Big Rotary Table Shot Blasting Machine For Large Heavy Metal Parts Blasting

The big rotary table shot blasting machine is a heavy-duty surface treatment equipment integrating a large-diameter rotary workbench, high-speed shot blasting system, abrasive recycling system and dust removal system. It is designed for batch surface strengthening and cleaning of large, heavy, or irregularly shaped workpieces, realizing 360° uniform shot blasting without manual workpiece turning. Widely used in heavy machinery, casting, and aerospace industries, it is a core device for improving workpiece surface quality and fatigue resistance.
Below is a detailed overview of its core capabilities, typical applications, common models, and key technical specifications.

Compared with standard rotary table shot blasting machines, the "big" version is optimized for heavy-load bearing, large-workpiece compatibility, and high-efficiency uniform treatment, with the following core functional capabilities:

1. 360° Uniform Surface Cleaning & Strengthening
   • The large rotary workbench drives workpieces to rotate at a controllable speed (0.5–5 r/min) while multiple high-power shot blasting turbines (blast wheels) launch steel shots/grit at high speed (80–120 m/s) from different angles. This achieves full coverage of the workpiece surface, effectively removing rust, scale, burrs, casting sand, and oxide layers.
   • Simultaneously, it forms a dense compressive stress layer on the workpiece surface, improving fatigue strength and corrosion resistance (e.g., extending the service life of gearboxes, engine blocks, and heavy-duty structural parts by 2–3 times).
2. Heavy-Load & Stable Workpiece Handling
   • Equipped with a reinforced rotary workbench (thickened steel plate welding + precision bearing support), it can bear a single workpiece weight of 5–100 tons (customizable up to 200 tons for ultra-heavy workpieces). The table surface is covered with wear-resistant rubber or manganese steel liners to prevent damage to the workpiece bottom and extend the table service life.
   • The rotary system adopts frequency conversion speed regulation, with stable rotation without vibration, ensuring uniform shot blasting for large workpieces with uneven weight distribution (e.g., large casting molds, hydraulic press frames).
3. High-Efficiency Abrasive Recycling & Circulation
   • After shot blasting, used abrasives (steel shot S330–S660, steel grit G10–G40, etc.) fall into the bottom hopper of the machine. The system uses a screw conveyor + bucket elevator to transport abrasives to a vibrating screen for classification: qualified abrasives are sent back to the blast wheels for reuse, while impurities (sand, slag, dust) are filtered out.
   • The abrasive recycling rate reaches ≥95%, reducing material waste and operating costs. The closed-loop circulation design avoids abrasive spillage and secondary pollution.
4. High-Standard Dust Collection & Environmental Protection
   • Configured with a pulse bag-type dust removal system (matching air volume of 10,000–150,000 m³/h) to capture dust generated during shot blasting in real time. The dust collection efficiency is ≥99.9%, and the emission concentration is ≤30 mg/m³, meeting strict industrial environmental protection standards.
   • The machine body adopts a sealed structure with rubber sealing strips at the door and table gaps, preventing dust overflow and ensuring a clean workshop environment.
5. Flexible & Intelligent Operation Control
   • Supports semi-automatic and fully automatic operation modes:
     • Semi-automatic: Manual loading/unloading, PLC-controlled shot blasting time (1–30 min adjustable), and rotary speed.
     • Fully automatic: Integrated with robot loading/unloading systems, automatic workpiece positioning, and real-time monitoring of shot blasting parameters (abrasive flow rate, blast wheel speed). It can automatically adjust parameters according to workpiece size and surface requirements.
   • Equipped with interlock protection (door-blast wheel interlock, overload protection, emergency stop button) to ensure operation safety.
6. Low Maintenance & Durable Structure
   • Key components (blast wheel blades, impellers, liners) are made of high-chromium alloy steel with high wear resistance, with a service life of 2,000–5,000 hours (3–5 times longer than ordinary steel parts).
   • Modular design of the shot blasting system and recycling system allows quick disassembly and replacement of worn parts, reducing maintenance downtime.

Models are defined by workbench diameter, maximum load capacity, and number of blast wheels, with the following common standardized models (customizable for non-standard requirements):

The big rotary table shot blasting machine is tailored for large, heavy workpieces that require overall surface treatment and is widely used in the following industries:

1. Casting & Forging Industry
   • Surface cleaning of large casting parts (engine blocks, gearboxes, machine tool beds, pump bodies) to remove casting sand, burrs, and oxide scale; surface strengthening of forging parts (crankshafts, connecting rods, heavy-duty gears) to improve mechanical properties.
2. Heavy Machinery & Construction Equipment Industry
   • Shot blasting treatment of excavator booms, loader frames, crane main beams, and hydraulic cylinder bases; pre-coating surface roughening to enhance coating adhesion and prevent corrosion.
3. Aerospace & Defense Industry
   • Surface strengthening of large aerospace structural parts (rocket engine casings, aircraft landing gear components) and equipment parts (tank chassis, artillery barrels) to improve fatigue resistance under extreme conditions.
4. Wind Power & Energy Equipment Industry
   • Surface cleaning and strengthening of wind turbine hubs, generator bases, and large flange plates; ensuring the surface quality of key components for long-term outdoor operation.
5. Shipbuilding & Marine Engineering Industry
   • Treatment of large ship accessories (propeller hubs, rudder blades, marine engine blocks) to remove rust and scale, and enhance corrosion resistance in marine environments.
6. Mold Manufacturing Industry
   • Cleaning and polishing of large injection molds, die-casting molds, and stamping molds; removing mold surface residues to extend mold service life and improve product surface finish.