Metal deformation conditions are good, spinning due to the rotating wheel and metal contact near point contact, so the contact area is small, the unit pressure is high, up to 2500~3500MPa or more, so
1.Metal deformation conditions are good, spinning due to the rotating wheel and metal contact near point contact, so the contact area is small, the unit pressure is high, up to 2500~3500MPa or more, so spinning is suitable for processing high-strength difficult to deform materials, and the total deformation force required is small, so that the power consumption is greatly reduced. Processing the same size of the parts, the tonnage of the spinning machine is only about 1/20 of the tonnage of the press.
2. A wide range of products, according to the ability of the spinning machine can produce large-diameter thin-wall pipes, special pipes, variable section pipes and spherical, hemispherical, elliptical, curved bus and almost all rotating system parts with ladder and change thickness, such as rocket, missile and satellite nose cone and shell; Submarine penetration seals and torpedo housings, radar mirrors and searchlight housings; Jet engine fairing and prime mover parts; Hydraulic cylinder, compressor shell and cylinder; Turbine shaft, nozzle, TV cone, combustion chamber body and bellows; Tumblers for dryers, mixers and washing machines; Shallow dish shape, hemispherical head, milk cans and hollow thin wall daily necessities.
3. High material utilization rate, low production cost, spinning processing compared with machining, can save materials 20%~50%, up to 80%, so that the cost is reduced by 30%~70%.
4.. The performance of the product is significantly improved, and the microstructure and mechanical properties of the material are changed after spinning, and the grain size is fine and the characteristics of fiber are formed. Tensile strength, yield strength and hardness are improved, the strength can be increased by 60% to 90%, and the elongation is reduced.
5. Low surface roughness and small dimensional tolerance. The surface roughness of spinning products can generally reach 3.2~1.6μm, the best can reach 0.4~0.2μm, and after multiple spinning can reach 0.1μm.
6. an important feature of metal spinning is the production of integral seamless rotary hollow parts, which fundamentally eliminates the shortcomings of discontinuity, strength reduction, brittleness and tensile stress concentration related to welding.
7. Compared with sheet metal stamping, metal spinning can greatly simplify the equipment used in the process, some parts that need 6-7 stamping times can be manufactured by spinning once, and the spinning machine is cheaper than the stamping machine.
8. metal spinning method can make ultra-wide plate, the method is to spin the cylindrical part along the direction of the bus cut flat. In China, the spinning machine that can spin φ2m cylindrical parts is not very large equipment, and it is easy to make 6m wide plates with such equipment, but the traditional rolling method needs a considerable rolling mill to produce 3m wide plates. The United States uses the spinning process to produce 7.5m wide and 9m long ultra-wide plates.
9. in the spinning process, because the spun blank is approximately deformed point by point, so any slag inclusion, sandwich, cracks, sand holes and other defects are easily exposed. In this way, the spinning process also plays a role in the inspection of the product.
10. the billet source is wide, can use hollow stamping parts, extrusion parts, castings, welding parts, machined forgings and rolled parts and round plates as billets, and can spin titanium, molybdenum, tungsten, tantalum, niobium a class of hard to deform metal and its alloys. Disadvantages of spinning process）
