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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

Uniaxial crystal diamond cutting tools generally fix the diamond uniaxial crystal on the top of the fruit knife, and the fruit knife head is fixed on the boring tool of NC lathe with screws or nuts. The important methods of fixing the diamond on the top of the fruit knife are: industrial equipment engineering reinforcement method (grinding off the bottom of the diamond and the mixing surface, punching and fixing it on the top of the fruit knife with a nut); Powder metallurgy industrial method (put the diamond into the alloy powder, press and install it in the mechanical pump for forging and burning, so that the diamond can be fixed on the top of the fruit knife); Bonding and fiber welding method (fixing constant diamond with inorganic compound binder or other binder). Because the thermal expansion coefficient of diamond and plate is too different, diamond is easy to loosen and fall.

structure

The utility model comprises a base material and a knife body. The above base material is provided with convex edges along the disk-shaped edges, several dovetail grooves are evenly distributed along the circles of the above convex edges, disordered horn shaped convex wedges are arranged in the middle of two adjacent horn shaped concave grooves, and rib plates are arranged in the middle ring between the root of the convex edges and the bottom of several concave grooves. The above knife body is fixed by the horn shaped concave grooves On the convex ridge composed of horn shaped convex wedge and rib plate.

characteristic

Due to the adoption of the above structure, when the tool body prevents forging and burning at the convex ridge, the tool body can not only fix the tool body on the base material according to the reverse buckle effect of the horn shaped concave groove, but also improve the fixing surface between the tool body and the base material by combining the two sides of the horn shaped convex wedge and rib plate with the surface of the core rod of the tool body, Thus, the firmness of the connection between the knife body and the substrate and the reliability of application are completed.