Punching equipment for detection

Abstract

The utility model discloses punching equipment for detection, which comprises an upper die assembly, a lower die assembly and a lower die assembly, the upper die assembly comprises an upper supporting seat, an upper die seat and a male die which are sequentially arranged from top to bottom, and a plurality of cutting knives are arranged on the male die; the lower die assembly comprises a lower supporting base, a lower die base and a female die which are sequentially arranged from bottom to top. The female die is provided with a cutting hole matched with the cutting knife in a concave-convex mode, the lower die base is provided with a waste collecting groove, the waste collecting groove is formed under the cutting hole, and the cutting hole is communicated with the waste collecting groove. A guide mechanism; a driving mechanism; the cutting holes are cylindrical holes and comprise excessive glue cutting holes and / or positioning cutting holes. According to the utility model, through the cylindrical excessive glue cutting hole arranged on the female die and the cutting knife which is arranged on the male die and is matched with the excessive glue cutting hole in a concave-convex manner, an excessive glue hole for measuring the excessive glue amount and a positioning hole for measuring the size stability are formed on a detected product; the measurement precision is further improved, and the performance of the detected product is judged more accurately.

Description

Technical Field

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

[0002] In order to ensure the stability of the detection of the basic physical properties of the covering film and to adapt it to more specific applications, it is necessary to test the glue overflow and dimensional stability of the covering film; similarly, dimensional stability is also one of the detection performances of the copper clad laminate. In the existing technology, the detection of glue overflow is carried out by punching and cutting multiple groups of holes with different diameters on the surface of the covering film, and then the glue surface of the covering film is pressed with the copper foil at high temperature. After pressing, the glue on the glue surface of the covering film overflows from the holes, and the overflow amount of each hole is measured and the average value is taken. As shown above, several groups of holes are set and the average value of multiple groups is taken to detect the glue overflow and thus more accurately judge the performance of the product being tested. The dimensional stability is tested by cutting four holes along the longitudinal and transverse directions of the covering film, and measuring and comparing the distance between the two holes before and after the covering film is torn to measure the dimensional change and thus derive the dimensional stability.

[0003] In the above-mentioned process of testing the amount of glue overflow and dimensional stability of the covering film, it is necessary to punch holes in the covering film. In the prior art, punching can be done by using a stamping device, but the stamping die of the existing stamping device has the following defects: 1) it is impossible to punch out multiple groups of holes at the same time, and each group of holes has multiple holes with different diameters; 2) it is impossible to punch out holes at the same time that can detect both the amount of glue overflow and the dimensional stability (that is, on the same covering film, holes can be punched out at the corners, and multiple groups of holes with different diameters can be punched in the middle area). Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a punching device for detection, which punches and cuts out cutting holes on the inspected product to detect the amount of glue overflow and dimensional stability, thereby improving the accuracy and stability of subsequent detection of the inspected product.

[0005] In order to achieve the above technical effects, the technical solution of the utility model is: a punching device for detection, comprising:

[0006] The upper die assembly includes an upper support base, an upper die base and a punch which are sequentially arranged from top to bottom, wherein the punch is provided with a plurality of cutting knives;

[0007] The lower die assembly includes a lower support base, a lower die base, and a die set arranged in sequence from bottom to top; the die set is provided with a cutting hole that matches the cutting knife in a concave-convex manner; the lower die base is provided with a waste collection groove, the waste collection groove is provided directly below the cutting hole, and the cutting hole is connected to the waste collection groove;

[0008] The guide mechanism is a plurality of first guide columns provided between the upper support seat and the lower support seat; the distance between the upper mold assembly and the lower mold assembly is adjusted by the guide mechanism;

[0009] A driving mechanism connected to the upper support seat drives the upper die assembly to move relative to the lower die assembly in a vertical direction so that the male die and the female die are matched in a concave-convex manner;

[0010] The cutting holes are cylindrical holes, including overflow glue cutting holes and / or positioning cutting holes; the overflow glue cutting holes are provided in multiple groups with the same number and equal aperture; the apertures of the multiple overflow glue cutting holes in each group gradually decrease from the middle to both sides, and the aperture difference between adjacent overflow glue cutting holes is the same; the positioning cutting holes are provided at each vertex corner of the die.

