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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。
Deform-3D finite element analysis software was used to simulate the cross-wedge rolling process of the solid part with large reduction of area and the symmetrical rolling of the mold and the double part to improve the rolling efficiency. The axial stress of the axial cross section and the tangential stress distribution of the central cross section were studied. The influence of different rolling temperature and roll speed on rolling center temperature was analyzed. The results show that the rotation speed has a significant influence on the center temperature. With the increase of the rotation speed, the flow velocity of the deformed metal in the rolling zone increases and the deformation work turns into heat energy, which causes the central temperature of the rolling zone to increase obviously. Using point-tracking analysis of the average stress changes in the cross-section of the center, the direction of shear stress at the center cross-section changes while the average stress direction also changes. Determine the rolling process in the rolling radius of the center to the surface area is most likely to crack.