环件轧制有限元仿真过程中数控模型的开发及实现

Developing and Realization of the Control Model for the Ring Rolling FEM Simulation

环件轧制被广泛应用于生产无缝环件,目前基于有限元数值模拟环件轧制成形过程成为研究的热点。然而一般有限元软件不能求解含未知变量问题,这也使得如何在环件轧制有限元模型中模拟实时变化的复杂轧辊运动成为研究的难点。为此,本文首先分析了这些难点并给出了解决方案,然后基于通用有限元软件ANSYS/LS-DYNA,建立了RAW200/160-5型大型数控径轴向轧环机的三维仿真有限元模型,对某大型矩形截面环件进行了一个生产周期的虚拟轧制。仿真结果动态显示了环件实时扩展过程以及环件应力和位移云图,得到抱辊和锥辊在整个轧制过程中随着时间变化的位移曲线图,结果与实际生产过程吻合。从而验证了该数值模拟方法的有效性,可用来指导环件轧制实际生产。

The use of FEM to simulate the complex roller movement in real time represents an important issue which has been first analysed with solutions.a 3D model of Model RAW200/160-5 large scale NC radial-axial ring rolling mill has been created by finite element software ANSYS/LS DYNA,then a synchronous feedback self-modified model has been developed to control the multi-rolls for the simulation of a rectangle section ring rolling within one production cycle.The expanding state graph, stress and displacement contours as well as the displacement-time curves have been given out.Compared with the real rolling process,good agreements demonstrated the feasibility of this method in the virtual ring rolling simulation. It is recommended to utilize this simulation method to suggest potential improvements for the product design and the real rolling process.