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receptance-coupling
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Extending the inverse receptance coupling method for prediction of tool-holder joint dynamics in milling
, Article Journal of Manufacturing Processes ; Volume 14, Issue 3 , 2012 , Pages 199-207 ; 15266125 (ISSN) ; Movahhedy, M. R ; Moradi, H ; Ahmadian, M. T ; Sharif University of Technology
Elsevier
2012
Abstract
Recently, receptance coupling substructure analysis (RCSA) is used for stability prediction of machine tools through its dynamic response determination. A major challenge is the proper modelling of the substructures joints and determination of their parameters. In this paper, a new approach for predicting tool tip FRF is presented. First, inverse RCSA formulation is extended so that the holder FRFs can be identified directly through experimental modal tests. The great advantage of this formulation is its implementation in arbitrary point numbers along joint length. Therefore, in comparison with previous inverse RCSA approaches, a more realistic joint model can be considered. In addition, due...
Development of inverse receptance coupling method for prediction of milling dynamics
, Article ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, ESDA2010, 12 July 2010 through 14 July 2010, Istanbul ; Volume 5 , 2010 , Pages 339-346 ; 9780791849194 (ISBN) ; Movahhedy, M. R ; Ahmadian, M. T ; Moradi, H ; Sharif University of Technology
2010
Abstract
Receptance coupling substructure analysis (RCSA) is extensively used to determine the dynamic response of milling tool at its tip for the purpose of prediction of machining stability. A major challenge in using this approach is the proper modelling of the joint between the substructures and determination of its parameters. In this paper, an inverse RCSA is developed for experimental extraction of tool-holder frequency response function (FRF) including joint parameters. The accuracy and efficiency of this method is evaluated through an analytical investigation. It is shown that the extracted holder FRF can provide a highly accurate prediction of the tool tip FRF. The developed method is used...
Receptance coupling for end mills
, Article International Journal of Machine Tools and Manufacture ; Volume 43, Issue 9 , 2003 , Pages 889-896 ; 08906955 (ISSN) ; Altintas, Y ; Movahhedy, M ; Sharif University of Technology
2003
Abstract
Identification of chatter free cutting conditions, the chatter stability lobes, requires a measurement of the frequency response function (FRF) of each tool mounted on the spindle. This paper presents a method of assembling known dynamics of the spindle-tool holder with an analytically modeled end mill using the receptance coupling technique. The classical receptance technique is enhanced by proposing a method of identifying the end mill-spindle/tool holder joint dynamics, which include both translational and rotational degrees of freedom. The method requires measurement of FRFs with impact tests applied on the spindle-tool holder assembly and blank calibration cylinders attached to the...
Study of the Effect of Miniaturization of Milling Machines on the Quality of
the Product Surface
,
M.Sc. Thesis
Sharif University of Technology
;
Akbari, Javad
(Supervisor)
;
Movahhedy, Mohammad Reza
(Supervisor)
Abstract
Improvements in the technology of manufacturing mechanical parts in recent years, has enabled the manufacturers to produce machine tools in small sizes (installable on a desk) which look like conventional counterparts and are called desk-top size machine tools. One important aspect of machine tools operation is the machined surface integrity. Thus, it is necessary to compare desk-top size machines with their conventional counterparts from this point of view. This comparison is the purpose of this thesis in which “surface error” and “surface roughness” of milling machines as a kind of machine tools are compared between conventional and miniaturized machines. To compare the surface errors,...