Effect of asymmetric microtexture of internal structure on cutting performance of YT15 carbide tool and its derivative cutting
To study the cutting performance of the internal structure asymmetric microtexture on the tool and its influence on the derivative cutting,based on the Johnson-Cook model,the finite element was used to simulate and analyze the cutting 45# steel of Non-woven Tool(NT),Forward asymmetric microtexture Tool(FT),and Reverse asymmetric microtexture Tool(RT),and the corresponding cutting experiments were carried out,and the cutting force,cutting temperature,chip morphology,derivative cutting and tool wear of NT,FT,and RT were compared and analyzed.it is found that the cutting performance of internal structure asym-metric microtexture tools is better than that of non-woven tools,but the existence of texture will also induce derivative cutting phe-nomenon,which will have a certain negative impact on cutting performance and aggravate tool wear.The average main cutting forces of NT,RT,and FT are 601.9,196.4 and 419.1 N,respectively,and the cutting force of microtexture tools is reduced by a-bout 30.4％～67.4％compared with non-woven tools.The results show that the introduction of microtexture is conducive to re-ducing the shear angle,reducing the cutting force,improving the temperature distribution of the tooltip,reducing the adhesion of chips,and improving the cutting stability.However,the microtexture-induced derivative cutting will aggravate the wear of the cut-ter surface near the microtexture,which will affect the cutting temperature to a certain extent,increase the cutting force,and the coupling effect of microtexture and derivative cutting makes the cutting performance of RT greater than that of FT.
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