Side face blanking mechanism

Abstract

A slotting tool is fixed at the lower end of an upper die, a product positioning structure can fix a cover-shaped product to be blanked on a lower die, and a lower knife edge insert on the lower die can be inserted into an inner cavity of the cover-shaped product to be blanked and clings to the inner side surface of a part, needing to be punched, of the cover-shaped product to be blanked. A penetrating knife edge matched with the portion, needing to be punched, of the cover-shaped product to be punched is arranged on the lower knife edge inlet block, a punching punch is fixed to a punching sliding block which can be installed on the lower die in a sliding mode in the horizontal direction, and the punching punch slides along with the punching sliding block and can be matched with the penetrating knife edge on the lower knife edge inlet block to conduct punching on the side wall of the cover-shaped product to be punched. The first elastic piece installed on the lower die provides elastic reset force in the direction away from the cover-shaped product to be blanked for the punching sliding block, and the slotting tool can force the punching sliding block to overcome the elastic force of the first elastic piece to slide in the direction of the cover-shaped product to be blanked through the inclined face along with descending of the upper die. The cover-shaped product side wall punching device guarantees the stability and the precision of cover-shaped product side wall punching.

Description

Technical Field

[0001] The utility model relates to a hardware forming die, in particular to a side punching mechanism. Background Art

[0002] For a cover-shaped product 10 having a perforation 101 on the outer circumferential wall, when produced using a metal stamping process, the current production process is to first load and unload a stamping die to form a circular sheet 102, punch holes in the circular sheet, and then form a cover-shaped structure through a stretching process. This process of punching first and then stretching causes the punching holes to deform during the stretching process as the material stretches and deforms, which in turn causes the perforations on the circumferential side wall of the cover-shaped product to have low dimensional accuracy due to deformation. During subsequent assembly and use, the deformation of the holes often makes it impossible to assemble smoothly. Utility Model Content

[0003] In order to overcome the above defects, the utility model provides a side punching mechanism, which realizes that the cover-shaped product to be punched on the side wall is first stretched and then punched, thereby ensuring the dimensional accuracy of the holes on the side wall of the cover-shaped product.

[0004] The utility model adopts the following technical solutions to solve its technical problems: a side punching mechanism, comprising an upper die and a lower die, the upper die being able to move vertically up and down and being arranged just above the lower die, a knife being fixedly provided at the lower end of the upper die, and a product positioning structure being provided, the product positioning structure being able to fix and position the cover-shaped product to be punched on the lower die, a lower blade entry block being fixedly provided on the lower die, the lower blade entry block being able to be inserted into the inner cavity of the cover-shaped product to be punched and being in close contact with the inner surface of the part to be punched of the cover-shaped product to be punched, the lower blade entry block being provided with a through-knife matching the part to be punched of the cover-shaped product to be punched The lower die is provided with a punching slider which can slide in the horizontal direction, and a punching punch is fixedly mounted on the punching slider. The punching punch can cooperate with the through-blade on the lower blade block to punch a hole on the side wall of the cover-shaped product to be punched as the punching slider slides. The lower die is also provided with a first elastic member, which provides an elastic reset force to the punching slider in the direction away from the cover-shaped product to be punched. The side wall of the lower end of the inserting knife can contact the side wall of the punching slider through an inclined surface, and the inserting knife will be able to force the punching slider to overcome the elastic force of the first elastic member and slide toward the cover-shaped product to be punched as the upper die moves down.

[0005] As a further improvement of the present invention, the product positioning structure includes a lower die fixed block that matches the inner cavity shape of the cover-shaped product to be punched, and the cover-shaped product to be punched can be sleeved on the outer side of the upper end of the lower die fixed block. A blade avoidance groove is formed on the lower die fixed block, and the lower blade block is fixedly inserted in the blade avoidance groove. It also includes a stripping plate installed on the upper die that can elastically slide a set distance in the up and down directions, and the stripping plate can elastically press the bottom surface of the upper end of the cover-shaped product to be punched.

[0006] As a further improvement of the present invention, a blanking channel running vertically through the lower blade entry block is provided, the upper end of the blanking channel is connected with the through blade, and a discharge port is provided on the lower die which is connected with the lower end of the cover blanking channel. The waste material on the side wall of the cover-shaped product to be punched out by the punch and the through blade can be discharged to the outside of the lower die through the blanking channel and the discharge port.

