A convex point stamping die

Abstract

The present invention discloses a convex point stamping die, comprising an upper die and a lower die; a convex point punch is provided in the upper die; the lower die comprises a lower die seat and a spring seat arranged in sequence from top to bottom; a convex point die, a convex point limiting rod, a limiting block, and a stripping ejector are provided in the lower die seat; the convex point limiting rod is installed in the convex point die; the convex point limiting rod is located directly below the convex point punch; the stripping ejector is higher than the convex point limiting rod; the limiting block is movably installed in the convex point die; a lower die spring capable of acting on the stripping ejector is installed in the spring seat; when the die is closed for convexing, the limiting block is tightly attached to the edge of the product sheet located on the convex point die; when the die is opened for stripping, a gap exists between the limiting block and the edge of the product sheet. The die can reduce the maintenance frequency of the convex point die and ensure the stability of the product shape and convex point size, so that the product can meet the requirements.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a convex point stamping mold. Background Art

[0002] Currently, most automotive parts are produced using stamping dies. For frame products with bumps, such as those used in automotive seatbelt retractors, the bumps are close to the product edge, and there are regulatory standards for the product's external dimensions, with strict requirements for bump height. When forming the bumps, the existing molds' embossing dies require frequent maintenance, and burrs are easily generated at the ends of the bumps, making them incapable of mass production. Specifically, the stoppers used in existing molds to position the product sheet are typically fixed within the embossing dies. During the embossing process, the sheet is squeezed, causing it to bulge. After forming, the sheet becomes stuck between the embossing dies and the stoppers, resulting in squeezing and uneven force during stripping, which can easily cause burrs and severe wear on the embossing dies. Furthermore, during stripping, the embossing limiter, which cooperates with the punch, presses directly against the product's bumps. This creates a high force on the bumps, causing the bump height to fail to meet requirements. Furthermore, reducing the stripping force can lead to uneven stripping. Summary of the Invention

[0003] To address the above technical problems, the present invention provides a die for stamping convex points. This die optimizes its structure, reduces the maintenance frequency of the convex and concave dies, and simultaneously ensures the stability of the product's shape and convex point dimensions, enabling smooth production and meeting product requirements, saving maintenance and labor costs, and increasing production capacity.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] A convex dot stamping die comprises an upper die and a lower die; a convex dot punch for convex dot is provided in the upper die; the lower die comprises a lower die seat and a spring seat arranged in sequence from top to bottom; a convex dot die, a convex dot limiting rod, a limiting block and a stripping ejector are provided in the lower die; the convex dot limiting rod is installed in the convex dot die; the convex dot limiting rod is located directly below the convex dot punch; the stripping ejector is higher than the convex dot limiting rod; the limiting block is movably installed in the convex dot die; a lower die spring capable of acting on the stripping ejector is installed in the spring seat; when the die is closed for convex dotting, the limiting block is in close contact with the edge of the product sheet located on the convex dot die, and when the die is opened for stripping, a gap exists between the limiting block and the edge of the product sheet.

[0006] Furthermore, the upper die includes an upper die base assembly and a stripping assembly. The upper die base assembly includes an upper die base, an upper pad and an upper clamping plate arranged in sequence from top to bottom. The stripping assembly includes a stop plate and a stripping plate.

[0007] Furthermore, the embossing punch is installed in the upper clamping plate through the upper clamping plate block, and the embossing punch passes through the stop plate and the stripping plate downward in sequence.

[0008] Furthermore, the limit stopper is an inclined block structure, and the side thereof away from the product sheet is an inclined surface.

[0009] Furthermore, a limit stop reset push rod and a limit stop reset spring are installed in the lower die; the limit stop reset push rod acts on the limit stop, and the limit stop reset spring acts on the limit stop reset push rod.

[0010] Furthermore, the limit stop reset push rod is installed in the lower die base through a lower clamping plate block; the limit stop reset spring is installed in the lower die base through a lower pad block.

[0011] Furthermore, the lower die spring is a nitrogen spring.

[0012] Furthermore, the lower die base is also equipped with a knockout plate, a hitting rod B and a hitting rod A arranged in sequence from bottom to top. The lower die spring acts on the knockout plate, the knockout plate acts on the stripping ejector rod and the hitting rod B, the hitting rod B acts on the hitting rod A, and the hitting rod A acts on the bump limit rod.

[0013] Furthermore, when the mold is in the open state, there is a gap of 0.6 mm between the limit stopper and the edge of the product sheet.

[0014] Furthermore, the height difference between the stripping ejector pin and the convex point limiting rod is the convex point height.

[0015] The beneficial effects of the present invention are:

[0016] The present invention designs the limit block to be a movable structure, and is an inclined block structure, so that when the material is removed after the convex point is formed, the limit block can move as the mold opening action proceeds. There is a gap between the limit block and the sheet material, ensuring that the sheet material will not be squeezed, thereby avoiding the generation of burrs. It can not only ensure that the shape and size of the sheet material meet the requirements, but also reduce the wear of the convex and concave dies.