[0011] A preferred technical solution is that limiting grooves are provided on two opposite sides of the upper die base, the notches of the two limiting grooves are arranged facing each other, and the punch is arranged between the two limiting grooves and fixed to the upper die base through the limiting grooves;

[0012] Along the length direction of the limiting slide, one end of the limiting slide is fixedly provided with a supporting member, and the other end is detachably provided with a locking pin; one side wall of the punch abuts against the supporting member, and the other opposite side wall limits the movement of the punch along the limiting slide through the locking pin.

[0013] A preferred technical solution is that a plurality of limiting columns are provided on the lower surface of the male die, and a limiting groove that is concave-convexly matched with the limiting columns is provided on the upper surface of the female die.

[0014] A preferred technical solution is that the upper mold assembly further includes a pressing plate, which is connected to the punch through the limiting column and moves along the limiting column;

[0015] Along the vertical direction, the limiting column includes a first limiting section and a second limiting section with a diameter larger than that of the first limiting section. The pressing plate is arranged in the first limiting section and moves along the first limiting section.

[0016] The preferred technical solution is that a compression spring and a second guide column are provided between the pressure plate and the punch, and the second guide column is passed through the compression spring; one of the pressure plate and the punch is fixedly connected to the second guide column, and the other is slidably connected to the second guide column.

[0017] A preferred technical solution is that a guide hole for the cutting knife to pass through is provided on the pressing plate.

[0018] A preferred technical solution is that the length of the cutting knife in the vertical direction is less than the distance from the lower surface of the pressing plate to the lower surface of the punch, and is greater than the sum of the minimum length of the compression spring and the thickness of the pressing plate.

[0019] The advantages and beneficial effects of the utility model are: through the cylindrical glue overflow cutting hole provided on the die, and the cutting knife provided on the punch and matched with the glue overflow cutting hole, the cutting hole and the cutting knife cooperate to form a glue overflow hole for measuring the amount of glue overflow on the cover film of the inspection product, and form a positioning hole for measuring dimensional stability on the cover film and the copper clad plate.

[0020] Multiple groups of overflow glue cutting holes are provided, each with multiple holes of varying diameters. This provides multiple reference values ​​for measuring the amount of overflow glue on the inspected product, further improving measurement accuracy and enabling more precise judgment of the inspected product's performance. The positioning cutting holes are dispersed circumferentially to create more dispersed positioning holes on the inspected product. This allows for greater spacing between positioning holes, resulting in larger and more comprehensive measurement parameters and higher accuracy in measuring dimensional stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 2. It is a schematic diagram of the three-dimensional structure of the punching device for detection in the embodiment;

[0022] Figure 2 This is a schematic diagram of the explosion structure of the punching equipment for detection in the embodiment;

[0023] Figure 3 Schematic diagram of the exploded structure of the punch and the pressing plate in the punching device for detection in the embodiment;

[0024] Figure 4 1. It is a schematic diagram of the three-dimensional structure of the female die and the lower die base in the punching equipment for detection in the embodiment;

[0025] Figure 5 1. It is a schematic diagram of the three-dimensional structure of the upper die base in the punching device for detection in the embodiment;

[0026] Figure 6 yes Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 7 is a front view structural diagram of a cutting knife in a punching device for detection according to another embodiment;

[0028] In the figure: 1. Upper mold assembly; 11. Upper support seat; 12. Upper mold seat; 121. Limiting slide; 1211. Notch; 1212. Bottom wall; 1213. Side wall; 122. Abutment; 13. Punch; 131. Cutting knife; 1311. Blade; 132. Limiting column; 1321. First limiting section; 1322. Second limiting section; 14. Pressing plate; 141. Guide hole; 15. Compression spring; 16. Second guide column; 2. Lower mold assembly; 21. Lower support seat; 22. Lower mold seat; 221. Waste collection trough; 23. Concave mold; 231. Cutting hole; 2311. Overfill cutting hole; 2312. Positioning cutting hole; 232. Limiting groove; 3. Guide mechanism; 31. First guide column; 4. Drive mechanism; 5. Lock pin. DETAILED DESCRIPTION

[0029] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means more than two; the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integrally molded connections; they can refer to mechanical connections or electrical connections; and they can refer to direct connections or indirect connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0032] like Figure 1-5 As shown, an embodiment of a punching device for detection includes:

[0033] The upper die assembly 1 includes an upper support base 11, an upper die base 12 and a punch 13 arranged in sequence from top to bottom. The punch 13 is provided with a plurality of cutting blades 131;

[0034] The lower die assembly 2 includes a lower support base 21, a lower die base 22, and a die 23, which are arranged in order from bottom to top. The die 23 is provided with a cutting hole 231 that mates with the cutting blade 131 in a concave-convex manner. The lower die base 22 is provided with a waste collection groove 221, which is arranged directly below the cutting hole 231 and is connected to the waste collection groove 221.

