Investigation of the sawing performance of a new type of diamond frame saw machine

Generally the frame sawing with diamond segmented blades is the equipment in soft stones sawing process. In this work, a new type of frame saw machine used for cutting granite is introduced. The sawing trajectory and the theoretical relationship between the average chip thickness and the sawing parameters are established. Utilizing the new frame saw machine, an experimental study was carried out to investigate the sawing forces and segments wear in different strokes. It is concluded that no matter in forward stroke or in backward stroke, only half of the stroke is sawing the stone. The sawing forces of segments increase with the increase of the feed speed and cutting length, and show a decrease trend with the increase of the rotation speed of the crank. What's more, the forces in backward stroke are higher than that of forward stroke. Well-developed matrix tails are formed behind the diamond grits, while the wear of segments at the front end of the blade is severe than that in the middle and at the rear end, the shapes of the diamond segments changed from trapezoidal into rectangular.