Stamping die structure for improving R angle cracking

Abstract

The utility model provides a stamping die structure capable of improving R angle cracking, a stamping part is stamped and formed by a stamping die, an R angle convex hull is arranged at the R angle of the stamping part, the stamping die is provided with a convex hull forming stamping die, a fine trimming stamping die and a shaping stamping die, the upper die and the lower die of the convex hull forming stamping die are provided with convex hull forming structures corresponding to the R angle, and the convex hull is stamped at the position of the R angle. According to the improved die, the material tension at the R angle position is increased, the material tension is large during stamping, the forming of the R angle of the sheet metal part is improved, and the sheet metal part cannot crack, the material of an R angle convex hull is reduced by 1.0 by additionally arranging the outer pipe position and the fine cutting stamping die, the material pressing force of an inner stripper plate is changed from 630 KG to 490 KG, the phenomenon that the R angle of a stamping product of the sheet metal part cracks during forming is avoided, and the high efficiency of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold design and manufacturing, in particular to a stamping mold structure for improving R-angle cracking. Background Art

[0002] With the widespread application of die stamping in the field of mechanical processing, R corner forming cracking is a common problem in the production process of stamping products, which is prevalent in major automobile manufacturers. On the one hand, it reduces the stability and production efficiency of the production process, and the scrap rate of parts increases. On the other hand, it will cause more serious wear of the mold, reduce the mold life and the precision of the workpiece, increase the number of mold repairs and production downtime, especially there are few stamping die structures that can improve R corner cracking. The main reason for the problem is: the rounded forming edge is seriously wrinkled, which increases the material thickness, which is greater than the forming gap, resulting in R corner forming cracking of the product, resulting in reduced equipment processing efficiency, increased difficulty in manual operation, increased labor and mold repair costs, and cannot be applied to large-scale quantitative production, which makes the degree of automation and production efficiency of workpiece processing low.

[0003] Therefore, it is necessary to develop a stamping die structure that improves R-angle cracking and reduces and improves R-angle forming cracking. Summary of the invention

[0004] The utility model provides a stamping die structure for improving R-angle cracking, adopts a convex hull forming structure as a convex hull punch, punches a convex hull at the R-angle position, increases material tension at the R-angle position, and facilitates high material tension during stamping, thereby improving R-angle forming of sheet metal parts without cracking.

[0005] In order to solve the above problems, the utility model provides a stamping die structure for improving R corner cracking, including a sheet metal part and a stamping die. The stamping die stamps and forms the stamping part. The R corner of the sheet metal part is provided with an R corner bulge. The stamping die is provided with a bulge forming die, a fine cutting die and a shaping die. The upper die and the lower die of the bulge forming die are provided with a bulge forming structure corresponding to the R corner, and the fine cutting die and the shaping die are provided with an outer tube position.

[0006] Preferably, the convex hull forming structure is a convex hull punch and a convex hull insert.

[0007] The convex forming structure is a convex punch and a convex insert. The convex is punched at the R corner position to increase the material tension at the R corner position, so that the material tension is large during stamping, thereby improving the R corner forming of the sheet metal without cracking.

[0008] Preferably, the finishing edge punching die is provided with a finishing edge punch and a finishing edge insert for finishing the sheet metal parts.

[0009] Preferably, after the R-angle bulge of the sheet metal part is formed, the finishing punch and the finishing insert of the finishing edge punching die punch out a 1.0 mm margin on the edge of the bulge.

[0010] The fine cutting punch of the fine cutting die punches out a 1.0 mm margin on the edge of the convex hull, which is used for R-angle reduction, thereby reducing material tension and promoting stamping forming.

[0011] Preferably, the pressing force of the inner stripper plate of the fine trimming die is set to 490KG.

[0012] The pressing force of the inner stripper plate reduces the requirements for coordinated mold processing and improves production efficiency.

[0013] Preferably, the lower die of the shaping die is provided with a forming plate and a forming insert for integral stamping.