[0007] As a further improvement of the present invention, a blowing device is fixedly mounted on the lower die fixed entry block, and the blowing device can blow air from top to bottom toward the upper end of the blanking channel of the lower blade entry block.

[0008] As a further improvement of the present invention, a lateral pressing slider and a second elastic member are further provided on the lower die. The lateral pressing slider can be installed on the punching slider in a horizontal direction. The second elastic member provides the lateral pressing slider with an elastic retaining force toward the direction of the cover-shaped product to be punched. The lateral pressing slider slides horizontally toward the cover-shaped product to be punched along with the punching slider and can press the outer surface of the part to be punched of the cover-shaped product to be punched before the punching punch.

[0009] As a further improvement of the present invention, the side wall of the lateral pressing slider close to the direction of the cover-shaped product to be punched is a concave arc surface that matches the circumferential outer surface of the cover-shaped product to be punched.

[0010] As a further improvement of the present invention, a punch avoidance hole for the punching punch to slide through is provided on the lateral pressing slider.

[0011] As a further improvement of the present invention, a T-shaped opening groove is provided on the side wall of the punching slider facing the direction of the cover-shaped product to be punched, and a T-shaped connecting block is provided on the side wall of the lateral pressing slider facing away from the direction of the cover-shaped product to be punched. The T-shaped connecting block can be slid a set distance and inserted into the T-shaped opening groove on the punching slider, and two second elastic members are respectively provided on both sides of the T-shaped connecting block, and the two second elastic members are tightly clamped between the punching slider and the lateral pressing slider.

[0012] As a further improvement of the present invention, the side wall of the punching slider away from the cover-shaped product to be punched is provided with a first inclined surface, a first vertical surface, a second inclined surface and a second vertical surface from top to bottom, and the side wall of the lower end of the inserting knife is provided with a third inclined surface, a third vertical surface, a fourth inclined surface and a fourth vertical surface from bottom to top. The two-level inclined surfaces formed by the third inclined surface and the fourth inclined surface at the lower end of the inserting knife can respectively contact the two-level inclined surfaces formed by the second inclined surface and the first inclined surface on the side wall of the punching slider.

[0013] As a further improvement of the present invention, the punching slider is provided with a punch positioning through-hole and a punch positioning hole perpendicular to the punch positioning through-hole. The circumferential stop of one end of the punching punch is inserted into the punch positioning hole. A positioning notch opposite to the punch positioning through-hole is also provided on the side wall of one end of the punching punch. A positioning pin is inserted into the punch positioning through-hole of the punching slider. The positioning pin is inserted into the positioning notch on the side wall of one end of the punching punch to realize axial stop positioning of the punching punch.

[0014] The beneficial effects of the present invention are as follows: the present invention fixes and positions the cover-shaped product to be punched on the side wall on the lower die through the product positioning structure; when the upper die is lowered to close the die, the inserting knife on the upper die contacts the side wall of the punching slide block on the lower die through the inclined surface, forcing the punching slide block to slide horizontally, thereby realizing the horizontal movement of the punching punch toward the cover-shaped product to be punched, and cooperating with the knife edge on the knife edge insert to punch out the material on the side wall of the cover-shaped product to form a perforation, thereby realizing accurate punching of the side wall of the already formed cover-shaped product, and realizing the stretching forming of the cover product first, and then the side The wall punching forming process of the utility model makes the perforation size accuracy of the circumferential side wall of the cover-shaped product high and without deformation. The inserting knife of the utility model also adopts a double-insertion structure with two-level inclined surfaces to ensure the stability of the punching forming. The new structure also adopts a double-slider structure. The lateral pressing slider first presses the outer circumferential wall of the cover-shaped product, and the punching slider pushes the punch to continue forward to ensure the stability and accuracy of the punching. The new structure is also provided with a blowing device to blow air obliquely downward on the discharge channel to facilitate the waste material to be blown out of the mold, prevent blockage, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the front view of the cover-shaped product;

[0016] Figure 2 A top view of a lid-shaped product;

[0017] Figure 3 A bottom view of a lid-shaped product;

[0018] Figure 4 This is a schematic diagram of the forming principle of a cap-shaped product using traditional technology;

[0019] Figure 5 This is a schematic diagram of the forming principle of the utility model for a cap-shaped product;

