Punching device

Abstract

The utility model belongs to the technical field of punching, and provides a punching device which comprises a base table and a punching device body. The fixing mechanism is arranged on the base table, and the fixing mechanism is used for placing a workpiece to be machined and limiting displacement of the workpiece relative to the base table; the punching mechanism is movably arranged on the base table, the punching mechanism comprises a pre-pressing block and a punch, an elastic piece is connected between the pre-pressing block and the punching mechanism, and the elastic piece is used for pushing the pre-pressing block to abut against a workpiece to be machined; and the punch is movably inserted into the pre-pressing block and is used for punching the workpiece. Compared with the prior art, the pre-pressing mechanism has the advantages that the overall structure is simple, the elastic piece is used for driving the pre-pressing block to abut against a workpiece, the punch can stably punch the workpiece before machining and can be smoothly separated from the workpiece after machining is completed, the workpiece is effectively prevented from being taken away from the fixing mechanism by the punch, and the work efficiency is improved. And the smoothness and stability in the machining process are improved, and it is ensured that the quality of the workpiece is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of punching, and in particular relates to a punching device. Background Art

[0002] With the rapid development of industry, mechanical equipment is being used more and more, and many mechanical equipment require workpieces with holes to achieve functions such as connection and control.

[0003] At present, most of the punching devices on the market use oil cylinders or air cylinders to drive the punch to move along the direction of the workpiece, and finally realize punching on the workpiece. In the process of the punch withdrawing from the workpiece after punching, the punch often sticks to the workpiece due to cutting burrs and the high temperature of the punch during repeated cutting, causing the punch to carry the workpiece away from the fixing mechanism when withdrawing, affecting the smoothness and stability of the workpiece processing process, resulting in the quality of the final processed workpiece failing to meet the customer's usage requirements. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is: to propose a punching device with a simple overall structure, which utilizes an elastic part to drive a pre-pressure block to press against a workpiece, so that the punch can stably punch the workpiece before processing and can smoothly detach from the workpiece after processing is completed, effectively preventing the punch from carrying the workpiece away from the fixing mechanism, thereby improving the smoothness and stability of the processing process and ensuring that the quality of the workpiece is not affected.

[0005] The utility model solves the technical problem by adopting a technical solution of providing a punching device, comprising: a base;

[0006] A fixing mechanism, arranged on the base, for placing a workpiece to be processed and limiting displacement of the workpiece relative to the base;

[0007] A punching mechanism is movably arranged on the base, the punching mechanism comprises a pre-pressing block and a punch, an elastic member is connected between the pre-pressing block and the punching mechanism, the elastic member is used to push the pre-pressing block against the workpiece to be processed; the punch is movably inserted in the pre-pressing block and punches the workpiece;

[0008] When the elastic member contracts and presses the pre-pressing block against the workpiece to be processed, the punch can penetrate the pre-pressing block to punch the workpiece;

[0009] When the punching mechanism drives the punch away from the processed workpiece, the pre-pressing block abuts against the processed workpiece, thereby preventing the punch from bringing the workpiece away from the fixing mechanism.

[0010] In the above-mentioned punching device, the punching mechanism includes:

[0011] A moving block is slidably arranged on the base, the punch is connected to the moving block, a guide hole is provided on the moving block, one end of the elastic member is connected to the guide hole, and the other end is connected to the pre-pressing block;

[0012] A connecting piece, wherein the moving block is provided with a stepped hole connected to the guide hole, one end of the connecting piece is connected to the pre-pressing block, and the other end is movably pressed against the inner wall of the stepped hole, and the elastic piece is sleeved on the connecting piece;

[0013] A guide column is arranged in the fixing mechanism, the pre-pressing block is provided with a through hole, the moving block is provided with a connecting hole arranged coaxially with the through hole, and one end of the guide column away from the fixing mechanism passes through the through hole and is movably inserted in the connecting hole;

[0014] The block-pushing cylinder is arranged on the base, and the driving end of the block-pushing cylinder is connected to the moving block, so as to push the moving block to approach or move away along the direction of the fixing mechanism.

[0015] In the above-mentioned punching device, the fixing mechanism includes:

[0016] A fixing seat is arranged on the base, and a step groove is formed on the end of the fixing seat close to the punching mechanism, and the workpiece to be processed is closely attached to the step groove;

[0017] A profiling block, wherein a fixing groove is provided in the fixing seat, the profiling block is movably connected in the fixing groove, and a clearance hole is provided on the profiling block, and the clearance hole is for the punch to pass through;

[0018] A pressing member is arranged on the base and located above the fixing seat. A pressing block is movably arranged on the pressing member, and the pressing block is used to press the workpiece onto the step groove.

