The industry applications of crawler-type shot blasting machines
The crawler type shot blasting machine is a classic and highly efficient shot blasting cleaning equipment for batch processing of small parts. Its working principle is to place the workpiece into a "roller" formed by a continuously rotating rubber (metal) track. During the rolling process, the workpiece is impacted by high-speed steel shot thrown out from the top shot blasting machine, thereby achieving multiple effects such as surface cleaning, rust removal, deburring, and strengthening.
Due to the high degree of automation, uniform processing and large loading capacity of the crawler type shot blasting machine, it is widely used in the following industries:
Core application industries and processing objects
1. Foundry industry (one of the largest users
Processing objects: Various metal castings (gray iron, ductile iron, cast steel, aluminum alloy, copper alloy, etc.).
Application purpose:
Cleaning: Remove the molding sand, adhered sand and oxide scale from the surface of the casting.
Surface finishing: Remove small flash and burrs to provide a clean surface for subsequent processing (such as machining and spraying).
Strengthening: Enhance the surface strength of some castings.
2. Forging and heat treatment industry
Processing objects: forgings (gear blanks, connecting rods, crankshafts, etc.), heat-treated workpieces.
Application purpose:
Clean the oxide scale: Remove the dense oxide scale (forging and rolling phosphorus scale) produced after forging or heat treatment.
Improve cleanliness: To prepare for subsequent flaw detection and fine processing.
3. Mechanical processing and automotive parts industry
Processing objects: gears, connecting rods, camshafts, springs, screws, fasteners, brake pads, pistons, pump and valve housings, etc.
Application purpose:
Deburring and flash: Remove the tiny burrs produced after machining to improve the quality and safety performance of the workpiece.
Surface cleaning: Remove oil stains and processing debris.
Surface strengthening (core application) : Through shot blasting strengthening technology, a compressive stress layer is formed on the surface of the parts, significantly enhancing their fatigue strength and resistance to stress corrosion. This is crucial for automotive engine and chassis parts that are subjected to alternating loads.
4. Hardware tools and standard parts industry
Objects to be processed: wrenches, pliers, screwdrivers, various nuts, bolts, washers, etc.
Application purpose:
Surface cleaning and finishing: Remove the oxide scale and oil stains from heat treatment to achieve a uniform matte or glossy surface.
Deburring: Ensuring the safety and feel of the product.
5. Motorcycle and bicycle parts industry
Processing objects: chains, sprockets, cranks, hubs, small brackets, etc.
Application purpose: Rust removal, oxide scale removal, deburring, and preparation for electroplating or spraying.
6. Aerospace and Precision Manufacturing (with extremely high process requirements)
Processing objects: Small precision structural components, landing gear parts, blades, etc.
Application purpose:
Precision deburring.
Stress shot blasting strengthening of key parts is carried out to extend the service life of parts under extreme conditions.
7. Crawler shot blasting machines for other industries
Rubber and plastic industry: Cleaning molds.
Powder metallurgy industry: Cleaning sintered parts.
Electronics industry: Surface cleaning and burring treatment of certain metal casings or structural components.
Summary of the advantages of crawler-type shot blasting machines
Batch processing: A large number of small workpieces can be loaded at one time, with high production efficiency.
Uniform cleaning: The workpiece keeps rolling in the track to ensure that all surfaces are treated without dead corners.
Automated process: It can usually achieve automatic feeding, shot blasting cleaning and unloading, with low labor intensity.
Versatility: By replacing shot of different materials and particle sizes (such as steel shot, stainless steel shot, ceramic shot, walnut sand, etc.), various effects ranging from powerful rust removal to precise polishing can be achieved.
It occupies a relatively small area: The equipment has a high degree of integration and is suitable for layout within the workshop.
The limitations of the crawler type shot blasting machine
Workpiece size and weight restrictions: It is usually applicable to workpieces with a single weight of less than 10kg and dimensions not exceeding the volume of the machine's working chamber. It cannot handle extremely large, extra-long or fragile thin-walled parts.
Possible collision: During the rolling process, workpieces may collide with each other. Therefore, caution should be exercised when using high-precision or already finely machined surfaces.
In conclusion, the crawler type shot blasting machine is a standardized and main type of equipment for handling "small and large quantities" workpieces in the manufacturing industry, especially playing an indispensable role in fields such as casting, automotive parts, and standard parts.