Gasket stamping die
By using the combination of a half-shear punch, a half-shear die and a nitrogen spring in the gasket stamping mold, the problem of deformation and curling of the gasket edge during the stamping process is solved, and the flatness and force uniformity of the gasket are achieved.
Patent Information
- Application Number
- CN202420974616.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing gasket stamping molds are prone to deform the edge of the gasket and curl during the stamping process.
A gasket stamping die is designed, which adopts the combination of a half-shear punch and a half-shear die, combined with the support and extrusion of the nitrogen spring to disperse stress and reduce the curling phenomenon.
Through the cooperation of the half-shear punch, half-shear die and nitrogen spring, the flatness of the gasket is ensured, the possibility of curling edges is reduced, and the force under the gasket is more uniform and stable.
Smart Images
Figure CN222625914U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to gasket processing equipment, in particular to a gasket stamping die. Background Art
[0002] The existing gasket stamping die includes a punch and a die. After punching the center hole, the punch presses the material strip into the die, so that the product is sheared out of the material strip into the desired shape, thereby obtaining a finished gasket. Due to the shape of the punch and the concentrated punching force, the edge area of the gasket will be subjected to greater stress. These stress-concentrated areas are more likely to deform, which can easily cause the gasket to curl. Utility Model Content
[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a gasket stamping die, which solves the problem that the gasket in the prior art is prone to curling during the stamping process.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] Provided is a gasket stamping die, which comprises an upper die seat, a lower die seat and a feeding mechanism for conveying a material strip to be stamped, wherein the upper die seat is connected to a power mechanism; a punching punch for punching a center hole, a half-shearing punch for shearing a gasket shape and a blanking punch for separating the gasket from the material strip are sequentially arranged on the upper die seat;
[0006] The lower die seat is provided with a punching die, a half-shearing die and a blanking die which cooperate with the punching punch, the half-shearing punch and the blanking punch respectively; a cylindrical inner stripping block is provided at the center of the half-shearing die, and the bottom of the inner stripping block is connected to the nitrogen spring through a push rod.
[0007] The beneficial effects of the utility model are as follows: the solution ensures the flatness of the gasket through the cooperation of the half-shear punch and the half-shear die and the supporting and extruding effect of the nitrogen spring on the gasket. The cooperation of the half-shear punch and the half-shear die can leave a certain connection part between the material strip and the gasket to disperse the stress and reduce the curling phenomenon. The elasticity of the nitrogen spring can disperse the impact force applied by the half-shear punch on the gasket to avoid excessive local stress, and the nitrogen spring can provide additional and stable support and pressure to the workpiece, which can make the gasket more evenly and stably stressed and reduce the possibility of curling.
[0008] Furthermore, a working plate is fixed on the upper surface of the lower die seat, and the punching die, the half-shearing die and the blanking die are all arranged on the working plate;
[0009] The bottom of the half-shearing die is provided with a through hole for the ejector rod to pass through, and the lower die seat is provided with a through hole for the nitrogen spring to pass through; the diameter of the inner stripping block is greater than the diameter of the through hole of the half-shearing die.
[0010] The beneficial effect of the above technical solution is that when the upper die seat is pressed down, the half-shear punch punches part of the material strip, and the impact of the half-shear punch causes the nitrogen spring to move down until the inner stripping block contacts the bottom surface of the half-shear die. After the impact is removed, the nitrogen spring will rise, so that the gasket part of the material strip is ejected and restored to its original height. This allows the material strip to continue to move to the next step and avoid material jamming.
[0011] Furthermore, the lower die base is evenly provided with a number of floating pins along the length direction, and the floating pins are symmetrically arranged at both ends of the lower die base along the center line of the length direction of the lower die base; an annular groove is opened on the outer surface of the floating pin, and both ends of the width direction of the material strip extend into the annular groove; the bottom of the floating pin extends into the groove of the lower die base, and the floating pin is movably connected to the groove of the lower die base through an elastic component.
[0012] The above technical solution has the following beneficial effects: the annular groove of the floating material pin is used to limit the position of the material strip, so that the material strip can move forward in a straight line, avoiding the material strip from deviating relative to the lower die seat, resulting in stamping failure and thus material waste. During the pressing process, the upper die seat can drive the floating material pin to move downward, so that the material strip moves downward and contacts the concave die of the lower die seat.
