Fastening structure of punch die

Abstract

The utility model relates to a kind of fastening punch protruding die structure of quick change, including the upper die plate in the inside of punch die, the upper die plate is equipped with protruding die fixing part, punch protruding die is detachably equipped on the protruding die fixing part, the side surface of protruding die fixing part is detachably equipped with protruding die fastening pin for locking the punch protruding die;The utility model changes different punch protruding die, also only needs to loosen fastening screw, release the locking of protruding die fastening pin end portion's fastening camber to punch protruding die.This structure design makes the process of die dismounting punch protruding die only needs several minutes.

Description

Technical Field

[0001] This utility model relates to the field of punching die technology, specifically to a fastening and quick-change punching punch structure. Background Technology

[0002] During the punching process, frequent changes to punching dies are often necessary depending on the specific product requirements. Traditional die installation and disassembly methods are cumbersome, typically requiring multiple tools and bolts to secure the die to the stamping equipment. Changing dies involves significant time spent loosening and tightening bolts, and requires high installation precision. Positional deviations during installation may necessitate repeated adjustments, leading to prolonged equipment downtime and severely impacting production efficiency. Furthermore, the complex installation structure increases the workload for operators and raises production costs.

[0003] However, current punching dies have certain limitations when replacing punching punches: 1. When replacing the punch, the fastening screws of multiple punch fixing plates must first be removed, the punch fixing plates and the punch itself must be removed together, then a new punch must be installed, and then the punch fixing plates and the punch must be fixed to the upper template with multiple screws. The entire process of disassembling and assembling the die takes several tens of minutes; 2. High labor intensity. Traditional punch structures require the punch and punch fixing plates to be removed together during disassembly, which requires workers to lift them continuously, consuming a lot of physical strength; 3. High material cost. Because the punch head has a cylindrical boss, larger raw materials are often required for processing, thus greatly reducing material utilization. Summary of the Invention

[0004] This invention addresses the problem of changing punches in punching dies by proposing a quick-change punching die structure. When changing different punches, this solution only requires loosening the fastening screws and releasing the locking mechanism of the punch's end on the fastening pin. This design allows for the assembly and disassembly of the punching die in just a few minutes.

[0005] The purpose of this invention is achieved through the following technical solution: a fastening and quick-change punching punch structure, including an upper template inside the punching die, a punch fixing member on the upper template, a punching punch detachably mounted on the punch fixing member, and a punch fastening pin for locking the punching punch detachably mounted on the side of the punch fixing member.

[0006] Preferably, the upper template has a rectangular cross-section, and the center of the upper template is provided with a template countersunk hole for centering and positioning the punch fixing component.

[0007] Preferably, the punch fixing member is a cylindrical body with steps, and the top of the punch fixing member is provided with a first cylindrical boss. The outer circle of the punch fixing member and the first cylindrical boss is adapted to the template countersunk hole of the upper template.

[0008] Preferably, the punch fixing member is a cylindrical body with steps, and the top of the punch fixing member is provided with a first cylindrical boss. The outer circle of the punch fixing member and the first cylindrical boss is adapted to the template countersunk hole of the upper template.

[0009] Preferably, the punch is cylindrical in shape, and a second cylindrical boss is provided on the top of the punch, which cooperates with the punch positioning hole of the punch fixing member.

[0010] Preferably, the side wall of the punch fixing member is also provided with a fixing countersunk hole and a fixing through hole perpendicular to the punch positioning hole. The inside of the fixing countersunk hole is provided with a punch fastening pin for locking the punching punch. The inside of the fixing through hole is provided with a fastening screw that can be detachably connected to the punch fastening pin. After the fastening screw locks the inside of the punch fastening pin, it can lock the punch fastening pin on the punch fixing member. The end of the punch fastening pin is provided with a fastening arc surface that can press the second columnar boss.

[0011] Preferably, the bottom of the punch fixing member is also provided with a first threaded hole, and a guide screw is detachably provided inside the first threaded hole. The punch fastening pin is provided with a through guide groove adapted to the end of the guide screw, and the guide screw can restrict the rotation of the punch fastening pin.

