斜轧中凸棱斜率对轧件心部应力影响  

Affect of Ridge Slope on the Stress in the Center of Workpiece in Skew Rolling

作　　者：康永强[1] 刘晋平[1] 胡正寰[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《北京科技大学学报》2002年第3期322-325,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助重点项目(No.50035010)

摘　　要：应用ＡＮＳＹＳ－ＤＹＮＡ有限元软件，对螺旋孔型斜轧轴类件进行轧制过程的模拟，得到轧件中间横截面的上应力分布曲线，同时分析了凸棱斜率对轧件中心部位应力变化的影响规律．结果认为，凸棱斜率对轧件中心部位主应力和等效应力有较大的影响，轧件心部的应力状态和积累是导致心部疏松的主要原因．Through the study of the process of skew rolling step-axis with the help of FEM software ANSYS-DYNA, the stress on the middle section of the workpiece and the infection of ridge slope to the stress in the center is known. The result indicates the principal stress and Von-Miss stress have great influence on the middle section of the workpiece, the state of stress and the accumulation of the stress are the main reason of the failure.

关 键 词：凸棱斜率 轧件心部应力 螺旋孔型斜轧 有限元 应力分布状态 应力积累 变形机理 

分 类 号：TG335.17[金属学及工艺—金属压力加工]