Study on grinding force of grind-hardening based on orthogonal experimental method

On the basis of orthogonal experiment method, the grind-hardening of 65Mn steel had been carried out on a conventional surface grinder with alumina grinding wheel, the influence of depth of cut a_p, table speed v_w, grinding mode g_m, and interaction between depth of cut and table speed av on grinding force were investigated. The results show that, all factors influencing the mean value of tangential grinding force F_mt are insignificant factor and av can be regarded as abandoned factor, in addition the significance ratio from most to least as followed: v_w >;a_p >; g_m>; av; all factors influencing the mean value of normal grinding force F_mn are significant factor, in addition the significance ratio from most to least as followed: a_p >; v_w >; g_m >; av. Relatively smaller grinding force and completely grind-hardened layer workpiece can be obtained when using grinding conditions that the a_p = 0.2mm, the v_w = 0.2m/min, and the g_m =up grinding + down grinding in practical applications.