In order to predict the milling forces in the process of peripheral milling of complex curved surface with high efficiency and precision,this paper make a description on the workpiece contour and tool path through parametric curved surface.New methods are proposed to calculate actual feed per tooth and actual radial cutting depth,and calculation equations are derived.And then,a model for instantaneous milling force is established.Through simulation,this paper prove that curvature has little or even no effect on feed per tooth.Curvature mainly influences actual radial cutting depth.Also,when tool diameter is greater,curvature has more significant influences on actual radial cutting depth.Then,a method to predict milling force based on actual radial cutting depth is proposed.Moreover,this paper make a prediction on the milling force in peripheral milling of complex curved surface and conducted tests for validation.The predicted and experimental results have a good consistency both in variation tendency and amplitude,and time cost of simulation is significantly reduced,which show that the presented method has high precision and calculation efficiency.
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