A punch closing device and method of use thereof

Abstract

The application provides a stamping closing structure device and a use method thereof, and belongs to the technical field of stamping assembly. In the stamping closing device, guide columns are fixed at both ends of the middle part of a lower die plate, and ball guide sleeves are fixed at both ends of the middle part of an upper die plate, so as to form a ball die seat and realize free up-and-down movement. A lower punch is fixed on the lower die plate through a lower fixing seat. The lower fixing seat is provided with a V-shaped positioning groove in the horizontal direction, is used for horizontal positioning of a quick-release pin, bears part of the stamping force, and is provided with a stepped hole with a small upper hole and a large lower hole. The center of the small upper hole is coincident with the center of the V-shaped positioning groove. The upper punch is in clearance fit with an upper guide seat at the middle positioning area, and the center stepped hole of the upper punch is inserted into a directional rod from top to bottom. The upper guide seat is fixed on the lower die plate, and a punch is fixed below the upper die plate. The application adjusts a suitable stamping force, so that the quick-release pin ball mounting hole is deformed by a suitable deformation amount, and the normal ejection and retraction of the steel ball are ensured.

Description

Technical Field

[0001] This invention belongs to the field of stamping assembly technology, and particularly relates to a stamping closing device and its usage method. Background Technology

[0002] Quick-release pins are fasteners that enable rapid locking and unlocking. They are mainly used for connecting and securing parts of aircraft that require frequent disassembly and maintenance, such as fairings, passenger seats, and hatches.

[0003] In existing technologies, the quick-release pin is closed by striking the outer end face of the ball bearing mounting hole. This causes plastic deformation of the end face, trapping the ball bearing inside the hole. However, each closure is different. If the pressure is too tight, the ball bearing may have difficulty ejecting or may not eject at all, failing to secure the quick-release pin. If the pressure is too loose, insufficient deformation at the hole can cause the ball bearing to fly out of the mounting hole after a certain number of uses, leading to quick-release pin failure. Furthermore, the quick-release pin ball bearings mounted on the air intake protective mesh may fall off or become stuck, posing a risk of falling into the engine air intake and endangering flight safety. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the quick release pin is difficult to eject or cannot eject due to excessive pressure in the closing method, which makes it impossible to fix the quick release pin. On the other hand, the quick release pin is not fixed because the pressure is too tight, which causes the ball to fall off and the quick release pin to fail. This poses a hidden danger to flight safety.

[0005] The technical solution of this invention is:

[0006] In a first aspect, a stamping closing device is provided, comprising: a lower template 1, an upper template 2, a ball bearing guide sleeve 3, a guide post 4, a lower punch 5, a lower fixed seat 6, an upper punch 7, an upper guide seat 8, a guiding rod 9, and a punch 10.

[0007] Guide pillars 4 are fixed at both ends of the middle part of the lower template 1, and ball bearing guide sleeves 3 are fixed at both ends of the middle part of the upper template 2, forming a ball bearing mold base to achieve free up and down movement;

[0008] The lower punch 5 is fixed on the lower template 1 by the lower fixed seat 6. The lower fixed seat 6 is provided with a V-shaped positioning groove in the horizontal direction for positioning the quick release pin in the horizontal direction and bearing part of the punching force. The center is provided with a stepped hole with a smaller upper hole and a larger lower hole, wherein the center of the smaller upper hole coincides with the center of the V-shaped positioning groove.

[0009] The positioning area in the middle of the upper punch 7 is fitted with the upper guide seat 8 with a clearance, and the guide rod 9 is inserted into the central stepped hole of the upper punch 7 from top to bottom;

[0010] The upper guide seat 8 is fixed on the lower template 1, the punch 10 is fixed below the upper template 2, the guide rod 9 is higher than the upper end face of the upper punch 7, and the center of the punch 10 is provided with a hole larger than the upper cylinder of the guide rod 9. In order to avoid the guide rod 9, the guide rod 9 is removed from the top after forming.

