Punching jig

Abstract

The punching jig comprises an operation table, a clamping assembly, a second supporting part and a punching part, and a fixing groove is formed in the upper surface of the operation table; the clamping assembly is arranged on one side of the operation table and comprises a first supporting part and a telescopic clamping part connected with the first supporting part, and the telescopic direction of the clamping part is perpendicular to the first groove wall of the fixing groove so that the clamping part can be matched with the first groove wall to clamp the device to be punched; the first end of the second supporting part is connected with the first supporting part through the first telescopic part; the punching part is connected with the second end of the second supporting part through the second telescopic part, and the projection of the punching part on the plane where the groove bottom of the fixing groove is located is located in the fixing groove. In this way, the clamping part is telescopic and adapts to electrical wiring ducts of different sizes, the universality of the jig is improved, the application range of the jig is widened, it is ensured that the electrical wiring duct to be punched is kept fixed in the punching process, potential safety hazards caused by movement of the electrical wiring duct are avoided, and the punching quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field especially, relates to a kind of punching jig. BACKGROUND

[0002] Electrical wiring duct is a kind of workpiece for electrical equipment internal wiring, mainly for electrical equipment internal wiring, the bottom of general electrical wiring duct generally has a small number of mounting holes, if hole is increased as special needs, it is processed by oneself.

[0003] In prior art, electrical wiring duct is mostly plastic material, when processing this hole, hand drill or small bench drill is generally used, however, when processing plastic material wiring duct, due to the toughness and easy deformation characteristics of plastic, using traditional processing tool, ideal processing precision is often difficult to achieve, the position of hole is prone to larger deviation, there is greater limitation in processing precision, production cost and processing time are increased, ultimately affect the overall quality of electrical wiring duct, simultaneously, in the process of punching, if operation is improper or equipment fails, it can bring safety risk to operator. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the utility model provides a kind of punching jig.

[0005] The utility model provides a kind of punching jig, it includes:

[0006] Operation platform, the upper surface of operation platform is provided with fixed groove;

[0007] Clamping assembly is arranged at one side of operation platform, and clamping assembly includes first support part and scalable clamping part connected with first support part, and the telescopic direction of clamping part is perpendicular to the first groove wall of fixed groove, to be clamped with first groove wall and be clamped with the device to be punched;

[0008] Second support part, second support part is arranged in L shape, and the first end of second support part is connected with first support part by first telescopic part;

[0009] Punching part, the second end of second support part is connected with second telescopic part, and the projection of punching part on the plane where groove bottom of fixed groove is located is located in fixed groove.

[0010] In some embodiments of the present disclosure, the inside of the first support part is provided with a first sliding groove, the opening of the first sliding groove faces the first end of the second support part, the first telescopic part is slidingly arranged in the first sliding groove, and the first telescopic part can slide and stretch along the height direction of the first support part.

[0011] In some embodiments of the present disclosure, the first telescopic part comprises a first embedded telescopic plate, one end of the first embedded telescopic plate is installed in the first sliding groove, and the other end of the first embedded telescopic plate is connected with the second supporting part.

[0012] In some embodiments of the present disclosure, two opposite outer side walls of the first embedded telescopic plate are respectively provided with clamping grooves, and the inner wall of the first sliding groove is provided with a moving guide plate matched with the clamping grooves, and the moving guide plate is in sliding connection with the clamping grooves.

[0013] In some embodiments of the present disclosure, a plurality of buffer plates are sequentially connected between the bottom of the first embedded telescopic plate and the groove bottom of the first sliding groove.

[0014] In some embodiments of the present disclosure, the second supporting part comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are perpendicularly connected in L shape, the lower end of the first connecting plate is fixedly connected with the first embedded telescopic plate;

[0015] The second connecting plate is arranged in parallel with the operation table, the second connecting plate is internally provided with a second sliding groove, the groove opening of the second sliding groove faces the punching part, and the second telescopic part is arranged in the second sliding groove.

