Research on the Stability of the Machining Process Based on the Dynamic Cutting Force Coefficient

doi:10.3901/JME.2017.17.193

Abstract

Abstract: The cutting force coefficient changes with the cutting parameters during cutting process. If the cutting force coefficient is assumed to be constant during the cutting force simulation and the stability boundary drawing process, which makes the prediction error larger. In view of the above-mentioned problems, 0Cr13 stainless steel which is the processing material of the impact bucket, is taken as the research object. On the basis of the milling force model, the dynamic cutting force coefficient model with the cutting parameters is obtained by orthogonal test, average milling force method and partial least squares method. The main factors that affect the cutting force coefficient K_t, K_r and K_a are the feed rate, the radial width and the feed rate. Based on the dynamic cutting force coefficient, the cutting force and stability of the milling process are studied. Cutting force simulation and stability boundary, which are obtained by using constant cutting force coefficient and dynamic cutting force coefficient, compared with cutting test, the simulation results show that the dynamic cutting force coefficients is more close to the actual processing results, to provide theoretical support for the optimization of Pelton turbine bucket plunge milling process.

Key words: dynamic cutting force coefficient, impulse turbine, milling force, plunge milling, stability

CLC Number:

TG506

YUE Caixu, GAO Haining, LIU Xianli. Research on the Stability of the Machining Process Based on the Dynamic Cutting Force Coefficient[J]. Journal of Mechanical Engineering, 2017, 53(17): 193-201.

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