[0020] Figure 6 This is the main view of the structural principle of the utility model;

[0021] Figure 7 It is a top view of the utility model;

[0022] Figure 8 This is the main view of the utility model in the mold opening state;

[0023] Figure 9 This is a top view of the utility model in the mold opening state;

[0024] Figure 10 This is a front view of the punching punch of the utility model when it just contacts the side wall of the product;

[0025] Figure 11 This is a top view of the punching punch of the present invention when it just contacts the side wall of the product;

[0026] Figure 12 This is the main view of the utility model in the closed mold state;

[0027] Figure 13 It is a top view of the utility model in a closed mold state;

[0028] Figure 14 This is the front view of the punch slider of the utility model;

[0029] Figure 15 This is a top view of the punch slider of the utility model;

[0030] Figure 16 This is the front view of the lower blade entering the block of the utility model;

[0031] Figure 17 This is a top view of the lower blade entering the block of the utility model;

[0032] Figure 18 for Figure 17 Middle AA section view;

[0033] Figure 19 This is the front view of the punching slider of the utility model;

[0034] Figure 20 This is a top view of the punching slider of the present utility model;

[0035] Figure 21 This is a right view of the punching slider of the utility model;

[0036] Figure 22 This is the front view of the punching slider of the utility model;

[0037] Figure 23 This is a top view of the punching slider of the present utility model;

[0038] Figure 24 This is a right view of the punching slider of the utility model;

[0039] Figure 25 This is the front view of the punching punch of the utility model;

[0040] Figure 26 This is a top view of the punching punch of the utility model;

[0041] Figure 27 This is a right side view of the punching punch of the present utility model;

[0042] Figure 28 It is the front view of the inserting knife of the present utility model. DETAILED DESCRIPTION

[0043] Embodiment: A side punching mechanism comprises an upper die and a lower die, the upper die being capable of vertically lifting and lowering movement and being arranged directly above the lower die, a knife 8 being fixedly provided at the lower end of the upper die, and a product positioning structure being provided, which can fix and position the cover-shaped product 10 to be punched on the lower die, a lower blade entry block 9 being fixedly provided on the lower die, the lower blade entry block 9 being capable of being inserted into the inner cavity of the cover-shaped product 10 to be punched and being closely attached to the inner surface of the portion to be punched of the cover-shaped product 10 to be punched, a through blade 11 being provided on the lower blade entry block 9 which matches the portion to be punched of the cover-shaped product 10 to be punched, and a punching mechanism being capable of sliding horizontally on the lower die. A hole slider 12 is provided, on which a punching punch 13 is fixedly mounted. The punching punch 13 slides with the punching slider 12 and can cooperate with the through-blade 11 on the lower blade entry block 9 to punch a hole on the side wall of the cover-shaped product 10 to be punched. A first elastic member 14 is also installed on the lower die. The first elastic member 14 provides an elastic reset force to the punching slider 12 in the direction away from the cover-shaped product 10 to be punched. The lower end side wall of the insert knife 8 can contact the side wall of the punching slider 12 through an inclined surface. The insert knife 8 will be able to force the punching slider 12 to overcome the elastic force of the first elastic member 14 and slide toward the cover-shaped product 10 to be punched as the upper die moves down.

[0044] The upper die includes an upper pad 1, an upper clamping plate 2, a solid depth plate 3 and a stripping plate 4 arranged from top to bottom, and the lower die includes a lower base plate 5, a lower pad 6 and a lower template 7 arranged from bottom to top. The upper end of the inserting knife 8 passes through the stripping plate, the solid depth plate and the upper clamping plate and is fixedly connected to the upper pad. The lower end of the inserting knife 8 extends a certain length from the lower end of the stripping plate. When the die is closed, the inserting knife 8 is moved down together with the upper die. The inclined surface on the side wall of the lower end of the inserting knife 8 gradually contacts the inclined surface on the side wall of the punching slider 12 on the lower die, forcing the punching slider 12 to gradually slide horizontally, driving the punching punch 13 to horizontally punch the side wall of the cover-shaped product 10 fixed on the lower die by the product positioning structure. Finally, the punching punch 13 and the through-blade are aligned. 11 cooperates to punch down the material on the side wall of the cover-like product 10, and the waste material 18 falls through the through-blade 11, forming a precise perforation on the side wall of the cover-like product 10. Then, as the upper mold opens, the inserting knife 8 is lifted, and under the action of the first elastic member 14, the punching slider 12 brings the punching punch 13 back to its original position, and the cover-like product 10 can be removed from the product positioning structure. As many perforations as need to be formed on the side wall of the cover-like product 10, it is only necessary to set a plurality of inserting knives 8 and punching sliders 12 accordingly. Since the side wall of the cover-like product 10 does not need to be stretched after the punching is completed, the perforation will not be deformed, the dimensional accuracy is high, and it is convenient for subsequent assembly and use.

