铣削加工薄壁工件的变形仿真

Deformation Simulation for Thin-Walled Workpiece of Milling Process

以平板薄壁工件为研究对象,在Matlab平台实现其铣削加工过程的变形仿真。根据瞬时刚性力学模型将轴向铣刀离散化处理,得到微元的切削力,进而求得整个铣刀切削力,建立了铣削加工过程铣削力模型。利用理论计算和有限元分析方法,推导了平板薄壁工件有限元模型的变形控制方程。模拟了铣削过程中瞬态铣削力和变形量的相互作用,预测了工件在铣削力作用下的变形情况。通过实例验证了该仿真方法的可行性与有效性。

To study deformation of thin-walled workpiece in milling processes, simulation of the milling process on the MATLAB platform is performed based on a study of thin-wall workpiece. According to the transient cutting force model, the end mill is sliced into disks with small element, the cutting force of each is analyzed and modeled. Consequently, the total cutting force is calculated. It is analyzed and modeled. Consequently, the total cutting force is calculated. Combining the analytical method and the finite element method, a governing equation of deformation of the numerical model of thin-walled workpiece is derived. With the interaction between the transient cutting force and deformation during the milling process, prediction of the workpiece deformation with milling force is obtained. By analyzing the deformation simulation, feasibility and effectiveness of the proposed simulation approach is verified.