铝合金半球形件反向粘性介质压力成形及有限元分析  

Counter viscous pressure forming and finite element analysis of aluminum alloy hemispherical parts

作　　者：高铁军[1,2] 李少华 汪凯旋 刘凌云 GAO Tie-jun;LI Shao-hua;WANG Kai-xuan;LIU Ling-yun(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Shenyang 110136,China;AECC Shenyang Liming Aero Engine Co.,Ltd.,Shenyang 110043,China)

机构地区：[1]沈阳航空航天大学航空宇航学院,辽宁沈阳110136 [2]沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,辽宁沈阳110136 [3]中国航发沈阳黎明航空发动机有限责任公司,辽宁沈阳110043

出　　处：《塑性工程学报》2022年第2期8-13,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52075347);辽宁省教育厅高等学校基本科研面上项目(LJKZ0192);沈阳市中青年创新人才计划(RC180189)。

摘　　要：针对铝合金半球形零件在成形时容易出现拉裂、起皱等问题,首次提出采用反向粘性介质压力成形方法进行此类零件的成形,并对其成形过程进行了有限元仿真分析和实验验证,得到不同反向粘性介质压力下试件的几何形状和壁厚变化规律以及粘性介质压力场的分布规律。结果表明,坯料在较高反向粘性介质压力作用下"反向拉深",形成了预反成形效果,改善了坯料的变形均匀性及壁厚分布规律,最小壁厚由凸模中心区域逐渐向试件直壁区域转移;同时,粘性介质作用于坯料形成的非均匀压力场以及界面摩擦效应也可以有效改善坯料的受力状态,在反向粘性介质压力为12.5 MPa时成形出了满足要求的零件。In view of the problem that aluminum alloy hemispherical parts were prone to crack and wrinkle during the forming, a counter viscous pressure forming method was proposed for the first time, and the finite element simulation analysis and experimental verification of the forming process were carried out. The geometric shape and the law of wall thickness variation of parts and the distribution of the viscous pressure field with different counter viscous pressures were obtained. The results show that with the higher counter viscous pressure, the “counter drawing” of the blank causes a pre-reverse forming effect, which improves the deformation uniformity of blank and the wall thickness distribution law, and the minimum wall thickness gradually deviates from the central area to the sidewall area of the part. At the same time, the non-uniform pressure field and the interface friction effect formed by the viscous acting on the blank can also effectively improve the pressure state of blank. When the counter viscous pressure is 12.5 MPa, the part that meets the requirements is formed.

关 键 词：铝合金 半球形件 反向粘性介质压力成形 有限元 

分 类 号：TG306[金属学及工艺—金属压力加工]