[0011] Optionally, the lower punch 5 consists of an upper forming area, a middle positioning area, and a lower fixed boss. The upper forming area has a conical structure with a cylindrical section at the top. The lower punch 5 has a through-type stepped hole with a smaller top and a larger bottom at the center. The diameter of the upper hole is smaller than the diameter of the quick-release pin ball mounting hole D. The upper hole has an inverted conical working area, and a convex round forming cutting edge with a diameter of d1 is formed at the highest point. d1 is larger than the diameter D of the quick-release pin ball mounting hole. In order to generate sufficient plastic deformation around the quick-release pin ball mounting hole (forming area) to fix the ball and prevent brittle deformation that would cause the forming area to fail, the distance h from the highest point of the d1 convex round forming cutting edge to the center of the quick-release pin is about 0.15mm smaller than the radius R of the quick-release pin. This ensures that the quick-release pin forming area and the highest point of the upper forming area of ​​the lower punch 5 are stressed first during stamping to achieve forming, and also achieves the initial positioning of the V-shaped positioning groove of the lower fixed seat 6.

[0012] Optionally, the upper punch 7 has a structure similar to that obtained by inverting the lower punch 5. The upper punch 7 consists of a lower forming area, a middle positioning area, and an upper fixing boss. The lower forming area has a conical structure with a cylindrical section of about 1 mm at the bottom. The upper punch 7 has a through-type stepped hole with a smaller bottom and a larger top at the center. The diameter of the lower hole is about 0.2 mm smaller than the diameter of the quick release pin ball mounting hole D, which serves as a guide. The lower hole has an inverted conical working area, and the lowest point forms a convex round forming cutting edge with a diameter of d1. The diameter d1 is about 0.5 mm smaller than the quick release pin ball mounting hole D. This ensures that the plastic deformation around the quick release pin ball mounting hole (forming area) is sufficient to fix the ball, without causing brittle deformation that could lead to failure of the forming area.

[0013] Optionally, the guide rod 9 is a stepped shaft with a larger upper part and a smaller lower part. The diameter d2 of its lower cylindrical surface is about 0.18mm smaller than the diameter D of the quick-release pin ball mounting hole. In order to achieve accurate positioning of the upper punch 7, the quick-release pin ball mounting hole, and the lower punch 5, and to prevent the quick-release pin ball mounting hole from being over-formed during stamping and to avoid the ball not being able to pop out, the lowest part has a guide cone surface to facilitate the sequential insertion of the through stepped hole of the upper punch 7, the quick-release pin ball mounting hole, and the through stepped hole of the lower punch 5.

[0014] Optionally, a detachable counterweight 11 is fixed above the upper template 2. The counterweight is adjusted according to the trial molding situation in order to adjust the appropriate impact force according to the stamping effect and ensure reasonable deformation of the forming area.

[0015] Optionally, the guide post 4 has scale lines to determine the upper mold moving height according to the trial molding results. In order to achieve the appropriate impact force according to the stamping effect and ensure reasonable deformation of the forming area;

[0016] Optionally, the device further includes a support rod 12.

[0017] The support rod 12 is fixed on the lower template 1 and corresponds to the position of the cylindrical section of the quick-release pin, and is used to provide auxiliary fixed support for the quick-release pin;

[0018] Optionally, the cylindrical section of the quick-release pin is clamped in the middle using a pressure plate structure, which is fixed to the lower template 1.

[0019] The pressure plate structure consists of a pressure plate 13, a wing nut 14, a screw 15, a spring 16, a washer 17, an adjusting support 18, and a thin nut 19. The lower end of the screw 15 is fixed to the lower template 1. The spring 16 is sleeved on the outside of the screw 15. Above the spring 16, from bottom to top, are arranged the washer 17, the pressure plate 13, and the wing nut 14. The end of the pressure plate 13 closest to the lower fixed seat 6 presses against the quick-release pin, and the end furthest from the lower fixed seat 6 presses against the upper end of the adjusting support 18. The adjusting support 18 is fixed to the lower template 1. The thin nut 19 is located at the lower end of the adjusting support 18 and is used to lock the adjusting support 18 in place.

[0020] Optionally, the upper guide seat 8 has a "Z" shaped structure for easy observation and operation.

[0021] Optionally, the lower punch 5 and the upper punch 7 are made of high-hardness and high-toughness materials such as high-speed wear-resistant steel in order to improve the service life of the device and ensure stable molding.