[0016] In some embodiments of the present disclosure, the second telescopic part comprises a second embedded telescopic plate, one end of the second embedded telescopic plate is slidingly installed in the second sliding groove, and the other end of the second embedded telescopic plate is connected with the punching part.

[0017] In some embodiments of the present disclosure, the punching part comprises a mounting plate, a power member is mounted above the mounting plate, a hydraulic rod is arranged below the mounting plate, and the hydraulic rod is connected with the output end of the power member through the mounting plate;

[0018] A first punching shaft and a second punching shaft are sequentially connected at the lower end of the hydraulic rod, and the outer surfaces of the first punching shaft and the second punching shaft are both provided with a first thread.

[0019] In some embodiments of the present disclosure, a threaded connecting shaft is arranged at the connection between the first punching shaft and the second punching shaft, and the outer surface of the threaded connecting shaft is provided with a second thread.

[0020] In some embodiments of the present disclosure, the clamping part comprises an extension plate and a clamping plate, the extension plate is installed on the side wall of the first supporting part close to the side of the operation table, and the extension plate is connected with the clamping plate through an elastic member.

[0021] The clamping plate is arranged in parallel with the groove wall of the fixed groove.

[0022] The perforating jig has at least the following advantages:

[0023] The perforating jig has at least the following advantages: BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0025] Figure 1 The structure schematic diagram of the perforating jig provided by an exemplary embodiment of the present utility model is shown in the figure.

[0026] Figure 2 The structure schematic diagram of the first support part and the second support part provided by an exemplary embodiment of the present utility model is shown in the figure.

[0027] Figure 3 The structure schematic diagram of the first support part and the second support part provided by an exemplary embodiment of the present utility model is shown in the figure. Figure 2 The enlarged structure schematic diagram of A in the figure.

[0028] Figure 4 The structure schematic diagram of the perforating part provided by an exemplary embodiment of the present utility model is shown in the figure.

[0029] The marks in the drawings are as follows:

[0030] 1, base;

[0031] 2, operation table; 210, fixed groove;

[0032] 3, first support part; 301, moving guide plate; 302, buffer plate;

[0033] 4, clamping part; 410, extension plate; 420, clamping plate; 430, elastic member;

[0034] 5、second support part; 510、first connecting plate; 520、second connecting plate;

[0035] 6、first telescopic part; 610、first embedded telescopic plate; 611、clamping groove;

[0036] 7、punching part; 710、mounting plate; 720、power element; 730、hydraulic rod; 740、first punching shaft; 750、second punching shaft; 760、threaded connecting shaft;

[0037] 8、second embedded telescopic plate. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0039] In this document, reference to something being "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments. Those skilled in the art will appreciate that the embodiments described herein are merely examples of the application and are not the only way in which the application can be practiced.

[0040] The electrical wiring slot is a workpiece for internal wiring of electrical equipment, which is made of PVC plastic and has the characteristics of insulation, arc prevention, flame retardation and self-extinction. It is mainly used for internal wiring of electrical equipment and plays a mechanical protection and electrical protection role for the laid wires in the electrical equipment. Correspondingly, in order to arrange the internal wires reasonably and orderly, a punching jig is needed to form multiple holes in the interior to guide the wire body to move. After using the product, the wiring is convenient, the wiring is neat, the installation is reliable, and it is convenient to find, maintain and replace the line. The jig is a large category of tools for woodworking, blacksmithing, bench work, machinery, electrical control and other handicrafts, which is mainly used as a tool to assist in controlling position or action (or both).

[0041] In the existing technology, most electrical wiring ducts are made of plastic. The holes for these ducts are generally made using a hand drill or a small bench drill. However, when machining wiring ducts made of plastic, due to the toughness and easy deformation of plastic, it is often difficult to achieve the ideal machining accuracy using traditional machining tools. The position of the holes is prone to large deviations, which has significant limitations in terms of machining accuracy. This increases production costs and processing time, and ultimately affects the overall quality of the electrical wiring duct. At the same time, improper operation or equipment failure during the drilling process may pose safety risks to the operators.

[0042] The following is combined Figures 1-4 The embodiments of this utility model are further described below.

