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为了控制在多轴机床上对圆弧曲面进行精确的铣削加工,建立了铣削力解析模型。在加工过程中为了保证加工的精度,铣刀与被加工表面之间保持垂直,这就造成了瞬时未变形切屑厚度在铣刀轴线方向上是一个变量。因此圆弧曲面铣削加工是一个动态切削过程。将铣刀沿轴线方向划分成若干微段,每个微段的切削看作一个稳态切削,根据已有的稳态过程铣削力模型,可以得到在每个微段上单位铣削力模型,然后沿轴线方向积分得到圆弧曲面铣削加工铣削力解析模型。通过实验,验证了该模型的有效性。
In order to control the precise milling of arc surface on multi-axis machine tools, the analytical model of milling force was established. In the process of machining in order to ensure the accuracy of processing, milling cutter and the surface to be processed perpendicular to the vertical, which resulted in the instantaneous undeformed chip thickness in the axial direction of the cutter is a variable. Therefore, the arc surface milling is a dynamic cutting process. The milling cutter is divided into several micro-sections along the axial direction. The cutting of each micro-section is regarded as a steady-state cutting. Based on the existing steady state milling force model, the unit milling force model can be obtained on each micro-section and then Integral along the axial direction to obtain circular arc milling surface milling milling force analytical model. Through experiments, the validity of the model is verified.