[0022] Secondly, a method for using a stamping closing device is provided, including:

[0023] 1. Assemble the ball bearing mold base to achieve free opening and closing;

[0024] 2. The lower punch 5 is fixed to the lower template 1 by the lower fixed seat 6;

[0025] 3. Support rod 12, pressure plate 13, wing nut 14, screw 15, spring 16, washer 17, adjusting support 18 and thin nut 19 are installed on the lower template 1 respectively;

[0026] 4. The upper punch 7 and the upper guide seat 8 are fitted with a clearance fit, and the upper guide seat 8 is fixed on the lower template 1;

[0027] 5. Punch 10 is fixed below the upper template 2;

[0028] 6. After assembly, ensure that the center hole of the lower punch 5 is coaxial with the center hole of the upper punch 7;

[0029] 7. Place the quick-release pin horizontally. Insert the guide rod 9 into the center hole of the upper punch 7, the quick-release pin mounting hole and the center hole of the lower punch 5 from top to bottom to achieve initial positioning. Adjust the height of the support rod 12 and press the pressure plate 13.

[0030] 8. Install the required number of counterweights 11 according to the actual situation, lift the upper mold assembly upwards to a suitable height, and mark the guide post 4 with lines;

[0031] 9. The upper mold assembly (including upper template 2, ball guide sleeve 3, punch 10 and counterweight 11) falls down to achieve the stamping forming of the end face of the quick-release pin ball mounting hole;

[0032] 10. The upper mold assembly is lifted upwards and disengaged from the guide post 4, thus achieving separation of the upper mold assembly;

[0033] 11. Loosen the wing nut 14, and pull out the guide rod 9 and the upper punch 7 in sequence to achieve quick release pin demolding;

[0034] 12. Conduct destructive dimensional inspections and quick-release pin insertion / removal tests until the molding quality is stable, and record the number of adjustment weights 11 and the height to which the upper mold assembly rises.

[0035] The beneficial effects of this application are as follows:

[0036] The area around the quick-release pin ball mounting hole is stamped to induce plastic deformation around the hole. By adjusting the appropriate stamping force through a "free fall" method, the quick-release pin ball mounting hole undergoes the appropriate amount of deformation, ensuring that the steel ball can be ejected and retracted normally.

[0037] The stamping closing structure device of this invention has been debugged and solidified with relevant forming parameters, and has passed the destructive dimensional test and quick-release pin insertion and removal test of the ball closing part, thus meeting the design requirements. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the quick-release pin forming process.

[0039] Figure 2 This is a schematic diagram of the device of the present invention;

[0040] Figure 3 This is a schematic cross-sectional view of the device of the present invention along line AA;

[0041] Figure 4 This is a schematic cross-sectional view of the device of the present invention along the BB direction;

[0042] Figure 5 for Figure 3 Enlarged view of a section at point I;

[0043] Figure 6 This is a side view of the lower mold component.

[0044] Among them, 1-lower template; 2-upper template; 3-ball bearing guide sleeve; 4-guide post; 5-lower punch; 6-lower fixed seat; 7-upper punch; 8-upper guide seat; 9-directing rod; 10-punch; 11-counterweight block; 12-support rod; 13-pressure plate; 14-wing nut; 15-screw; 16-spring; 17-washer; 18-adjusting support; 19-thin nut. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0047] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited from each other.

[0048] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0049] This application employs a stamping closing device for quick-release pin ball mounting holes (see [reference]). Figure 1 The outer perimeter is stamped to induce plastic deformation around the hole. By using a "free fall" method, the appropriate stamping force is adjusted to ensure that the quick release pin ball mounting hole undergoes the appropriate amount of deformation, thus ensuring that the steel ball can be ejected and retracted normally.

[0050] See Figure 2An embodiment of the present invention provides a stamping closing device, comprising: a lower template 1; an upper template 2; a ball bearing guide sleeve 3; a guide post 4; a lower punch 5; a lower fixed seat 6; an upper punch 7; an upper guide seat 8; a directional rod 9; a punch 10; a counterweight 11; a support rod 12; a pressure plate 13; a wing nut 14; a screw 15; a spring 16; a washer 17; an adjusting support 18; and a thin nut 19.

