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RESEARCH PAPERS

Whirling Vibration in Drilling. Part 1: Cause of Vibration and Role of Chisel Edge

[+] Author and Article Information
H. Fujii

Dept. of Precision Engineering, Gifu University, 1-1, Yanagido, Gifu-shi, Gifu-ken 501-11, Japan

E. Marui

Dept. of Mechanical Engineering, Gifu University, 1-1, Yanagido, Gifu-shi, Gifu-ken 501-11, Japan

S. Ema

Dept. of Technology Engineering, Gifu University, 1-1, Yanagido, Gifu-shi, Gifu-ken 501-11, Japan

J. Eng. Ind 108(3), 157-162 (Aug 01, 1986) (6 pages) doi:10.1115/1.3187057 History: Received June 12, 1985; Online July 30, 2009

Abstract

The whirling vibration of the drill in the beginning of the drilling operation is experimentally investigated. Special attention is paid to how vibration develops as the drill proceeds into the workpiece. Three types of drills with different web thicknesses are used, and the characteristics and cause of the vibration are discussed. Whirling vibration, which has an elliptical orbit, is a self-exited vibration accompanied by a phase lag with respect to the revolution of the workpiece. The vibration energy is provided by the regenerative effect at the major cutting edge, while the chisel edge acts to dampen the vibration.

Copyright © 1986 by ASME
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