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Diamond saw blade is used for cutting material such as stone tools, its essential nature is hard and sharp, with the development of the industry we is more inseparable from the diamond saw blade, diamond saw blade market will become more and more light.
In the actual work, the linear velocity of diamond saw blade is limited by the equipment condition, the quality of the saw blade and the quality of sawing stone. In terms of the service life and sawing efficiency of the best saw blades, the linear speed of the saw blade should be selected according to the properties of different stones. Saw blade linear velocity can be selected within 25m ~ 35m/s. For granite with high quartz content and difficult to cut, it is advisable to take the lower limit of blade speed. In the production of granite face brick, the diamond circular saw blade is smaller in diameter, and the linear velocity can reach 35m/s.
In the process of cutting stone, diamond circular saw blade will be affected by centrifugal force, sawing force, sawing heat, etc.
Because of the force effect and temperature effect, the diamond circular saw blade is worn out.
Force effect: during sawing, the blade is affected by axial force and tangential force. Because of the force acting on the circumferential direction and the radial force, the saw blade is wavy in the axial direction and is in a disc shape in the radial direction. These two kinds of deformation will result in the uneven surface of the rock, the waste of stone, the loud noise and vibration of the sawing, resulting in the early damage of the diamond and the reduced life of the saw blade.
Temperature effect: the traditional theory holds that the influence of temperature on the sawblade process is mainly reflected in two aspects: first, the diamond graphitization in the block; The second is to cause the thermal stress of the diamond and the body and lead to the premature loss of diamond particles. New research shows that the heat generated during the cutting process is mainly afferent. Arc temperature is not high, generally between 40 ~ 120 ℃. The grinding point temperature is higher, usually between 250 and 700. The cooling liquid only reduces the average temperature of the arc zone, but has little effect on the abrasive temperature. That not make the graphite carbonization temperature, however, can make the friction between abrasive grain and workpiece properties change, and thermal stress occurred between diamond and additives, and to cause a fundamental change of the failure mechanism of diamond. The study shows that the temperature effect is the most important factor that causes the blade breakage.
Abrasion: due to the force effect and temperature, the use of the saw blade for a period of time tends to produce wear and tear. There are several types of abrasion: abrasive wear, local crushing, large area crushing, falling off, and mechanical abrasion along the cutting speed. Abrasive wear: constant friction between diamond particles and components, the edge passivating into a plane, losing cutting performance and increasing friction. Cutting heat can make the diamond particle surface graphitization thin layer, the hardness is greatly reduced, increase the wear: diamond particles surface under alternating thermal stress, as well as cutting under alternating stress, fatigue cracks will occur and local breakage and show new sharp edge, is the ideal wear form; Large area crushing: the diamond particles bear the impact load when cutting into the cutting, and the prominent grains and grains are consumed prematurely. Shedding: the alternating cutting force causes the diamond particles to be shaken continuously in the binder. At the same time, the wear and sawing heat of the combined agent in the sawing process soften the binding agent. This reduces the control power of the binder, and when the cutting force on the particle is greater than the control force, the diamond particles will fall off. Any kind of wear is closely related to the load and temperature of the diamond particles. Both depend on sawing and cooling conditions.