[0017] The mold of the present invention also adds a stripping ejector for stripping, which is pushed at the non-convex point position of the sheet material. When stripping, it can reduce the stripping force of the convex point, ensure that the convex point height meets the requirements, and ensure smooth stripping.

[0018] The present invention optimizes the structure of the mold, reduces the maintenance frequency of the embossing mold, and also ensures the stability of the product shape and the convex point size, so that the product can be produced smoothly and meet the requirements, saves maintenance costs and labor costs, and improves production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the convex point stamping mold of the present invention when the mold is opened.

[0020] Figure 2 It is a cross-sectional view of the convex point stamping mold of the present invention when the mold is closed.

[0021] Figure 3 It is a partial structural schematic diagram of the limit block in the convex point stamping mold of the present invention.

[0022] Figure 4 It is a partial structural schematic diagram of the lower die in the convex point stamping die of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the limit stopper in the convex point stamping forming die of the present invention.

[0024] In the figure, 1: upper die base; 2: upper pad; 3: upper clamping plate; 4: stop plate; 5: stripping plate; 6: product sheet, 61: convex point; 7: lower die base; 8: spring seat; 9: embossing punch; 10: upper clamping plate block; 11: embossing die; 12: lower clamping plate block; 13: lower pad block; 14: convex point limit rod; 15: limit block; 16: stripping ejector rod; 17: limit block reset ejector rod; 18: limit block reset spring; 19: lower die spring; 20: knockout plate; 21: hitting rod B; 22: hitting rod A. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0027] like Figures 1 to 4 A preferred embodiment of a convex dot stamping die is shown; the die comprises an upper die and a lower die. The upper die comprises an upper die base assembly and a stripper assembly. The upper die base assembly comprises, from top to bottom, an upper die base 1, an upper backing plate 2, and an upper clamping plate 3. The stripper assembly comprises a stop plate 4 and a stripper plate 5. The lower die comprises, from top to bottom, a lower die base 7 and a spring seat 8.

[0028] The upper backing plate 2 and the upper clamping plate 3 are fixedly connected to the upper die base 1; the stop plate 4 and the stripper plate 5 are fixedly connected as a whole; the upper die base 1 and the stripper assembly (the stop plate 4 and the stripper plate 5 fixedly connected as a whole) are movably connected via a connector (such as a height-adjusting bolt, not shown) that passes through the upper backing plate 2 and the upper clamping plate 3. A spring element (not shown) is also installed on the upper die base 1. This spring element passes through the upper backing plate 2 and the upper clamping plate 3 and presses against the stop plate 4. The upper die base assembly (upper die base 1, upper backing plate 2, and upper clamping plate 3) can move up and down relative to the stripper assembly (the stop plate 4 and the stripper plate 5).

[0029] A embossing punch 9 is provided in the upper die. The embossing punch 9 is installed in the upper clamping plate 3 through the upper clamping plate block 10, and the embossing punch 9 passes through the stop plate 4 and the stripper plate 5 downwards in sequence.

[0030] The lower die base 7 is provided with an installation cavity, in which are installed, from top to bottom, a embossing die 11, a lower clamping plate block 12, and a lower pad block 13. A convex point limiting rod 14, a limiting block 15, and a stripping ejector rod 16 are also provided in the lower die base 7 of the lower die. The convex point limiting rod 14 is installed in the embossing die 11; the convex point limiting rod 14 is located directly below the embossing punch 9; and the top end of the convex point limiting rod 14 is lower than the upper surface of the embossing die 11, forming a embossing cavity; the convex point limiting rod 14 cooperates with the embossing punch 9 to perform the embossing operation. The stripping ejector rod 16 is located to the side of the convex point limiting rod 14, and its top end is higher than the convex point limiting rod 14, and can be pressed against the product sheet 6; the height difference between the stripping ejector rod 16 and the convex point limiting rod 14 is the height of the convex point after forming. The limiting block 15 is movably installed in the embossing die 11. Specifically, a limit stop reset push rod 17 and a limit stop reset spring 18 are installed in the lower die base 7 of the lower die; the limit stop reset push rod 17 is installed in the lower die base 7 through the lower clamping plate block 12; the limit stop reset spring 18 is installed in the lower die base 7 through the lower pad block 13. The limit stop reset push rod 17 directly acts on the limit stop 15, and the limit stop reset spring 18 directly acts on the limit stop reset push rod 17. Figure 5 As shown, the stopper 15 is an inclined block structure, with a sloped surface facing away from the product sheet 6 and a straight surface facing the product sheet 6. During mold closing and embossing, the straight surface of the stopper 15 is in close contact with the edge of the product sheet on the embossing die 11. During mold opening and ejection, a gap exists between the stopper 15 and the edge of the product sheet 6.

[0031] A lower die spring 19 is installed in the spring seat 8 ; in this embodiment, the lower die spring 19 is a nitrogen spring.

