-shaped opening.

[0010] Beneficial effects: The outer circumference of the cylindrical section is larger than the width of the matching arc-shaped opening, so that when the wrench is turned to tighten the arc-shaped plate, the cylindrical section has sufficient surface area to form frictional contact with the pressure plate, improving the reliability of tightening the arc-shaped plate and allowing the locking force to be transmitted to the arc-shaped plate over a wider range. This enhances the anti-loosening ability after locking and prevents the cylindrical blank from shifting or falling off during the punching process due to loosening of the lock. Furthermore, the increased operating torque means that the operator does not need to apply excessive force to turn the wrench to complete the locking, reducing the intensity of operation and making the locking operation smoother and more efficient, thus improving the overall processing efficiency and safety.

[0011] Furthermore, the short arm is provided with an arc-shaped notch, and the arc-shaped notches of the two short arms are arranged opposite each other.

[0012] Beneficial effects: The arc-shaped notch can fit the outer circumference of the cylindrical billet, which significantly increases the contact area with the billet compared to the traditional planar short arms in the prior art. This allows the clamping force to be distributed more evenly on the billet surface, avoiding excessive local force that could cause indentations on the billet surface. It also reduces the risk of the billet rotating and loosening during clamping. The arc-shaped notches of the two short arms are set opposite each other, which can form a ring-shaped positioning of the billet. This can quickly constrain the cylindrical billet in the central area formed by the notch, keeping the billet in the clamping position at all times and greatly improving the clamping and positioning stability of the cylindrical billet.

[0013] Furthermore, a protective sleeve is provided at the end of the long arm.

[0014] Beneficial effects: The protective sleeve at the end of the long arm can protect the billet and the fixture while ensuring operational safety. The protective sleeve can cover the metal edges at the end of the long arm, preventing the operator's hands from being cut by sharp edges when holding the long arm to adjust the clamping angle and lock the locking mechanism. Especially in the process of frequently changing billets and adjusting fixtures, it can effectively reduce safety hazards and improve the practicality and safety of the fixture. Attached Figure Description

[0015] Figure 1 This is the main structural view of Embodiment 1.

[0016] Figure 2 for Figure 1 Top view of the clamping clamp.

[0017] Figure 3 for Figure 2 An enlarged view of the locking mechanism.

[0018] Figure 4 for Figure 3 The main view after removing the wrench. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: punching machine 1, blank 2, positioning block 3, elastic rope 4, metal hook 5, hanging ring 6, clamping pliers 7, short arm 8, arc notch 801, pin 9, screw 10, protective sleeve 11, arc plate 12, arc opening 13, handle 14, threaded post 15, cylindrical section 16, long arm 17.

[0020] Example 1 like Figures 1 to 2 As shown, the auxiliary fixture for the blank punching process in this embodiment includes a clamping clamp 7, a spring-loaded auxiliary mechanism fixed on the clamping clamp 7, and a locking mechanism fixed on the clamping clamp 7. Figure 1 In the middle, a positioning block 3 is welded and fixed on the upper left side of the punching machine 1, and a hook is fixed below the positioning block 3. The elastic auxiliary mechanism includes an elastic rope 4 hanging on the hook and a metal hook 5 fixed at the lower end of the elastic rope 4.

[0021] like Figure 2 As shown, the clamping clamp 7 includes two intersecting clamping arms, which are pivotally connected by a pin 9. Each clamping arm includes an integrally formed short arm 8 and a long arm 17. The pin 9 is located at the intersection of the short arm 8 and the long arm 17 of each clamping arm. Figure 1 and Figure 2 As shown, a hanging ring 6 is fixedly connected to the end of the pin 9, and the hanging ring 6 can be hung on the metal hook 5. The short arm 8 is provided with an arc-shaped notch 801, and the arc-shaped notches 801 of the two short arms 8 are arranged opposite each other to increase the contact area with the blank 2 and improve the clamping stability. A protective sleeve 11 is provided on the end of the long arm 17 to facilitate the operator's hand grip.

[0022] like Figure 2 , Figure 3 and Figure 4 As shown, the locking mechanism is fixed on one end of the long arm 17 away from the pin 9. The locking mechanism includes an arc-shaped plate 12 fixed to one of the long arms 17 by screws 10, a threaded post 15 welded to the other long arm 17, and a wrench threaded to the threaded post 15. The arc-shaped plate 12 has an arc-shaped opening 13, the threaded post 15 is located in the arc-shaped opening 13, and the threaded post 15 can slide in the arc-shaped opening 13 as the long arm 17 swings. The wrench includes a cylindrical section 16 and a handle 14. The cylindrical section 16 has internal threads so that the cylindrical section 16 can be threaded to the threaded post 15, and the outer circumference of the cylindrical section 16 is larger than the width of the arc-shaped opening 13. The handle 14 is integrally formed with the cylindrical section 16, and there are multiple handles 14, which are evenly distributed on the outer circumference of the cylindrical section 16.

