Abstract：In milling process of splicing dies, due to the influence of different hardness splicing of workpiece, milling force changes suddenly and vibration intensifies when milling passes through splice seam to reduce the workpiece surface quality and the service life of the tool.Here, firstly, a scrap thickness model of a splicing seam area was established to analyze the relation between scrap thickness and milling force coefficient.Secondly, the full discretization method based on Runge-Kutta algorithm was used to solve the milling dynamic equation.Due to instantaneous milling force coefficient changing with variation of cutting parameters, multiple stability prediction curves for upper and lower limits were obtained with this method.The minimum envelope method was used to form the banded zone of the upper and lower limits as the final stable boundary.Finally, the time domain and frequency domain analyses were used to verify the correctness of milling stability prediction curves.It was shown that the proposed stability prediction model can provide theoretical parameters for milling process of large automobile panels, and solve vibration problems caused by impact load at milling splicing seams.
岳彩旭1，郝小乐2，王彦武1，高海宁1，马晶1，冯磊1. 基于瞬时铣削力系数法的拼接模具铣削稳定性研究[J]. 振动与冲击, 2019, 38(21): 71-79.
YUE Caixu1, HAO Xiaole2, WANG Yanwu1, GAO Haining1, MA Jing1, FENG Lei1. Milling stability of splicing dies based on instantaneous milling force coefficient method. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(21): 71-79.
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