[0013] Furthermore, a fine punch is provided between the punching punch and the half-shear punch to improve the surface quality of the hole. The rough punching + fine punching process is adopted. The first step of rough punching quickly removes most of the material to reduce the impact force and wear during fine punching, thereby improving the surface quality and precision of the final workpiece.
[0014] Furthermore, a cylindrical top block is fixedly connected to the center of the blanking die, and the curved surface of the top block does not contact the side wall of the blanking die; a pushing mechanism for pushing the gasket is provided on one side of the blanking die, and a receiving device is provided on the other side. This facilitates the blade of the blanking punch to extend into the gap between the top block and the blanking die, thereby cutting the gasket. When the upper die seat floats upward, the pushing mechanism pushes the cut gasket into the receiving device.
[0015] Furthermore, a marking punch for marking the non-forming area of the material strip is provided at the front end of the upper die seat, and a guide needle is provided at the rear end of the punching punch; the marking punch and the guide needle are located on the same straight line along the running direction of the material strip. The marking punch can make special marks such as grooves, holes, and protrusions on the material strip, and the guide needle is used to detect whether the material strip has reached the specified position to prevent misfeeding.
[0016] Furthermore, a shearing knife is provided at the end of the upper die seat.
[0017] Furthermore, the lower surface of the upper die seat is fixedly connected with an upper pad and a clamping plate in sequence, and the punching punch, the half shearing punch and the blanking punch are all fixedly connected to the clamping plate; the stripping plate is movably connected to the upper pad through a spring assembly, and the punching punch, the half shearing punch and the blanking punch all extend out of the stripping plate and are movably connected to the stripping plate. When pressed down, the stripping plate can press the material strip to ensure that the material strip and the product have good flatness. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Schematic diagram of the gasket stamping die.
[0019] Among them, 1. Upper die base; 2. Lower die base; 3. Upper pad; 4. Clamp; 5. Stripper plate; 6. Marking punch; 7. Punching punch; 8. Guide needle; 9. Fine blanking punch; 10. Half shear punch; 11. Inner stripper block; 12. Half shear die; 13. Blanking die; 14. Floating pin; 15. Ejector block; 16. Blanking punch; 17. Shear knife; 18. Ejector rod; 20. Nitrogen spring; 21. Material strip; 22. Working plate. DETAILED DESCRIPTION
[0020] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.
[0021] like Figure 1 As shown, the gasket stamping die of the present scheme comprises an upper die base 1, a lower die base 2 and a feeding mechanism, the upper die base 1 is connected to the power mechanism, and the feeding mechanism is connected to the material belt 21; the upper die base 1 is provided with a punching punch 7 for punching a center hole, a half-shear punch 10 for shearing the shape of the gasket, and a blanking punch 16 for separating the gasket from the material belt 21 in sequence;
[0022] The lower die base 2 is provided with a punching die, a half-shear die 12 and a blanking die 13 respectively cooperating with the punch 7, the half-shear punch 10 and the blanking punch 16. The half-shear process can leave a certain connection part between the material strip 21 and the gasket to disperse the stress and reduce the curling phenomenon.
[0023] Since curling is mainly caused by edge stress concentration, the method to ensure flatness is mainly to reduce stress concentration as much as possible and disperse stress evenly. After punching, the half-shear punch 10 presses the material strip 21 into the half-shear die 12 to shear out the shape of the gasket, but does not completely cut off the material strip 21, but leaves a thinner connection between the material strip 21 and the gasket. The connection part can disperse stress, reduce the possibility of stress concentration, and can play a supporting role in the connection, which can reduce the phenomenon of curling. In the next step, through the cooperation of the blanking punch 16 and the blanking die 13, only a small impact force is needed to make the gasket fall off. Since the impact force is small, the gasket will not curl, so the risk of gasket curling can be reduced.
[0024] A cylindrical inner stripping block 11 is arranged at the center of the half-shear die 12, and the bottom of the inner stripping block 11 is connected to the nitrogen spring 20 through the ejector rod 18. The elasticity of the nitrogen spring 20 can disperse the impact force applied by the half-shear punch 10 on the gasket to avoid excessive local stress, and the nitrogen spring 20 can provide additional and stable support and pressure to the workpiece, so that the gasket can be more evenly and stably stressed and the possibility of curling can be reduced.