[0012] Preferably, the punch fastening pin is cylindrical in shape and has a second threaded hole at its end. The fastening screw is detachably installed inside the second threaded hole. This design is to achieve a detachable connection between the punch fastening pin and the fastening screw.

[0013] Preferably, the top of the punch fixing member is provided with a groove to facilitate the removal of the fastening screw, and the punch fixing member is also provided with a vertical through hole coaxially above the punch positioning hole. The design of the groove makes it convenient to use tools when removing and installing the fastening screw.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When changing different punches, simply loosen the fastening screws and release the locking arc surface at the end of the punch fastening pin from the punch. This structural design allows the process of disassembling and assembling the punch to take only a few minutes, making it particularly suitable for small-batch production scenarios that require frequent die changes, thereby increasing production efficiency. 2. The disassembly and assembly process only involves adjusting the fastening screws and the punch fastening pins. Compared with the traditional solution, this reduces the number of screws that need to be removed. The fastening structure design of these two parts can be completed with one hand, which not only saves material costs but also significantly reduces the weight during operation. 3. When the punch fastening pin is installed inside the countersunk hole of the fixing part, the guide screw can restrict the rotation of the punch fastening pin. The design of the guide groove and the guide screw solves the problem of punch fastening pin installation deflection. Attached Figure Description

[0015] Figure 1 This is a partial cross-sectional view of a punching die in the prior art; Figure 2 This is a front cross-sectional view of the present invention; Figure 3 This utility model relates to Figure 2 Exploded view; Figure 4 This is a top view of the present invention; Figure 5 This is a schematic diagram of the punch fixing component of this utility model; Figure 6 This is a schematic diagram of the punching punch of this utility model; Figure 7 This is a schematic diagram of the punch fastening pin of this utility model.

[0016] Markings in the diagram: 1. Upper template; 11. Template countersunk hole; 2. Punch fixing component; 21. First cylindrical boss; 22. Punch positioning hole; 23. Fixing component countersunk hole; 24. Fixing component through hole; 25. Groove; 26. Vertical through hole; 3. Punching punch; 31. Second cylindrical boss; 4. Punch fastening pin; 41. Guide rail groove; 42. Second threaded hole; 43. Fastening arc surface; 5. Fastening screw; 6. Guide rail screw. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figure 1 As shown, in a traditional punching die structure, the punching die 3 is supported by a punch holder 2, which is fixed to the upper template 1 with three screws. When the punching die 3 needs to be replaced, first remove the screws on the punch holder 2, then remove the punch holder 2 and the punching die 3 together. Then, replace it with a new punching die 3, and finally fix the punch holder 2 and the new punching die 3 to the upper template 1 with multiple screws, thus completing the punch replacement.

[0018] The existing punching die structure has significant drawbacks: First, the die changing efficiency is low. When it is necessary to replace the punching die 3, multiple screws must be removed, and the punch fixing part 2 and the punching die 3 must be removed together. Then, a new punching die 3 is installed, and the punch fixing part 2 and the punching die 3 are fixed to the upper platen with multiple screws. The entire process of disassembling and assembling the die is time-consuming. Second, the labor intensity is high. When disassembling this punch structure, the punching die 3 and the punch fixing part must be removed together, and the worker must lift them continuously, which is very physically demanding.

[0019] like Figure 2 , Figure 3 and Figure 4 As shown, a fastening and quick-change punching die structure includes an upper template 1 inside the punching die, and a punch fixing member 2 is provided on the upper template 1. The upper template 1 has a rectangular cross-section, and a template countersunk hole 11 for centering and positioning the punch fixing member 2 is provided at the center of the upper template 1. The punch fixing member 2 is a stepped cylinder, and a first cylindrical boss 21 is provided at the top of the punch fixing member 2. The outer circles of the punch fixing member 2 and the first cylindrical boss 21 are adapted to the template countersunk hole 11 of the upper template 1.