[0035] The guide mechanism 3 is a plurality of first guide posts 31 disposed between the upper support seat 11 and the lower support seat 21;

[0036] The driving mechanism 4 is connected to the upper support seat 11 and drives the upper die assembly 1 to move toward or away from the lower die assembly 2 along the guide mechanism 3 so that the punch 13 and the die 23 are matched with each other;

[0037] The cutting holes 231 are cylindrical holes, including overflow glue cutting holes 2311 and / or positioning cutting holes 2312; the overflow glue cutting holes 2311 are provided in multiple groups with the same number and equal aperture; the apertures of the multiple overflow glue cutting holes 2311 in each group gradually decrease from the middle to both sides, and the aperture difference between adjacent overflow glue cutting holes 2311 is the same; the positioning cutting holes 2312 are provided at each vertex of the die 23.

[0038] Through the cylindrical glue overflow cutting hole 2311 set on the die 23, and the cutting knife 131 set on the punch 13 that matches the glue overflow cutting hole 2311, the cutting hole 231 and the cutting knife 131 cooperate to form a glue overflow hole for measuring the amount of glue overflow on the covering film of the inspection product, and form a positioning hole for measuring dimensional stability on the covering film and the copper clad laminate.

[0039] There are multiple groups of overflow glue cutting holes 2311, and the number and aperture of the overflow glue cutting holes 2311 in each group are the same, thereby correspondingly forming multiple groups of overflow glue holes on the covering film or copper clad board. The more overflow glue holes there are, the more reference values ​​for overflow glue amount detection, and the higher the accuracy of overflow glue amount detection. Specifically, the overflow glue amount of each overflow glue hole is measured, and the average overflow glue amount of each group is calculated separately by group. Multiple groups are measured to improve measurement accuracy.

[0040] Furthermore, the overflow glue cutting holes 2311 are provided in multiple groups, and the multiple groups are at least three groups.

[0041] In this embodiment, three groups of overflow glue cutting holes 2311 are provided on the die 23. According to the industry standard requirements for measuring the amount of overflow glue, each group of overflow glue cutting holes 2311 includes 7 overflow glue cutting holes 2311. The apertures of the overflow glue cutting holes 2311 gradually decrease from the middle to both sides. The aperture difference between adjacent overflow glue cutting holes 2311 is the same. The apertures of the overflow glue cutting holes 2311 in each group are 1 / 16in, 1 / 8in, 3 / 16in, 1 / 4in, 3 / 16in, 1 / 8in, and 1 / 16in respectively (in represents inches).

[0042] Furthermore, the punch 13 can be cut and connected to the upper die base 12, and the die 23 can be detachably connected to the lower die base 22. The upper die assembly 1 can replace the punch 13 with different structural designs, and the corresponding lower die assembly 2 can replace the die 23 that matches the punch 13.

[0043] Optionally, the die 23 is provided with an overflow glue cutting hole 2311, and the punch 13 is provided with a cutting knife 131 that matches the overflow glue cutting hole 2311 in a concave and convex manner; or the die 23 is provided with a positioning cutting hole 2312, and the punch 13 is provided with a cutting knife 131 that matches the positioning cutting hole 2312 in a concave and convex manner; or the die 23 is provided with both the overflow glue cutting hole 2311 and the positioning cutting hole 2312, and the punch 13 is provided with a cutting knife 131 that matches the overflow glue cutting hole 2311 and the positioning cutting hole 2312 in a concave and convex manner.

[0044] Preferably, the concave die 23 is provided with a glue overflow cutting hole 2311 and a positioning cutting hole 2312, which cooperates with the convex die 13 to simultaneously punch glue overflow holes and positioning holes on the test product (for example, a covering film); this design does not require frequent mold replacement, provides convenience for measurement, and also reduces mold wear and shortens service life due to frequent replacement.

[0045] Furthermore, the driving mechanism 4 is a hydraulic press.

