(1) Saw blade line speed: In actual work, the linear speed of the diamond saw blade is limited by the condition of the equipment, the quality of the saw blade and the nature of the sawed stone. From the optimum saw blade life and sawing efficiency, the linear speed of the saw blade should be selected according to the nature of the different stones. When sawing granite, the linear speed of the saw blade can be selected from 25m to 35m/s. For granite with high quartz content and difficult to saw, the lower limit of the blade line speed is appropriate. In the production of granite tiles, the diameter of the diamond saw blade is small, and the linear velocity can reach 35m/s.
(2) Sawing depth: Sawing depth is an important parameter related to diamond wear, effective sawing, blade force and the nature of the stone being sawed. Generally speaking, when the linear speed of the diamond saw blade is high, a small cutting depth should be selected. From the current technology, the depth of the sawing diamond can be selected between 1 mm and 10 mm. When sawing granite blocks with large-diameter saw blades, the sawing depth can be controlled between 1mm and 2mm, and the feed rate should be reduced at the same time. When the linear speed of the diamond saw blade is large, a large depth of cut should be selected. However, when the performance of the saw and the allowable range of tool strength, the cutting concentration should be taken as much as possible to improve the cutting efficiency. Small depth cuts should be used when machining surfaces are required.
(3) Feeding speed: The feed speed is the feed rate of the sawed stone. Its size affects the sawing rate, the force on the saw blade, and the heat dissipation in the sawing area. Its value should be selected according to the nature of the stone being sawed. Generally speaking, sawing softer stones, such as marble, can increase the feed speed appropriately. If the feed speed is too low, it is more conducive to improving the sawing rate. The sawing of the fine-grained, relatively homogeneous granite can increase the feed speed appropriately. If the feed speed is too low, the diamond blade is easily smoothed. However, when cutting granite with coarse grain structure and uneven hardness, the feed speed should be reduced, otherwise the vibration of the saw blade will cause the diamond to break and reduce the sawing rate. The cutting speed of sawing granite is generally selected within the range of 9m to 12m/min.
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