[0025] In more detail, during this process, the nitrogen spring 20 exerts a lifting effect on the gasket, and can form a uniform support surface at the bottom of the gasket, thereby dispersing the pressure during the stamping process and reducing the stress concentration at the edge, thereby effectively reducing the deformation of the gasket edge and improving the flatness of the gasket. The nitrogen spring 20 can also increase the time the gasket is subjected to force, that is, the gasket moves downward for a period of time before being cut. The momentum of the stamping process system is conserved. According to the relationship between momentum and force, increasing the force time can reduce the force while keeping the momentum unchanged.
[0026] A cylindrical top block 15 is fixedly connected to the center of the blanking die 13, and the curved surface of the top block 15 does not contact the side wall of the blanking die 13; a pushing mechanism for pushing the gasket is provided on one side of the blanking die 13, and a receiving device is provided on the other side. It is convenient for the blade of the blanking punch 16 to extend into the gap between the top block 15 and the blanking die 13, thereby cutting the gasket. When the upper die seat floats upward, the pushing mechanism pushes the cut gasket into the receiving device.
[0027] Specifically, a working plate 22 is fixed to the upper surface of the lower die base 2, and the punching die, the half-shear die 12 and the blanking die 13 are all opened on the working plate 22; the bottom of the half-shear die 12 is provided with a through hole for the push rod 18 to pass through, and the lower die base 2 is provided with a through hole for the nitrogen spring 20 to pass through; the diameter of the inner stripping block 11 is larger than the diameter of the through hole of the half-shear die 12.
[0028] When the upper die seat 1 is pressed down, the half-shear punch 10 punches part of the material strip 21, and the impact of the half-shear punch 10 causes the nitrogen spring 20 to move down until the inner stripping block 11 contacts the bottom surface of the half-shear die 12. After the impact is removed, the nitrogen spring 20 will rise, so that the gasket part of the material strip 21 is ejected and restored to its original height, so that the material strip 21 can continue to move to the next step to avoid material jamming.
[0029] The lower surface of the upper die base 1 is fixedly connected with an upper pad 3 and a clamping plate 4 in sequence, and the punching punch 7, the half shearing punch 10 and the blanking punch 16 are all fixedly connected with the clamping plate 4; the stripper plate 5 is movably connected with the upper pad 3 through a spring assembly, and the punching punch 7, the half shearing punch 10 and the blanking punch 16 all extend out of the stripper plate 5 and are movably connected with the stripper plate 5. When pressed down, the stripper plate 5 can press the material strip 21 to ensure that the material strip 14 and the product have good flatness.
[0030] The lower die base 2 is evenly provided with a number of floating pins 14 along the length direction, and the floating pins 14 are symmetrically arranged at both ends of the lower die base 2 along the center line of the length direction of the lower die base 2; an annular groove is opened on the outer surface of the floating pin 14, and both ends of the width direction of the material strip 21 extend into the annular groove; the bottom of the floating pin 14 extends into the groove of the lower die base 2, and the floating pin 14 is movably connected with the groove of the lower die base 2 through an elastic component.
[0031] The annular groove of the floating pin 14 is used to limit the strip 21, so that the strip 21 can move forward in a straight line, avoiding the strip 21 from deviating relative to the lower die seat 2, resulting in stamping failure and material waste. During the pressing process, the upper die seat 1 can drive the floating pin 14 to move downward, so that the strip 21 moves downward and contacts the concave die of the lower die seat 2.
[0032] In one embodiment of the utility model, a fine punching punch 9 for improving the surface quality of the hole is arranged between the punching punch 7 and the half-shear punch 10. The rough punching + fine punching process is adopted. The first step of rough punching quickly removes most of the material to reduce the impact force and wear during fine punching, thereby improving the surface quality and precision of the final workpiece.
[0033] The front end of the upper die seat 1 is provided with a marking punch 6 for marking the non-forming area of the material strip 21, and the rear end of the punching punch 7 is provided with a guide needle 8; the marking punch 6 and the guide needle 8 are located on the same straight line along the running direction of the material strip 21.