[0020] This configuration allows the punch holder 2 to be installed inside the upper template 1, eliminating the need to remove the punch holder 2 from the upper template 1 during subsequent replacement of the punching punch 3. Therefore, under normal circumstances, the punching punch 3 is fixedly connected to the inside of the countersunk hole 11 on the upper template 1.

[0021] Please continue to refer to this. Figure 5 and Figure 6 In this embodiment, the punch fixing member 2 is detachably provided with a punching punch 3. The punch fixing member 2 has a punch positioning hole 22 at its center for centering and positioning the punching punch 3. The punching punch 3 is detachably installed inside the punch positioning hole 22. The punching punch 3 is cylindrical in shape, and the top of the punching punch 3 is provided with a second cylindrical boss 31, which cooperates with the punch positioning hole 22 of the punch fixing member 2.

[0022] The countersunk hole 11, the punch positioning hole 22, and the second cylindrical boss 31 enable three-level positioning between the upper template 1, the punch fixing member 2, and the punching punch 3, ensuring the accuracy of subsequent repeated positioning. The punch fixing member 2 is also provided with a vertical through hole 26 coaxially above the punch positioning hole 22. The vertical through hole 26 is provided to facilitate the machining of the punch fixing member 2.

[0023] In this embodiment, please continue to refer to Figure 7The side of the punch fixing member 2 is detachably provided with a punch fastening pin 4 for locking the punching punch 3. The side wall of the punch fixing member 2 is also provided with a fixing countersunk hole 23 and a fixing through hole 24 perpendicular to the punch positioning hole 22. The fixing countersunk hole 23 is provided with a punch fastening pin 4 for locking the punching punch 3, and the fixing through hole 24 is provided with a fastening screw 5 that can be detachably connected to the punch fastening pin 4.

[0024] The punch fastening pin 4 is cylindrical in shape and has a second threaded hole 42 at its end. The fastening screw 5 is detachably installed inside the second threaded hole 42. After the fastening screw 5 locks the inside of the punch fastening pin 4, it can lock the punch fastening pin 4 onto the punch fixing member 2. The end of the punch fastening pin 4 has a fastening arc surface 43 that can press against the second cylindrical boss 31.

[0025] When it is necessary to lock the punching punch 3, first install the punching punch 3 inside the punch positioning hole 22. Next, insert the punch fastening pin 4 inside the countersunk hole 23 of the fixing part, and at the same time insert the fastening screw 5 inside the through hole 24 of the fixing part, so that the fastening screw 5 is firmly locked inside the second threaded hole 42. At this time, under the action of the punch fastening pin 4, the fastening arc surface 43 firmly locks the punching punch 3.

[0026] When changing to different punches 3, simply loosen the fastening screws 5 and release the locking of the punch 3 by the fastening arc surface 43 at the end of the punch fastening pin 4. This structural design allows the process of disassembling and assembling the punch 3 to take only a few minutes, compared to at least tens of minutes in traditional solutions, resulting in an exponential increase in production efficiency. It is particularly suitable for small-batch production scenarios that require frequent die changes.

[0027] Furthermore, the disassembly and assembly process only involves adjusting the fastening screws 5 and the punch fastening pins 4, which reduces the number of screws to be removed compared to the traditional solution. The fastening structure design of these two parts can be completed with one hand, which not only saves material costs but also significantly reduces the weight during operation.

[0028] The structure of the punching punch 3 in this embodiment, compared to the traditional punching punch 3 structure, eliminates the multi-level boss structure, thereby improving material utilization. Furthermore, it allows for direct machining using small-diameter bar stock, reducing machining allowances and minimizing the consumption of special steel. The modular design of this embodiment reduces the cost of replacing vulnerable parts, thus lowering maintenance costs. In this embodiment, the bottom of the punch fixing member 2 is also provided with a first threaded hole, and a guide screw 6 is detachably provided inside the first threaded hole. The punch fastening pin 4 is provided with a through guide groove 41 adapted to the end of the guide screw 6. The guide screw 6 can restrict the rotation of the punch fastening pin 4. The top of the punch fixing member 2 is provided with a groove 25 for easy removal of the fastening screw 5.

