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Characteristics and manufacturing method of diamond blade
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Characteristics and manufacturing method of diamond blade




Diamond blade is a common laser cutting tool, which is widely used in the production of hard and brittle raw materials such as natural marble and pottery Diamond blade is mainly composed of two parts; Plates and blades The plate is an important fulcrum part of the bonding blade, and the blade plays a part of laser cutting in the whole process of application. The blade will continue to consume in application, while the plate is not easy. The blade can usually turn on the role of laser cutting because it contains diamond. Diamond, as a hard chemical at present, rubs in the blade. Laser cutting is the overall goal of production and manufacturing Diamond fine particles are wrapped in the blade by metal composites In the whole process of application, the green body of metal composite material is consumed together with diamond. Generally, the ideal situation is that the green body of metal composite material is consumed faster than refined steel, which can not only ensure the sharpness of the blade, but also ensure the long service life of the blade





With the rapid development of cars, international airlines and aerospace, the requirements for raw material characteristics and manufacturing professionalism are increasing. New materials such as carbon fiber polyurethane elastomer raw materials, fine particle lifting metal composite matrix fiber materials (PRMMC) and structural ceramics have been widely used. This kind of raw material has the characteristics of high tensile strength, good wear resistance and low coefficient of thermal expansion, which makes the service life of cutting tools very short when machining them. The design and development of new wear-resistant and stable superhard milling tools is a research topic of technological innovation in many colleges and universities, scientific research institutions and companies. Diamond integrates many excellent characteristics such as theoretical mechanics, optoelectronic devices, thermology, acoustic materials and optoelectronic devices. It has very high compressive strength, low friction, high thermal conductivity, low thermal expansion coefficient and analytical chemical ductility. It is an ideal raw material for the production and processing of cutting tools.



At present, there are four important production and manufacturing methods of diamond: plastic film coated tool, thick film diamond arc welding tool, diamond calcined body tool and uniaxial crystal diamond tool.


Plastic film coated cutter


Plastic film coated cutting tools are made of diamond plastic films deposited by analytical chemical high performance liquid deposition (CVD) on team raw materials with good bending stiffness and high temperature characteristics.


Because the thermal deformation system of Si3N4 ceramics, WC Co cemented carbide tools and metal composite W is close to diamond, the thermal stress caused by film making is small, so it can be used as the raw material of plate for tool body. In WC Co cemented carbide cutting tools, the existence of adhesive phase CO is easy to cause Calcined Petroleum Coke between diamond plastic film and plate and reduce the adhesive tensile strength. Preparation and solution shall be carried out before stacking to eliminate the damage of CO (generally remove CO by acid corrosion).


Analytical chemistry high performance liquid phase stacking method uses a certain method to activate the acetylene gas containing C source. Under very low gas pressure, oxygen molecules accumulate in a certain area. Oxygen molecules cause diamond phase in the whole process of team cohesion and accumulation. At present, CVD methods used to deposit diamond mainly include microwave oven heating, hot filament, DC regulated power supply arc eruption method and so on.


Every kind of diamond shaped plastic film has the advantage of fried dough twist, cutter and reamer and twist drill. It can be used to mill many non-metallic materials. During milling, the cutting amount is small, the deformation is small, the work is stable, the damage is slow, and the workpiece of commercial products is not easy to deform. It can be finished with good raw materials and small standard tolerance. The important disadvantage is that the adhesion between diamond plastic film and plate is poor, and the diamond plastic film cutter does not have regrinding property.


Diamond thick film arc welding tool


The manufacturing process of diamond thick film arc welding tool generally includes: large-scale preparation of diamond film; Cut the diamond film into the shape, specification and model of the tool; Arc welding of diamond thick film and cutting tool plate raw materials; Grinding and polishing of milling edge of diamond thick film cutter. (1) Preparation of thick diamond film and laser cutting


The common method for preparing diamond thick film is DC power plasma high pressure water jet CVD. The diamond is stacked on the WC Co aluminum alloy profile (the surface is manufactured by mirror glass sandwich glass production), and the diamond film automatically falls down in the whole process of plate cooling. This method has a faster stacking rate (930) μ M / h), the lattice constant is closely combined in the middle, but the growth and development surface is relatively uneven. Diamond film has high compressive strength, wear resistance and non conductivity, so its laser cutting method is fiber line laser cutting (laser cutting can be carried out in the geographical environment of vapor, CO2 and argon). Using fiber line laser cutting can not only cut the diamond thick film into the necessary shape and specification, but also cut the back corner of the tool. It has the advantages of narrow slit and high efficiency.

Diamond calcined tool


The diamond thick film is produced by extrusion and grinding, and the average particle size analysis is 32 ~ 37 μ M diamond crystal or diamond crystal obtained immediately by high-pressure method. The crystal powder is deposited on wc-16wt% Co aluminum alloy profile, and then it is protected with TA foil. It is calcined at 5.5gpa and 1500 ℃ for one hour to make diamond calcined body. The turning tool formed by this calcination management body has high wear resistance.



Uniaxial crystal diamond tool




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