Eccentric lap plate mechanism for ceramic balls lapping

Among the pieces are ceramic balls that are special because of the physical and mechanical properties that have been the industry's attention. Ceramic balls are produced by powder metallurgy way. Finally, by grinding, lapping and polishing processes is reached to surface smoothness, roundness and diameter of the desired. Since the required finishing process to ceramic finishing for surface quality and geometry accuracy of the desired is Time consuming and expensive, creating an economical finishing way is an important issue in the application of ceramic balls. In this article, a mechanism for ceramic balls lapping is proposed. Proposed mechanism consist of two lap plates. Lower lap plate has an eccentric v-shaped groove and placed on out of upper lap plate rotation center. Kinematic analysis of proposed mechanism has been done and lapping trajectory has been investigated on the ball surface. The results of kinematic analysis and lapping trajectory show that the proposed mechanism increases removal rate and roundness of the ball. In general, efficiency and productivity of balls lapping process will improve to achieve the desired surface smoothness and roundness. It can increase the speed of operation and reduce the process time by increasing removal rate.