[0029] Whenever the punch fastening pin 4 is installed inside the countersunk hole 23 of the fixing part, the guide screw 6 can restrict the rotation of the punch fastening pin 4. The guide groove 41, in conjunction with the design of the guide screw 6, solves the problem of punch fastening pin 4 installation deflection. The groove 25 makes it easy to operate tools without obstruction during the subsequent removal of the fastening screw 5.

[0030] Working principle and usage of this utility model: During the disassembly and assembly of the punching punch 3, simply loosen the fastening screw 5 to release the locking of the punching punch 3 by the fastening arc surface 43 at the end of the punch fastening pin 4. Then, insert punching punches 3 of different specifications into the punch positioning hole 22, and retighten the punch fastening pin 4 and fastening screw 5 to relock the punching punch 3 by the fastening arc surface 43 at the end of the punch fastening pin 4.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A fastening and quick-change punching die structure, comprising an upper template (1) inside the punching die, characterized in that, The upper template (1) is provided with a punch fixing member (2), and the punch fixing member (2) is provided with a punching punch (3) that can be detached. The side of the punch fixing member (2) is provided with a punch fastening pin (4) for locking the punching punch (3).

2. The quick-change punching die structure according to claim 1, characterized in that, The upper template (1) has a rectangular cross-section, and the upper template (1) has a template countersunk hole (11) at its center for centering and positioning of the punch fixing member (2).

3. The quick-change punching die structure according to claim 2, characterized in that, The punch fixing member (2) is a cylindrical body with steps. The top of the punch fixing member (2) is provided with a first columnar boss (21). The outer circle of the punch fixing member (2) and the first columnar boss (21) is adapted to the template countersunk hole (11) of the upper template (1).

4. The quick-change punching die structure according to claim 3, characterized in that, The center of the punch fixing member (2) is provided with a punch positioning hole (22) for centering and positioning the punching punch (3), and the punching punch (3) can be detachably installed inside the punch positioning hole (22).

5. The quick-change punching die structure according to claim 4, characterized in that, The punch (3) is cylindrical in shape, and a second columnar boss (31) is provided on the top of the punch (3). The second columnar boss (31) cooperates with the punch positioning hole (22) of the punch fixing member (2).

6. The quick-change punching die structure according to claim 4, characterized in that, The side wall of the punch fixing member (2) is also provided with a fixing countersunk hole (23) and a fixing through hole (24) perpendicular to the punch positioning hole (22). The inside of the fixing countersunk hole (23) is provided with a punch fastening pin (4) for locking the punching punch (3). The inside of the fixing through hole (24) is provided with a fastening screw (5) that can be disassembled and connected to the punch fastening pin (4). After the fastening screw (5) locks the inside of the punch fastening pin (4), it can lock the punch fastening pin (4) on the punch fixing member (2). The end of the punch fastening pin (4) is provided with a fastening arc surface (43) that can press the second columnar boss (31).

7. The quick-change punching die structure according to claim 6, characterized in that, The bottom of the punch fixing member (2) is also provided with a first threaded hole, and a guide screw (6) is detachably provided inside the first threaded hole. The punch fastening pin (4) is provided with a through guide groove (41) adapted to the end of the guide screw (6). The guide screw (6) can restrict the rotation of the punch fastening pin (4).

8. The quick-change punching die structure according to claim 7, characterized in that, The punch fastening pin (4) is cylindrical in shape and the end of the punch fastening pin (4) is provided with a second threaded hole (42). The fastening screw (5) can be detachably installed inside the second threaded hole (42).

9. The quick-change punching die structure according to claim 6, characterized in that, The top of the punch fixing member (2) is provided with a groove (25) to facilitate the removal of the fastening screw (5), and the punch fixing member (2) is also provided with a vertical through hole (26) coaxially above the punch positioning hole (22).

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