Introduction to diamond cutting discs
Diamond cutting is a cutting tool widely used in the processing of hard and brittle materials such as stone, concrete, prefabricated panels, new and old roads, ceramics. The diamond cutting disc is mainly composed of two parts; the base body and the cutter head. The base body is the main support part of the bonding cutter head, and the cutter head is the part which is cut during use. The cutter head is continuously consumed in use, and the base body does not. The cutter head can cut. The role is because it contains diamond, which is the hardest material at present, and it rubs and cuts the object to be processed in the cutter head. The diamond particles are wrapped in metal inside the cutter head.
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Diamond cutting disc manufacturing process
1. Sintered diamond cutting disc: divided into cold pressing sintering and hot pressing sintering, which are pressed and sintered.
2. Welded diamond cutting disc: divided into high frequency welding and laser welding. The high frequency welding welds the cutter head and the base body through a high temperature melting medium. The laser welding melts the contact edge of the cutter head and the base by a high temperature laser beam to form a metallurgical bond. .
3. Electroplated diamond cutting disc: The cutting head powder is attached to the substrate by electroplating.
Diamond cutting sheet classification
1. Continuous edge saw blade: continuous sawtooth diamond cutting disc, generally made by sintering method. Commonly used bronze binder is used as the base carcass material. Water must be added during cutting to ensure the cutting effect, and the type of slit is cut by the laser.
2, the cutter head type cutting disc: the saw tooth is broken, the cutting speed is fast, and it is suitable for the dry and wet cutting methods.
3, turbine type cutting disc: combined with the advantages of the first two, two, the sawtooth continuously presents a turbine-like uniform convex and concave, which improves the cutting speed and increases the service life.
Different materials use different types of diamond saw blades. Different powder formulations are suitable for different materials, which have a direct impact on the quality, effect, qualification rate and even cost and benefit of the material products.
Factors affecting the efficiency and life of diamond circular saw blades are sawing process parameters and diamond particle size, concentration, bond hardness and the like. According to the cutting energy, there are saw blade line speed, sawing concentration and feed speed.
Processing range
1. Suitable for cutting of terrazzo marble.
2. Cutting of cement pavement, hard refractory materials and non-metallic materials.
3. Slotting on the road, bridge, and river channel.
4. The engraving of the road surface and the bridge surface by the road engraving.
5. Widely used in municipal construction, road reconstruction, airport runway construction, concrete pavement and other construction sites, especially suitable for professional cutting operations such as asphalt and concrete pavement cutting.
Sawing parameters
In practice, the linear speed of a diamond circular 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 circular saw blade is small, and the linear velocity can reach 35m/s.
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Diamond cutting disc feed speed
The feed rate 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~12m/min.
Tool classification
(1) Abrasives - including fixed abrasives, coated abrasives and loose abrasives, such as grinding wheels, sand tiles, honing grindstones, shaped grinding heads, diamond abrasive belts, fine grinding pellets, abrasive pastes, etc.
(2) Sawing tools - divided into two categories: one is sawing granite, marble, concrete, circular, band saw, gang saw, wire saw, etc.; the other is cutting the inner circle of metal and semiconductor materials. cutting discs and outer cutting discs.
(3) Drilling tools – including drills, reamers, and construction drills for exploration and opening in the geological, petroleum, coal, and metallurgical sectors.
(4) Cutting tools - diamond polycrystalline composite sheets or natural large single crystals made of turning tools, boring tools and milling cutters for finishing non-ferrous metal parts on automobiles, airplanes, precision machinery, plastics, ceramics, etc. Non-metallic materials.
(5) Dressing tools - forming the dressing roller, correcting the pen, trimming the block.
(6) Drawing die——Diamond polycrystal is made into drawing die, and various metal filaments such as wire, filament and sieve wire are drawn.
(7) Other tools - scribing knives, glass knives, engraving knives, nesting knives, assorted enamels, gage probes, bearings, styluses, diamond scalpels, etc.
(8) Special instrument components - hardness tester, surface roughness tester, high pressure cavity anvil, internal combustion engine nozzle, high power transistor, infrared window, microwave, laser, diamond heat sink in large scale integrated circuit, Resistance thermometers, etc.