The speed at which the blades work, because the speed at which the diamond is cut is affected by different conditions in the actual working process. Therefore, the quality of the saw blades will be subject to certain restrictions, from the life of the saw blades with the efficiency of the saw blade can be seen, should be based on different materials to select the speed of the saw blade. What are the other factors that influence the life of diamond saw blades?
(1) Diamond granularity: The common diamond granularity is within the 30 35 range. The harder the rock is, the finer the grain size should be chosen. Because under the same pressure conditions, the finer the diamond the sharper, is advantageous to cut into the hard rock. In addition, the general large-diameter saw blades require high sawing efficiency, it is advisable to choose the coarse grain size, such as 30/40, 40/50; small diameter saw blade cutting efficiency is low, require the rock sawing cross-section smooth, it is advisable to choose a finer granularity, such as 50/60, 60/80.
(2) Knife head concentration: the so-called diamond concentration, refers to the diamond in the working layer of the distribution of the carcass density (that is, the unit area of the weight of diamonds). "Specification" stipulates that the concentration of 4.4 carat diamond in a cubic centimeter working carcass is 100%, and the concentration is 75% when it contains 3.3 carat diamonds. The volume concentration indicates how much the diamond occupies in the agglomeration and stipulates that when the volume of the diamond is 1/4 of the total volume, the concentration is 100%. The increase of diamond concentration is expected to prolong the life of the saw blade, since the average cutting force per diamond is reduced by increasing concentration. However, increasing the depth of the saw blade will inevitably increase the cost, thus there is a most economical concentration, and the concentration increases with the Cheng cutting rate.
(3) The hardness of the knife-head binder: In general, the higher the hardness of the binder, the stronger its abrasion resistance. As a result, when sawing and grinding large rock, the binder hardness is high, when sawing material soft rock, the binder hardness should be low, when sawing and grinding of large and hard rock, binder hardness should be moderate.
(4) Force effect: During sawing, the blade is subjected to axial and tangential forces. Because of the effect of the force in the circumferential direction and the radial presence, the saw blade is wavy in axial shape and disc-shaped in the radial shape. These two kinds of deformation will cause the uneven surface of the rock, the waste of stone, the noise when sawing, and the increase of vibration, resulting in the early breakage of diamond caking and the reduction of the life of saw blades.