[0045] The product positioning structure includes a lower die fixed block 15 that matches the inner cavity shape of the cover-shaped product 10 to be punched. The cover-shaped product 10 to be punched can be sleeved on the outer side of the upper end of the lower die fixed block 15. A blade avoidance groove 16 is formed on the lower die fixed block 15. The lower blade block 9 is fixedly inserted in the blade avoidance groove 16 and also includes a stripping plate installed on the upper die that can elastically slide a set distance in the up and down directions. The stripping plate can elastically press the bottom surface of the upper end of the cover-shaped product 10 to be punched.

[0046] The stretched lid-shaped product 10 is placed on the lower mold fixed block 15 with its opening facing inwards. The lower mold fixed block 15 supports and positions the lid-shaped product 10. When the mold is closed, the upper bottom surface of the lid-shaped product 10 is pressed by the stripping plate that moves elastically up and down. The lower blade block 9 is inserted into the blade avoidance groove 16 on the lower mold fixed block 15. The lower blade block 9 and the lower mold fixed block 15 pass through the upper mold plate and are fixedly connected to the lower pad. The lower edge of the lid-shaped product 10 is just supported on the upper side surface of the lower mold plate. When the side wall of the product 10 is punched, the cover-shaped product 10 maintains a stable positioning state, and its inner side also has stable support. During punching, the side wall of the cover-shaped product 10 will not be deformed, ensuring the punching accuracy. In addition to the above structure supporting and positioning the cover-shaped product 10, an annular groove can also be provided on the lower template for inserting the cover-shaped product 10, and the upper end of the cover-shaped product 10 can be pressed by the upper mold. These are equivalent design schemes that can be easily thought of by those skilled in the art based on this patent and fall within the scope of protection of this patent.

[0047] A vertically penetrating blanking channel 17 is provided in the lower blade entry block 9, and the upper end of the blanking channel 17 is connected to the penetrating blade 11. The lower die is provided with a discharge port connected to the lower end of the cover blanking channel 17. The waste 18 punched out by the punching punch 13 and the penetrating blade 11 on the side wall of the cover-shaped product 10 to be punched can be discharged to the outside of the lower die through the blanking channel 17 and the discharge port.

[0048] The flushed waste 18 enters the upper end of the discharge channel 17 through the through-blade 11 of the lower blade entry block 9, and then falls along the discharge channel 17 under the action of gravity, and finally falls out of the outside of the mold. The discharge channel 17 can form an L-shaped structure, and its upper end is connected with the through-blade 11 through a horizontal extension section. The lower side surface of the horizontal section at the upper end of the discharge channel 17 is preferably extended at an angle, so that the horizontal section at the upper end of the discharge channel 17 forms a trumpet-shaped structure, and the lower side surface of the horizontal section of the discharge channel 17 and the vertical end side wall of the lower end of the discharge channel 17 are connected through a circular arc surface transition, which can facilitate the smooth discharge of the waste 18.

[0049] The lower die fixed block 15 is also fixedly mounted with an air blowing device 19, which can blow air from top to bottom toward the upper end of the material discharge channel 17 of the lower blade entry block 9. The air blowing device 19 blows air obliquely downward at the upper end of the material discharge channel 17 to prevent the waste material 18 from getting stuck in the material discharge channel 17 and causing blockage.

[0050] The lower die is also provided with a lateral pressing slider 20 and a second elastic member 21. The lateral pressing slider 20 can be installed on the punching slider 12 in a horizontal sliding direction. The second elastic member 21 provides the lateral pressing slider 20 with an elastic retaining force toward the direction of the cover-shaped product 10 to be punched. The lateral pressing slider 20 slides horizontally toward the cover-shaped product 10 to be punched along the punching slider 12, and can press the outer surface of the part to be punched of the cover-shaped product 10 to be punched before the punching punch 13.

