Dynamic characteristics of a gantry milling machine under the influence of linear guide preload

Jui Pin Hung, Yuan Lung Lai, Yong Run Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study was aimed to investigate the influence of the linear guide configuration on the dynamic characteristics of a gantry milling machine. To predict the dynamic characteristics, we created the finite element model of the gantry machine, in which linear components were also included and modeled with the introduction of the contact stiffness defined by Hertz contact theory. Using this model, the vibration modes dominating the dynamic stiffness were determined. The results of the finite element simulations reveal that the linear guides with different preloads greatly affect the dynamic responses of the spindle tool. These results were validated by performing vibration tests on the milling machine prototype. Comparisons of the predicted results and experimental data show good agreements between them. According to the analysis results, the maximum dynamic compliance can be increased by 33% in X-axis direction and decreased by 18% in Y-axis direction, respectively when the linear guides are changed from low to high preload. Overall, current results clearly suggest that the proposed gantry model can be used to evaluate how the specification of the linear components can affect the machining performance of the milling machine.

Original languageEnglish
Title of host publicationEngineering Decisions for Manufacturing Systems
Pages194-199
Number of pages6
DOIs
Publication statusPublished - 2013 Oct 29
Event2nd International Symposium on Manufacturing Systems Engineering, ISMSE 2013 - , Singapore
Duration: 2013 Jul 272013 Jul 29

Publication series

NameApplied Mechanics and Materials
Volume404
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

Other2nd International Symposium on Manufacturing Systems Engineering, ISMSE 2013
CountrySingapore
Period13-07-2713-07-29

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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