Research on the Impact between Balls and Re-Circulating Mechanism of Ball Screws

Abstract

A Mechanical model of impact and contact between the ball and re-circulating mechanism in ball screw was brought forward according to the Hertz contact model and classical impact theory, along with the joint relationship of re-circulating mechanism and nut taken into account. Then the formula of the impact force and contact time was induced, which the elastic coefficient of restitution was considering in contact time calculation. Moreover, a special test unit was designed for contact time measurement and the contact time was measured. The result indicates that the new model proposed in this paper is closer to the practical situation than the old model proposed in literature. Based on works mentioned above, the influence of impact angle, parameters of structure and material on impact force was analyzed by numerical simulation.

On the Evaluation of Surface Fatigue Strength of a Stainless-Steel Aeronautical Component

“…Braccesi et al [36] presented a relationship between the Hertz equivalent elastic stress limit with typical design parameters such as the allowable material stress, the geometric characteristics in contact areas, the impact angles, and the rotational speed for different types of materials, using an elastic-plastic model for a curved body in contact. Zhang et al [37] studied the influence of various factors on the impact forces generated between the spheres and recirculation mechanism for different types of materials and for different recirculation geometries.…”

Comparative Study on Dynamical Performance of Hybrid Ceramic and Steel Ball Screw Mechanism Based on Multi-Body Dynamic Simulation

“…Z.Y. Zhang et al [4] discussed the influence factors on impact force between steel ball and re-circulating mechanism-material properties, groove geometry of re-circulating mechanism and impact angle, etc for example. However, few studies have been attempted to find the ball's material and different style of ball strain's effect on the performance of the ball screw mechanism.…”