高速冲裁过程中的韧性断裂和断面质量研究进展

摘要/Abstract

摘要： 总结和评述了冲裁过程中均匀塑性流动形成光洁表面以及空穴长大引起断面撕裂的现象，从材料细观损伤角度阐明了高速冲裁韧性断裂机理及材料断裂参数的确定方法；综述了工艺参数对冲裁断面质量的影响规律、冲裁过程中的热效应以及冲裁断面的微观组织变化等的研究现状；最后对高速冲裁过程中的韧性断裂和断面质量的研究趋势进行了展望。

关键词: 高速冲裁, 韧性断裂, 冲裁断面质量, 温升效应, 绝热剪切带

Abstract: The smooth edge formed by shear crack propagation in plastic zone and premature fracture initialized by void growth and coalescence in blanking process were introduced, the mechanism of blanking ductile fracture and the determination of fracture parameters were explored with meso-damage theory. The influences of the processing parameters upon the blanking quality, the effects of material softening due to the heat generated during plastic work, and the microstructure of blanked surface were critically reviewed. Then the key problems for the development of high-speed blanking were discussed, and the viewpoints of future development of ductile fracture and blanked surface quality were proposed.

Key words: high-speed blanking, ductile fracture, blanked surface quality, thermal effect, adiabatic shear band

中图分类号:

TG386

陈明和, 胡道春, . 高速冲裁过程中的韧性断裂和断面质量研究进展[J]. 中国机械工程.

Chen Minghe, Hu Daochun, . Research Progresses of Ductile Fracture and Blanked Surface Quality in High-speed Blanking[J]. China Mechanical Engineering.

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