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分析了精密冲裁变形过程的特点,提出了精冲塑性变形过程的模式,推算了变形区的球形应力张量和应力偏量。解释了精冲过程中的若干现象。求出了压边圈V形环内角的最佳值,并通过了实验验证。
The characteristics of precision blanking deformation process are analyzed. The mode of fine blanking plastic deformation process is proposed. The spherical stress tensor and stress offset of the deformed zone are deduced. Explained the phenomenon of fine blanking process. The optimum value of the internal angle of the V-ring of blank holder was obtained and verified by experiment.