Coal Mine Mechanical Shot Blasting Machine

Coal mine mechanical shot blasting machine is a casting equipment for cleaning or strengthening the surface of castings for coal mine machinery.Remove the rust layer, welding slag and scale on its surface, eliminate the internal residual stress, and make it obtain a uniform and uniform metallic luster, so as to improve the quality of the steel coating and anti-corrosion effect. Casting equipment that uses high-speed projectiles thrown by a shot blaster to clean or strengthen the surface of castings. The shot blasting machine can perform sand falling, core removal and cleaning on the casting at the same time. Some areas are also called sandblasters and sandblasters verbally.

Surface cleaning

The shot blasting equipment is firstly used to remove the sticky sand and scale on the surface of cast steel and cast iron in the foundry industry. Almost all steel castings, gray castings, malleable steels, ductile irons, etc. must be shot blasted. This is not only to remove scale and sticky sand on the surface of castings, but also an indispensable preparation process before casting quality inspection. For example, large gas turbine casings must undergo strict shot blasting before nondestructive testing to ensure the results reliability. In general casting production, shot blasting is an indispensable process for discovering casting surface defects such as subcutaneous pores, slag holes, and sticky sand, cold partitions, and peeling. The surface cleaning of non-ferrous metal castings, such as aluminum alloys and copper alloys, in addition to removing oxide scales and found surface defects of castings, the main purpose is to remove burrs from die castings and obtain decorative surface quality by shot peening To get a comprehensive effect. In metallurgical iron and steel production, shot blasting or pickling is a process method that uses mechanical or chemical joint removal of phosphor scale to ensure high productivity in the mass production of iron and steel. In the production of silicon steel sheets, stainless steel sheets, and other alloy steel plates and belts, shot blasting or pickling treatment must be performed during the cold rolling process to ensure the surface roughness and thickness accuracy of the cold rolled steel plates.

Workpiece strengthening

According to modern metal strength theory, increasing the dislocation density inside the metal is the main direction to increase the metal strength. Practice has proved that shot blasting is an effective process method for increasing metal dislocation structure. This is of great significance to workpieces that require further strengthening on the basis of transformation hardening (such as martensitic quenching, etc.) or achieving transformation hardening. Aviation, aerospace industry, automobiles, tractors and other parts require light weight, but the reliability requirements are getting higher and higher. The important process measure is to use shot blasting technology to improve the strength and fatigue strength of components.

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