Small-space stamping mechanism from inside to outside
By designing the stamping mechanism from the inside to the outside in a small space, using specific mold components and guide structures, the problem of stamping from the inside to the outside in a small space is solved, and the product inner wall is smooth and burr-free, and a flexible stamping method is provided.
Patent Information
- Application Number
- CN202520880147.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2035-05-07
AI Technical Summary
In the stamping field, when there are holes in the stretched product, it is difficult for the prior art to design stamping from the inside to the outside in a small space, resulting in burrs in the inner wall of the product, which cannot meet customers' requirements for smooth inner walls.
A small space stamping mechanism from the inside to the outside is designed, including an upper die seat and a lower die seat. Using components such as fixed plates, pressing blocks, punching die inserts and driving punches, the punching operation is realized from the inside to the outside through a 45° inclined guide surface and guide portion.
The molds are stamped from the inside out in small products and small spaces to ensure that the product is smooth and burr-free, and horizontal side punch and 45° oblique punch can be achieved as needed.
Smart Images
Figure CN223011663U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machinery, in particular to an inner-to-outer stamping mechanism in a small space. Background Art
[0002] In the field of stamping, when there are perforations on the drawn part product, it is generally preferred to punch from the outside to the inside to ensure there is enough space to design the punch, the blank holder, and the stripping mechanism. In this way, the burrs generated by stamping will be on the inner wall of the product. Once the customer requires the inner wall of the product to be smooth without burrs, it is impossible to design according to the punching method from the outside to the inside. Summary of the Utility Model
[0003] The purpose of the utility model is to provide an inner-to-outer stamping mechanism in a small space that solves or partially solves the above technical problems.
[0004] To achieve the above purpose, the utility model provides the following technical solutions:
[0005] An inner-to-outer stamping mechanism in a small space, which includes an upper die base and a lower die base. A fixed plate is arranged on the upper die base, a blank holder is arranged on the fixed plate, a punching concave die insert is arranged on one side of the blank holder, a through side hole is arranged on the punching concave die insert, a stop block for limiting the punching concave die insert is arranged on the side of the punching concave die insert, and a through waste discharge hole corresponding to the side hole is arranged on the stop block; a lower backing plate is arranged on the lower die base, a driving punch is arranged on the lower backing plate, a punching punch is arranged at the top of the driving punch, a guiding hole is arranged on the punching punch, a 45° inclined guiding surface is arranged in the guiding hole, a guiding part matching the shape of the guiding hole is arranged at the top of the driving punch, and the guiding part is movably arranged in the guiding hole; a protruding part extending into the side hole is arranged on the punching punch.
[0006] Preferably, a floating positioning sleeve is movably sleeved outside the driving punch, the upper part of the floating positioning sleeve abuts against the punching punch, and a compression spring is arranged at the lower part of the floating positioning sleeve.
[0007] Preferably, a lower template with a central hole is arranged on the lower die base, the driving punch is arranged in the central hole of the lower template, and a fixing block for limiting the driving punch and the floating positioning sleeve is arranged in the central hole.
[0008] Preferably, a lower stripper plate sleeved on the driving punch is also movably arranged on the lower die base.
[0009] Preferably, a limiting strip protruding inward is arranged on the fixing block, and a convex strip corresponding to the limiting strip is arranged on the outer wall of the floating positioning sleeve.
[0010] Preferably, the punching punch has a horizontal top surface that abuts against the lower surface of the blank holder, and the side hole is horizontally arranged.
[0011] Preferably, the side hole is arranged at an inclination of 45°, and the punching punch has an inclined surface that matches the shape of the side hole.
[0012] The beneficial effects of the present utility model are as follows: It can achieve the stamping of the mold from the inside to the outside in the case of small products and small spaces, making the burrs on the outside of the product, thus ensuring that the inside of the product is smooth and free of burrs; The present utility model can also achieve horizontal side punching and 45° inclined punching according to needs. Description of the Drawings
[0013] Figure 1 is a schematic cross-sectional structure diagram in the mold-closed state of the first embodiment of the present utility model;
[0014] Figure 2 is a schematic cross-sectional structure diagram in the mold-open state of the first embodiment of the present utility model;
[0015] Figure 3 is Figure 2 a partial enlarged view of A in
[0016] Figure 4 is a schematic cross-sectional structure diagram in the mold-closed state of the second embodiment of the present utility model;
[0017] Figure 5 is a three-dimensional structure diagram of the workpiece. Detailed Description of the Preferred Embodiments
[0018] The technical solutions of the present utility model will be further described in detail below in conjunction with the specific embodiments.
[0019] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0020] As Figures 1 to 5 shown, a stamping mechanism for punching from the inside to the outside in a small space of the present utility model includes an upper die base 10 and a lower die base 12. A fixing plate 14 is arranged on the upper die base 10, a blank holder 16 is arranged on the fixing plate 14, a punching die insert 18 is arranged on one side of the blank holder 16, a through side hole 20 is arranged on the punching die insert 18, a stop block 22 for limiting the punching die insert 18 is arranged on the side of the punching die insert 18, and a through waste discharge hole 24 corresponding to the side hole 20 is arranged on the stop block 22.
