研究了超精密切削时，单晶金刚石刀具与工件间的摩擦系数、刀具锋锐度、切削厚度等对切削变形系数、切削力及加工表面质量的影响。作者认为在超精密切削时，要提烹加工表面质量，优选金刚石刀具的晶面方向、提高金刚石刀具的锋锐度是十分重要的，在超精密切削单晶材料时，工件晶面的选择也是十分重要的。 The effects of friction coefficient, tool sharpness and cutting thickness on cutting deformation coefficient, cutting force and machined surface quality during ultra-precision cutting were studied. The authors believe that in the ultra-precision cutting, it is very important to improve the surface quality, optimize the crystal face orientation of the diamond tool and improve the sharpness of the diamond tool. In the case of ultra-precision cutting of single crystal material, the choice of the crystal face of the workpiece is also Very important.