盘形件两工步对称增厚旋压工艺  

A two-step symmetrical thickening spinning process for disk-shaped part

作　　者：刘发美 金俊松[1] 李斌 高畅 张蕾 王新云[1] Liu Famei;Jin Junsong;Li Bin;Gao Chang;Zhang Lei;Wang Xinyun(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《锻压技术》2023年第3期43-53,共11页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(52175319)

摘　　要：对称增厚旋压是一种针对薄辐板厚轮缘类盘形件的特种旋压技术,利用有限元模拟研究了两工步对称增厚旋压过程中坯料的变形规律、成形特点和缺陷的产生,以及各工艺参数对成形的影响。结果表明:摩擦因数μ、旋轮进给速度v以及坯料旋转速度ω对成形过程影响较小。在第1工步中,旋轮槽底宽度h、旋轮凹槽倾角α以及坯料长厚比γ对成形影响显著,随着旋轮槽底宽度h和旋轮凹槽倾角α的增大以及坯料长厚比γ越大,坯料越容易失稳形成缺陷;在第2工步中,旋轮槽底宽度h以及坯料的初始形状对成形影响显著,旋轮槽底圆角半径R能够改善坯料外边缘的应力状态,且R越大改善效果越明显。Symmetrical thickening spinning is a special spinning process for disc-shaped parts with thin spoke and thick rim.Therefore,the deformation laws and forming characteristics of blank,the cause of defects and the influences of process parameters on forming in the two-step symmetrical thickening spinning process were studied by finite element simulation.The results show that friction coefficientμu,feeding speed u of the roller and rotation speed o of blank have little effect on the forming process,while groove bottom width of roller h,inclination angleαof roller groove and length to thickness ratio of blank have sigmificant effect on the forming in the first step.With the increasing of groove bottom width of roller h and inclination angleαof roller as well as length to thickness ratio of blank,the blank is more prone to lose stability and form defects.Furthermore,in the second step,the groove bottom width h of roller and the initial shape of blank have significont effect on the forming.Meantime,the fillet radius R at the bottom of roller groove can improve the stress state of the outer edge of blank,and the larger the R is,the more obvious the improvement effect is.

关 键 词：盘形件 对称增厚旋压 旋轮槽底宽度 旋轮凹槽倾角 圆角半径 

分 类 号：TG306[金属学及工艺—金属压力加工]