Title: Characteristics of material removal processes in single and multiple cutting edge grit scratches

Authors: X. Chen; T.T. Öpöz

Addresses: Advanced Manufacturing Technology Research Laboratory, General Engineering Research Institute, Liverpool John Moores University, Liverpool L3 3AF, UK ' Advanced Manufacturing Technology Research Laboratory, General Engineering Research Institute, Liverpool John Moores University, Liverpool L3 3AF, UK

Abstract: This paper provides a fundamental investigation on the material removal mechanism in grinding. With single and multiple edge CBN grit scratch tests, the En24T steel material removal is characterised by considering material pile up ratio, material removal specific energy and acoustic emission feature during the scratching process. It has been discovered that the cutting edge shape of the grit has a significant influence on the proportion of ploughing and cutting actions. Cutting and ploughing actions vary with the number of cutting edges leading to different cutting force, specific energy, pile up ratio and acoustic emission (AE) energy. According to experimental results, cutting action is more effective in single edge scratches while ploughing action is more dominant in the multiple edge scratches. The research finding provides critical first-hand insight of material removal mechanism for improving grinding efficiency through wheel design and dressing operation.

Keywords: abrasive grit; single grit; scratching tests; material removal; pile up ratio; single edge; multiple edges; grinding; acoustic emission; cutting edges; edge grit scratches; grinding efficiency; grinding wheel design; grinding wheel dressing.

DOI: 10.1504/IJAT.2014.060693

International Journal of Abrasive Technology, 2014 Vol.6 No.3, pp.226 - 242

Received: 19 Nov 2013
Accepted: 19 Nov 2013

Published online: 21 Jun 2014 *

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