High-strength steel sheet multi-teeth structure precision stamping forming die and method

Abstract

The invention provides a high-strength steel sheet multi-teeth structure precision stamping forming die and a high-strength steel sheet multi-teeth structure precision stamping forming method. The high-strength steel sheet multi-teeth structure precision stamping forming method includes applying a precision stamping technology to processing of a multi-teeth structure of a high-strength steel sheet, enabling the multi-teeth structure of the high-strength steel sheet to efficiently and rapidly form, and obtaining high residual compressive stress and low roughness at bottoms of teeth, does need surface strengthening for tooth profiles, obtains products good in consistency, and can significantly prolong structure fatigue life. The high-strength steel sheet multi-teeth structure precision stamping forming die particularly comprises an upper die portion and a lower die portion, wherein the upper die portion comprises an upper die seat, a blank holder and a male die, the lower die portion comprises a female die, a reverse pressing plate and a lower die seat, the reverse pressing plate is specially designed, material in a shearing area of the part is under three-dimensional pressure, a three-dimensional pressure stress state is formed, and therefore generation and extension of cracks are effectively inhibited. Due to the fact that the female die adopts tiny annular bulge contact stamping, stress in the inner tooth shearing area of the multi-teeth structure of the high-strength steel sheet can be improved, the shape of the material along a cutting edge of the female die is punched in pure shear mode, surface smoothness of inner teeth of the multi-teeth structure is greatly improved, and part quality is guaranteed.

Description

technical field [0001] The invention relates to a stamping forming method, in particular to a high-strength steel sheet multi-tooth structure precision stamping forming die method, which belongs to the technical field of precision stamping forming. Background technique [0002] Currently, in processing such as figure 1 When the high-strength steel sheet multi-tooth structure (thickness is less than or equal to 5mm, and the number of teeth is greater than or equal to 100) is shown, the tooth part is mainly processed by wire cutting / shaping processing, and the quality of tooth surface processing is not easy to guarantee, and there are prone to cross-section mutations and burrs. Due to the influence of factors such as wire jitter and transmission accuracy, the surface roughness and common normal error cannot meet the technical requirements, and the product consistency cannot be guaranteed. At the same time, wire cutting and gear shaping process process, the tooth part is gradu...

AI Technical Summary

Problems solved by technology

Due to the structural characteristics of thin sheet multi-tooth structure, low width-to-diameter ratio and large number of teeth, traditional precision stamping devices and methods are not applicable

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