[0019] In the above-mentioned punching device, the pressing member includes:

[0020] A mounting bracket, arranged on the base;

[0021] A driving member is arranged on the mounting bracket along a vertical direction, and a driving end of the driving member is connected to the pressing block to push the pressing block to move along the direction of the step groove.

[0022] In the above-mentioned punching device, the punching mechanism also includes limit blocks symmetrically distributed on the base, a snap-fit ​​groove is formed on the limit block, and snap-fit ​​blocks are provided on both sides of the moving block, and the snap-fit ​​blocks are movably snap-fitted in the snap-fit ​​groove.

[0023] In the above-mentioned punching device, the pre-pressing block is provided with a limiting groove and a contour hole interconnected with each other, and the contour hole allows the punch to pass through to punch the workpiece; the limiting groove is used to limit the depth of the punch punching the workpiece.

[0024] In the above-mentioned punching device, a pressing plate and a mounting groove are provided on the moving block, a locking groove is formed on the pressing plate, and a protruding block is formed on the punch;

[0025] When the punch is placed in the mounting groove, the pressing plate is pressed against the punch, so that the locking groove is sleeved on the protruding block to limit the displacement of the punch relative to the moving block.

[0026] In the above-mentioned punching device, a sensor is also provided on the limit block, and the sensor is used to detect the position of the workpiece to be processed.

[0027] In the above-mentioned punching device, the base is further provided with arc blocks located on both sides of the fixing seat, and the arc blocks extend to the front end of the fixing seat close to the punch, and are used to cooperate with the step groove to support the workpiece to be processed.

[0028] In the above-mentioned punching device, a detachable auxiliary block capable of adding lubricant is provided on the base, and the moving block is slidably arranged on the auxiliary block.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] (1) When a workpiece is placed in a fixing mechanism, the punching mechanism drives the punch and the pre-pressing block to approach the workpiece. When the pre-pressing block contacts the workpiece and the elastic member begins to shrink, the pre-pressing block can be pressed against the surface of the workpiece to be punched, so as to ensure the smoothness and stability of the subsequent punch during the punching process. After the workpiece is punched, since the elastic member needs to be converted from a contracted state to an expanded state, the pre-pressing block is still pressed against the workpiece during the process of the punching mechanism driving the punch to separate from the workpiece, thereby effectively preventing the workpiece from being carried away from the fixing mechanism during the separation process of the punch, ensuring that the punch is stably separated from the workpiece and the workpiece always maintains stability during the processing, so that the quality of the processed workpiece can meet the customer's usage requirements.

[0031] (2) The guide column on the fixing mechanism passes through the through hole on the pre-pressing block and is movably inserted into the connecting hole of the moving block. In addition, the engaging block on the moving block is movably engaged in the engaging groove of the limit block, which effectively ensures the stability of the pre-pressing block and the punch when they move along the direction of the fixing mechanism, ensures that the pre-pressing block is stably pressed against the workpiece to be processed, and ensures the accuracy of the punch when punching the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a stereogram of the present application;

[0033] Figure 2 This is a view of the installation structure of the punching mechanism and the fixing seat on the base;

[0034] Figure 3 It is a structural schematic diagram of the moving block, the limiting block and the pressing plate;

[0035] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle;

[0036] Figure 5 yes Figure 3 Cross-sectional view at middle BB;

[0037] Figure 6 It is a schematic diagram of the structure of the fixing seat, auxiliary block and base.

[0038] In the figure, 1, abutment; 10, auxiliary block;

[0039] 2. Fixing mechanism; 20. Fixing seat; 200. Step groove; 201. Fixing groove; 21. Profiling block; 210. Clearance hole; 22. Pressing member; 220. Pressing block; 221. Mounting bracket; 222. Driving member; 23. Arc block;

[0040] 3. Punching mechanism; 30. Pre-pressing block; 300. Through hole; 301. Limiting groove; 302. Profile hole; 31. Punch; 310. Protruding block; 32. Elastic member; 33. Moving block; 330. Guide hole; 331. Step hole; 332. Connecting hole; 333. Engaging block; 334. Pressing plate; 334a. Locking groove; 335. Mounting groove; 34. Connecting member; 35. Guide column; 36. Pushing block cylinder; 37. Limiting block; 370. Engaging groove;