[0043] To address the aforementioned technical problems, this utility model provides a drilling fixture. Through the retractable clamping part in the clamping assembly, it can adapt to electrical wiring troughs of different sizes and shapes, providing flexible and stable clamping, thus increasing the fixture's versatility and range of applications. The combined use of the clamping assembly and the fixing slot ensures that the electrical wiring trough to be drilled remains fixed during the drilling process, avoiding safety hazards caused by the movement of the electrical wiring trough. Simultaneously, the first support part and the second support part are connected by a first telescopic part, and the second support part and the drilling part are connected by a second telescopic part, allowing the drilling part to be adjusted in position and height as needed. This facilitates easy adjustment of the drilling position, making the drilling operation more precise and efficient, further enhancing the fixture's flexibility and adaptability, and greatly improving work efficiency and drilling quality.

[0044] An exemplary embodiment of this disclosure provides a punching fixture, such as Figure 1 As shown, the device includes an operating table 2, a clamping assembly, a second support 5, and a punching part 7. A fixing groove 210 is provided on the upper surface of the operating table 2. The clamping assembly is located on one side of the operating table 2 and includes a first support 3 and a retractable clamping part 4 connected to the first support 3. The retraction direction of the clamping part 4 is perpendicular to the first groove wall of the fixing groove 210, so as to cooperate with the first groove wall to clamp the device to be punched. For example, a base 1 is also provided below the operating table 2 to provide stable support for the operating table 2. In use, the electrical wiring trough to be drilled is placed in the fixing groove 210. Then, by adjusting the clamping part 4, the two opposite sides of the electrical wiring trough to be drilled are made to abut against the first groove wall of the fixing groove 210 and the clamping part 4, respectively. The electrical wiring trough to be drilled is fixed by the clamping part 4 and the groove wall of the fixing groove 210. No additional tightening operation is required. This can achieve fast and stable clamping of the electrical wiring trough, and can accurately clamp electrical wiring troughs of different sizes and shapes, avoiding movement or shaking of the electrical wiring trough during the drilling process.

[0045] The second supporting part 5 is arranged in an L shape, the first end of the second supporting part 5 is connected with the first supporting part 3 through the first telescopic part 6, and the punching part 7 is connected with the second end of the second supporting part 5 through the second telescopic part, and the projection of the punching part 7 on the plane of the groove bottom of the fixing groove 210 is located in the fixing groove 210. In this way, the second supporting part 5 is arranged in an L shape, the first end of the second supporting part 5 is connected with the first supporting part 3 through the first telescopic part 6, and the punching part 7 is connected with the second end of the second supporting part 5 through the second telescopic part, thereby further enhancing the flexibility and adaptability of the punching jig, so that the punching part 7 can easily reach any position of the electrical wiring groove to be punched, and the position and height of the punching part 7 can be adjusted as required, thereby expanding the use range.

[0046] In some embodiments of the utility model, refer to Figure 1 、 Figure 2 and Figure 3 The first sliding groove is arranged in the first supporting part 3, the opening of the first sliding groove faces the first end of the second supporting part 5, and the first telescopic part 6 is slidably arranged in the first sliding groove, and the first telescopic part 6 can slide and stretch out and shrink in the height direction of the first supporting part 3. In this way, the first telescopic part 6 can slide and stretch out and shrink in the height direction of the first supporting part 3, so that the user can easily adjust the height of the second supporting part 5 and the punching part 7 connected with the second supporting part 5 as required, so as to adapt to electrical wiring grooves to be punched of different sizes and shapes, and the adaptability of the jig is improved.

