Ultra-thin metal plate special-shaped convex hull crease-resistant stamping die
By adding surrounding stretching avoidance structure and pressing reinforcement lines on the stamping mold, the problem of ultra-thin sheet metal special-shaped convex hulls prone to wrinkles close to the edges is solved, achieving a more uniform stress distribution and higher molding quality.
Patent Information
- Application Number
- CN202323575784.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-27
AI Technical Summary
During the stamping of ultra-thin sheet metal special-shaped convex hull, the convex hull is prone to wrinkles when it is close to the edge of the board, resulting in poor molding quality.
An ultra-thin sheet metal special-shaped convex hull anti-wrinkle stamping mold is designed. By setting a uniformly wrapped stretching avoidance structure and pressing rib lines on the concave die, the pressing force at the edge of the sheet is enhanced to ensure the forming quality.
It effectively avoids wrinkling caused by too little local pressure force, and ensures the forming quality and plane transition effect of the convex hull structure.
Smart Images
Figure CN222242245U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stamping dies, in particular to an ultra-thin sheet metal special-shaped convex hull wrinkle-proof stamping die. Background Art
[0002] The front frame of a certain splicing screen is stamped from an ultra-thin stainless steel sheet, on which an irregular convex structure needs to be stamped. Since the sheet is thin, when the local pressing force is too small, the sheet surface around the convex bulge is prone to wrinkling, especially when the convex bulge forming position is close to the edge of the sheet. Due to the small pressing area, the local pressing force is smaller than the pressing force in other directions, so it is very easy for wrinkles to appear at the position where the convex bulge is close to the edge of the sheet, affecting the forming quality of the irregular convex bulge. Summary of the invention
[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides an anti-wrinkle stamping die for special-shaped convex hulls of ultra-thin sheet metal, which avoids wrinkling when stamping special-shaped convex hulls on ultra-thin sheets and ensures the molding quality of special-shaped convex hulls of ultra-thin sheet metal.
[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides an ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die, including a die body, on which is provided a groove adapted to the punch contour, and a stretching avoidance structure is arranged around the groove, for forming a uniformly surrounding stretching avoidance zone on the outside of the groove notch.
[0005] Furthermore, the stretching avoidance structure is an avoidance groove surrounding the groove opening, and the avoidance groove wall is arranged equidistantly from the groove opening contour.
[0006] Furthermore, the groove depth of the avoidance groove is set lower than the material thickness of the plate to be punched.
[0007] Furthermore, the avoidance groove is transitionally connected to the groove rounded corner.
[0008] Furthermore, the inner groove surface of the groove is arranged to be inclined, and the inner groove surface is arranged to be gathered from the groove opening to the groove bottom.
[0009] Furthermore, a rib line is provided on the die body corresponding to the edge of the plate.
[0010] Furthermore, the ribbed wire is fixedly arranged on the top of the adjusting block, the adjusting block is slidably matched with the vertical guide groove, and the adjusting block is connected to a driving device for driving the adjusting block to rise and fall.
[0011] Beneficial effects: The utility model is an ultra-thin sheet metal special-shaped convex wrinkle-proof stamping die. By adding a uniformly surrounding stretching avoidance zone on the basis of the original concave die, the force around the punched part of the sheet is uniform, avoiding the wrinkling phenomenon caused by too small local pressing force. By adding a rib line, when stamping a convex bulge near the edge of the sheet, the pressing force on the edge of the sheet can be further increased, thereby ensuring the molding quality of the convex bulge structure near the edge of the sheet. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Attached Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;
[0013] Attached Figure 2 It is a schematic side sectional view of a local structure of an embodiment of the utility model. DETAILED DESCRIPTION
[0014] The utility model is further described below in conjunction with the accompanying drawings.
[0015] As attached Figure 1-2 The ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die comprises a die body 1, on which a groove 2 adapted to the punch profile is arranged, and a stretching avoidance structure 3 is arranged around the groove 2, which is used to form a uniformly surrounding stretching avoidance interval outside the notch of the groove 2.
