diamond saw blade selection criteria
- Dec 07, 2017 -
1, the choice of diamond particle size When the diamond particle size is coarse and a single particle size, the saw blade sharp, high sawing efficiency, but the bending strength of diamond agglomerates decreased; when the diamond fineness or coarseness and fineness mixed, saw blade knife Head durability is high, but less efficient. Considering the above factors, the choice of diamond particle size of 50/60 mesh is more appropriate.
2, the choice of diamond concentration distribution Within a certain range, when the diamond concentration changes from low to high, the saw blade sharpness and sawing efficiency gradually decreased, while the service life is gradually extended; but the concentration is too high, the blade will change blunt. The use of low concentrations, coarse-grained, efficiency will increase. The use of the various parts of the cutter sawing different role in the use of different concentrations (ie three or more layers in the middle layer can be used at lower concentrations), Saw blade in the middle of the work process to form the middle groove, there Help prevent the saw blade deflection, thereby improving the quality of stone processing.
3.The choice of diamond strength The strength of diamond is an important indicator to ensure cutting performance. Excessive strength will make the crystal difficult to be broken, the abrasive particles are polish when using, the sharpness will decrease, resulting in deterioration of the tool performance. When the strength of the diamond is not enough, it is easy to be broken after being hit and it is hard to shoulder the cutting task. It should choose the intensity of 130 ~ 140N.
4, the choice of binder phase Saw blade performance does not depend solely on the diamond, but depends on the appropriate combination of diamond and binder composition of the composite material such as the overall performance. For marble and other soft stone, requiring the mechanical properties of the blade is relatively lower, the choice of copper-based adhesive. However, copper-based binder sintering temperature is low, low strength, hardness, high toughness, low bond strength with diamond. When adding tungsten carbide (WC), WC or W2C as the framework metal, with an appropriate amount of cobalt to improve the strength, hardness and bonding characteristics, and add a small amount of low melting point, low hardness of Cu, Sn, Zn and other metals for bonding phase. The main plus component size should be thinner than 200 mesh, adding ingredients should be smaller than 300 mesh size.
5, the choice of sintering process With the increase of temperature, the degree of densification of the carcass increased, flexural strength also increased, and with the holding time, blank flexural strength of the carcass and diamond clumps first increase After the reduction, you can choose to sintering at 800 ℃ 120s process to meet performance requirements.
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