锻压技术

大断面收缩率楔横轧的应力分析

英文标题：Stress analysis on wedge rolling of big cross-sectional area shrinkage

作者：施伟森邓子玉穆红红

单位：沈阳理工大学

关键词：楔横轧大断面收缩率应力裂纹

分类号：

出版年,卷(期):页码：2014,39(10):72-76

摘要：

利用Deform-3D有限元分析软件对大断面收缩率实心零件的楔横轧成形过程进行模拟，采用对称轧制一模双件，提高轧制效率。对轴向横截面的轴向应力以及中心横截面的切向应力分布规律进行研究。分析了不同轧制温度、轧辊转速对轧制中心温度的影响。结果表明，转速对中心温度影响显著,随着转速增加，轧制区变形金属的流动速度增大，变形功转化为热能，引起轧制区中心温度升高明显。利用点追踪分析中心横截面上的平均应力变化情况，中心横截面切应力方向发生改变的同时平均应力方向也发生改变。确定出轧制过程中在轧件半径中心至表面区域内最有可能产生裂纹。

The wedge rolling process of big cross-sectional area shrinkage solid part was simulated by deform-3D. The symmetric rolling of two-pieces in one mould was adopted，which improved the rolling efficiency. The distribution laws of axial stress in axial cross- sectional area and tangential stress of central cross-sectional area were researched. The influence of different rolling temperatures and rolling speeds on central temperature were analyzed. The results show that the speed has a great influence on the central temperature. The flow speed of deformed metal in rolling area increases with the increasing rolling speed，and the deformation work is transformed to heat energy, which causes the rising of central temperature significantly. The changing situations of mean stress in the central cross-sectional area were analyzed according to tracking points. The direction of tangential stress and mean stress are changed in the central cross-sectional area at same time. The results indicate that the area from the center of radius to the surface is the most likely area to product crack during cross wedge rolling.

基金项目：

施伟森（1989-），男，硕士研究生

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