Crawler shot blasting machines are widely used in metal surface treatment equipment. They can effectively clean and remove rust, scale, stains, etc. on the surface of workpieces, improve the roughness of the surface of workpieces, and enhance the effects of subsequent coating or welding processes. It is mainly suitable for the following types of surface treatment:

1. Cleaning surface rust and scale
Shot blasting machines are widely used to remove rust, scale and other stains on metal surfaces. By high-speed shot (such as steel shot, steel grit, etc.) colliding with the surface of the workpiece, rust, oxide layer and other contaminants on the metal surface can be effectively removed.
Application areas: metal workpieces such as steel, castings, forgings, aluminum alloys, etc.
Effect: Remove surface rust and oxide layer, restore metal luster, and improve surface cleanliness.

2. Strengthen metal surface (shot peening)
Shot blasting machines can also be used for shot peening of metal surfaces. High-speed shot blasting exerts impact force on the metal surface to generate compressive stress, thereby improving the hardness, corrosion resistance and fatigue resistance of the metal surface. Shot peening is widely used to improve the performance of metal parts and extend their service life.
Application areas: aerospace, automotive parts, ships, mechanical parts, etc.
Effect: Improve the hardness and wear resistance of metal surfaces, and enhance fatigue resistance and corrosion resistance.

3. Clean the sand mold residues of castings and forgings
Casting sand, iron filings or other impurities often remain on the surface of castings and forgings, which will affect the subsequent process. Shot blasting machines can effectively remove excess sand molds and other impurities on the surface of castings or forgings to ensure their finish.
Application areas: cast steel, cast iron, aluminum alloy castings, forgings, etc.
Effect: Clean the casting sand and impurities remaining on the surface of castings to improve the surface finish.

4. Remove welding spatter
Spatters are often generated during welding, and these spatters adhere to the surface of the workpiece, affecting the subsequent coating or surface treatment effect. Using a shot blasting machine can effectively remove welding spatter and make the surface of the workpiece smooth and neat.
Application areas: automobile manufacturing, steel structure, machinery manufacturing and other industries.
Effect: Remove welding spatter to ensure the quality of subsequent coating and welding processes.

5. Surface roughening (pre-coating treatment)
Shot blasting machines can also be used to roughen metal surfaces, especially before painting or spraying, the surface of the workpiece needs to be roughened to enhance the adhesion of the coating. The shot blasting machine can effectively increase the roughness of the metal surface by high-speed shot blasting, thereby improving the adhesion and peeling resistance of the coating.
Application areas: automobiles, home appliances, building materials and other industries.
Effect: By increasing the surface roughness, the adhesion of the coating is enhanced to prevent the coating from falling off.

6. Remove surface oil and stains
Shot blasting machines can also be used to remove oil and stains on the surface of workpieces, especially for some heavier oil stains. The high-speed impact of the shot can effectively remove grease, stains and other contaminants on the surface.
Application areas: steel, mechanical parts, auto parts, etc.
Effect: Remove oil and attachments on the surface of the workpiece to ensure surface cleanliness.

7. Remove burrs from the surface of workpieces
Shot blasting machines can also be used to remove burrs from workpieces, especially in the production process of castings, stampings and cut parts, where burrs may affect subsequent assembly and use. By adjusting the projectile angle and speed, the shot blasting machine can effectively remove burrs from the surface or edge of the workpiece.
Application areas: cast steel parts, aluminum alloy parts, machined parts, etc.
Effect: Remove burrs from the edges and surfaces of workpieces, make the workpiece appearance smooth, and reduce the difficulty of subsequent processing.

8. Remove surface cracks (crack detection)
In some cases, shot blasting machines can be used to remove cracks or small defects on the metal surface, especially after crack detection, the shot blasting machine can clean the defective area on the surface for subsequent repair or detection.
Application areas: cast steel, cast iron, aluminum alloy, etc.
Effect: Remove surface cracks and make them visible for subsequent repair and detection.

9. Decorative surface treatment
Shot blasting machines can also be used for some decorative surface treatments, such as gloss treatment and texture treatment of metal surfaces. By adjusting the type of shot, particle size and projection angle, the metal surface can present different effects, such as frosted effect or sandblasting effect.
Application areas: jewelry, home appliances, architectural decoration and other industries.
Effect: Increase the visual effect and decorativeness of the metal surface and enhance the craftsmanship value.

Summary:
Shot blasting machines are widely used in the following types of surface treatment:
Removing rust and scale: Improving the cleanliness of the metal surface.
Shot peening: Increase the hardness, wear resistance and fatigue resistance of the metal surface.
Cleaning sand mold residues of castings and forgings: Improving the cleanliness of the workpiece surface.
Removing welding spatter: Improving the surface quality of welded workpieces.
Surface roughening: Improving coating adhesion and enhancing coating effect.
Removing oil and stains: Ensuring the cleanliness of the workpiece surface.
Removing burrs: Improving the processing accuracy of the workpiece.
Removing surface cracks: Facilitating crack detection and repair.
Decorative surface treatment: Providing unique metal surface effects.
Shot blasting machines are widely used in metal surface treatment. They can greatly improve the surface quality of workpieces and the accuracy of subsequent processing, and enhance the overall performance and service life of products.