Research Progress on the Influence of Crystalline Grain in Ultra-precision Cutting of Polycrystalline Material
Polycrystalline materials are extensively applied in ultra-precision cutting.In ultra-precision cutting,the processing parameters,e.g.,feed rate per revolution and cutting depth,approaches to the average grain size of work material.There are significant mechanical variations between different crystalline grains.Hence,the crystalline grain has great impact on ultra-precision cutting process.It has become the critical influencing factor of surface quality of polycrystalline materials.Around this issue,the influence of crystalline grain in ultra-precision cutting process is reviewed.First,the influence of crystalline grain on surface roughness is reviewed.The grain step phenomenon and its influencing factors are emphasized.Second,the influence of crystalline grain on cutting force is reviewed,and some cutting force models considering the influence of crystalline grain are introduced.Finally,the processing technologies to control the influence of crystalline grain in ultra-precision cutting are introduced.The development trend in the corresponding fields is analyzed.The above research progress is of great importance to improve the surface finish of polycrystalline materials in ultra-precision cutting.
ultra-precision cuttingpolycrystalline materialcrystalline grainsurface roughnesscutting force
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