摘要
在大批量生产金属板料杯形零件时，深拉深成形是一项很重要的成形工艺。在拉深成形过程中，有许多可变化的因素直接影响着拉深的效果和拉深件的质量，如坯料形状、凸模和凹模的圆角半径以及坯料材料的可成形性能等。特别是在深拉成形过程中，为了获得最佳的产品质量，坯料和凹模的形状对拉深成形影响较大。文章对五种类形压料板和凹模型状的影响情况进行了重点试验和分析，并在拉深凸模和凹模的圆角半径保持不变的条件下，依据金属板料的拉深比（即拉深系数d／D的倒数，用β表示），测量压料板压力的分布情况。由试验研究得出，在深拉成形工艺过程中，坯料和凹模问的夹角α直接影响着压料板压力的分布和拉深比。
Deep drawing is an important process used for producing cups from sheet metal in large quantities. The deep drawing is affected by many process variables, such as blank shapes, profile radius of punch and die, formability of materials and so on. Especially, in order to obtain the optimal products in deep drawing process, blank and die shapes are very important formability factor. In this study, we investigated the effects of blank holder and die shapes, using five kinds of blank holder and die shapes. We measured the distribution at blank holder force （BHF） according to the ratio of sheet metal drawing, under the constant conditions of profile radius of punch and die. Deriving from the experimental studies, it is clarified that angle of blank and die at deep drawing process influence blank holder force distribution and ratio of drawing.
出处
《模具工程》
2007年第3期40-42,共3页
Mould &Die Project
