Investigations and Prediction of Diamond Wear when Sawing

Abstract

This paper commences by discussing work conducted by other authors and investigates the previously undefined precise mode of wear on a diamond segment during sawing, the sawing operation being described as an undefined cutting edge process. The role of the matrix and that of the diamond and their important inter-relationship is also examined. investigations have, until now, mainly involved analysis of random diamonds at various unrelated stages in their lives. To establish the exact wear progression, selected particles were followed from the moment they emerged from the matrix, through each stage, until the particle was lost. A diamond circular saw blade with two removable segments was manufactured. These segments were analysed using a scanning electron microscope. After considering the difference between circular and frame sawing, two separate tests were proposed to help establish the optimum tool specification required. To complete these investigations, a special-purpose rig was manufactured to simulate the circular sawing operation and a computer was used to assist in calculating the specific energy. It was envisaged that this would help in the determination of the sawability of a particular stone type. It is hoped that the work will show how an understanding of the mode of wear of a diamond tool can help in the recommendation of optimum diamond specification.