[0041] 40. Sensor. DETAILED DESCRIPTION

[0042] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0043] like Figures 1 to 6 As shown, the utility model is a punching device, comprising: a base 1, a fixing mechanism 2 and a punching mechanism 3, as shown in FIG. Figure 1As shown, the fixing mechanism 2 is located at the rightmost end of the base 1. Before punching the workpiece, the workpiece to be processed needs to be placed on the fixing mechanism 2, and the fixing mechanism 2 fixes the workpiece to limit the displacement of the workpiece relative to the base 1 when the device punches the hole; the punching mechanism 3 is movably arranged on the left side of the base 1, wherein the punching mechanism 3 includes a pre-pressing block 30 and a punch 31, and an elastic member 32 is connected between the pre-pressing block 30 and the punching mechanism 3, as shown in FIG. Figure 2 As shown in the figure, the pre-pressing block 30 is closer to the fixing mechanism 2 than the punch 31. Therefore, when the punching mechanism 3 drives the punch 31 and the pre-pressing block 30 to move along the fixing mechanism 2, the punch 31 and the pre-pressing block 30 move along the fixing mechanism 2. Figure 2 When moving to the right, the pre-pressing block 30 may first contact the side wall of the workpiece, and during the continued movement, the elastic member 32 begins to be compressed, thereby pushing the pre-pressing block 30 to press against the workpiece, further fixing the workpiece; at the same time, since the punch 31 is movably inserted in the pre-pressing block 30, during the process in which the elastic member 32 is compressed and pushes the pre-pressing block 30 to press against the workpiece, the punch 31 gradually passes through the pre-pressing block 30, and after the pre-pressing block 30 presses the workpiece tightly, the punch 31 is close to the workpiece to be processed, and completes the punching of the workpiece in the process of continuing to approach, and it is precisely because the pre-pressing block 30 pre-presses the position of the workpiece to be punched that the quality of the punch 31 punching the workpiece is guaranteed to a great extent; after the punching of the workpiece is completed, the punching mechanism 3 with The movable punch 31 is separated from the workpiece. It is worth noting that during the process of the punch 31 mechanism driving the punch 31 to separate from the workpiece, the elastic member 32 is still in a compressed state, that is, during the process of the elastic member 32 converting from the compressed state to the expanded state, the elastic member 32 can always give the pre-pressing block 30 a force to press against the workpiece. Therefore, when the punching mechanism 3 drives the punch 31 away from the processed workpiece, the pre-pressing block 30 is pressed against the processed workpiece, which effectively prevents the punch 31 from bringing the workpiece away from the fixing mechanism 2 during the separation process, ensures that the punch 31 and the workpiece maintain relative stability, improves the fluency and stability of the punching device during punching, and avoids the workpiece being taken away from the fixing mechanism 2 by the punch 31 and affecting the quality of subsequent punching of the workpiece.

[0044] The fixing mechanism 2 includes: a fixing seat 20, which is arranged on the base 1, and a step groove 200 is formed at the end of the fixing seat 20 close to the punching mechanism 3, and the workpiece to be processed is pressed against the step groove 200; a profiling block 21, a fixing groove 201 is arranged in the fixing seat 20, and the profiling block 21 is movably connected in the fixing groove 201, and a clearance hole 210 is arranged on the profiling block 21, and the clearance hole 210 is for the punch 31 to pass through; a clamping member 22, which is arranged on the base 1 and located above the fixing seat 20, and a clamping block 220 is movably arranged on the clamping member 22, and the clamping block 220 is used to press the workpiece against the step groove 200.

[0045] refer to Figure 1 and Figure 6The fixing mechanism 2 in this scheme is mainly composed of a fixing seat 20, a profiling block 21 and a pressing member 22. It should be noted that the workpiece to be punched in this scheme is arranged in an L-shaped strip, so several punching devices in this scheme can be used to punch holes at various positions of the workpiece at the same time, which greatly improves the punching efficiency of the workpiece; and before punching, the workpiece needs to be placed on the step groove 200 of the fixing seat 20. In order to ensure the stability of the workpiece, this scheme turns the L-shaped workpiece upside down, so that the workpiece can be close to Figure 5 The step groove 200 shown effectively prevents the workpiece from shaking on the fixed seat 20. After the clamping member 22 drives the clamping block 220 to move along the direction of the fixed seat 20, the workpiece to be punched can be pressed on the step groove 200, further limiting the displacement of the workpiece relative to the fixed seat 20 and improving the stability of the workpiece during the punching process.

