Sawtooth blanking die
By optimizing the blanking process of drawn stamping parts through the serrated blanking die, the problem of low material utilization is solved, and the material cost is reduced and the production efficiency is improved.
Patent Information
- Application Number
- CN202422930681.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-28
AI Technical Summary
In the existing technology, the material utilization rate of drawn stamping parts has not yet reached the optimal level, resulting in high material costs, and the optimization space for cutting rectangular sheets is limited and cannot be further improved.
A serrated blanking die is used to form a serrated cutting track through the upper and lower die cutters to cut out serrated edge pieces, so that the front and rear edges of adjacent pieces can be buckled together without waste, reducing raw material waste and improving material utilization.
Without affecting the drawing process, the serrated blanking die increases material utilization by about 15% and reduces material costs.
Smart Images
Figure CN223476062U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts processing, specifically to a serrated blanking die. Background Technology
[0002] In automotive parts manufacturing, drawn stamping is a common process, primarily used to manufacture parts with complex shapes and considerable depth. The drawing process involves stretching sheet metal into a die to obtain the desired part shape. Optimizing raw material preparation for drawn stamping is crucial. This optimization not only improves material utilization and reduces costs but also enhances production efficiency and product quality. By optimizing die design and minimizing waste, material utilization can be significantly improved. Material cost is one of the major costs in the manufacturing process; improving material utilization directly reduces production costs.
[0003] In current mass production projects, optimizing material utilization for drawn stamped parts can improve profits. However, the materials for general mass-produced drawn parts have already been optimized. Currently, a type of sheet material has been optimized to use rectangular sheet material. Conventional material optimization can no longer further improve material utilization. After a long period of production, it has been found that material costs are still high and there is still room for further optimization and reduction. Utility Model Content
[0004] The present invention aims to provide a serrated blanking die to optimize the blanking of the above-mentioned drawn stamping sheets, further improve material utilization, and reduce material costs.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sawtooth blanking die, comprising an upper die cutter and a lower die cutter. The upper die cutter is in the shape of a long strip and has fifteen rectangular toothed grooves arranged side by side on the left side. The lower die cutter is in the shape of a long strip and has sixteen rectangular toothed grooves arranged side by side on the right side. Rectangular upper cutting teeth are formed between adjacent toothed grooves on the upper die cutter, and rectangular lower cutting teeth are formed between adjacent toothed grooves on the lower die cutter. The upper cutting teeth have the same shape as the toothed grooves on the lower die cutter, and the lower cutting teeth have the same shape as the toothed grooves on the upper die cutter.
[0006] Preferably, as an improvement, the upper die cutter moves vertically relative to the lower die cutter, causing the upper cutting teeth to move vertically in and out of the tooth groove of the lower die cutter, and the lateral distance between the upper cutting teeth and the side wall of the upper tooth groove of the lower die cutter is 0.15-0.35mm.
[0007] Preferably, as an improvement, both the upper die cutter and the lower die cutter are composed of multiple toothed racks arranged side by side.
[0008] Preferably, as an improvement, the length of the upper cutting tooth is 30mm.
[0009] Preferably, as an improvement, the tooth tips and roots of both the upper and lower cutting teeth are rounded.
[0010] The principle and advantages of this solution are as follows: In practical applications, the existing blanking die uses a straight-blade cutter, which cuts out rectangular sheets. After drawing and stamping, these sheets are formed into rectangular thin-plate workpieces. However, there is a lot of flash and excess material on all four sides of the workpiece. With this solution, the upper and lower die cutters form a sawtooth-shaped punching trajectory, and the front and back edges of the cut sheets are sawtooth edges. The sawtooth edges of adjacent sheets can interlock to achieve waste-free layout. In the past, it was necessary to reserve a margin between the front and back edges of adjacent rectangular sheets. With the sawtooth structure, the margin can be shared between the front and back edges of adjacent sheets, thereby reducing the waste of raw materials caused by the reserved margin. While ensuring that the requirements of the drawing process for the pressure surface are not affected, the weight of the sheet is reduced, and the material utilization rate is increased by about 15%. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the upper die-cutting blade in an embodiment of this utility model.
