摘要
采用能量法导出圆杯无压边锥模拉深的皱曲强度，考虑了材料性 能，径向和周向弯曲作用，厚度变化及加工硬化效应。应用该强度预测无皱极限拉深比，与 Sowerby等人使用3种材料3种板厚作的无压边锥模拉深试验结果完全一致，最大相对误差不 超过8%。提出的研究方法同样适用于轴对称非直壁零件拉深凸凹模间悬空区的切向压缩失稳 分析。
The wrinkling strength of shell in cup deep-drawing process without blankholder through a conical die is deduced by using the well -known energy method. The formula mirrors the effect of material properties, radial and circumferential bending, varying thickness and work hardening on the wrinkling strength. Predicted limiting drawing ratios without wrinkling on the basis of the strength are completely in agreement with the experimental results of cup deep drawing without blankholder through a conical die, which are obtained by Sowerby et al. Who used three metals in three different sheet thicknesses. T heir maximum relative error is not more than eight percent. The study method is also suited to analyze cirumferential compressive instability in the area of hanging in the air between punch and die for axisymmetrical no-straight wall parts .
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2001年第9期75-79,共5页
Journal of Mechanical Engineering
基金
江苏省教育厅自然科学基金资助项目(99KJD46009)。
关键词
拉深
皱曲
弯曲
失稳
Deep-drawing Wrinkling Bending Instability
