论文部分内容阅读
Based on the superfluous triangle material wrinkle model,the no-wrinkle limit criterion of cylindrical cup multi-deep-drawing is calculated as the prediction and control of the wrinkle limit.According to fracture model,the no-fracture limit criterion of cylindrical cup multi-deep-drawing is calculated as the prediction and control of the fracture limit.Combining the no-wrinkle limit criterion with the no-fracture limit criterion,the no-wrinkle and no-fracture limit criterion and diagram on cylindrecal cup multi-deep-drawing are given as the prediction and control of both wrinkle and fracture limits.In accordance with this can determine the limit deep-drawing coefficient and minimum deep-drawing coefficient,and can choose the deep-drawing coefficient of multi-deep-drawing,blank-holder force and deformation force by optimization choice method.Theory calculation and test data are highly consistent,and suitable for no-flange multi-deep-drawing,flange multi-deep-drawing and rigid punch expanding.