[0046] In this embodiment, the upper support seat 11 and the upper die seat 12 are fixed and locked by bolts; the lower support seat 21 and the lower die seat 22 are fixed and locked by bolts.

[0047] like Figure 3 、 Figure 6 As shown, the cutting knife 131 includes a blade 1311 , and the blade surface is parallel to the upper surface of the die 23 .

[0048] Specifically, when the blade surface is parallel to the upper surface of the die 23 , the punch 13 moves toward the die 23 in the vertical direction, and the blade surface contacts the film or copper-clad laminate to be cut in surface contact to complete the punching.

[0049] like Figure 7 As shown, the blade surface of the cutting knife 131 forms an angle with the upper surface of the die 23 .

[0050] Specifically, when the blade surface forms an angle with the upper surface of the die 23, the punch 13 moves vertically toward the die 23, and the blade surface first contacts the film or copper-clad laminate to be cut at a point or a small area. Then, as the distance between the punch 13 and the die 23 gradually decreases, the blade surface gradually contacts the film or copper-clad laminate to be cut, ultimately completing the punching. This arrangement of the cutting blade 131 makes it easier to pierce the film or copper-clad laminate to be cut, and even when the punch 13 moves slowly toward the die 23, efficient cutting can be achieved, resulting in a good cutting effect.

[0051] When the utility model is in use, after all the components are assembled, the driving mechanism 4 is started to work, driving the upper mold assembly 1 to move toward the lower mold assembly 2 in the vertical direction, and the cutting knife 131 is aligned with the cutting hole 231 and penetrates into the cutting hole 231 to cut the covering film or copper clad plate clamped between the punch 13 and the die 23, and the waste falls into the waste collecting trough 221 from the cutting hole 231; after the cutting is completed, the driving mechanism 4 moves away from the lower mold assembly 2 in the vertical direction, the punch 13 is separated from the die 23, and the covering film or copper clad plate is removed for subsequent operations.

[0052] like Figure 1-2 and Figure 4-5 As shown, in another preferred embodiment, limiting grooves 121 are provided on opposite sides of the upper die base 12, and the notches 1211 of the two limiting grooves 121 are arranged facing each other. The punch 13 is arranged between the two limiting grooves 121 and is fixed to the upper die base 12 through the limiting grooves 121;

[0053] Along the length direction of the limiting slide groove 121, a supporting member 122 is fixedly provided at one end of the limiting slide groove 121, and a locking pin 5 is detachably provided at the other end; one side wall 1213 of the punch 13 is against the supporting member 122, and the other side wall 1213 opposite to the punch 13 limits the movement of the punch 13 along the limiting slide groove 121 through the locking pin 5.

[0054] The first direction is the vertical direction and also the width direction of the limiting chute 121; the second direction is the length direction of the limiting chute 121; and the third direction is the thickness direction of the limiting chute 121.

[0055] The limiting slide groove 121 includes two side walls 1213 arranged opposite to each other in the vertical direction, a bottom wall 1212 connecting the two side walls 1213, and a notch 1211 opposite to the bottom wall 1212; the punch 13 is fixed in the vertical direction, i.e., the first direction, through the two side walls 1213 of the limiting slide groove 121.

[0056] The upper die base 12 includes two limiting grooves 121, and the notches 1211 of the two limiting grooves 121 are arranged facing each other; through the arrangement of the two limiting grooves 121, the punch 13 is clamped between the two limiting grooves 121. Specifically, the punch 13 is clamped between the two bottom walls 1212, and the punch 13 is fixed along the third direction.

[0057] The abutment member 122 and the locking pin 5 cooperate to limit the displacement of the punch 13 along the second direction; further, the locking pin 5 is detachably arranged to realize the detachability of the punch 13 and the upper die base 12, which is convenient for replacing different types of punches 13 and expanding the application scope of the utility model.

[0058] Furthermore, the lower die base 22 is also provided with a limiting sliding groove 121 and a locking pin 5 to connect the fixed die 23 and the lower die base 22 .

[0059] Furthermore, a handle is provided on one side wall 1213 of the punch 13 and the die 23 to facilitate taking and replacing the punch 13 and the die 23 .

[0060] like Figure 1-4 As shown, in another preferred embodiment, a plurality of limiting posts 132 are provided on the lower surface of the punch 13 , and a limiting groove 232 that is concave-convexly matched with the limiting posts 132 is provided on the upper surface of the die 23 .

