A shot blasting machine uses high-speed projectiles to clean or strengthen the surface of a workpiece. Its operating principle is that a motor-driven impeller rotates at high speed, propelling the projectiles (such as steel and cast iron shots) from the blast wheel. These projectiles strike the workpiece surface at high speed, removing scale, rust, and other impurities while simultaneously generating compressive stress on the workpiece surface, improving fatigue strength and corrosion resistance. Shot blasting machines are widely used in industries such as casting, forging, automotive, shipbuilding, and steel structures.
The operation of a shot blasting machine primarily involves the following steps:
1. Shot supply: Shots are fed into the shot blasting machine's distributor via an elevator or screw conveyor;
2. Shot acceleration: The distributor evenly distributes the shots onto the impeller, which rotates at high speed (typically 2000-3000 rpm) to eject the shots;
3. Shot impact: The shots impact the workpiece surface at high speed (typically 60-80 m/s), completing the cleaning or strengthening process;
4. Shot recovery: The impacted shots and removed impurities are conveyed through a conveyor system to a separator, where the separated shots can be recycled.
The shot blasting machine's core component is the shot blasting machine, and its performance directly impacts the blasting results. The impeller is typically made of highly wear-resistant material to ensure long-term, stable operation. Furthermore, the shot blasting machine is equipped with a dust removal system to collect dust generated during the cleaning process, ensuring a clean working environment.
