Tool sharpness in precision micro cutting process

As to probe the factors affecting the roughness and surface properties of work piece in mirco-cutting machining process, according to the principle of energy balance, using the method of experiments combining with theoretical analysis, this paper investigates the effect of cutting edge radius on the unit cutting force, the cutting component forces ratio F_y/F_z, as well as the roughness and surface properties of the work-piece. Experimental results show that the value of tool cutting edge arc ρ has a significant impact on elastic-plastic deformationof the cutting area, and its influence on the surface quality of processing and precision is greater than commoncutting. The method of calculating the theoretical limits of the diamond tool cutting edge radius is feasible. Thevalue of 0. 0001 μm has some guiding significance for the developement of suitable cutting thickness to ensurethe normal cutting.