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RESEARCH PAPERS

The Impact Damper as a Method of Improving Cantilever Boring Bars

[+] Author and Article Information
M. D. Thomas, W. A. Knight, M. M. Sadek

Mechanical Engineering Department, University of Birmingham, England

J. Eng. Ind 97(3), 859-866 (Aug 01, 1975) (8 pages) doi:10.1115/1.3438693 History: Received June 06, 1974; Online July 15, 2010

Abstract

The dynamic behavior of three different designs of a cantilever boring bar are compared by means of forced vibration tests. These are a bar with diametrically opposed flats machined along its length, a bar fabricated from laminates of steel and a damping compound, and a bar fitted with an impact damper. The impact damper boring bar is found to be the most effective, and an improved design, giving increases in stable metal removal rates of more than 100 percent, is outlined and tested. A theoretical analysis is presented for predicting the effectiveness of the impact damper with a spring supported impacting mass. This analysis enables the optimum mass ratio and gap setting of the damper to be selected for specified characteristics of the vibrating systems to which the damper is fitted.

Copyright © 1975 by ASME
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