Simulating modular rolling guides elastic properties

L Ya Gilovoi,V V Molodtsov,A V Krutov,A V Isaev,S Bratan,S Roshchupkin

doi:10.1051/matecconf/202134601004

Abstract

Due to high performance characteristics of the modular rolling guides, they are widely used in the contemporary CNC machine designs by major manufacturers. The wrong choice of the guide characteristics can result in excessive cost of guides or maintenance, as well as insufficient rigidity of the machine. Various methods of modular rolling guides elastic properties studying and machine tool structure deformation analysis are known. Most of them are analytical solutions in which the cartridge body and the rail are considered non-deformable. The purpose of this study is to develop a hybrid numerical-analytical model based on the FEM and analytical solution. This approach makes it possible to take into account the joint deformation of bodies (cartridge body, rail, etc.) and contact deformation of the balls and raceways of the guides. The study was carried out in SolidWorks Simulation application. The simulation results correlate with the experimental data well. The displacements of the cartridge have lower values than the values obtained using the FEM model. To evaluate the significance of the model nonlinearity and the possibility of its linearization, a series of calculations of the gear hobbing machine structure elements were performed. The hybrid numerical-analytical model created improves the adequacy of the simulation results.

Highlights

Contact deformations of joints [1], including sliding and rolling guides [2, 3, 9, 10], make a significant contribution to the elastic deformations of the bearing systems of machine tools
Modular rolling guides have a number of interdependent performance characteristics, which are selected depending on the operating conditions
The wrong choice of the guide characteristics can result in excessive cost of guides or maintenance, as well as insufficient rigidity of the machine, which reduces its performance

Summary

Introduction

Contact deformations of joints [1], including sliding and rolling guides [2, 3, 9, 10], make a significant contribution to the elastic deformations of the bearing systems of machine tools. Modular rolling guides have a high reliability. This ensured their predominant use in contemporary machine designs, primarily with CNC. Modular rolling guides have a number of interdependent performance characteristics, which are selected depending on the operating conditions. This paper in contrast, for example, to [11] presents a hybrid numerical-analytical model based on the FEM and analytical solution [1, 3]. This approach makes it possible to take into account the joint deformation of bodies (cartridge body, rail, etc.) and contact deformation of the balls and raceways of the guides. The finite element models of the rolling guides were developed using the specifications of on the design of the following cartridges: TNK SHS25LC2 with a separator, Schaeffler

Objectives

Findings

Conclusion