[0023] The method of using this fixture is as follows: Fixture preparation and initial state adjustment: First, confirm that the hook of the upper left positioning block 3 of the punching machine 1 is secure. Hang the upper end of the elastic rope 4 in the elastic auxiliary mechanism on the hook, ensuring that the elastic rope 4 hangs down naturally and is not tangled. At this time, the clamping pliers 7 are in an unclamped state. Rotate the handle 14 of the locking mechanism to allow the threaded column 15 to slide freely in the arc opening 13 of the arc plate 12. At the same time, check whether the protective sleeve 11 at the end of the long arm 17 is intact to ensure safe grip.

[0024] The operator holds the protective sleeves 11 of the two long arms 17 with both hands, usually holding the protective sleeve 11 closest to the handle 14 with the right hand. The operator then controls the opening of the long arms 17 to open the short arms 8. The cylindrical billet 2 is typically conveyed to the worktable via a conveyor belt. The operator controls the arc-shaped notches 801 on the two short arms 8 to clamp the outer wall of the cylindrical billet 2. Then, the operator uses both hands to forcefully clamp the short arms 8. Since the right thumb is freed up when applying force, the operator can use their right thumb to move the handle 14 while maintaining the clamping force, allowing the cylindrical billet 2 to open. The bottom surface of the cylindrical section 16 presses against the arc-shaped plate 12, forming a locking force on the arc-shaped plate 12. Since multiple handles 14 are evenly distributed on the outer periphery of the cylindrical section 16, the right thumb can continuously move the handles 14 to strengthen the pressing force on the arc-shaped plate 12. Then, the blank 2 can be clamped and transported to the stamping position of the stamping machine. During this process, since the elastic rope 4 is in a stretched state, when the blank 2 is clamped and moved, part of the weight of the blank 2 can be offset by the action of the elastic rope 4, making it easier for the operator to move the blank 2.

[0025] Punching and Fixture Reset: After moving the blank 2 to the corresponding punching position on the punching machine, rotate the handle 14 in the opposite direction to loosen the clamping state of the cylindrical section 16 against the arc plate 12. The short arm 8 can then be opened again. Then, the clamp 7 is moved away from the punching area, and the punching machine 1 can be started to complete the punching operation of the blank 2. If the tools need to be stored, the hanging ring 6 of the elastic auxiliary mechanism can be removed from the metal hook 5, and then the upper end of the elastic rope 4 can be removed from the hook of the positioning block 3. The fixtures can then be stored separately for the next use.

[0026] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An auxiliary fixture for the blank punching process, characterized in that: It includes a clamping clamp, a spring-loaded auxiliary mechanism fixed to the clamping clamp, and a locking mechanism fixed to the clamping clamp, wherein the upper end of the spring-loaded auxiliary mechanism is detachably connected to the punching equipment; The clamping clamp includes two clamping arms that are cross-connected to each other. The two clamping arms are pivotally connected by a pin. The clamping arms include a short arm and a long arm. The pin is located at the intersection of the short arm and the long arm of each clamping arm. The elastic auxiliary mechanism includes an elastic rope hanging on the punching equipment and a metal hook fixed to the lower end of the elastic rope. A hanging ring is fixedly connected to the end of the pin, and the hanging ring can be hung on the metal hook. The locking mechanism is fixed to one end of the long arm away from the pin, and the locking mechanism is used to lock the clamping state of the clamping pliers.

2. The auxiliary fixture for the blank punching process according to claim 1, characterized in that: The locking mechanism includes an arc-shaped plate fixed on one of the long arms, a threaded post fixed on the other long arm, and a wrench threaded onto the threaded post; the arc-shaped plate has an arc-shaped opening, the threaded post can slide within the arc-shaped opening as the long arm swings, and the wrench is used to lock the swing state of the long arm.

3. The auxiliary fixture for the blank punching process according to claim 2, characterized in that: The wrench includes a cylindrical section and a handle, wherein the cylindrical section is threaded onto a threaded post, and the outer circumference of the cylindrical section is greater than the width of the arc-shaped opening.

4. The auxiliary fixture for the blank punching process according to claim 3, characterized in that: The short arm has an arc-shaped notch, and the arc-shaped notches of the two short arms are arranged opposite each other.

5. The auxiliary fixture for the blank punching process according to claim 4, characterized in that: The end of the long arm is equipped with a protective sleeve.

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