Abstract:

：Taking single grain as the object, the movement characteristics of abrasive particles in the axial ultrasonic vibration are analyzed. On this basis, The grinding force is divided into two parts—the chip deformation force and friction force, and the effect of ultrasonic vibration on the chip deformation force and friction force is analyzed. In the chip deformation force aspect, the axial ultrasonic vibration changes the angle between the moving direction of the abrasive grain and the main cutting direction. In the friction force aspect, the axial ultrasonic vibration reduces the friction coefficient between the abrasive and the workpiece. Based on this, modeling on grinding force assisted with axial ultrasonic vibration is built. The ultrasonic vibration assisted grinding force experiment on 21NiCrMo5H is performed, constants of the model are determined, and the correctness of the theoretical model of grinding force is verified. Grinding force model built is an effective method of grinding force prediction on grinding assisted with axial ultrasonic vibration, and the understanding of the mechanism of axial ultrasonic vibration assisted grinding is of great significance.

Key words: friction force, grinding force modeling, prediction of grinding force, the chip deformation force, axial ultrasonic vibration