[0021] A lower bolster plate 26 is provided on a lower die base 12. A driving punch 28 is provided on the lower bolster plate 26. A punching punch 30 is provided at the top of the driving punch 28. A guiding hole 32 is formed in the punching punch 30. A guiding surface inclined at 45° is provided in the guiding hole 32. A guiding portion 34 matching the shape of the guiding hole 32 is provided at the top of the driving punch 28. The guiding portion 34 is movably arranged in the guiding hole 32. A protruding portion 36 that can extend into a side hole 20 is provided on the punching punch 30. A lower template 38 with a central hole is provided on the lower die base 12. The driving punch 28 is arranged in the central hole of the lower template 38. A fixing block 40 for limiting the driving punch 28 and a floating positioning sleeve 44 is provided in the central hole. A lower stripper plate 42 sleeving on the driving punch 28 is also movably arranged on the lower die base 12.
[0022] Further, a floating positioning sleeve 44 is movably sleeved outside the driving punch 28. The upper part of the floating positioning sleeve 44 abuts against the punching punch 30. A compression spring (not marked) is provided at the lower part of the floating positioning sleeve 44.
[0023] A limiting strip 46 protruding inward is provided on the fixing block 40. A convex strip 48 corresponding to the limiting strip 46 is provided on the outer wall of the floating positioning sleeve 44.
[0024] In the first embodiment, the punching punch 30 has a horizontal top surface, and the side hole 20 is horizontally arranged.
[0025] In the second embodiment, the side hole 20 is inclined at 45°, and the punching punch 30 has an inclined surface 50 matching the shape of the side hole 20.
[0026] Taking the movement of the lower die base 12 as an example in the first embodiment of the present utility model, the working principle of the present utility model is as follows: First, a cup-shaped workpiece 52 is placed on the punching punch 30. At this time, the driving punch 28 and the punching punch 30 are in the state of the maximum distance. The lower die base 12 moves upward until the workpiece 52 contacts the blank holder 16. The punching punch 30 stops moving upward, and the driving punch 28 continues to move upward. The punching punch 30 is driven to move horizontally outward through the guiding surface inclined at 45° and extends into the side hole 20, so as to cooperate with the punching die insert 18 to complete the punching operation on the workpiece 52. The waste material is discharged through the waste discharge hole 24 (air blowing for waste discharge can be used). After the mold is opened, the floating positioning sleeve 44 pushes the punching punch 30 upward, so as to push the workpiece 52 upward through the punching punch 30 to realize demolding. Because it punches from the inside to the outside, there are no burrs on the inner wall.
[0027] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.
Claims
1. A small space inside-out stamping mechanism, comprising an upper die base and a lower die base, characterized in that: A fixing plate is provided on the upper die seat, a pressing block is provided on the fixing plate, a punching die insert is provided on one side of the pressing block, a through side hole is provided on the punching die insert, a blocking block for limiting the punching die insert is provided on the side of the punching die insert, and a through waste discharge hole is provided on the blocking block corresponding to the side hole; a lower pad is provided on the lower die seat, a driving punch is provided on the lower pad, a punching punch is provided on the top of the driving punch, a guide hole is opened on the punching punch, a guide surface inclined at 45° is provided in the guide hole, a guide portion matching the shape of the guide hole is provided on the top of the driving punch, and the guide portion is movably arranged in the guide hole; a protrusion extending into the side hole is provided on the punching punch.
2. A small space inside-outside punching mechanism according to claim 1, characterized in that: A floating positioning sleeve is movably sleeved outside the driving punch, the upper portion of the floating positioning sleeve abuts against the punching punch, and a compression spring is disposed at the lower portion of the floating positioning sleeve.
3. A small space inside-outside punching mechanism according to claim 2, characterized in that: The lower die base is provided with a lower die plate with a center hole, the driving punch is arranged in the center hole of the lower die plate, and a fixing block for limiting the driving punch and the floating positioning sleeve is arranged in the center hole.
4. A small space inside-outside punching mechanism according to claim 3, characterized in that: The lower die base is also movably provided with a lower unloading plate sleeved on the driving punch.
5. A small space inside-outside punching mechanism according to claim 3, characterized in that: The fixing block is provided with a limiting strip protruding inwards, and the outer wall of the floating positioning sleeve is provided with a convex strip corresponding to the limiting strip.
6. A small space inside-outside punching mechanism according to claim 1, characterized in that: The punching punch has a horizontal top surface that abuts against the lower surface of the pressing block, and the side hole is arranged horizontally.
7. A small space inside-outside punching mechanism according to claim 1, characterized in that: The side hole is inclined at 45 degrees, and the punch has an inclined surface matching the shape of the side hole.