The whirling vibration of the drill when beginning the drilling of a workpiece with a pilot hole, is theoretically examined. It becomes clear that the whirling is a regenerative chatter vibration which is caused by the regenerative effect at the major cutting edge and the frictional force occurring due to the interference between the flank surface of the major cutting edge and the workpiece surface. As the amplitude and the vibration speed of the drill are restricted by the characteristic of the frictional force, distinctive vibration wave forms are observed. It is also found that the frequency of the whirling vibration which is decreased by the frictional force, is considerably lower than the natural frequency of the system, and that the odd number polygon is produced by the regenerative effect.
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November 1988
This article was originally published in
Journal of Engineering for Industry
Research Papers
Whirling Vibration in Drilling. Part 3: Vibration Analysis in Drilling Workpiece with a Pilot Hole
S. Ema,
S. Ema
Department of Technology Education, Gifu University, 1-1 Yanagido, Gifu-shi 501-11, Japan
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H. Fujii,
H. Fujii
Department of Mechanical Engineering, Gifu University
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E. Marui
E. Marui
Department of Mechanical Engineering, Gifu University
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S. Ema
Department of Technology Education, Gifu University, 1-1 Yanagido, Gifu-shi 501-11, Japan
H. Fujii
Department of Mechanical Engineering, Gifu University
E. Marui
Department of Mechanical Engineering, Gifu University
J. Eng. Ind. Nov 1988, 110(4): 315-321
Published Online: November 1, 1988
Article history
Received:
September 1, 1986
Online:
July 30, 2009
Citation
Ema, S., Fujii, H., and Marui, E. (November 1, 1988). "Whirling Vibration in Drilling. Part 3: Vibration Analysis in Drilling Workpiece with a Pilot Hole." ASME. J. Eng. Ind. November 1988; 110(4): 315–321. https://doi.org/10.1115/1.3187888
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