[0014] Preferably, the outer tube positions and fixes the R angle position of the sheet metal component.

[0015] The R-angle forming position increases the outer tube position to prevent the stamping parts from moving and is precisely fixed.

[0016] Preferably, the sheet metal parts of the convex hull forming die, the fine trimming die and the shaping die are continuously and automatically transferred to the die processing position by a robot.

[0017] The sheet metal parts of the convex hull forming die, the fine trimming die and the shaping die are continuously and automatically transferred to the die processing position by the manipulator, so as to realize the automation of the die and improve the production efficiency.

[0018] The beneficial effects of the utility model are: the convex hull forming structure is used as the convex hull punch, and the convex hull is punched at the R corner position, which increases the material tension at the R corner position, facilitates the material tension to be large during punching, improves the R corner forming of the sheet metal part and does not crack, and the improved mold reduces the R corner hull by 1.0 by adding an external tube position and a precision cutting die, and the pressing force of the inner stripping plate is changed from 630KG to 490KG, which solves the cracking phenomenon of the R corner forming of the sheet metal stamping product and improves the product efficiency. It has the following advantages:

[0019] (1) Use R-angle reduction to reduce material tension and promote stamping;

[0020] (2) Punching a convex bulge at the R corner position increases material tension and promotes stamping;

[0021] (3) The R-angle forming position adds an outer tube position to prevent the stamping part from moving and is accurately fixed;

[0022] (4) The pressing force of the internal stripping plate reduces the requirements for coordinated mold processing and improves demoulding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a convex stamping upper die according to an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the convex hull stamping lower die of the embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of a sheet metal part according to an embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the convex hull material reduction in an embodiment of the utility model.

[0027] Attached photos

[0028] 1. Convex punch; 2. Fine cutting punch; 3. Forming plate; 4. Convex insert; 5. Fine cutting insert; 6. Forming insert; 7. Outer tube position; 8. R angle; 9. Convex reduction position. DETAILED DESCRIPTION

[0029] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with the accompanying drawings and specific embodiments, but is not limited thereto.

[0030] like Figures 1 to 4 As shown, a specific embodiment of the utility model improves the stamping die structure for R-angle cracking, including a sheet metal part and a stamping die. The stamping die stamps and forms the stamping part. An R-angle bulge is provided at the R-angle 8 of the sheet metal part. The stamping die is provided with a bulge forming die, a fine trimming die and a shaping die. The upper die and the lower die of the bulge forming die are provided with a bulge forming structure corresponding to the R-angle 8, and the fine trimming die and the shaping die are provided with an outer tube position 7.

[0031] Furthermore, the convex hull forming structure is a convex hull punch 1 and a convex hull insert 4 .

[0032] The convex forming structure is a convex punch 1 and a convex insert 4. The convex is punched at the R angle 8 position to increase the material tension at the R angle 8 position, so that the material tension is large during stamping, and the R angle 8 of the sheet metal part is formed without cracking.

[0033] Furthermore, the finishing edge punching die is provided with a finishing edge punch 2 and a finishing edge insert 5 for finishing the sheet metal parts.

[0034] Furthermore, after the R corner 8 of the sheet metal part is convexly formed, the finishing edge punch 2 and the finishing edge insert 5 of the finishing edge punching die punch out the edge of the convex hull with a margin of 1.0 mm.

[0035] The finishing punch 2 of the finishing die punches out a 1.0 mm margin on the edge of the convex hull, which is used for R angle 8 material reduction, thereby reducing material tension and promoting stamping forming.

[0036] Furthermore, the pressing force of the inner stripping plate of the fine trimming die is set to 490KG.

[0037] The pressing force of the inner stripper plate reduces the requirements for coordinated mold processing and improves production efficiency.

[0038] Preferably, the lower die of the shaping die is provided with a forming plate 3 and a forming insert 6 for integral stamping.

