为了减小精冲件断面塌角,分析研究了塌角形成及其影响因素,设计了凹模刃口倒角。对影响精冲件断面塌角的凹模刃口倒角高度及倒角角度、凹凸模间隙三个因素进行了研究,并设计了考虑交互作用的正交试验,测量了精冲件塌角及光亮带比例。结果表明,在凹模倒角高度为0.05 mm、倒角角度5°、模具间隙0时,细薄精冲件的断面质量较好。 In order to reduce the cross-section of fine-blanking parts, the formation and influencing factors of slump angle were analyzed and studied, and the chamfer of die edge was designed. The three factors affecting the chamfer height, the chamfering angle and the clearance between the punch and the die were analyzed, and the orthogonal experiment considering the interaction was designed. Bright band ratio. The results show that when the chamfer height of the die is 0.05 mm, the chamfering angle is 5 °, and the die clearance is 0, the cross section quality of fine fine blanking parts is better.