[0051] When the punching slider 12 slides toward the cover-like product 10, the lateral pressing slider 20 slides synchronously and contacts the side wall of the cover-like product 10 before the punching punch 13 contacts the side wall of the cover-like product 10, pressing the side wall of the cover-like product 10, and then punching is performed to ensure that the side wall of the cover-like product 10 is firmly positioned during punching and the punching accuracy is ensured.

[0052] The side wall of the lateral pressing slider 20 close to the cover-shaped product 10 to be punched is a concave arc surface that matches the circumferential outer surface of the cover-shaped product 10 to be punched.

[0053] The lateral pressing slide block 20 is provided with a punch avoidance hole 22 for the punching punch 13 to slide through. The avoidance hole cross section is preferably consistent with the punching punch 13, and plays a supporting and guiding role for the punching punch 13.

[0054] The side wall of the punching slide 12 facing the cover-shaped product 10 to be punched is provided with a T-shaped opening groove 23, and the side wall of the side pressing slide 20 facing away from the cover-shaped product 10 to be punched is provided with a T-shaped connecting block 24. The T-shaped connecting block 24 can be inserted into the T-shaped opening groove 23 on the punching slide 12 by sliding a set distance. Two second elastic members 21 are respectively provided on both sides of the T-shaped connecting block 24. The two second elastic members 21 are tightly clamped between the punching slide 12 and the side pressing slide 20. The side pressing slide 20 slides a distance in the T-shaped opening groove 23 of the punching slide 12 through the T-shaped connecting block 24, thereby realizing the connection between the side pressing slide 20 and the punching slide 12 that can slide relative to each other by a set distance.

[0055] The side wall of the punching slide 12, facing away from the lid-shaped product 10 to be punched, is provided with a first inclined surface 25, a first vertical surface 26, a second inclined surface 27, and a second vertical surface 28 from top to bottom. The side wall of the lower end of the plunger 8 is provided with a third inclined surface 29, a third vertical surface 30, a fourth inclined surface 31, and a fourth vertical surface 32 from bottom to top. The two-stage inclined surface formed by the third inclined surface 29 and the fourth inclined surface 31 at the lower end of the plunger 8 can respectively contact the two-stage inclined surface formed by the second inclined surface 27 and the first inclined surface 25 on the side wall of the punching slide 12. This structure realizes the two-stage inclined drive of the plunger 8 and the side wall of the punching slide 12, providing stable driving and ensuring accurate punching position.

[0056] The punching slider 12 is provided with a punch positioning through-hole 33 and a punch positioning hole 34 perpendicular to the punch positioning through-hole 33. The punching punch 13 is inserted into the punch positioning hole 34 for circumferential stop at one end. The side wall of one end of the punching punch 13 is also provided with a positioning notch 35 facing the punch positioning through-hole 33. A positioning pin 36 is inserted into the punch positioning through-hole 33 of the punching slider 12. The positioning pin 36 is inserted into the positioning notch 35 on the side wall of one end of the punching punch 13 to realize axial stop positioning of the punching punch 13.

[0057] The above structure facilitates the installation and positioning of the punching punch 13 on the punching slider 12. The punching slider 12 is also provided with a first spring groove 37 for positioning the first elastic member 14 and a second spring groove 38 for positioning the second elastic member 21, which are used to position the first elastic member 14 and the second elastic member 21.

Claims

1. A side punching mechanism, comprising an upper die and a lower die, wherein the upper die is vertically movable and is disposed directly above the lower die, and is characterized in that: The lower end of the upper die is fixedly provided with an inserting knife (8), and is also provided with a product positioning structure. The product positioning structure can fix and position the cover-shaped product to be punched on the lower die. The lower die is also fixedly provided with a lower blade entry block (9). The lower blade entry block can be inserted into the inner cavity of the cover-shaped product to be punched (10) and is close to the inner surface of the part to be punched of the cover-shaped product to be punched. The lower blade entry block is provided with a through blade (11) that matches the part to be punched of the cover-shaped product to be punched. The lower die is also provided with a punching slider (12) that can slide in the horizontal direction. A punching punch (13) is fixedly mounted on the punching slide. The punching punch can cooperate with the through-cutting edge on the lower blade insert block to punch a hole on the side wall of the cover-shaped product to be punched as the punching slide slides. A first elastic member (14) is also mounted on the lower die. The first elastic member provides the punching slide with an elastic reset force in a direction away from the cover-shaped product to be punched. The lower end side wall of the insert can contact the side wall of the punching slide through an inclined surface. The insert can force the punching slide to overcome the elastic force of the first elastic member and slide in the direction of the cover-shaped product to be punched as the upper die moves downward.

