Experimental Investigation on Granite Cutting by Means of Diamond Frame Saw

Abstract

A great quantity of granite sawing experiments was carried out to explore the cutting performance offrame sawing machine with the horizontal reciprocating cutting mode.A model of average thickness of cutting chip was established, and characteristics of cutting forces were analyzed. The mechanism of wear was revealed by analyzing the width of the saw kerf and the wear morphology of the diamond segments. The results showed that the wear resistance and the cutting forces ncrease as the feed speed. The cutting forces change abruptly at the reversing point during granite cutting. At the same time, the proportion of macro-fractured and pulled-out particles and the mean wear rate of segments increase with the feed speed, and the mean protrusion height of the grits is less than 100 μm. The width of the saw kerf is gradually reduced as the sawing progresses, forming an inverted cone with a large upper side and a small lower side. Besides, the studies found that the wear of the segments remains consistent in two directions. The prominent phenomenon of the diamond particles on the side surface is more obvious as the feed speed increases.The research can provide certain data support for granite cutting, and lay the foundation for the subsequent optimization of the structure and equipment.