[0047] In some embodiments of the utility model, refer to Figure 1 、 Figure 2 and Figure 3 The first telescopic part 6 comprises a first embedded telescopic plate 610, one end of the first embedded telescopic plate 610 is mounted in the first sliding groove, and the other end of the first embedded telescopic plate 610 is connected with the second supporting part 5. The first embedded telescopic plate 610 can be made of high-strength and wear-resistant materials such as stainless steel and aluminum alloy, and can resist impact and wear during punching, thereby prolonging the service life of the jig. In this way, one end of the first embedded telescopic plate 610 is slidably connected in the first sliding groove, and the other end is connected with the second supporting part 5, so that the user can accurately control the height of the second supporting part 5 and the punching part 7 by adjusting the position of the first embedded telescopic plate 610 in the first sliding groove, so as to adapt to electrical wiring grooves to be punched of different sizes and shapes, and the adaptability and flexibility of the punching jig are improved.

[0048] In some embodiments of the utility model, refer to Figure 1 、 Figure 2 and Figure 3The two opposite outer side walls of the first embedded telescopic plate 610 are respectively provided with clamping grooves 611, the inner wall of the first sliding groove is provided with moving guide plates 301 matched with the clamping grooves 611, and the moving guide plates 301 are in sliding connection with the clamping grooves 611. That is, the moving guide plates 301 are clamped in the clamping grooves 611, and the moving guide plates 301 can slide along the length direction of the clamping grooves 611. In this way, the moving guide plates 301 are clamped in the clamping grooves 611, which provides a clear guide for the first embedded telescopic plate 610, ensures the stability and accuracy of the telescopic plate during sliding, and reduces errors caused by deviation or shaking. At the same time, the close cooperation of the moving guide plates 301 and the clamping grooves 611 increases the connection strength between the first embedded telescopic plate 610 and the first sliding groove, which helps to prevent the telescopic plate from deforming or being damaged when bearing high load, and improves the overall structural strength of the jig.

[0049] In some embodiments of the present application, referring to Figure 1 , Figure 2 and Figure 3 , a plurality of buffer plates 302 connected in sequence are arranged between the bottom of the first embedded telescopic plate 610 and the groove bottom of the first sliding groove. Figure 1 Exemplarily, referring to , a plurality of buffer plates 302 connected in sequence are arranged between the bottom of the first embedded telescopic plate 610 and the groove bottom of the first sliding groove, and the plurality of buffer plates 302 are arranged in a zigzag shape. The plurality of buffer plates 302 can more effectively absorb and disperse impact force. Since there is a certain angle and height difference between each buffer plate 302, when the first embedded telescopic plate 610 is impacted during sliding, the impact force can be gradually absorbed and dispersed by the plurality of buffer plates 302, thereby greatly reducing the direct damage to the jig, reducing the shaking and deviation of the first embedded telescopic plate 610 during sliding, enabling the first embedded telescopic plate 610 to move more stably in the first sliding groove, and ensuring the stability and accuracy of the punching jig during operation.

[0050] Figure 2 In some embodiments of the present application, referring to Figure 3 , Figure 2The second support part 5 comprises a first connecting plate 510 and a second connecting plate 520, the first connecting plate 510 and the second connecting plate 520 are connected perpendicularly in an L shape, the lower end of the first connecting plate 510 is fixedly connected with the first embedded expansion plate 610; the second connecting plate 520 is arranged in parallel with the operation table 2, the inside of the second connecting plate 520 is provided with a second sliding groove, the opening of the second sliding groove faces the punching part 7, and the second expansion part is arranged in the second sliding groove. The first connecting plate 510 and the second connecting plate 520 are connected perpendicularly in an L shape, thereby forming a stable support structure, reducing shaking and deviation in the punching process, and improving punching precision. In addition, the second connecting plate 520 is arranged in parallel with the operation table 2, and the inside of the second connecting plate 520 is provided with the second sliding groove, and the second expansion part can be flexibly adjusted in position in the second sliding groove, so as to adapt to electrical wiring slots of different sizes and shapes to be punched.

