Influence on Cutting Force and Surface Roughness of 18CrNiMo7-6 Steel Turning Parameters
In order to explore the influence of turning process parameters on the cutting force and surface roughness of 18CrNiMo7-6 steel standard fatigue sample at different positions,CAK4085 CNC lathe is used to carry out single factor test on three process parameters:spindle speed n,back cutting depth a and feed speed vf.The results show that the influence of cutting parameters on cutting force and surface roughness is the same for the arc segment and the standard segment of the standard sample.Back cutting depth ap has the greatest influence on cutting force,and vf is the second influencing factor,the spindle speed n has the least effect.Among the three fitting indices of cutting force components,the fitting error of the main cutting force is 5.25％and the fitting error of the back force is 2.29％,which is relatively small.The biggest factor affecting the surface roughness Ra is the feed speed and it is increased with the increasing of vf.The surface roughness Ra of the arc cut in segment is higher than that of the cut out segment.The better processing parameters for fatigue samples are as follows:n=1000 r/min,vf=80 mm/min,ap=0.3mm.The research results can provide reference for the formulation of fatigue sample turning process.
万方数据
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