[0016] This solution adds a stretching avoidance structure to the edge of the original die, so that an annular stretching transition area is formed between the part punched by the die and the punch and the part pressed by the die on the peripheral side. The plate in this area is naturally stretched without restraint, so that the speed at which the stretched material flows into the cavity is adaptively changed, so that the peripheral side of the first punching part of the plate is evenly stressed, thereby avoiding wrinkles around the bulge caused by too small local pressing force.
[0017] In the embodiment, the stretching avoidance structure 3 is an avoidance groove surrounding the notch of the groove 2, and the wall of the avoidance groove is equidistant from the notch contour of the groove 2. This makes the force on the periphery of the die uniform, ensuring that the plate in the stretching transition area is naturally stretched uniformly, so that after stamping, an equal-width inclined slope transition connecting the sheet metal plane and the convex hull is formed. Preferably, the groove depth of the avoidance groove is set lower than the material thickness of the plate to be punched. In actual application, a proportionally enlarged half shear die can be added to the original notch of the die.
[0018] Preferably, the avoidance groove is connected to the groove 2 with a rounded transition, so as to avoid the turning point being too stiff, resulting in excessive local force, causing the plate to be torn or broken at the bend. The inner groove surface of the groove 2 is inclined, and the inner groove surface is gathered from the groove mouth to the groove bottom, which slows down the degree of bending transition and facilitates the formation of the convex hull.
[0019] The die body 1 is provided with a ribbed line 4 corresponding to the edge of the sheet. The ribbed line 4 is fixed to the top of the adjustment block 5, and the adjustment block 5 is slidably matched with the vertical guide groove. The adjustment block 5 is connected to a driving device that drives it to rise and fall. By setting the ribbed line, the pressing force near the edge of the sheet can be enhanced, thereby ensuring that the pressing force near the edge is sufficient during stamping, and avoiding wrinkling caused by insufficient pressing force. The ribbed line is raised and lowered relative to the upper end surface of the die, and the pressing force at the edge of the sheet can be adjusted. The upward adjustment can increase the pressing force, and the downward adjustment can reduce the pressing force.
[0020] On this basis, the embossing line is further arranged parallel to the contour line of the edge of the plate relative to the groove, and the adjustment block 5 where the embossing line is located is adjustable relative to the contour line; when in use, the position of the embossing line can be adjusted according to the distance of the special-shaped bulge on the plate close to the edge; wherein, when the position of the bulge required for medium pressure forming is closer to the edge of the plate, the corresponding position of the embossing line on the die is adjusted higher and closer relative to the die notch, thereby providing sufficient pressing force, avoiding the occurrence of wrinkling, and ensuring the forming quality of the special-shaped bulge.
[0021] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. An ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die, characterized in that: The die body (1) is provided with a groove (2) adapted to the punch profile, and a stretching avoidance structure (3) is arranged around the groove (2) to form a uniformly surrounding stretching avoidance zone outside the notch of the groove (2).
2. The ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die according to claim 1, characterized in that: The stretching avoidance structure (3) is an avoidance groove surrounding the notch of the groove (2), and the wall of the avoidance groove is arranged equidistantly from the notch contour of the groove (2).
3. The ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die according to claim 2, characterized in that: The depth of the avoidance groove is set lower than the material thickness of the plate to be punched.
4. The ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die according to claim 3, characterized in that: The avoidance groove is connected to the groove (2) by a rounded transition.
5. The ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die according to claim 4, characterized in that: The inner groove surface of the groove (2) is arranged to be inclined, and the inner groove surface is arranged to gather from the groove opening to the groove bottom.
6. The ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die according to claim 5, characterized in that: A rib line (4) is provided on the die body (1) corresponding to the edge of the plate.
7. The ultra-thin sheet metal special-shaped convex anti-wrinkle stamping die according to claim 6, characterized in that: The rib pressing line (4) is fixedly arranged on the top of the adjusting block (5), the adjusting block (5) is slidably matched with the vertical guide groove, and the adjusting block (5) is connected to a driving device for driving it to rise and fall.