[0051] See Figure 3 The lower template 1 has guide pillars 4 fixed at both ends in the middle, and the upper template 2 has ball bearing guide sleeves 3 fixed at both ends in the middle, forming a ball bearing mold base to achieve free up and down movement;

[0052] See Figure 5 The lower punch 5 consists of an upper forming area, a middle positioning area, and a lower fixed boss. The upper forming area has a conical structure with a cylindrical section of about 1 mm at the top. The center of the lower punch 5 has a through-type stepped hole that is smaller at the top and larger at the bottom. The diameter of the upper hole is about 0.2 mm smaller than the diameter of the quick-release pin ball mounting hole D, which serves as a guide. The upper hole has an inverted conical working area, and the highest point forms a convex round forming cutting edge with a diameter of d1. The diameter d1 is about 0.5 mm smaller than the quick-release pin ball mounting hole D. In order to generate sufficient plastic deformation around the quick-release pin ball mounting hole (forming area) to fix the ball, and to prevent brittle deformation that would cause the forming area to fail, the distance h from the highest point of the d1 convex round forming cutting edge to the center of the quick-release pin is about 0.15 mm smaller than the radius R of the quick-release pin. This ensures that the quick-release pin forming area and the highest point of the upper forming area of ​​the lower punch 5 are stressed first during stamping to achieve forming, and also achieves the initial positioning of the V-shaped positioning groove of the lower fixed seat 6.

[0053] The lower punch 5 is fixed to the lower template 1 by the lower fixed seat 6. The lower fixed seat 6 has a V-shaped positioning groove in the horizontal direction for positioning the quick release pin in the horizontal direction and bearing part of the punching force. There is a stepped hole with a smaller upper hole and a larger lower hole in the center, wherein the center of the smaller upper hole coincides with the center of the V-shaped positioning groove.

[0054] The upper punch 7 is similar in structure to the lower punch 5 when inverted. The upper punch 7 consists of a lower forming area, a middle positioning area, and an upper fixing boss. The lower forming area is a conical structure with a cylindrical section of about 1 mm at the bottom. The upper punch 7 has a through-type stepped hole with a smaller bottom and a larger top at the center. The diameter of the lower hole is about 0.2 mm smaller than the diameter of the quick release pin ball mounting hole D, which serves as a guide. The lower hole has an inverted conical working area, and the lowest point forms a convex round forming cutting edge with a diameter of d1. The diameter d1 is about 0.5 mm smaller than the quick release pin ball mounting hole D. This ensures that the plastic deformation around the quick release pin ball mounting hole (forming area) is sufficient to fix the ball and prevent brittle deformation that could cause the forming area to fail.

[0055] The positioning area in the middle of the upper punch 7 is fitted with the upper guide seat 8 with a clearance, and the guide rod 9 is inserted into the central stepped hole of the upper punch 7 from top to bottom;

[0056] The lower punch 5 and the upper punch 7 are made of high-hardness and high-toughness materials such as high-speed wear-resistant steel in order to improve the service life of this device and ensure stable molding.

[0057] The upper guide seat 8 is fixed to the lower template 1. The upper guide seat 8 has a "Z" shaped structure, which facilitates observation and operation.

[0058] The guide rod 9 is a stepped shaft with a larger upper part and a smaller lower part. The diameter d2 of its lower cylindrical surface is about 0.18mm smaller than the diameter D of the quick-release pin ball mounting hole. In order to achieve accurate positioning of the upper punch 7, quick-release pin ball mounting hole and lower punch 5, and to prevent the quick-release pin ball mounting hole from being over-formed during stamping, thus avoiding the ball from not being able to pop out, the lowest part has a guide cone surface to facilitate the sequential insertion of the through stepped hole of the upper punch 7, the quick-release pin ball mounting hole and the through stepped hole of the lower punch 5.

[0059] Punch 10 is fixed below the upper template 2, and the guide rod 9 is higher than the upper end face of the upper punch 7. The center of punch 10 has a hole larger than the upper cylinder of guide rod 9. In order to avoid guide rod 9, guide rod 9 is removed from above after forming.

[0060] A detachable counterweight 11 is fixed above the upper template 2. The counterweight is adjusted according to the trial molding situation. In order to achieve the appropriate impact force according to the stamping effect and ensure reasonable deformation of the forming area;

[0061] The guide post 4 has scale lines. The height of the upper mold is determined according to the trial molding results. In order to achieve the appropriate impact force according to the stamping effect and ensure reasonable deformation of the forming area;

[0062] The support rod 12 is fixed on the lower template 1 and corresponds to the position of the cylindrical section of the quick-release pin, and is used to provide auxiliary fixed support for the quick-release pin;