[0061] By setting the limiting column 132 and the limiting groove 232, the concave and convex positions of the punch 13 and the die 23 can correspond and cooperate, so that the cutting knife 131 is aligned and inserted into the cutting hole 231 of the die 23, ensuring that the two are aligned and thus ensuring the precision and accuracy of cutting.

[0062] Furthermore, the sizes of the limiting columns 132 on different types of punches 13 are different, and thus the sizes of the limiting grooves 232 are also different, which facilitates automatic identification of whether the calibration punch 13 matches the corresponding die 23 of the same model as the punch 13.

[0063] like Figure 3 As shown, in another preferred embodiment, the upper mold assembly 1 further includes a pressing plate 14, which is connected to the punch 13 through a limiting column 132 and moves along the limiting column 132;

[0064] The limiting column 132 in the vertical direction includes a first limiting section 1321 and a second limiting section 1322 having a diameter larger than that of the first limiting section 1321 . The pressing plate 14 is disposed in the first limiting section 1321 and moves along the first limiting section 1321 .

[0065] The limiting posts 132 are provided to fix the pressing plate 14 and enable the pressing plate 14 to move along the limiting posts 132. The pressing plate 14 moves along the limiting posts 132 between the punch 13 and the second limiting section 1322.

[0066] Specifically, the limiting column 132 includes a first limiting section 1321 and a second limiting section 1322. The first limiting section 1321 and the second limiting section 1322 are both cylindrical and have different diameters. A limiting groove 232 with the same diameter as the second limiting section 1322 of the limiting column 132 is provided on the die 23, so that the limiting column 132 can move in the limiting groove 232.

[0067] like Figure 3 As shown, in another preferred embodiment, a compression spring 15 and a second guide rod are provided between the pressure plate 14 and the punch 13, and the second guide rod is passed through the compression spring 15; one of the pressure plate 14 and the punch 13 is fixedly connected to the second guide rod, and the other is slidably connected to the second guide rod.

[0068] The pressure plate 14 is arranged in cooperation with the compression spring 15 so that when the pressure plate 14 is not subjected to external force, the elastic force of the compression spring 15 maintains a gap between the pressure plate 14 and the punch 13 to protect the cutter from wear and tear, while improving safety and preventing the cutter from leaking out and causing harm to people; specifically, when the punch 13 is separated from the die 23, the pressure plate 14 and the punch 13 are separated by the elastic force of the compression spring 15 to restore the deformation, and the cutting knife 131 is between the pressure plate 14 and the punch 13, and is protected by the pressure plate 14 so as not to hurt the user and is not easily damaged.

[0069] The provision of the second guide rod limits the compression spring 15 from moving along the second guide rod (ie, in the vertical direction).

[0070] Furthermore, the moving distance of the second guide rod is equal to the compression length of the compression spring 15 .

[0071] When the second guide rod is fixedly connected to the pressure plate 14 and slidably connected to the punch 13, a cavity is provided in the punch 13 for the second guide rod to move in the vertical direction, and the thickness of the punch 13 is greater than the maximum compression length of the compression spring 15. When the second guide rod is fixedly connected to the punch 13 and slidably connected to the pressure plate 14, a cavity is provided in the pressure plate 14 for the second guide rod to move in the vertical direction, and the thickness of the pressure plate 14 is greater than the maximum compression length of the compression spring 15.

[0072] like Figure 3 As shown, in another preferred embodiment, the pressing plate 14 is provided with a guide hole 141 for the cutting knife 131 to pass through.

[0073] Furthermore, a guide hole 141 corresponding to the cutting blade 131 of the punch 13 is provided on the pressing plate 14 to improve the accuracy of positioning the cutting blade 131 of the punch 13 so as to align it with the cutting hole 231 on the die 23 .

[0074] like Figure 1-4 As shown, in another preferred embodiment, the length of the cutting knife 131 in the vertical direction is less than the distance from the lower surface of the pressing plate 14 to the lower surface of the punch 13, and is greater than the sum of the minimum length of the compression spring 15 and the thickness of the pressing plate 14.

[0075] The length of the cutting knife 131 is set so that when the compression spring 15 is not deformed, the cutting knife 131 is located between the pressure plate 14 and the punch 13, protecting the cutting knife 131 from wear; when the compression spring 15 is deformed, the distance between the punch 13 and the pressure plate 14 is reduced, and the cutting knife 131 passes through the guide hole 141 of the pressure plate 14 and the cutting hole 231 of the die 23 to realize the punching and cutting operation.

