(1) Shot Blasting Chamber
The shot blasting chamber is the heart of the H beam shot blasting machine. It is designed to contain the shot blasting process and protect the surrounding environment from the abrasive particles. In Chinese made machines, the shot blasting chamber is typically constructed from high quality steel plates. These plates are often lined with wear resistant materials, such as manganese steel or rubber, to extend the lifespan of the chamber. The size of the shot blasting chamber varies depending on the size of the H beams that the machine is designed to process. For example, some large scale machines in China can accommodate H beams with cross sectional dimensions of up to 1200 mm × 1800 mm or even larger.
(2) Shot Blasting Devices
There are two main types of shot blasting devices used in H beam shot blasting machines: wheel type and nozzle type. Wheel type shot blasting devices, also known as impellers, are widely used in China due to their high efficiency. These impellers consist of a rotating disk with blades. The abrasive is fed into the center of the disk and is then accelerated by the centrifugal force created by the rotation of the disk. Nozzle type shot blasting devices, on the other hand, use compressed air to accelerate the abrasive through nozzles. Nozzle type devices are often used for more precise shot blasting applications or when dealing with complex shaped H beams. In Chinese made machines, both types of shot blasting devices are designed to be highly reliable and efficient, with features such as easy maintenance and adjustable shot blasting parameters.
(3) Workpiece Transport System
The workpiece transport system is responsible for moving the H beams in and out of the shot blasting chamber. In most H beam shot blasting machines in China, a roller type conveyor system is used. This system consists of a series of rollers that are powered by electric motors. The H beams are placed on the rollers, and the motors drive the rollers to move the beams through the shot blasting chamber at a controlled speed. The conveyor speed can be adjusted according to the specific requirements of the shot blasting process. For example, for thicker H beams or when a more intensive shot blasting treatment is required, the conveyor speed can be reduced to ensure that the surface of the beam is thoroughly cleaned.
(4) Shot Circulation System
As mentioned earlier, the shot circulation system is crucial for the efficient operation of the H beam shot blasting machine. This system includes components such as elevators, screw conveyors, and separators. The elevators are used to lift the used abrasive from the bottom of the shot blasting chamber to a higher level, where it can be fed into the separator. Screw conveyors are used to transport the abrasive horizontally between different components of the system. The separator, which is often a key component in Chinese made machines, uses a combination of gravity, air flow, and mechanical separation methods to separate the clean abrasive from dust, fines, and other impurities. The clean abrasive is then returned to the storage hopper for reuse.
(5) Dust Removal System
Shot blasting processes generate a significant amount of dust, which can be harmful to the environment and the health of workers. Therefore, H beam shot blasting machines in China are equipped with advanced dust removal systems. These systems typically use a combination of cyclone separators and bag filters. The cyclone separator first removes the larger dust particles by using centrifugal force. The remaining fine dust particles are then captured by the bag filters. The filtered air is then released into the atmosphere, ensuring that the workplace environment meets the required environmental and safety standards.
(6) Electrical Control System
The electrical control system of an H beam shot blasting machine in China is designed to provide precise control over all the components of the machine. It allows operators to set and adjust parameters such as shot blasting intensity, conveyor speed, and abrasive flow rate. Modern Chinese made machines often use programmable logic controllers (PLCs) as the core of their electrical control systems. PLCs offer high reliability, flexibility, and ease of operation. They can be programmed to control complex sequences of operations, and they also provide real time monitoring and diagnostic functions. This enables operators to quickly identify and troubleshoot any issues that may arise during the shot blasting process.
Applications of H Beam Shot Blasting Machines in China
(1) Construction Industry
In the construction industry, H beams are widely used in the construction of buildings, bridges, and other infrastructure projects. Before these H beams can be used, they need to have a clean and prepared surface. H beam shot blasting machines in China are used to remove rust, scale, and other contaminants from the surface of the H beams. This not only improves the appearance of the beams but also ensures that the paint or coating applied to the beams adheres properly. A well prepared surface also enhances the corrosion resistance of the H beams, which is crucial for the long term durability of the structures. For example, in the construction of high rise buildings, shot blasted H beams are used to form the structural framework. The shot blasting process helps to ensure that the beams can withstand the heavy loads and environmental conditions over their service life.
(2) Automotive Industry
The automotive industry also makes use of H beam shot blasting machines in China. H beams are used in the manufacturing of certain automotive components, such as chassis parts and suspension components. Shot blasting is used to clean and strengthen the surface of these components. By removing rust and scale, shot blasting helps to prevent corrosion, which is especially important in automotive applications where components are exposed to various environmental factors. The shot blasting process also improves the fatigue resistance of the components, ensuring their reliable performance under the dynamic loads experienced in vehicle operation. In addition, the surface roughness imparted by shot blasting can improve the adhesion of coatings, which are often applied to automotive components for aesthetic and protective purposes.
(3) Shipbuilding Industry
In shipbuilding, H beams are used in the construction of the ship's hull and internal structures. The marine environment is highly corrosive, so it is essential that the H beams used in shipbuilding have a high quality surface finish. H beam shot blasting machines in China are used to thoroughly clean the surface of the H beams, removing any rust, scale, or contaminants. This is followed by the application of anti corrosion coatings. The shot blasting process not only improves the adhesion of the coatings but also enhances the overall strength and durability of the H beams. By using shot blasted H beams in shipbuilding, shipbuilders in China can ensure the safety and longevity of the vessels they construct.
(4) General Manufacturing Industry
The general manufacturing industry in China also benefits from the use of H beam shot blasting machines. In various manufacturing processes, H beams may be used as structural components or as part of machinery and equipment. Shot blasting is used to prepare the surface of these H beams for further processing, such as welding, painting, or assembly. The shot blasting process can improve the quality of the final product by ensuring that the surface of the H beam is clean, smooth, and free of defects. It can also enhance the mechanical properties of the H beam, making it more suitable for use in demanding applications.
