0
RESEARCH PAPERS

Dynamic Acceptance Tests for Horizontal Milling Machines Based on a Statistical Theory of Machine Tool Chatter

[+] Author and Article Information
M. A. El Baradie, M. M. Sadek, S. A. Tobias

Department of Mechanical Engineering, University of Birmingham, Birmingham, Great Britain

J. Eng. Ind 98(3), 919-929 (Aug 01, 1976) (11 pages) doi:10.1115/1.3439053 History: Received May 22, 1975; Online July 15, 2010

Abstract

Machine tool chatter is essentially a statistical phenomenon. The dynamic characteristics of machine tools as well as the dynamic coefficients of the cutting process are statistical quantities which show scatter when determined in repeated tests. They can therefore be specified only in terms of mean values with confidence limits. The statistical theory of chatter developed in this paper deals with the scatter of dynamic data of the machine structure but assumes that the dynamic cutting coefficients have discreet values. This is used for analyzing two series of tests carried out on horizontal milling machines. In the first series a particular machine was tested ten times and from the results thus obtained the mean threshold of stability with its confidence limits was established. In the second series a batch of the same type of machines taken at random were analyzed in a similar manner, with the aim of establishing “type behavior”. In the second series of tests large scatter in the dynamic characteristics was found, causing a large scatter in predicted cutting performance. Thus, machines which have the same specification and which to all appearances are identical may have widely varying resistance to chatter. It is recommended that machines should be “graded” on the basis of the dynamic acceptance tests evolved so as to ensure that the user will obtain “value for money”.

Copyright © 1976 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In