[0012] Figure 2 This is a schematic diagram of the structure of the die-cutting blade in an embodiment of the present invention.
[0013] Figure 3 This is a comparison diagram of the processed material sheet of this utility model embodiment and the material sheet of the prior art. Detailed Implementation
[0014] The following detailed description illustrates the specific implementation method:
[0015] The reference numerals in the accompanying drawings include: upper die cutter 1, upper cutting tooth 2, lower die cutter 3, and lower cutting tooth 4.
[0016] The basic implementation examples are as follows: Figure 1 , Figure 2 The diagram shows a serrated blanking die, comprising an upper die cutter 1 and a lower die cutter 3. The upper die cutter 1 is elongated and has fifteen rectangular toothed grooves arranged side by side on its left side. The lower die cutter 3 is elongated and has sixteen rectangular toothed grooves arranged side by side on its right side. Rectangular upper teeth 2 are formed between adjacent toothed grooves on the upper die cutter 1, and rectangular lower teeth 4 are formed between adjacent toothed grooves on the lower die cutter 3. The upper teeth 2 and the toothed grooves on the lower die cutter 3 have the same shape, and the lower teeth 4 and the toothed grooves on the upper die cutter 3 have the same shape. Both the upper die cutter 1 and the lower die cutter 3 are composed of multiple toothed strips arranged side by side, and the toothed strips are bolted to the blanking equipment.
[0017] The upper die cutter 1 moves vertically relative to the lower die cutter 3, causing the upper cutting tooth 2 to move vertically in and out of the tooth groove of the lower die cutter 3. The lateral distance between the upper cutting tooth 2 and the side wall of the upper tooth groove of the lower die cutter 3 is 0.15-0.35mm. The length of the upper cutting tooth 2 is 30mm, and the tooth tip and tooth root of both the upper cutting tooth 2 and the lower cutting tooth 4 are rounded.
[0018] The specific implementation process is as follows: In practical applications, the existing technology uses a straight-blade cutter for blanking, and the cut material is a rectangular piece. Figure 3 As shown, taking a 190*640mm sheet as an example, when blanking, a margin needs to be reserved between the front and back edges of adjacent rectangular sheets. After drawing and stamping, it is formed into a rectangular thin plate workpiece, but there is a lot of flash on the four sides of the workpiece. After adopting this solution, the upper die cutter 1 and the lower die cutter 3 form a sawtooth punching trajectory. The front and back edges of the cut sheet are sawtooth edges, and the sawtooth edges of the front and back edges of adjacent sheets can be interlocked to achieve zero-waste layout. After adopting the sawtooth structure, the margin space between the front and back edges of adjacent sheets can be shared, thereby reducing the waste of raw materials caused by the reserved margin. The blanking step distance is reduced from the original 190mm to 160mm. While ensuring that the requirements of the blanking process for the pressure surface are not affected, the weight of the sheet is reduced, and the material utilization rate is increased by about 15%, which has a significant cost reduction effect on mass-produced drawn parts.
[0019] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A serrated blanking die, characterized in that: It includes an upper die cutter and a lower die cutter. The upper die cutter is long and has fifteen rectangular toothed grooves arranged side by side on the left side. The lower die cutter is long and has sixteen rectangular toothed grooves arranged side by side on the right side. Rectangular upper teeth are formed between adjacent toothed grooves on the upper die cutter, and rectangular lower teeth are formed between adjacent toothed grooves on the lower die cutter. The upper teeth have the same shape as the toothed grooves on the lower die cutter, and the lower teeth have the same shape as the toothed grooves on the upper die cutter.
2. The serrated blanking die according to claim 1, characterized in that: The upper die cutter moves vertically relative to the lower die cutter, causing the upper cutting teeth to move vertically in and out of the tooth groove of the lower die cutter. The lateral distance between the upper cutting teeth and the side wall of the upper tooth groove of the lower die cutter is 0.15-0.35mm.
3. A serrated blanking die according to claim 2, characterized in that: Both the upper and lower die cutters consist of multiple toothed blades arranged side by side.
4. A serrated blanking die according to claim 3, characterized in that: The length of the upper cutting tooth is 30mm.