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shot blasting machine, high-speed projectiles thrown by the blast wheel cleaning or strengthen the casting surface of the casting equipment. Shot Blasting function while casting off the sand, in addition to the core and clean up.
The shot blasting machine to crack down on the metal surface through one or more of the sand material, eliminate some of the attachments of the metal surface, such as rust, but sometimes crashing through shot blasting to obtain a specific surface layer. The shot blasting media can be a variety of sand, silicon carbide particles, small ball. Steel grit shot blasting machine throws the fight against the surface of the object by rotating blades,
Metal surface cleaning
Shot blasting equipment used in the foundry industry first cast steel, cast iron surface adhering sand, and the removal of the oxide skin
Almost steel castings, gray castings, malleable, ductile iron parts should be carried out blasting treatment. This is not only to clear the casting surface oxide and the sticky sand casting quality check an indispensable preparatory process, such as large-scale gas turbine casing during before the nondestructive testing must be rigorous throwing shot peening cleaning, to ensure that the testing results reliability. In general casting production, throwing the shot blasting casting surface defects such as pinhole, slag hole and the sticky sand, cold shut, from the skin, such as the essential means of technology. Non-ferrous metal castings, such as the surface of the aluminum alloy, copper alloy, such as cleaning, in addition to remove oxide scale, found the casting surface defects, but the main purpose is to throw the shot peening to clean the surface quality die casting burrs and get decorating significance to obtain the combined effect. The production of iron and steel metallurgy, throwing the shot blasting or pickling is to ensure that the steel mass production to get high productivity and the use of mechanical or chemical joint to phosphorus removal the skin of a technological method. Silicon steel, stainless steel sheet and other alloy steel plate, with the production, must be annealed after shot blasting or pickling treatment, to ensure that the surface roughness and thickness accuracy of the cold-rolled steel in the process of cold rolling process.
Strengthening of the metal workpieces
According to the modern theory of metal strength, an increase dislocation density of the metal within the main direction is to improve the strength of metal. Practice has proved that the shot blasting is to increase the effective process for metal dislocation structure. Phase transition of some metals can not be hardened (eg, martensitic hardening, etc.) or transformation hardening on the basis of request further strengthen the workpiece, but also has great significance. Aviation, aerospace industry, automobile, tractor parts require light, but the reliability of the increasingly high demand, an important process measure is used to throw the shot peening process to improve the strength and fatigue strength of components.