[0046] Furthermore, in the present invention, a fixing groove 201 is provided in the fixing seat 20, and the profiling block 21 is movably connected in the fixing groove 201. In the process of the punch 31 punching the workpiece, it is often necessary to give the punch 31 a certain punching space. Therefore, in the present invention, a clearance hole 210 is provided on the profiling block 21. When the punch 31 passes through the workpiece to complete the punching, the punch 31 can be extended into the clearance hole 210, which effectively avoids the phenomenon that the punch 31 and the fixing seat 20 are caused by displacement interference and the tool is damaged. It is worth noting that the clearance hole 210 is consistent with the shape of the punch 31, which is conducive to a certain guiding and limiting effect when the punch 31 punches the workpiece, and the profiling block 21 in the present invention adopts a detachable installation method, which is convenient for it to be disassembled and replaced in time when it is damaged.

[0047] The clamping member 22 includes: a mounting bracket 221 disposed on the base 1; a driving member 222 disposed on the mounting bracket 221 along the vertical direction, and a driving end of the driving member 222 is connected to the clamping block 220 for pushing the clamping block 220 to move along the direction of the step groove 200.

[0048] refer to Figure 1 When the workpiece to be punched is placed in the above-mentioned step groove 200, the driving member 222 can drive the clamping block 220 to approach the step groove 200, and finally clamp the workpiece and fix it on the fixed seat 20. Similarly, during the tooling of the workpiece to be punched, the clamping block 220 can also move away from the fixed seat 20 along with the driving end of the driving member 222, effectively avoiding damage caused by collision between the workpiece and the clamping block 220 during tooling. The overall structure is simple and has good stability. It should be noted that the driving member 222 in this scheme can be a hydraulic drive, a cylinder drive or other drive devices.

[0049] Preferably, the present solution may further include an arc block 23 on the base 1, such as Figure 6As shown, the arc block 23 is located on both sides of the fixed seat 20, and the arc block 23 extends to the front end of the fixed seat 20 close to the punch 31. When the workpiece to be punched is placed in the step groove 200, the arc block 23 can cooperate with the above-mentioned step groove 200 to stably support the workpiece on the fixed seat 20, thereby effectively avoiding shaking at the position of the workpiece to be punched.

[0050] The punching mechanism 3 includes: a moving block 33, which is slidably arranged on the base 1, the punch 31 is connected to the moving block 33, the moving block 33 is provided with a guide hole 330, one end of the elastic member 32 is connected to the guide hole 330, and the other end is connected to the pre-pressing block 30; a connecting member 34, the moving block 33 is provided with a stepped hole 331 connected to the guide hole 330, one end of the connecting member 34 is connected to the pre-pressing block 30, and the other end is movably pressed against the inner wall of the stepped hole 331, and the elastic member 32 is sleeved on the On the connecting piece 34; the guide column 35 is arranged in the fixing mechanism 2, the pre-pressing block 30 is provided with a through hole 300, and the moving block 33 is provided with a connecting hole 332 which is coaxially arranged with the through hole 300, and the end of the guide column 35 away from the fixing mechanism 2 passes through the through hole 300 and is movably inserted in the connecting hole 332; the pushing block cylinder 36 is arranged on the base 1, and the driving end of the pushing block cylinder 36 is connected to the moving block 33, which is used to push the moving block 33 towards or away from the fixing mechanism 2.

[0051] refer to Figures 2 to 5 When the workpiece to be punched is completed, the push block cylinder 36 can push the moving block 33 along Figure 2 The workpiece moves to the right close to the fixed seat 20, and when the pre-pressing block 30 is pre-pressed against the side wall of the workpiece, the pushing block cylinder 36 continues to push the moving block 33 to move, and the elastic member 32 begins to compress due to the movement of the moving block 33 and pushes the pre-pressing block 30 against the workpiece, and finally, in the process of the pre-pressing block 30 pressing against the workpiece, the punch 31 completes the punching of the specified position of the workpiece; since one end of the elastic member 32 is connected to the guide hole 330 of the moving block 33 and the other end is connected to the pre-pressing block 30, the elastic member 32 still applies a force to the pre-pressing block 30 to press against the workpiece in the process of the pushing block cylinder 36 driving the punch 31 to separate from the workpiece, thereby ensuring that the punch 31 will not bring the workpiece away from the step groove 200 when it is separated. During this process, the guide hole 330 provides a guiding function for the elastic member 32 during elastic contraction and expansion, ensuring that the elastic member 32 stably applies the force of the pre-pressing block 30 against the workpiece, and the guide column 35 passes through the through hole 300 and is movably inserted in the connecting hole 332 of the movable block 33, so that the movable block 33 and the pre-pressing block 30 can always move stably along the axial direction of the guide column 35, ensuring that the pre-pressing block 30 is stably pressed against the workpiece while improving the accuracy and stability of the punch 31 in punching the workpiece.

