Study on Static Stiffness Analysis of Linear Motion Ball Guide

—Improve Analysis Accuracy of Load Distribution Theory and Reduce Analysis Costs—

Abstract

The purpose of this study is to improve the accuracy of numerical analysis of linear motion ball guide (LMBG) and reduce the analysis cost. The author explains the load distribution theory, which is the basis of the theoretical analysis of LMBG. Next, the author explains how to apply carriage rail FE analysis to load distribution theory to improve analysis accuracy by taking into account elastic deformation of components. Next, we will conduct experiments on the stiffness of the LMBG in the vertical and rolling directions, confirm the validity by comparing the theoretical values with the experimental values, and consider the effects of the influence of the components on the LMBG stiffness. Finally, in order to reduce the analysis cost, we will explain how to transform the carriage deformation into a formula using the carriage FEM model load distribution theory and apply it to the load distribution theory. This theory enables high-accuracy analysis in a short time, and can be applied to various performance predictions of LMBG with a huge variety.