[0051] In some embodiments of the utility model, refer to Figure 1 The second expansion part comprises a second embedded expansion plate 8, one end of the second embedded expansion plate 8 is slidingly installed in the second sliding groove, and the other end of the second embedded expansion plate 8 is connected with the punching part 7. The second embedded expansion plate 8 can be made of high-strength and wear-resistant materials such as stainless steel and aluminum alloy, which can resist impact and wear during punching, thereby prolonging the service life of the jig. The close fit of the second embedded expansion plate 8 with the second sliding groove and the direct connection with the punching part 7 can minimize the volume and weight while maintaining high performance of the punching jig. The sliding installation mode allows the jig to be stored more compactly when not in use, optimizing space utilization. Since the second embedded expansion plate 8 can slide in the second sliding groove, the position of the punching part 7 can be easily adjusted, so that the punching jig can adapt to electrical wiring slots of different sizes and shapes to be punched, improving the flexibility and adaptability of punching. By controlling the sliding distance of the second embedded expansion plate 8, accurate adjustment of the punching position can be achieved, thereby improving the punching precision.

[0052] In some embodiments of the utility model, refer to Figure 2 and Figure 3The punching part 7 comprises a mounting plate 710, and a power element 720 is mounted above the mounting plate 710, wherein the power element 720 comprises a hydraulic machine. A hydraulic rod 730 is arranged below the mounting plate 710 and connected with an output end of the power element 720 in a penetrating mode; a first punching shaft 740 and a second punching shaft 750 are sequentially arranged at a lower end of the hydraulic rod 730, and the outer surfaces of the first punching shaft 740 and the second punching shaft 750 are provided with first threads. Exemplarily, the power element 720 is connected with the punching shaft through the hydraulic rod 730, so that efficient power transmission is realized; the hydraulic rod 730 serves as a transmission medium and can convert the rotation or linear motion of the power element 720 into the required motion form of the punching shaft, thereby driving the punching shaft to perform the punching operation, which helps to ensure the accuracy of the punching position, improves the punching precision, and the first threads arranged on the outer surfaces of the punching shafts can enhance the friction between the punching shafts and the electrical wiring ducts to be punched, so that the punching process is more stable and powerful.

[0053] In some embodiments of the utility model, refer to Figure 1 and Figure 1 A threaded connecting shaft 760 is arranged at the connection position of the first punching shaft 740 and the second punching shaft 750, and the outer surface of the threaded connecting shaft 760 is provided with second threads. The first punching shaft 740 and the second punching shaft 750 are connected through the threaded connecting shaft 760, so that the punching shafts can work more stably, and different types of second punching shafts 750 can be replaced and fixed. The first punching shaft 740 and the second punching shaft 750 are tightly connected and fixed through the threaded connecting shaft 760, so that relative movement or loosening between the two shafts can be avoided during the punching process, thereby ensuring the precision and stability of the punching, and the threaded connecting shaft 760 can be conveniently replaced, so that when the electrical wiring ducts to be punched with different sizes, shapes or materials need to be adapted, the threaded connecting shaft 760 is loosened, the appropriate second punching shaft 750 is replaced, and then the threaded connecting shaft 760 is tightened, thereby improving the flexibility and adaptability of the punching jig, so that the jig can cope with more types of punching tasks.

[0054] In some embodiments of the utility model, refer to Figure 4 Figure 1 Figure 4 Figure 1The clamping part 4 comprises an extension plate 410 and a clamping plate 420, the extension plate 410 is installed on the side wall of the first supporting part 3 close to the operation table 2, the extension plate 410 is connected with the clamping plate 420 through an elastic element 430, and the clamping plate 420 is arranged in parallel with the groove wall of the fixed groove 210. Wherein, the extension plate 410 and the first supporting part 3 can be connected by means of glue, welding and the like; and the elastic element 430 can be a spring, an elastic sheet or the like. In use, the electrical wiring duct to be punched is placed in the fixed groove 210, so that the two opposite side edges of the electrical wiring duct to be punched abut against the clamping plate 420 and the groove wall of the fixed groove 210 respectively, the electrical wiring duct to be punched is fixed by the clamping plate 420 and the groove wall of the fixed groove 210, and no additional fastening operation is needed, so that the electrical wiring duct can be quickly and stably clamped, the movement or shaking of the electrical wiring duct in the punching process is avoided, the accurate positioning of the electrical wiring duct in the punching process is ensured, and the punching precision and efficiency are improved.