[0063] See Figure 4 The quick-release pin's cylindrical section is clamped by a pressure plate structure, which is fixed to the lower template 1. The pressure plate structure consists of a pressure plate 13, a wing nut 14, a screw 15, a spring 16, a washer 17, an adjusting support 18, and a thin nut 19. The lower end of the screw 15 is fixed to the lower template 1, and the spring 16 is sleeved on the outside of the screw 15. Above the spring 16, from bottom to top, are the washer 17, the pressure plate 13, and the wing nut 14. The end of the pressure plate 13 closest to the lower fixed seat 6 presses against the quick-release pin, and the end furthest from the lower fixed seat 6 presses against the upper end of the adjusting support 18. The adjusting support 18 is fixed to the lower template 1, and the thin nut 19 is located at the lower end of the adjusting support 18 to lock it in place.

[0064] The assembly and use process of this invention is as follows:

[0065] 1. Assemble the ball bearing mold base to achieve free opening and closing;

[0066] 2. The lower punch 5 is fixed to the lower template 1 by the lower fixed seat 6;

[0067] 3. Support rod 12, pressure plate 13, wing nut 14, screw 15, spring 16, washer 17, adjusting support 18, and thin nut 19 are respectively installed on the lower template 1, see below. Figure 6 ;

[0068] 4. The upper punch 7 and the upper guide seat 8 are fitted with a clearance fit, and the upper guide seat 8 is fixed on the lower template 1;

[0069] 5. Punch 10 is fixed below the upper template 2;

[0070] 6. After assembly, ensure that the center hole of the lower punch 5 is coaxial with the center hole of the upper punch 7;

[0071] The assembly of the device is now complete.

[0072] 7. Place the quick-release pin horizontally. Insert the guide rod 9 into the center hole of the upper punch 7, the quick-release pin mounting hole and the center hole of the lower punch 5 from top to bottom to achieve initial positioning. Adjust the height of the support rod 12 and press the pressure plate 13.

[0073] 8. Install the required number of counterweights 11 according to the actual situation, lift the upper mold assembly upwards to a suitable height, and mark the guide post 4 with lines;

[0074] 9. The upper mold assembly (including upper template 2, ball guide sleeve 3, punch 10 and counterweight 11) falls down to achieve the stamping forming of the end face of the quick-release pin ball mounting hole;

[0075] 10. The upper mold assembly is lifted upwards and disengaged from the guide post 4, thus achieving separation of the upper mold assembly;

[0076] 11. Loosen the wing nut 14, and pull out the guide rod 9 and the upper punch 7 in sequence to achieve quick release pin demolding;

[0077] 12. Conduct destructive dimensional inspections and quick-release pin insertion / removal tests until the molding quality is stable, and record the number of adjustment weights 11 and the height to which the upper mold assembly rises.

[0078] The present invention provides a stamping closing structure device, the relevant forming parameters have been debugged and solidified, and the ball-bearing closing part has passed the destructive dimensional test and quick-release pin insertion and removal test, thus meeting the design requirements.

[0079] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Furthermore, any parts of the present invention not described in detail are conventional techniques.

Claims

1. A stamping closing device, characterized in that, include: Lower template (1), upper template (2), ball bearing guide sleeve (3), guide post (4), lower punch (5), lower fixed seat (6), upper punch (7), upper guide seat (8), directional rod (9), punch (10). The lower template (1) has guide pillars (4) fixed at both ends in the middle, and the upper template (2) has ball guide sleeves (3) fixed at both ends in the middle, forming a ball mold base to achieve free up and down movement; The lower punch (5) is fixed on the lower template (1) by the lower fixed seat (6). The lower fixed seat (6) is provided with a V-shaped positioning groove in the horizontal direction for positioning the quick release pin in the horizontal direction and bearing part of the punching force. The center is provided with a stepped hole with a smaller upper hole and a larger lower hole, wherein the center of the smaller upper hole coincides with the center of the V-shaped positioning groove. The upper punch (7) has a clearance fit with the upper guide seat (8), and the guide rod (9) is inserted into the central stepped hole of the upper punch (7) from top to bottom. The upper guide seat (8) is fixed on the lower template (1), the punch (10) is fixed below the upper template (2), the guide rod (9) is higher than the upper end face of the upper punch (7), the center of the punch (10) is provided with a hole larger than the upper cylinder of the guide rod (9), and the guide rod (9) is removed from the top after forming; a detachable counterweight (11) is fixed on the upper template (2). The lower punch (5) consists of an upper forming area, a middle positioning area and a lower fixed boss; the upper forming area is a conical structure with a cylindrical section at the top. The lower punch (5) has a through-type stepped hole with a smaller top and a larger bottom at the center. The diameter of the upper hole is smaller than the diameter of the quick release pin ball mounting hole D. The upper hole has an inverted conical working area, and a convex round forming cutting edge with a diameter of d1 is formed at the highest point. d1 is larger than the diameter D of the quick release pin ball mounting hole. The distance h from the highest point of the d1 convex round forming cutting edge to the center of the quick release pin is smaller than the radius R of the quick release pin.

