Roller Linear Guides Kinetic Analysis Of The Contact Problem

With the development of modern industry, more and more extensive use of rollerlinear guide, the dynamic characteristics in the course of their work more and moreimportance in enterprises, higher and higher demands on the quality of the ball linearguide, whichvibration and noise on the quality of the roller linear guide very critical factor,the vibration will lead directly to the roller linear guides guiding accuracy is reduced.Thisarticle will focus on the study from the vibration characteristics of the linear guide.This paper analyzes the dynamic characteristics of the roller into the device for return,the main analysis roller bearing area to enter the frequency of the non-bearing area, andthe contact within the collision in the device for return. Concern on the EHL theory andprocessing errors, mainly analysis the dynamic characteristics of the roller linear guide.First, based on Hertz contact theory, get the mathematical expression of the contact forceand deformation of the rollers and the rail and slider, and then based on the theory of EHLfilm thickness at the center of the contact roller and rail slider contact load and velocity,and get the film thickness expression, provide the basis for the establishment of fivedegrees of freedom dynamic model of the roller linear guide.This paper created five degrees of freedom dynamic model for The roller linear guideconsidering waviness and lubrication. Using the harmonic function to create the wavinessmodel for the slider, the track and the roller. Then consider the waviness, lubrication andpre-load conditions established for five degrees of freedom slider dynamic model. And usethe Runge-Kutta numerical method to solve the kinetic equation. And then analyze theresults draw waviness on the dynamic characteristics of the roller linear guide. Throughthe analysis of simulation results，I have studied the influence of waviness on the naturalfrequency of the roller linear guide.