[0032] The lower die base 7 is also equipped with a knockout plate 20, a hitting rod B 21, and a hitting rod A 22, which are arranged in sequence from bottom to top. The lower die spring 19 directly acts on the knockout plate 20, which can directly act on the stripping ejector pin 16 and the hitting rod B 21. The hitting rod B 21 acts on the hitting rod A 22, and the hitting rod A 22 acts on the bump limiting rod 14. In this embodiment, during stripping, the stripping ejector pin 16 and the bump limiting rod 14 act synchronously, so that the formed bumps and the product sheet are subjected to force together, which can reduce the bump stripping force, ensure that the bump height meets the requirements, and ensure smooth stripping.

[0033] According to the number of convex points on the product sheet, a corresponding number of convex point limit rods and convex punches can be set, and a corresponding number of stripping ejector rods and lower die springs can also be set.

[0034] When working, Figure 1 As shown, the mold is in the open state. At this time, the limit stop 15 is in a floating state under the action of the limit stop reset push rod 17 and the limit push rod reset spring 18, and there is a 0.6mm gap between the limit stop 15 and the product sheet 6; the upper mold moves downward, and the stripper plate 5 contacts the upper surface of the limit stop 15; the upper mold continues to move, and the stripper plate 5 moves downward to press the product sheet 6, and the limit stop 15 moves closely to the edge of the product sheet 6; the upper mold base 1, the upper pad 2, the upper splint 3, and the embossing punch 9 continue to move downward, and the embossing punch 9 cooperates with the convex point limit rod 14 in the lower mold to complete the embossing molding. At this time, the mold is in the closed state, as shown Figure 3 As shown in the figure, after the bump 61 is formed, the upper die begins to move upward, and the lower die spring 19 also begins to move upward, pressing against the knockout plate 20. Driven by the knockout plate 20, the driving rods B 21, A 22, the bump stopper 14, and the stripper 16 all move upward synchronously, thereby separating the product sheet 6 with the bump from the embossing die 11. During stripping, the movement of the stopper 15 creates a gap between the product sheet 6 and the stripper, ensuring that the product sheet is not squeezed during stripping, thus preventing the formation of burrs. This not only ensures that the sheet meets the required shape and size, but also reduces wear on the embossing die.

[0035] The present invention optimizes the structure of the mold, reduces the maintenance frequency of the embossing mold, and also ensures the stability of the product shape and the convex point size, so that the product can be produced smoothly and meet the requirements, saves maintenance costs and labor costs, and improves production capacity.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A convex point stamping die, characterized in that: The invention comprises an upper die and a lower die; a embossing punch for embossing dots is provided in the upper die; the lower die comprises a lower die seat and a spring seat arranged in sequence from top to bottom; a embossing die, a embossing limit rod, a limit stop and a stripping ejector rod are provided in the lower die seat; the embossing limit rod is installed in the embossing die; the embossing limit rod is located directly below the embossing punch; the stripping ejector rod is higher than the embossing limit rod; the limit stop is movably installed in the embossing die; a lower die spring capable of acting on the stripping ejector rod is installed in the spring seat; when the mold is closed for embossing, the limit stop is in close contact with the edge of the product sheet located on the embossing die, and when the mold is opened for stripping, a gap exists between the limit stop and the edge of the product sheet; The limit stopper is an inclined block structure, and the side away from the product sheet is an inclined surface; A limit stop reset push rod and a limit stop reset spring are installed in the lower die; the limit stop reset push rod acts on the limit stop, and the limit stop reset spring acts on the limit stop reset push rod; When the mold is in the open state, there is a 0.6mm gap between the limit stop and the edge of the product sheet; The height difference between the stripping ejector pin and the convex point limiting rod is the convex point height.

2. A convex point stamping die according to claim 1, characterized in that: The upper die includes an upper die base assembly and a stripping assembly. The upper die base assembly includes an upper die base, an upper pad and an upper clamping plate arranged in sequence from top to bottom. The stripping assembly includes a stop plate and a stripping plate.

3. A convex point stamping die according to claim 2, characterized in that: The embossing punch is installed in the upper clamping plate through the upper clamping plate block, and the embossing punch passes through the stop plate and the stripping plate downward in sequence.

4. A convex point stamping die according to claim 1, characterized in that: The limit stop reset push rod is installed in the lower die base through the lower clamping plate block; the limit stop reset spring is installed in the lower die base through the lower pad block.

5. A convex point stamping die according to claim 1, characterized in that: The lower die spring is a nitrogen spring.

6. A convex point stamping die according to claim 1, characterized in that: The lower die base is also equipped with a knockout plate, a hitting rod B and a hitting rod A arranged in sequence from bottom to top. The lower die spring acts on the knockout plate, the knockout plate acts on the stripping ejector rod and the hitting rod B, the hitting rod B acts on the hitting rod A, and the hitting rod A acts on the convex point limit rod.

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