异形截面副车架液压成形工艺研究及过程优化  

Hydroforming study and process optimization of subframe with special section

作　　者：苏海波[1] 邓将华[2] SU Hai-bo;DENG Jiang-hua(Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China;School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]宝山钢铁股份有限公司,上海201999 [2]福州大学机械工程及自动化学院,福建福州350116

出　　处：《塑性工程学报》2019年第5期99-104,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51774097);2018福建省高等学校新世纪优秀人才支持计划

摘　　要：利用有限元仿真软件,对异形截面副车架零件弯管、预成形和液压成形全工序进行模拟,分析了零件成形过程中壁厚变化规律。通过优化弯管参数,改进了弯管结果;通过优化预成形形状,消除了预成形过程中"咬边"风险,通过优化液压成形加载曲线,获得了零件成形所需的工艺参数。在此基础上开展工艺试验,成功研制了副车架样件。对液压成形零件壁厚进行测量,获得了零件沿轴线典型截面的壁厚变化。研究结果表明,零件成形内压力为140 MPa,补料量60 mm时,可成形出满足要求的零件,零件最大壁厚2. 33 mm,增厚率为16. 5%,最小壁厚1. 62 mm,最大减薄率为-19%。The whole process of bending,pre-forming and hydroforming of the special section subframe was simulated by the finite element software,and the variation of wall thickness during the forming process was analyzed. The bend results were improved by optimizing the bending parameters,and the risk of undercutting in the preform process was eliminated by optimizing the preform shape. The loading curve of the hydroforming was optimized,and the process parameters for forming parts were obtained. On this basis,the process test was carried out and the subframe sample was successfully developed. The wall thickness of the hydroforming parts was measured,and the variation of the wall thickness along the axis was obtained. The results show that,when the forming pressure is 140 MPa and the forming feeding quantity is 60 mm,the parts meeting the requirements can be formed. After hydroforming,the maximum wall thickness of the part is2. 33 mm,the thickening rate is 16. 5%,the minimum wall thickness is 1. 62 mm and the thinning rate is-19%.

关 键 词：液压成形 弯管 预成形 副车架 过程优化 

分 类 号：TG306[金属学及工艺—金属压力加工]