[0034] The marking punch 6 can make special forming marks such as grooves, holes, and protrusions on the material strip 21, and the guide needle 8 is used to detect whether the material strip 21 has reached the specified position to prevent wrong feeding. The general detection principle is: a detection probe is set at the end of the guide needle 8. After feeding a certain distance, the marking point punched by the marking punch 6 reaches just below the guide needle 8. If the guide needle 8 detects the marking point when pressing down, the feeding is correct, otherwise the feeding is wrong.
[0035] Preferably, a shearing knife 17 is provided at the end of the upper die base 1, which can cut the material strip 21 with only remaining material into small pieces of material for easy storage, etc.
[0036] In summary, this solution ensures the flatness of the gasket through the cooperation of the half-shear punch, the half-shear die, and the supporting and extruding effect of the nitrogen spring on the gasket.
Claims
1. A gasket stamping die, characterized in that: The invention comprises an upper die base (1), a lower die base (2) and a feeding mechanism for conveying a material strip (21) to be punched, wherein the upper die base (1) is connected to a power mechanism; a punching punch (7) for punching a center hole, a half-shearing punch (10) for shearing a gasket shape and a blanking punch (16) for separating the gasket from the material strip (21) are sequentially arranged on the upper die base (1); The lower die base (2) is provided with a punching die, a half-shearing die (12) and a blanking die (13) respectively cooperating with the punching punch (7), the half-shearing punch (10) and the blanking punch (16); a cylindrical inner stripping block (11) is provided at the center of the half-shearing die (12), and the bottom of the inner stripping block (11) is connected to a nitrogen spring (20) via a push rod (18).
2. The gasket stamping die according to claim 1, characterized in that: A working plate (22) is fixed on the upper surface of the lower die seat (2), and the punching die, the half-shearing die (12) and the blanking die (13) are all arranged on the working plate (22); The bottom of the half-shearing die (12) is provided with a through hole for the ejector rod (18) to pass through, and the lower die base (2) is provided with a through hole for the nitrogen spring (20) to pass through; the diameter of the inner stripping block (11) is larger than the diameter of the through hole of the half-shearing die (12).
3. The gasket stamping die according to claim 1, characterized in that: The lower die base (2) is evenly provided with a plurality of floating pins (14) along the length direction, and the floating pins (14) are symmetrically arranged at the two ends of the lower die base (2) along the center line of the length direction of the lower die base (2); an annular groove is opened on the outer surface of the floating pin (14), and both ends of the material strip (21) in the width direction extend into the annular groove; the bottom of the floating pin (14) extends into the groove of the lower die base (2), and the floating pin (14) is movably connected to the groove of the lower die base (2) through an elastic component.
4. The gasket stamping die according to claim 1, characterized in that: A fine punch (9) for improving the surface quality of the hole is arranged between the punching punch (7) and the half-shear punch (10).
5. The gasket stamping die according to claim 1, characterized in that: A cylindrical top block (15) is fixedly connected to the center of the blanking die (13), and the curved surface of the top block (15) does not contact the side wall of the blanking die (13); a pushing mechanism for pushing the gasket is provided on one side of the blanking die (13), and a material receiving device is provided on the other side.
6. The gasket stamping die according to claim 1, characterized in that: The front end of the upper die seat (1) is provided with a marking punch (6) for marking the non-molding area of the material strip (21), and the rear end of the punching punch (7) is provided with a guide needle (8); the marking punch (6) and the guide needle (8) are located on the same straight line in the running direction of the material strip (21).
7. The gasket stamping die according to claim 1, characterized in that: A shearing knife (17) is provided at the end of the upper die seat (1).
8. The gasket stamping die according to claim 1, characterized in that: The lower surface of the upper die seat (1) is fixedly connected with an upper pad (3) and a clamping plate (4) in sequence, and the punching punch (7), the half-shear punch (10) and the blanking punch (16) are all fixedly connected to the clamping plate (4); the stripping plate (5) is movably connected to the upper pad (3) through a spring assembly, and the punching punch (7), the half-shear punch (10) and the blanking punch (16) all extend out of the stripping plate (5) and are movably connected to the stripping plate (5).