2. The apparatus as claimed in claim 1, characterized in that, The device also includes a support rod (12). The support rod (12) is fixed on the lower template (1) and corresponds to the position of the quick-release pin cylindrical section.

3. The apparatus as described in claim 2, characterized in that, The cylindrical section of the quick-release pin is clamped by a pressure plate structure, which is fixed on the lower template (1). The pressure plate structure consists of a pressure plate (13), a wing nut (14), a screw (15), a spring (16), a washer (17), an adjusting support (18), and a thin nut (19). The lower end of the screw (15) is fixed on the lower template (1), and the spring (16) is sleeved on the outside of the screw (15). The washer (17), pressure plate (13), and wing nut (14) are arranged sequentially from bottom to top above the spring (16). The end of the pressure plate (13) near the lower fixed seat (6) presses on the quick release pin, and the end away from the lower fixed seat (6) presses on the upper end of the adjusting support (18). The adjusting support (18) is fixed on the lower template (1), and the thin nut (19) is located at the lower end of the adjusting support (18).

4. The apparatus as claimed in claim 1, characterized in that, The upper punch (7) consists of a lower forming area, a middle positioning area and an upper fixed boss; the lower forming area is a conical structure with a cylindrical section at the bottom. The upper punch (7) has a through-type stepped hole with a smaller bottom and a larger top at the center. The diameter of the lower hole is smaller than the diameter of the quick-release pin ball mounting hole D. The lower hole has an inverted conical working area, and a convex round forming cutting edge with a diameter of d1 is formed at the lowest point. d1 is larger than the quick-release pin ball mounting hole D.

5. The apparatus as claimed in claim 1, characterized in that, The guide rod (9) is a stepped shaft with a larger upper part and a smaller lower part. The diameter d2 of its lower cylindrical surface is smaller than the diameter D of the quick release pin ball mounting hole, and the lowest part is provided with a guide cone surface.

6. The apparatus as claimed in claim 1, characterized in that, The guide post (4) has scale lines.

7. The apparatus as claimed in claim 1, characterized in that, The upper guide seat (8) has a Z-shaped structure.

8. The apparatus as claimed in claim 1, characterized in that, The lower punch (5) and upper punch (7) are made of high-hardness and high-toughness materials.

9. A method of using the stamping closing device according to claim 3, characterized in that, include: Assemble the ball bearing mold base to achieve free opening and closing; The lower punch (5) is fixed to the lower template (1) by the lower fixed seat (6); Install the support rod (12), pressure plate (13), wing nut (14), screw (15), spring (16), washer (17), adjusting support (18) and thin nut (19) on the lower template (1) respectively; The upper punch (7) is fitted with the upper guide seat (8) with a clearance fit, and the upper guide seat (8) is fixed on the lower template (1); Fix the punch (10) below the upper template (2); after assembly, ensure that the center hole of the lower punch (5) is coaxial with the center hole of the upper punch (7); Place the quick-release pin horizontally, and insert the guide rod (9) into the center hole of the upper punch (7), the quick-release pin mounting hole and the center hole of the lower punch (5) from top to bottom to achieve initial positioning. Adjust the height of the support rod (12) and press it with the pressure plate (13). Configure the counterweight (11) to lift the upper mold assembly to a suitable height, and use the guide post (4) to mark the line; the upper mold assembly falls down to realize the stamping of the end face of the quick release pin ball mounting hole; The upper mold assembly is lifted upwards and separated from the guide post (4) to achieve separation of the upper mold assembly; Loosen the wing nut (14), and pull out the guide rod (9) and the upper punch (7) in sequence to achieve quick release pin demolding; Perform destructive dimensional testing and quick-release pin insertion / removal tests until the molding quality is stable, and record the number of adjustment weights (11) and the height to which the upper mold assembly rises.

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