Study of inspection technique for precision component on indexing table

Abstract

This work presents inspection method for component of indexing table. The indexing table employs a vee and 3 balls kinematic location system. The 6 points contact kinematic design concept of ball and vee groove was used, because the ball and vee groove system can attain good repeatability and has good rigidity. The vee plays an important role as the indexing angle and locking mechanism. Also eccentricity is an important factor as alignment between the rotation center of the rotary table. So, the concentricity between the center of the vee plate and the center of the rotary table is required to be as close as possible to make an accurate vee plate. The indexing table uses the kinematic design concept of vees and balls. But contact stress in the vee is often very high, so the plastic deformation could occur on the vee due to the loaded balls. The elastic deformation of cam shaft is described in this paper.