2013年8月7日星期三

the Quality Diamond Saw Blades

 One, cutting parameters
(1) blade speed: In practice, the line speed diamond saw blades by equipment conditions, saw the diamond discs  quality and the nature of the restrictions before sawing stone. From the optimum blade life and cutting efficiency, it should be selected depending on the nature of the stone saw blade speed. Sawing granite, the blade speed at 25m ~ 35m / s within the selected range. For high quartz content and difficult cutting granite, remove the blade speed limit is appropriate. Granite tiles in the production, the use of smaller diameter diamond saw blade, the line speed can reach 35m / s.
(2) Feed speed: Cutting feedrate incurs stone feed rate. Its size sawing rate impact, the force and the cutting blade heat dissipation area. Its value should be based on the nature of the selected cutting stone. Generally speaking, sawing softer stone, such as marble, may be appropriate to increase the feed speed, if the feed rate is too low, more conducive to high cutting rates. Sawing fine structure, relatively homogeneous granite, may be appropriate to increase the feed speed, feed rate is too low if the diamond blade easily be polished. But sawing UNEVEN coarse granite structure, should reduce feed speed, otherwise it will cause the blade vibration and reduce fragmentation leading diamond cutting rates. Granite cutting feed rate is generally 9m ~ 12m/min within the selected range.
(3) Cutting Depth: diamond cutting depth is related to wear, effective cutting, saw cutting force conditions and the  12 inch saw blade nature of the important parameters of stone. Generally speaking, when the line speed diamond saw blade is high, should be selected for cutting of small depth, from the current technology, the cutting depth of the diamond can choose between 1mm ~ 10mm. Usually with a large diameter saw blade cutting granite blocks, the cutting depth can be controlled within 1mm ~ 2mm between the feed rate should be reduced at the same time. When the line speed diamond saw blade is large, a large cutting depth should be selected. But in performance and tool strength saw the extent permitted, should try to take a greater depth of cut for cutting to improve cutting efficiency. When the machined surface when requested, should be used small depth of cut.
Second, other factors
(1) diamond size: Common diamond size 30/35 ~ 60/80 range. The more hard rock, should be selected with a finer granularity. Because at the same pressure conditions, the more detailed the more sharp diamond, cut hard rock in favor. In addition, the general requirements of a large-diameter blade cutting efficiency is high, with the coarser particle size should be selected; small diameter cutting blade low efficiency, requiring a smooth rock cutting section should be selected fine granularity.
(2) Segment concentration: the so-called diamond concentration, the diamond in the working layer is the carcass in the density distribution. Increasing the concentration of diamond is expected to extend the life of the blade, because of the increased concentration of each piece of diamond is reduced, the average cutting force suffered. However, increasing the wet saw blades  depth of the blade will increase the cost, so there is a concentration of the most economical, and the concentration with VS shear rate increases.
(3) binding agents head hardness: In general, the higher the hardness of the binding agent, the stronger the resistance to abrasion. Thus, when a large rock abrasive cutting, the bonding agent should be high hardness; when the cutting of soft rock material, the hardness of the binding agent should be low; when large and abrasive cutting hard rock, the binding agent should be moderate hardness .
(4) force effects, temperature effects and grinding damage: cutting stone diamond saw blades in the process will be subject to centrifugal force, cutting power, cutting hot alternating load effect.

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