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1769358 
Journal Article 
Vibrator Development for Hole Machining by Ultrasonic Longitudinal and Torsional Vibration 
Asami, T; Miura, H 
2011 
Yes 
Japanese Journal of Applied Physics
ISSN: 0021-4922
EISSN: 1347-4065 
50 
7 
WOS:000292881200074 
We are developing a new method using ultrasonic longitudinal
and torsional vibrations of a hollow-type stepped horn with diagonal slits for hole machining. We
foresee that, with this method, equipment can be simplified and miniaturized. In this study,
ultrasonic vibration sources of a horn with diagonal slits and a uniform rod with diagonal slits
are used. The longitudinal and torsional vibration characteristics of the horn are studied and
the shape of the diagonal slits is examined. As a result, to obtain the maximum torsional
vibration at the tip, the diagonal slit conditions were as follows: the center position of the
diagonal slits was the position of the node of longitudinal vibration, the angle was 35 degrees,
and the depth was 3.5 mm in all cases of cross-sectional ratio. It was clarified that a horn with
diagonal slits can be used for hole machining of brittle materials. (C) 2011 The Japan Society of
Applied Physics