[0076] Furthermore, after the driving mechanism 4 drives the punch 13 and the die 23 to close the mold (i.e., the pressure plate 14 abuts against the die 23), the free end of the cutting knife 131 can pass through the cutting hole 231 (i.e., the cutting knife 131 passes through the lower surface of the die 23) to the waste collection groove 221 of the lower mold base 22; this design prevents waste from clogging the cutting hole 231.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A punching device for detection, characterized in that: include: An upper die assembly (1) comprises an upper support seat (11), an upper die seat (12), and a punch (13) arranged in sequence from top to bottom, wherein the punch (13) is provided with a plurality of cutting knives (131); A lower die assembly (2) comprises a lower support base (21), a lower die base (22) and a die (23) arranged in sequence from bottom to top; the die (23) is provided with a cutting hole (231) that is concave-convexly matched with the cutting knife (131); the lower die base (22) is provided with a waste collection groove (221); the waste collection groove (221) is arranged directly below the cutting hole (231); and the cutting hole (231) is connected to the waste collection groove (221); The guide mechanism (3) is a plurality of first guide columns (31) arranged between the upper support seat (11) and the lower support seat (21); the distance between the upper mold assembly (1) and the lower mold assembly (2) is adjusted by the guide mechanism (3); A driving mechanism (4) connected to the upper support seat (11) drives the upper die assembly (1) to move in a vertical direction relative to the lower die assembly (2) so that the punch (13) and the die (23) are mated in a concave-convex manner; The cutting holes (231) are cylindrical holes, including overflow glue cutting holes (2311) and / or positioning cutting holes (2312); the overflow glue cutting holes (2311) are provided in a plurality of groups with the same number and equal apertures; the apertures of the plurality of overflow glue cutting holes (2311) in each group gradually decrease from the middle to both sides, and the aperture differences between adjacent overflow glue cutting holes (2311) are the same; the positioning cutting holes (2312) are provided at each vertex of the die (23).

2. The punching device for detection according to claim 1, characterized in that: Limiting grooves (121) are provided on two opposite sides of the upper die base (12), and the notches (1211) of the two limiting grooves (121) are arranged facing each other. The punch (13) is provided between the two limiting grooves (121) and is fixed to the upper die base (12) through the limiting grooves (121); Along the length direction of the limiting slide groove (121), one end of the limiting slide groove (121) is fixedly provided with a supporting member (122), and the other end is detachably provided with a locking pin (5); one side wall (1213) of the punch (13) is against the supporting member (122), and the other side wall (1213) opposite to the punch (13) limits the movement of the punch (13) along the limiting slide groove (121) through the locking pin (5).

3. The punching device for detection according to claim 1, characterized in that: The lower surface of the male mold (13) is provided with a plurality of limiting columns (132), and the upper surface of the female mold (23) is provided with limiting grooves (232) that are concave-convex matched with the limiting columns (132).

4. The punching device for detection according to claim 3, characterized in that: The upper die assembly (1) further comprises a pressing plate (14), wherein the pressing plate (14) is connected to the punch (13) via the limiting column (132) and moves along the limiting column (132); In the vertical direction, the limiting column (132) comprises a first limiting section (1321) and a second limiting section (1322) having a diameter larger than that of the first limiting section (1321); the pressing plate (14) is arranged in the first limiting section (1321) and moves along the first limiting section (1321).

5. The punching device for detection according to claim 4, characterized in that: A compression spring (15) and a second guide column (16) are provided between the pressure plate (14) and the punch (13), and the second guide column (16) is passed through the compression spring (15); one of the pressure plate (14) and the punch (13) is fixedly connected to the second guide column (16), and the other is slidably connected to the second guide column (16).

6. The punching device for detection according to claim 4, characterized in that: The pressing plate (14) is provided with a guide hole (141) for the cutting knife (131) to pass through.

7. The punching device for detection according to claim 5, characterized in that: The length of the cutting knife (131) in the vertical direction is less than the distance from the lower surface of the pressing plate (14) to the lower surface of the punch (13), and is greater than the sum of the minimum length of the compression spring (15) and the thickness of the pressing plate (14).

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