42CrMo环件轧制成形的数值模拟与分析

Numerical simulation and analysis of rolling forming of 42CrMo rings

在Deform-3D平台下建立环件径-轴向轧制的三维有限元模型,结合理论研究和实际试验对42CrMo环件的轧制成形过程进行数值模拟与分析,并研究其轧制过程中的变形规律及成形情况,为轧制生产合格环件提供合理工艺。结果显示:42CrMo环件轧制成形的模拟结果和理论研究吻合,大变形区为环件外圈,内径扩大速度大于外径;等效应变值外圈大于内圈,中心最小,最大等效应变处于轴向端面的棱角处;环件温度外圈高于内圈,中心最高,端面棱角处最低;材料损伤最严重的部位为轴向端面,最大损伤值为0.645。对模拟结果进行理论验证和实际试验验证,环件尺寸的模拟值和理论值误差在5%以内,试验结果和模拟结果接近。

The three -dimensional finite element model of radial -axial ring rolling was established based on Deform -3 D platform. The ring rolling process of 42CrMo rings was numerical simulated and analyzed with the combined theoretical study and actual test, and the de- formation rule and forming of 42CrMo rings were researched, which provided reasonable process for the rolling production of qualified rings. The results show that the simulation results coincide with theoretical study. The large deformation region is the outer ring, and the expanding speed of inner diameter is faster than that of outer diameter. The equivalent strain of outer ring is greater than that of inner ring, and the minimum and maximum equivalent strain respectively appear in the middle of ring and at the edge angle of axial end face. The temperature of outer ring is higher than that of inner ring, and the highest and lowest temperature respectively occur in the middle of ring and at the edge angle of end face. The maximum damage of material appearing at the axial end face is 0. 645. The simulation results were verified by theoretical study and actual test, and the deviation of simulation and theoretical values of ring dimension is less than 5%, which indicates that the test results are close to simulation results.