[0052] refer to Figure 4The right end of the connecting member 34 is connected to the pre-pressing block 30 by a threaded connection (not shown in the figure), and the elastic member 32 is sleeved on the connecting member 34, which also plays a certain guiding and limiting role in the elastic contraction or expansion of the elastic member 32, and the step block formed on the left side of the connecting member 34 moves in the stepped hole 331 of the moving block 33. Figure 2 When moving to the right, the pre-pressing block 30 is mainly pressed against the workpiece by the elastic member 32. After the punch 31 is separated from the workpiece, the connecting member 34 can be pushed by the stepped hole 331 to drive the pre-pressing block 30 away from the punching hole after the punching is completed, thereby effectively avoiding the elastic member 32 frequently driving the pre-pressing block 30 to move and cause damage. It should be noted that the connecting member 34 in this scheme can be a component with a threaded end, such as a screw.

[0053] Preferably, if Figure 3 As shown, in the present embodiment, three groups of stepped holes 331 and guide holes 330 are respectively arranged on the movable block 33, and these three groups are distributed in a triangular shape on the movable block 33, i.e., three groups of elastic members 32 connected to the pre-pressing block 30, which further improves the stability of the pre-pressing block 30 when it is pressed against the workpiece.

[0054] In this solution, symmetrically distributed limit blocks 37 are provided on the base 1, and engaging blocks 333 are provided on both sides of the moving block 33. Figure 3 As shown, in the process of the pushing cylinder 36 pushing the moving block 33 close to the fixed seat 20, the locking block 333 is movably locked in the locking groove 370, which further ensures the stability of the moving block 33 during the movement process and effectively avoids the movement of the moving block 33 and affects the stability of the punch 31 in punching the workpiece.

[0055] In order to determine the depth of the punch 31 when punching, the present invention provides a mutually connected limiting groove 301 and a contour hole 302 on the pre-pressing block 30, such as Figure 5 As shown, the profiling hole 302 is consistent with the shape of the punch 31, so that the punch 31 can pass through the profiling hole 302 to complete the punching operation on the workpiece when the pre-pressing block 30 is pressed against the workpiece; and the limiting groove 301 can limit the depth of the punch 31 punching the workpiece, that is, the distance that the punch 31 can extend into the above-mentioned clearance hole 210 after passing through the workpiece to complete the punching operation. This method effectively ensures the working efficiency of the punch 31 when punching, and avoids the punch 31 punching The depth is too large and prolongs the retraction stroke of the punch 31.

[0056] Continue to refer Figure 5, the punch 31 is closely related to the punching quality of the workpiece, so this solution is provided with a pressing plate 334 and a mounting groove 335 on the moving block 33, a locking groove 334a is formed on the pressing plate 334, and a protruding block 310 is formed on the punch 31. During the installation of the punch 31, the worker can place the punch 31 in the mounting groove 335 in advance, and then the workpiece presses the pressing plate 334 on the punch 31, and the locking groove 334a is sleeved on the protruding block 310 to limit the displacement of the punch 31 relative to the moving block 33, thereby ensuring the stability of the punch 31. It should be noted that this solution detachably sets the pressing plate 334 on the moving block 33, such as screws, etc., which not only achieves the installation stability of the punch 31 in this way, but also facilitates the timely disassembly and replacement of the punch 31 when it is damaged, thereby improving convenience.

[0057] Preferably, the present solution further provides a sensor 40 on the limit block 37. When the workpiece to be punched is placed in the above-mentioned arc block 23 and the step groove 200, the sensor 40 can be used to detect whether the workpiece to be punched is in the accurate punching position. Only after the sensor 40 has passed the detection, the push block cylinder 36 can be started to drive the punch 31 to complete the punching of the workpiece, thereby improving the safety and stability of the punching device during operation.

