Analysis and Research on the Modal Experiment of Series-Parallel Hybrid Grinding and Polishing Machine

In order to improve the dynamic performance of the grinding machine and improve the machining precision of the machine tool, a modal experiment is conducted on the complete machine and main sub-structures of the series-parallel hybrid grinding and polishing machine tool according to the basic theory...

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Bibliographic Details
Published inMATEC Web of Conferences Vol. 175; p. 2018
Main Authors Qu, Xing-tian, Zhang, Jia-he, Wang, Xin
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 01.01.2018
Subjects
Damping ratio
Design optimization
Dynamic characteristics
Grinding
Machine tools
Machining
Modal analysis
Parameter identification
Polishing
Resonant frequencies
Sampling methods
Substructures
Vibration analysis
Vibration mode
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Summary:In order to improve the dynamic performance of the grinding machine and improve the machining precision of the machine tool, a modal experiment is conducted on the complete machine and main sub-structures of the series-parallel hybrid grinding and polishing machine tool according to the basic theory of experimental modal analysis. Also, hammer impulse excitation and varied-time-based sampling methods are adopted to perform experimental modal analysis. Meanwhile, the eigensystem realization algorithm (ERA) is utilized to identify modal parameters, so that the low-order natural frequency, damping ratio and modal shape of the complete machine and its main substructures can be obtained. Based on the analysis of frequency and vibration mode, the beam is a weak link of the machine tool, while an approach to improve the dynamic characteristics of the machine tool structure is proposed to provide a basis for the optimized design of dynamics.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/201817502018