Research Of The Residual Stress In Grinding Surface Of Glass Ceramic

Glass ceramic has good mechanical properties and chemical stability. It is widely used in many optical systems. As brittle material, it is often ground to remove the excess parts. The undeserved residual stress will generate in the grinding surface after the process and it will directly influence the strength and optical surface shape of the components, thereby affecting the service life circle and the performance of the system. Therefore, it is greatly necessary to study the residual stress generating in grinding process.In this paper, the relations between grinding parameters and the residual stress have been studied. Our main contributions are as follows:1. Due to theory of the fracture of brittle solids, we analyzed the material removal mechanism during grinding and proposed a hypothesis about the distribution of the residual stress in grinding surface. The heat generated during grinding has no influence on the generation of residual stress based on some theories.2. According to the formula of calculating grinding force, the relations between grinding parameters and grinding force could be obtained. By the finite element simulation, the relations between parameters and residual stress could be deduced.3. We used electroplated diamond wheel to grind ZERODUR○R glass ceramic. Four parameters were considered in the experiment and the results were matched to the earlier simulation. The shallower grinding depth, slower feed rate, faster rotating rate and smaller abrasive could cause smaller residual stress. All what we have done could be the reference for how to choose grinding parameters.