带纵向外筋薄壁筒形件复合流动成形数值模拟与工艺优化  

Numerical simulation and process optimization of composite flow forming for thin-walled cylinder with longitudinal external ribs

作　　者：毛华杰[1,2] 刘亚鹏 邓加东 Mao Huajie;Liu Yapeng;Deng Jiadong(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Engineering Research Center for Green Precision Material Forming,Wuhan 430070,China;School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]湖北省材料绿色精密成形工程技术研究中心,湖北武汉430070 [3]武汉理工大学汽车工程学院,湖北武汉430070

出　　处：《锻压技术》2020年第4期93-99,共7页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51805391);教育部创新团队发展计划项目(No.IRT_17R83);中央高校基本科研业务费专项资金资助(2019IVB021)。

摘　　要：采用传统的切削、挤压方法加工外表面带纵向外筋薄壁筒形件,存在着材料利用率较低、成本较高的问题,因此,提出了一种新的复合流动成形工艺。利用有限元分析软件,研究了预成形压下量、道次减薄量分配比以及滚珠直径等工艺参数对外筋成形效果的影响规律。研究发现:预成形压下量越大,外筋填充效果越好;不同阶段中,滚珠直径对外筋填充效果影响不同;采用两道次成形时,可以显著降低成形过程中的轴向旋压力。以外筋填充率和旋压力作为优化指标,通过正交试验,获得外表面带纵向外筋薄壁筒形件复合流动成形的最佳工艺方案,选取最佳工艺方案,通过试验验证了复合流动成形工艺的可行性,为此类构件的高效、低耗生产提供了理论设计依据。The traditional cutting and extrusion methods for processing thin-walled cylinder with longitudinal external ribs have the problems of low material utilization and high cost respectively.So a new composite flow forming process technique was proposed.By using finite element analysis software,the influence laws of process parameters such as pre-forming reduction,pass thickness reduction distribution ratio and ball diameter on forming effect of external ribs were studied.The result shows that the bigger the pre-forming reduction is,the better the filling effect of external ribs is.The influences of ball diameter on filling effect of ribs are different in different stages.When using two passes,the axial spinning pressure during the process can be significantly cut down.The filling rate of external ribs and spinning pressure were taken as indexes.The best process scheme of composite flow forming for thin-walled cylinder parts with longitudinal external ribs was obtained by orthogonal test.The optimal process scheme was selected and the feasibility of the composite flow forming process was verified by experiments,which provided a theoretical design basis for the efficient and low-cost production of such components.

关 键 词：复合流动成形 纵向外筋 薄壁筒形件 旋压力 正交优化 

分 类 号：TG306[金属学及工艺—金属压力加工]