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The Finite Element Analysis Of The High-Speed Machine Centers Based On The Finite Element Software ANSYS

Posted on:2006-02-20Degree:MasterType:Thesis
Country:ChinaCandidate:X P LiFull Text:PDF
GTID:2121360182969339Subject:Mechanical design and theory
Abstract/Summary:PDF Full Text Request
With the development of high-speed machine centers toward the high-speed cutting, high-speed feeding and high machining accuracy, the high-speed machine center is designed more and more complexly. The high-speed machine centers are required not only to have good static property but also to have good dynamic property. For the design of high-speed machine center it is necessary to be carried out the finite element analysis and predict the static and dynamic response. The main structure characteristic of the two types of high-speed machine centers, the welded EQD18 and cast PM50A types are analyzed and compared. The finite element model of the two machine centers are built with the finite element software ANSYS. The fixing and moving contact surfaces in the machine centers are simulated using the user-defined element. The driving screws are simulated as the bar element and the beam element respectively. The effects of the two kinds of element on the natural frequency of the machine centers are analyzed. Comparing the analysis result with the experimental result, it is proved that the bar element is more conformed to the real machine center. The static, modal and harmonic responses of the machine center models are analyzed using the finite element model proposed. The static stiffness, the dynamic stiffness and the natural frequency of the two types of machine centers are calculated in the different situations. Comparing the analysis results of the type EQD18 machine center with the results of the experiment, the finite element model presented in the thesis is proved to be an efficient and valid way to analyze the machine centers and is reliably provided for the design of high-speed machine centers.
Keywords/Search Tags:high-speed machine center, finite element analysis, static analysis, modal analysis, harmonic analysis
PDF Full Text Request
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