Q38 Continuous Shot Blasting Machine for Surface Treatment of Various Castings in Sand Casting

It is suitable for surface cleaning or strengthening treatment of medium and small castings and forgings in locomotives, motors, casting, construction, machine tools and other industries. It is especially suitable for surface cleaning and shot blasting of multi-variety, small-batch castings, and steel structural parts to remove a small amount of sand core, sticky sand and oxide scale on the surface of the workpiece; suitable for slender, thin-walled parts that are not suitable for collision Clean up.
The hook-through shot blasting machine can be designed and manufactured according to the size of the shot blasting workpiece. The workpiece is cleaned by shot blasting at one time, which can not only remove the rust, welding slag, welding beans, oxide layer, impurities, dust, etc., on the surface of the workpiece, exposing the metal color, and at the same time make the polished surface, the machined surface and other surfaces form a uniform surface State and roughness. It can also eliminate the welding stress of the workpiece, improve the fatigue resistance of the workpiece, increase the adhesion of the paint film when the workpiece is painted, and finally improve the entire structure
The purpose of surface and inner quality.
The quality requirements for the shot blasting of the surface of the steel workpiece: the area coverage of the shot can reach 100%.
It can complete feeding, fast running to the front sealed chamber, frequency conversion speed and slow shot blasting cleaning, fast running to the rear sealed chamber, and the hook automatically returns to the feeding station through the track.
The layout of the shot blasting chamber and the shot blasting device are determined after the computer three-dimensional dynamic ejection simulation.
The electrical system is controlled by a "programmable controller" PLC. To
The hoist, separator, screw, and pulse detection device can realize automatic fault detection and alarm function.
The secondary dust removal method is adopted to ensure the dust removal effect (settling chamber + pulse back-blowing bag filter). To
The main wearing parts are made with new precision casting technology to ensure the long-term use of wearing parts.
In discrete manufacturing industries such as locomotives and castings, the surface treatment of multi-variety small batch workpieces faces the pain points of low efficiency and cleaning dead corners. The hook-type shot blasting machine achieves a breakthrough progress of 99.8% single-time qualified rate and 35% energy consumption reduction through 360° dead-angle shot blasting and PLC intelligent control system, becoming the preferred equipment for surface strengthening of small and medium-sized castings and forgings (weight 50-2000kg). This article deeply analyzes the equipment technical parameters, process adaptation logic and 20+ industry application data, providing enterprises with a full process guide from workpiece detection to process verification.


1. Core technology breakthrough: 3D dynamic simulation and precise shot blasting control
The hook-type shot blasting machine reconstructs the surface treatment quality through shot blasting trajectory simulation and dual-mode dust removal system:
Intelligent shot blasting system
3D shot flow field simulation:
Based on ANSYS Fluent software to simulate the shot incident angle (30-85° adjustable), the coverage rate is increased to 100%;
For shaft parts with a slenderness ratio of >8:1, a spiral blasting mode (speed 4-8rpm) is adopted, and the surface roughness is Ra2.5±0.3μm.
Multi-station collaborative operation:
Dual hooks alternate in and out (switching time <30 seconds), and the processing efficiency reaches 150 pieces/shift;
Special mode for thin-walled parts (thickness <3mm): the shot speed is reduced to 45m/s, and the deformation is <0.1mm.
Dust removal and purification system (in compliance with GB 16297-2023):


2. Secondary dust removal configuration:
Pre-dust removal in the settling chamber (removes particles > 50μm, with an efficiency of 85%);
Pulse back-blowing bag dust removal (filtration accuracy 1μm, emission concentration <5mg/m³).


3. Industry application scenarios and process adaptation solutions
Locomotive gearbox strengthening treatment:
Adopt steel shot (S550) + wire cut shot mixed abrasive (hardness HRC50-55);
Shot blasting intensity 0.25mmA, increasing fatigue life by 3 times (ISO 1143 standard).
Building steel structure weld cleaning:
Weld slag removal mode: shot speed 75m/s, coverage 100%;
Dust removal system air volume 12000m³/h, dust concentration real-time monitoring and linkage start and stop.
Precision processing of machine tool guide rails:
Special nylon abrasive (Mohs hardness 3.5), surface roughness Ra1.6;
Equipped with a visual inspection system (accuracy 0.01mm) to automatically determine the cleaning effect.


4. Enterprise selection needs to focus on evaluation:
Workpiece adaptability: Shaft parts with a slenderness ratio of >10:1 require customized special hangers;
Environmental protection requirements: Prioritize the secondary dust removal configuration with dust emission <5mg/m³;
Intelligence: Equipment with automatic abrasive replenishment and fault diagnosis functions can reduce operation and maintenance costs by 30%;