Title: Application of ultrasonic vibration assistance into tooling axis direction in meso-scale milling

Authors: Jeong Hoon Ko

Addresses: SIMTech, 71 Nanyang Drive 638075, Singapore

Abstract: So far, the industrial application of ultrasonic vibration assistance has been successful in continuous machining process such as turning process where ultrasonic vibration velocity is much higher than cutting velocity. Recently, the application of ultrasonic vibration assistance in milling process has been experimentally investigated for feed and cross-feed directions. This paper focuses on the effect of ultrasonic vibration assistance in spindle axial direction for improvement of machined surface. With the designed ultrasonic vibration assisted milling process with 39.7 kHz and a few micro-metre amplitudes, workpiece vibrates along spindle axial direction while different RPMs and feed rates are applied. The axial directional vibration assistance acts as additional cutting motion which further reduces the leftover surface error. Experimental results validate that surface roughness can be improved from 20% to 65% for the tested conditions. The simulation results have been proposed to validate the surface quality improvement phenomenon with the help of the axial ultrasonic vibration assistance.

Keywords: meso-scale milling; surface quality; ultrasonic vibration assistance; simulation; tooling axis direction; spindle axial direction; surface roughness.

DOI: 10.1504/IJAT.2012.051032

International Journal of Abrasive Technology, 2012 Vol.5 No.3, pp.213 - 222

Received: 05 Sep 2012
Accepted: 06 Sep 2012

Published online: 30 Jul 2014 *

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