大膨胀率薄壁管复合内高压成形工艺研究  

Composite internal high pressure forming process of thin-walled tube with large expansion ratio

作　　者：黄丽容[1] 张池 刘文 王春鸽 罗开臣 叶鑫宇 于艳东 林立 赵军[4] HUANG Li-rong;ZHANG Chi;LIU Wen;WANG Chun-ge;LUO Kai-chen;YE Xin-yu;YU Yan-dong;LIN Li;ZHAO Jun(School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Mechanical and Energy Engineering,Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,China;Ningbo Vorias Machinery Technology Co.,Ltd.,Ningbo 315100,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]江西理工大学机电工程学院,江西赣州341000 [2]浙江大学宁波理工学院机电与能源工程学院,浙江宁波315100 [3]宁波市沃瑞斯机械科技有限公司,浙江宁波315100 [4]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《塑性工程学报》2020年第8期52-59,共8页Journal of Plasticity Engineering

基　　金：江西省自然科学基金资助项目(20171BAB206030);浙江省自然科学基金青年基金资助项目(LQ17E050004);江西省教育厅科学技术研究项目(GJJ180422);浙江省公益技术研究计划项目(GG20E050011);奉化工业科研攻关项目(20186207)。

摘　　要：针对大膨胀率空心薄壁件难加工、壁厚减薄严重和零件贴模不到位等问题,以某型号汽车消音器外管为研究对象,拟定了直接胀形和复合内高压成形两种加工工艺。基于数值模拟分析,对零件的成形过程进行研究,确定复合内高压成形为较优方案,并分析了补料量、成形压力和加载路径对成形后管件质量的影响。根据数值模拟确定的工艺参数,进行复合内高压成形试验,测量了零件截面的壁厚分布,并将其与模拟结果进行比较。结果表明,模拟结果和试验结果基本吻合,均在补料量为12 mm、成形压力为90 MPa、加载路径为B时成形出合格零件,两者的壁厚分布整体变化趋势一致,验证了新工艺的可行性和数值模型的可靠性。Aiming at the problems such as the difficulty in processing,the serious thinning of wall thickness and the failure in fitting die for hollow thin-walled parts with large expansion ratio,taking the muffler outer tube of a certain type of automobile as research object,two processes,viz.,direct bulging and composite internal high pressure forming,were developed. Based on the numerical simulation analysis,the forming processes of the parts were studied,and the composite internal high pressure forming was determined as the better scheme.The influences of feeding amount,forming pressure and loading path on the quality of the formed pipe were analyzed. According to the process parameters determined by the numerical simulation,the composite internal high pressure forming test was carried out,and the wall thickness distribution of the parts section was measured and compared with the simulation results. The results show that the simulation results are basically consistent with the test results. The qualified parts are formed when the feeding amount is 12 mm,the forming pressure is 90 MPa and the loading path is B. The overall variation trend of the wall thickness distribution between simulation and test is consistent,which verifies the feasibility of the new process and the reliability of the numerical model.

关 键 词：大膨胀率 薄壁管 复合内高压 加载路径 

分 类 号：TG306[金属学及工艺—金属压力加工]