中文摘要：

以某类锥形航空发动机整流罩为研究对象,定性分析了充液成形过程中纬向应变的变化规律,针对锥形件底部易破裂及悬空区起皱的失效形式,采用多道次成形方法。结合数值模拟及试验验证,探究了中间构型对终成形悬空区起皱、起皱区域分布及零件壁厚分布的影响,确定优化后的中间构型成形工艺参数,最终成形出减薄小、表面质量好的合格零件。

英文摘要：

Taking certain types of conical aviation engine cowling as cases,the variation of latitude direction strain during the hydro-mechanical deep drawing was analyzed qualitatively.The method of multi-stage forming process was adopted to solve the bottom rupture and suspended area wrinkles of the conical parts.The middle configuration influence on suspended area wrinkles,wrinkling regional distribution and wall thickness distribution was investigated by combining the numerical simulation and experimental verification.The optimized parameters of the intermediate configuration forming process were determined.Finally,the parts with less thinning rate and good surface quality were formed successfully.