The friction effects for contact force analysis of three-axes CNC machine tool
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 17 August 2018
Issue publication date: 13 November 2018
Abstract
Purpose
The purpose of this paper is to study the influence of friction on static and dynamic characteristics, as well as the strength and lifetime of a flexible three-axes computer numerical control (CNC) machine tool.
Design/methodology/approach
The machine tool is first modeled by using finite element method to analyze static structure with frictionless surface-to-surface contact type. Because the machine tool structure is becoming more and more sophisticated over time, the significant influence of contact conditions between structural elements on the dynamic characteristics of the whole structure must be considered. To examine the dynamic effects caused by inertia forces and displacement of moving bodies on contact stress, the coefficient of friction between two contact bodies is added to perform dynamic simulation and compare the results with the static analysis results.
Findings
Distribution of stress and contact forces in solid-flexible contact is also studied by using the fundamental dynamic characteristics of a bushing joint.
Originality/value
Finally, the influence of dynamic structure, cutting conditions and material properties on the strength and lifetime of the CNC machine tool is discussed by using fatigue analysis. Consequently, this research can be used for efficient simulation of structural dynamics, lifetime assessment and interactions of the real CNC machine with the machine tool structure in a virtual environment.
Keywords
Acknowledgements
This paper forms part of a special section “Advances in Engineering Tribology Technology (ICEATAT2016)”, guest edited by Jeng-Haur Horng.
This research work is supported by Ministry of Science and Technology of Taiwan under the grant contracts MOST 105-2622-8-150-001-TE3, MOST 104-2622-E-150-009-CC3 and CTSP-105AG04.
Citation
Hwang, Y.-L. and Ta, T.-N. (2018), "The friction effects for contact force analysis of three-axes CNC machine tool", Industrial Lubrication and Tribology, Vol. 70 No. 8, pp. 1527-1535. https://doi.org/10.1108/ILT-02-2017-0045
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited