プランジ研削における半径比の影響に関する研究

Abstract

In order to determine the optimum radius and the limit of usable radius of grinding wheels in cylindrical plunge grinding, effects of the radius ratio and the wheel radius upon grinding forces, wheel wear rate and surface roughness are experimentally investigated. Main conclusions obtained are as follows : (1) Grinding forces increase rapidly under constant rotation ratio, but hardly increase under constant speed ratio with increasing radius ratio. (2) Even though all of cutting conditions of each grain are held constant, grinding forces increase with an increase of the wheel radius. On the other hand, grinding forces are held almost constant under constant speed ratio and then constant number of wheel rotation. (3) The optimum radius of grinding wheels for each grinding result depends on grinding conditions and the limit of usable radius of grinding wheels becomes maximum under variable relative speed and constant speed ratio from the viewpoint of grinding forces.