Investigation on the influence of dynamic characteristic on grinding residual stress

Abstract

The grinding residual stress plays a major role in deciding the workpiece’s surface quality, including the corrosion resistance, the fatigue property, and the reliability. Moreover, formation process of grinding residual stress accompanies with dynamic material’s removal action, which results in undulation of the mechanical parameters. The distribution of grinding residual stress is also affected by system dynamic characteristic accordingly. To this end, a sequentially coupled analytic model is established to study the influence of dynamic characteristic on the distribution of residual stress. Firstly, the grinding force with grits’ dynamic multiple interaction effects is calculated. Afterwards, the dynamic grinding thermal relaxation is figured out. According to the obtained dynamic characteristic of the machine tool, the undulation of workpiece’s residual stress distribution is subsequently studied at smaller depth of cut. It is found that the residual stress distribution mainly results from the dynamic characteristics of the machine tool, which is verified by the dynamic grinding experiments. As a result, the method can be considered an efficient reference to improve the consistency of the residual stress distribution for the workpiece in industrial grinding enterprises as well as engineering studies.