Dynamic stability of a Hexaglide machine tool for milling processes

One of the major issues related to parallel kinematic machine tools (PKMs) is their structural dependency on their configuration. In this paper, the machine configuration effect on its stability is investigated for the case of a Hexaglide machine tool. An FEM model of the Hexaglide machine tool is d...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2016-09, Vol.86 (5-8), p.1753-1762
Main Authors: Najafi, A., Movahhedy, M. R., Zohoor, H., Alasty, A.
Format: Article
Language:English
Subjects:
CAE) and Design
Computer-Aided Engineering (CAD
Configurations
Cutting parameters
Dependence
Dynamic stability
Engineering
Entrances
Finite element method
Frequency response functions
Frequency stability
Frequency variation
Industrial and Production Engineering
Machine tools
Mathematical models
Mechanical Engineering
Media Management
Milling (machining)
Modal analysis
Original Article
Resonant frequencies
Stiffness
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Description
Summary:One of the major issues related to parallel kinematic machine tools (PKMs) is their structural dependency on their configuration. In this paper, the machine configuration effect on its stability is investigated for the case of a Hexaglide machine tool. An FEM model of the Hexaglide machine tool is developed. The frequency response function (FRF) at the tool tip is obtained by a modal analysis. The numerical results are validated through comparison with those of an experimental modal test. The pose dependency of the PKM stability over its workspace is investigated. It is shown that the machine stability over the workspace is dependent on the spindle/tool/holder system characteristic. For spindle/tool/holder systems with higher stiffness and lower natural frequency, the stability variation is higher. Moreover, it is found that the stability contours can be affected by the entrance and exit cutting angle.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-015-8331-4