Forging Method [Forging Process] is to provide mechanical parts in mechanical manufacturing business one of the main processing method of the blank.By forging, denial only tin get the shape of the mechanical parts, and can improve the metal internal organization, improve the mechanical properties and physical properties of metal.The general bludgeon big, high requirements of important mechanical parts, mostly manufactured forging production methods., impeller, such as the steam turbine generator shaft, rotor blade, maintaining rings, large hydraulic squash stud and high pressure cylinder, rolling mill roll, the internal combustion engine crankshaft, connecting rod, gears, bearings, and artillery in the defense industry and other important parts adopt forging production.
Forging production, therefore, widely used in metallurgy, mining, automobile, tractor, harvest machinery, petroleum, chemical industry, aviation, spaceflight, weapons and other industries, is in daily life, forging production also has an important position.
Free Forging Forging [Free] used simple tools and equipment, splendid versatility, low cost.Compared with the casting blank, free forging eliminates the defects such as shrinkage cavity, shrinkage, porosity, shape blank has higher mechanical properties.Forging shape is simple, flexible operation.Therefore, it is important parts on the manufacturing of important machinery and has special important meaning.Free forging is to depend on manual operation to control the shape and size of the forgings, precision forging, lower machining allowance is large, the intensity of labor is big, the productivity is not sharp also, so it is mainly used in the hecatomb like distinct segment and small batch production.
Shell pattern casting [shell mold casting] made thin armor casting resin warp or shell base can significantly reduce the amount like used sand, casting outline clear, iron surface, size accurate, do not need mechanical processing or only a small amount of processing.Especially suitable for large production batch so shell mould castings, supernal dimension accuracy requirement, thin wall and complex shape of various alloy castings.But shell fungus casting used resin is expensive, the template stum afsluiting precision machining, high cost, still can produce excitative smell whereas pouring, to some extent limited the extensive application of this method.The resin sand core pod can be made in association with ordinary sand mold or metal cast all kinds of castings.
Nonferrous metal Casting Process [Non – Ferrous Casting Process] Process include: metal melting, archetypical manufacturing, Casting solidification et alii demoulding cleaning, etc.The main material is cast steel, slough iron foundry, casting non-ferrous alloy (copper, aluminum, zinc, lead, etc.), etc.Metal mold can use gravity casting, pressure casting can be adopted.The metal mold casting mould receptacle be used repeatedly, every pouring liquid metal, equally a casting, long setting life, high production efficiency.Metal mold casting dimension precision not only, the surface is bright and clean, and in the case of the same casting metal, its strength is higher than sand mould castings, more is not easy to damage.Therefore, in the mass production of nonferrous metals in medium and small castings, high melting point, however, as long as the casting material is generally preferred to pick metal mold casting.Metal mold casting, however, also has some disadvantages: because of the heat unsusceptible alloy nerve and on it make a hollow cavity machining are expensive, so the metal mold mold is expensive, but the total compared with die casting mould cost is much cheaper.For small mixture production, allocation to each product on the mould cost is obviously too high, the general is not easy to accept.And since the mould by the mould facts sizableness regarding metal mold including mold processing equipment, casting equipment capacity constraints, so the special spacious castings were powerless.Thus in small volume and large production, rarely accepted metal mold casting.In addition, although the metal mould should adopt alloy steel, heat-resistant ability is limited, expanded commonly used in aluminum alloy, zinc alloy, magnesium alloy casting, has been diminished used in copper alloy casting, it is less used in ferrous metal casting
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