Optimizing the geometric parameters of cutting edge for rough machining Fe-Cr-Ni stainless steel

A two-dimensional finite element (FE) model of orthogonal cutting Fe-Cr-Ni stainless steel has been built with finite element software AdvantEdge to optimize the geometric parameters of cutting edge. The effect of these parameters on stress and temperature has been analyzed. The optimizing methodology of cutting edge geometric parameters has been proposed. Then, the geometric parameters of cutting edge have been optimized based on FE simulated results. It finds that, with the increase of rake angle (0°~10°) and cutting edge radius (40~80 μm), there is a minimum value of the tool stress. Given relief angle is 7°, the optimal rake angle for rough machining Fe-Cr-Ni stainless steel is 6°, and the optimal cutting edge radius is 60 μm. The cutting parameters have less influence on the optimized results in rough machining Fe-Cr-Ni stainless steel. Basically, for rough machining Fe-Cr-Ni stainless steel, the geometric parameters of cutting edge have little influence on the temperature, but influence the stress greatly. Keeping the equal material removal rate, larger cutting speed and smaller feed rate can obviously reduce the stress and the highest temperature in the tools.