[0058] Furthermore, the present invention also provides a detachable auxiliary block 10 on the base 1, such as Figure 6 As shown, when the auxiliary block 10 is placed in the base 1, the top walls of the two are in a flush state to ensure that there is no position interference when the components move. In addition, in this solution, the moving block 33 is slidably set on the auxiliary block 10, that is, the worker can add lubricants to the auxiliary block 10 to improve the smoothness of the moving block 33 during movement. At the same time, the auxiliary block 10 can be replaced after wear to avoid excessive material loss caused by replacing the entire base 1.

[0059] It should be noted that the elastic member 32 described herein may be a compression spring, a return spring or other elastic devices.

[0060] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A punching device, characterized in that: include: abutment; A fixing mechanism, arranged on the base, for placing a workpiece to be processed and limiting displacement of the workpiece relative to the base; A punching mechanism is movably arranged on the base, the punching mechanism comprises a pre-pressing block and a punch, an elastic member is connected between the pre-pressing block and the punching mechanism, the elastic member is used to push the pre-pressing block against the workpiece to be processed; the punch is movably inserted in the pre-pressing block and punches the workpiece; When the elastic member contracts and presses the pre-pressing block against the workpiece to be processed, the punch can penetrate the pre-pressing block to punch the workpiece; When the punching mechanism drives the punch away from the processed workpiece, the pre-pressing block abuts against the processed workpiece, thereby preventing the punch from bringing the workpiece away from the fixing mechanism.

2. A punching device according to claim 1, characterized in that: The punching mechanism comprises: A moving block is slidably arranged on the base, the punch is connected to the moving block, a guide hole is provided on the moving block, one end of the elastic member is connected to the guide hole, and the other end is connected to the pre-pressing block; A connecting piece, wherein the moving block is provided with a stepped hole connected to the guide hole, one end of the connecting piece is connected to the pre-pressing block, and the other end is movably pressed against the inner wall of the stepped hole, and the elastic piece is sleeved on the connecting piece; A guide column is arranged in the fixing mechanism, the pre-pressing block is provided with a through hole, the moving block is provided with a connecting hole arranged coaxially with the through hole, and one end of the guide column away from the fixing mechanism passes through the through hole and is movably inserted in the connecting hole; The block-pushing cylinder is arranged on the base, and the driving end of the block-pushing cylinder is connected to the moving block, so as to push the moving block to approach or move away along the direction of the fixing mechanism.

3. A punching device according to claim 1, characterized in that: The fixing mechanism comprises: A fixing seat is arranged on the base, and a step groove is formed on the end of the fixing seat close to the punching mechanism, and the workpiece to be processed is closely attached to the step groove; A profiling block, wherein a fixing groove is provided in the fixing seat, the profiling block is movably connected in the fixing groove, and a clearance hole is provided on the profiling block, and the clearance hole is for the punch to pass through; A pressing member is arranged on the base and located above the fixing seat. A pressing block is movably arranged on the pressing member, and the pressing block is used to press the workpiece onto the step groove.

4. A punching device according to claim 3, characterized in that: The pressing member comprises: A mounting bracket, arranged on the base; A driving member is arranged on the mounting bracket along a vertical direction, and a driving end of the driving member is connected to the pressing block to push the pressing block to move along the direction of the step groove.

5. A punching device according to claim 2, characterized in that: The punching mechanism further comprises limiting blocks symmetrically distributed on the base, wherein a clamping groove is formed on the limiting blocks, and clamping blocks are arranged on both sides of the moving block, and the clamping blocks are movably clamped in the clamping groove.

6. A punching device according to claim 3, characterized in that: The pre-pressing block is provided with a limiting groove and a contour hole which are interconnected. The contour hole allows the punch to pass through to punch the workpiece; the limiting groove is used to limit the depth of the punch punching the workpiece.

7. A punching device according to claim 2, characterized in that: The moving block is provided with a pressing plate and a mounting groove, the pressing plate is formed with a locking groove, and the punch is formed with a protruding block; When the punch is placed in the mounting groove, the pressing plate is pressed against the punch, so that the locking groove is sleeved on the protruding block to limit the displacement of the punch relative to the moving block.

8. A punching device according to claim 5, characterized in that: The limit block is also provided with a sensor, and the sensor is used to detect the position of the workpiece to be processed.

9. A punching device according to claim 3, characterized in that: The base is also provided with arc blocks located on both sides of the fixing seat, and the arc blocks extend to the front end of the fixing seat close to the punch, and are used to cooperate with the step groove to support the workpiece to be processed.

10. A punching device according to claim 2, characterized in that: The base is provided with a detachable auxiliary block capable of adding lubricant, and the moving block is slidably arranged on the auxiliary block.

Images