Analysis of contact-impact between ball and guide tube in ball screw
1. School of Mechatronics Engineering, Shandong Jianzhu University, Jinan, Shandong 250101, China; 2. College of Mechanical Engineering, University of Shandong, Jinan, Shandong 250061, China）
Abstract：In order to study contact-impact problems of re-circulating mechanism in ball screw, the dynamic model of contact-impact between the ball and return tube is presented based on the Hertz contact theory and collision theory. The dynamic equation is developed considering the ball and return tube＇s geometric arid operational factors. Based on the dynamic model, the relationship between the ball screw rotational speed, impingement angle, impact force and contact time is analyzed. The effects are investigated by using hollow ball and Si3N4ceramic material in order to reduce the impact force. Tbe model gives the optimum structure of ball screw drive.
2008, Vol. 29 
