Friction Characteristics of Regulating Wheel in Centerless Grinding

摘要

In centerless grinding, the regulating wheel plays an essential role not only to support the workpiece but also to control the workpiece rotation. In order to ensure the stability in the workpiece rotation motion, a larger friction force between the workpiece and the regulating wheel is crucial which depends on the friction coefficient of regulating wheel. This paper deals with the investigation of the friction characteristics of regulating wheel under different truing/grinding conditions. For this purpose, an experimental apparatus capable of measuring the hysteresis characteristics of friction coefficient was constructed, and a series of measurement experiments were carried out. The obtained results showed that (1) the friction coefficient increases with the increasing slip ratio; (2) the truing conditions affect the friction coefficient significantly; (3) the friction coefficient is independent of the regulating wheel velocity but depends on the normal contact force.