The catenary shot blasting machine (also known as the hook shot blasting machine) is a device that suspends the workpiece in the shot blasting machine through a hook, and sprays the shot material onto the surface of the workpiece for cleaning, rust removal, decontamination and other treatments. It is mainly used for the surface treatment of large, heavy or complex-shaped workpieces, and is particularly suitable for the surface cleaning of large pieces such as castings, forgings, steel structures, and machine tool parts. Its working principle can be divided into the following steps:

1. Workpiece hanging and conveying
The main feature of the catenary shot blasting machine is that the workpiece is suspended on an automatic or manual conveying chain through a hook, and the workpiece is hung on the chain and enters the shot blasting room. The chain will send the workpieces into the processing area one by one, and the workpieces suspended inside the shot blasting machine will move smoothly along the predetermined trajectory with the movement of the chain.

2. The shot blasting machine sprays shot material at high speed
When the workpiece enters the working area of ​​the shot blasting machine, multiple shot blasting machines start working. The shot blasting machine uses a high-speed rotating impeller to spray shot (such as steel shot, steel sand, etc.) at high speed onto the surface of the workpiece to achieve the purpose of cleaning and strengthening. Shot blasting machines usually project shot in different directions according to different needs to ensure that all parts of the workpiece surface can be evenly stressed.
Shot blasting machines are generally distributed in different positions in the workroom, and the projection angle is adjusted according to the shape, size, and processing requirements of the workpiece.
The impact force of the shot can remove the oxide scale, rust, stains and other contaminants on the surface of the workpiece.

3. Rotation and movement of the workpiece
In the catenary shot blasting machine, after the workpiece is connected to the chain through the hook, it will maintain a certain speed and direction in the shot blasting machine as the chain runs. In order to ensure that the workpiece surface can evenly receive the impact of the shot, the workpiece is usually designed to rotate or swing automatically under the action of the shot blasting machine.
The rotating or swinging workpiece can evenly receive the shot spray under the action of different shot blasting machines.
By adjusting the movement trajectory of the workpiece, it can better ensure that the surfaces at different angles and different positions can be fully cleaned.

4. Shot recovery and filtration
After cleaning the workpiece, the shot in the shot blasting machine will be recovered by gravity or suction and reused through the recovery system. The recovery system will screen and filter the shot to remove impurities and ensure that the quality of the shot is not affected.
The shot is recycled in the shot blasting machine, which reduces the consumption of shot and saves production costs.
The dust removal system can effectively remove the dust generated during the shot blasting process and keep the working environment clean.

5. Automatic control system
Modern catenary shot blasting machines are usually equipped with automatic control systems, which can adjust the working parameters of the shot blasting machine according to different production needs, such as the speed of the shot blasting machine, the amount of shot sprayed, the movement speed of the chain, etc. The automatic control system can achieve a stable production process and improve production efficiency.
The automatic system can adjust the running speed and residence time of the chain according to the size and number of the workpiece.
The control system can also monitor the operating status of the equipment and discover and solve problems in time.

Summary:

The working principle of the catenary shot blasting machine is mainly to hang the workpiece on the chain through the hook system, and the workpiece enters the working area of ​​the shot blasting machine under the drive of the chain, and then the shot is ejected at high speed through multiple shot blasters to clean the surface of the workpiece. This equipment is suitable for large, heavy or complex-shaped workpieces, and can evenly clean the surface of the workpiece. The shot is recycled through the recovery system, which reduces the consumption of shot, and improves production efficiency through the automatic control system.