2. The side punching mechanism according to claim 1, characterized in that: The product positioning structure includes a lower die fixed block (15) that matches the inner cavity shape of the cover-shaped product to be punched, the cover-shaped product to be punched can be sleeved on the outer side of the upper end of the lower die fixed block, a knife edge avoidance groove (16) is formed on the lower die fixed block, the lower knife edge block is fixedly inserted in the knife edge avoidance groove, and also includes a stripping plate installed on the upper die that can elastically slide a set distance in the up and down directions, and the stripping plate can elastically press the bottom surface of the upper end of the cover-shaped product to be punched.

3. The side punching mechanism according to claim 2, characterized in that: A vertically penetrating blanking channel (17) is provided in the lower blade entry block, the upper end of the blanking channel is communicated with the penetrating blade, and a discharge port is provided on the lower die that is communicated with the lower end of the cover blanking channel. Waste materials (18) punched out by the punch and the penetrating blade on the side wall of the cover-shaped product to be punched can be discharged to the outside of the lower die through the blanking channel and the discharge port.

4. The side punching mechanism according to claim 3, characterized in that: The lower die fixed block is also fixedly provided with a blowing device (19), which can blow air from top to bottom toward the upper end of the blanking channel of the lower blade block.

5. The side punching mechanism according to claim 1, characterized in that: The lower die is also provided with a lateral pressing slider (20) and a second elastic member (21). The lateral pressing slider can be mounted on the punching slider in a horizontal sliding manner. The second elastic member provides the lateral pressing slider with an elastic retaining force in the direction of the cover-shaped product to be punched. The lateral pressing slider slides horizontally with the punching slider in the direction of the cover-shaped product to be punched and can press the outer surface of the part to be punched of the cover-shaped product to be punched before the punching punch.

6. The side punching mechanism according to claim 5, characterized in that: The side wall of the lateral pressing sliding block close to the direction of the cover-shaped product to be punched is a concave arc surface that matches the circumferential outer surface of the cover-shaped product to be punched.

7. The side punching mechanism according to claim 5, characterized in that: The lateral material pressing slide block is provided with a punch avoidance hole (22) for the punching punch to slide through.

8. The side punching mechanism according to claim 5, characterized in that: A T-shaped opening groove (23) is provided on the side wall of the punching slider facing the direction of the cover-shaped product to be punched, and a T-shaped connecting block (24) is provided on the side wall of the lateral pressing slider facing away from the direction of the cover-shaped product to be punched. The T-shaped connecting block can be inserted into the T-shaped opening groove on the punching slider by sliding a set distance, and two second elastic members are respectively provided on both sides of the T-shaped connecting block, and the two second elastic members are tightly clamped between the punching slider and the lateral pressing slider.

9. The side punching mechanism according to claim 1, characterized in that: A first inclined surface (25), a first vertical surface (26), a second inclined surface (27) and a second vertical surface (28) are provided on the side wall of the punching slide away from the direction of the cover-shaped product to be punched from top to bottom, and a third inclined surface (29), a third vertical surface (30), a fourth inclined surface (31) and a fourth vertical surface (32) are provided on the side wall of the lower end of the inserting knife from bottom to top. The two-stage inclined surface formed by the third inclined surface and the fourth inclined surface at the lower end of the inserting knife can respectively contact the two-stage inclined surface formed by the second inclined surface and the first inclined surface on the side wall of the punching slide.

10. The side punching mechanism according to claim 1, characterized in that: The punching slider is provided with a punch positioning through-hole (33) and a punch positioning hole (34) perpendicularly intersecting the punch positioning through-hole. The punching punch is inserted into the punch positioning hole for circumferential stop at one end. A positioning notch (35) facing the punch positioning through-hole is also provided on the side wall at one end of the punching punch. A positioning pin (36) is inserted into the punch positioning through-hole of the punching slider. The positioning pin is inserted into the positioning notch on the side wall at one end of the punching punch to realize axial stop positioning of the punching punch.

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