[0039] Furthermore, the outer tube position 7 positions and fixes the R corner 8 of the sheet metal component.

[0040] The R angle 8 forming position adds the outer tube position 7 to prevent the stamping part from moving and fix it accurately.

[0041] Preferably, the sheet metal parts of the convex hull forming die, the fine trimming die and the shaping die are continuously and automatically transferred to the die processing position by a robot.

[0042] The sheet metal parts of the convex hull forming die, the fine trimming die and the shaping die are continuously and automatically transferred to the die processing position by the manipulator, so as to realize the automation of the die and improve the production efficiency.

[0043] The improved mold in this embodiment, by adding an outer tube position 7 and an R corner convex hull and reducing the material by 1.0, is made of CR12, HRC50~53 degrees, and the pressing force of the inner stripping plate is changed from 630KG to 490KG, which solves the problem of cracking during the forming of the R corner 8 of the stamping product, allowing the product to be successfully implemented in high-speed mass production.

[0044] The beneficial effects of the utility model are: the convex hull forming structure is adopted as the convex hull punch 1, and the convex hull is punched at the R angle 8 position, which increases the material tension at the R angle 8 position, facilitates the material tension to be large during punching, improves the R angle 8 forming of the sheet metal part and does not crack, and the improved mold reduces the R angle 8 convex hull by 1.0 by adding the outer tube position 7 and the precision cutting die, and the pressing force of the inner stripping plate is changed from 630KG to 490KG, which solves the cracking phenomenon of the R angle 8 forming of the sheet metal stamping product and improves the product efficiency. It has the following advantages:

[0045] (1) Use R angle 8 material reduction method to reduce material tension and promote stamping;

[0046] (2) Make a convex bulge at the R angle 8 position to increase material tension and promote stamping;

[0047] (3) The R angle 8 forming position adds an outer tube position 7 to prevent the stamping part from moving and is accurately fixed;

[0048] (4) The pressing force of the internal stripping plate reduces the requirements for coordinated mold processing and improves demoulding efficiency.

[0049] The above only describes the preferred implementation methods of this patent and does not limit the scope of this patent. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings, directly or indirectly used in other related technical fields, falls within the scope of protection of this patent.

Claims

1. A stamping die structure for improving R-angle cracking, characterized in that: It includes a sheet metal part and a stamping die, the stamping die stamps and forms the stamping part, the R corner of the sheet metal part is provided with an R corner convex hull, the stamping die is provided with a convex hull forming die, a fine cutting die and a shaping die, the upper die and the lower die of the convex hull forming die are provided with a convex hull forming structure corresponding to the R corner, and the fine cutting die and the shaping die are provided with an outer tube position.

2. The stamping die structure for improving R-angle cracking according to claim 1, characterized in that: The convex hull forming structure is a convex hull punch and a convex hull insert.

3. The stamping die structure for improving R-angle cracking according to claim 1, characterized in that: The precision cutting die is provided with a precision cutting punch and a precision cutting insert, and is used for cutting sheet metal parts.

4. The stamping die structure for improving R-angle cracking according to claim 1, characterized in that: After the R-angle convex bulge of the sheet metal part is formed, the finishing punch of the finishing edge punching die punches out a 1.0 mm margin on the edge of the convex bulge.

5. The stamping die structure for improving R-angle cracking according to claim 1, characterized in that: The pressing force of the inner stripper plate of the fine trimming die is set to 490KG.

6. The stamping die structure for improving R-angle cracking according to claim 1, characterized in that: The lower die of the shaping die is provided with a forming plate and a forming insert for punching and integral forming.

7. The stamping die structure for improving R-angle cracking according to claim 1, characterized in that: The outer tube position positions and fixes the R angle position of the sheet metal part.

8. The stamping die structure for improving R-angle cracking according to claim 1, characterized in that: The sheet metal parts of the convex hull forming die, the fine trimming die and the shaping die are continuously and automatically transferred to the die processing position by a manipulator.

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