[0055] In addition, the extension plate 410 is installed on the side wall of the first supporting part 3 close to the operation table 2, thereby providing a stable support point for the clamping plate 420, and the clamping plate 420 is arranged in parallel with the groove wall of the fixed groove 210, so that the electrical wiring duct to be punched can be clamped between two planes uniformly, and the deviation or damage caused by uneven clamping is avoided. The extension plate 410 and the clamping plate 420 are connected through the elastic element 430, so that the clamping plate 420 can be elastically adjusted according to the thickness and size of the electrical wiring duct to be punched, the adaptability of the punching jig to electrical wiring ducts of different specifications is improved, and a certain buffer can be provided during clamping to protect the electrical wiring duct from being damaged.

[0056] The above description can be implemented alone or in various combinations, and these variants are within the protection scope of the utility model.

[0057] It should be noted that, in this document, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that includes a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0058] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not limit it. Although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A punching fixture, characterized in that, include: The operating table has a fixing groove on its upper surface; A clamping assembly is disposed on one side of the operating table. The clamping assembly includes a first support part and a retractable clamping part connected to the first support part. The extension and retraction direction of the clamping part is perpendicular to the first groove wall of the fixing groove, so as to cooperate with the first groove wall to clamp the device to be punched. The second support part is L-shaped, and the first end of the second support part is connected to the first support part through the first telescopic part. The perforated part is connected to the second end of the second support part through the second telescopic part, and the projection of the perforated part on the plane where the bottom of the fixed groove is located is located inside the fixed groove.

2. The punching fixture according to claim 1, characterized in that, The first support portion has a first sliding groove inside, the opening of the first sliding groove faces the first end of the second support portion, the first telescopic portion is slidably disposed in the first sliding groove, and the first telescopic portion can slide and extend along the height direction of the first support portion.

3. The punching fixture according to claim 2, characterized in that, The first telescopic part includes a first embedded telescopic plate, one end of which is installed in the first sliding groove, and the other end of which is connected to the second support part.

4. The punching fixture according to claim 3, characterized in that, The first embedded telescopic plate has clamping grooves on its two opposite outer side walls, and the inner wall of the first sliding groove has a movable guide plate that is adapted to the clamping grooves. The movable guide plate is slidably connected to the clamping grooves.

5. The punching fixture according to claim 3, characterized in that, Multiple buffer plates are provided between the bottom of the first embedded telescopic plate and the bottom of the first sliding groove, connected in sequence.

6. The punching fixture according to claim 3, characterized in that, The second support includes a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are connected perpendicularly to each other in an L-shape. The lower end of the first connecting plate is fixedly connected to the first embedded telescopic plate. The second connecting plate is arranged parallel to the operating table. The interior of the second connecting plate is provided with a second sliding groove, the opening of the second sliding groove facing the punched part, and the second telescopic part is disposed in the second sliding groove.

7. The punching fixture according to claim 6, characterized in that, The second telescopic part includes a second embedded telescopic plate, one end of which is slidably installed in the second sliding groove, and the other end of which is connected to the perforated part.

8. The punching fixture according to claim 1, characterized in that, The drilling section includes a mounting plate, a power component is mounted on the top of the mounting plate, and a hydraulic rod is provided below the mounting plate. The hydraulic rod passes through the mounting plate and is connected to the output end of the power component. The lower end of the hydraulic rod is provided with a first drilling shaft and a second drilling shaft connected in sequence, and the outer surfaces of the first drilling shaft and the second drilling shaft are both provided with a first thread.

9. The punching fixture according to claim 8, characterized in that, A threaded connecting shaft is provided at the connection between the first drilling shaft and the second drilling shaft, and the outer surface of the threaded connecting shaft is provided with a second thread.

10. The punching fixture according to any one of claims 1-9, characterized in that, The clamping part includes an extension plate and a clamping plate. The extension plate is installed on the side wall of the first support part near the operating table. The extension plate is connected to the clamping plate through an elastic element. The clamping plate is arranged parallel to the wall of the fixing groove.

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