Abstract:In order to study the influence of microgroove texture on the cutting force in the cutting process and the machined surface roughness, a microgroove texture with the width of 32.6 μm which parallelled to the main cutting edge was prepared on the rake face of the polycrystalline CBN (PCBN) cutter. The hardened steel GCr15 was cut at the spindle speed of 450, 500 and 600 r/min by using the microgrooved cutter and nontextured cutter respectively,the cutting force and the machined surface roughness were analyzed. The experimental results show that by using the microgroove, the cutting performance of the tool is improved, and the main cutting force, feed force and cutting depth force are all less than those of the nontextured tool; both feed force and cutting depth force increase with the increase of spindle speed, and the main cutting force decreases first and then increases; the surface roughness of the workpiece machined by using the microgroove tool is larger than that of nontexture tool, which indicates that the microgrooved is not conducive to obtaining the workpiece with good surface quality; with the increase of the spindle speed, the surface roughness of the workpiece machined by using the microgroove tool and the nontexture tool decreases.