The working principle of Crawler-type shot blasting machine is to project the shot blasting medium (usually steel shot) at high speed onto the surface of the workpiece through a high-speed rotating shot blasting wheel, so as to achieve the purpose of cleaning the surface, removing rust, scale, sand and other impurities, and at the same time enhancing the strength of the workpiece surface and improving its fatigue resistance. Crawler-type shot blasting machine is widely used in casting, machinery manufacturing, construction, automobile and other industries to clean the surface of various metals, concrete and other materials. Its working principle mainly includes several key steps such as the conveying of workpieces, the effect of shot blasting, and the control of the cleaning process.

1. Conveying and positioning of workpieces
The working process of crawler-type shot blasting machine starts with the conveying and positioning of workpieces. The workpieces are sent into the shot blasting chamber of the shot blasting machine one by one through the crawler conveying system. The crawler system is usually composed of wear-resistant chains or rubber crawlers, which can withstand large loads and friction to ensure the smooth conveying of workpieces. During the conveying process, the crawler not only bears the function of sending the workpiece into the shot blasting room, but also ensures that the workpiece stays evenly in the working room and receives the projectile steel shot at an appropriate angle and position.
The characteristics of the crawler shot blasting machine are its automation and continuity. The conveying speed and shot blasting time of the crawler can be adjusted according to production needs. By controlling the speed of the crawler, the contact time between the workpiece and the shot blasting wheel can be accurately controlled, thereby affecting the cleaning effect of the workpiece and the uniformity of the surface treatment.

2. The role of the shot blasting wheel
In the core working link of the crawler shot blasting machine, the shot blasting wheel is a decisive component. The shot blasting wheel generates a strong centrifugal force through high-speed rotation, and projects steel shot or other media at high speed onto the surface of the workpiece. The speed and angle of the shot blasting wheel can be adjusted to control the speed and projection range of the projectile medium.
Projectile process: The high-speed rotation of the shot blasting wheel causes steel shot or other granular media to be projected onto the surface of the workpiece. Due to the high-speed impact force of the steel shot, these media can effectively remove rust, scale, sand and other impurities on the surface of the workpiece, and at the same time scratch the surface to form a compressive stress layer, thereby enhancing the fatigue resistance of the workpiece and achieving the effect of surface strengthening.
Adjusting the angle and speed: According to different workpieces and processing requirements, the angle and speed of the shot blasting wheel can be adjusted to achieve different shot blasting effects. Through reasonable adjustment, the steel shot can be evenly covered on the surface of the workpiece to ensure the consistency of surface cleaning.

3. Cleaning and surface strengthening of workpieces
When the shot blasting wheel projects the steel shot onto the surface of the workpiece, it will first remove impurities such as scale, rust, and old coating on the surface of the workpiece, making the surface of the workpiece smoother and flatter. At the same time, due to the high-speed impact of the steel shot on the surface of the workpiece, a certain compressive stress layer will be formed on the surface of the workpiece. This compressive stress helps to improve the fatigue strength of the workpiece and extend its service life. It is particularly suitable for parts that are subjected to high pressure, heavy load or high stress.
In addition, during the shot blasting process, the time and intensity of contact between the steel shot and the workpiece surface will also affect the roughness of the surface. Usually, a certain micro texture will be formed on the surface, which plays an important role for some products (such as surface treatment before painting).

4. Recovery and recycling of steel shot
An important feature of the crawler shot blasting machine is the recovery system of the shot blasting medium. The steel shot after shot blasting is recovered by gravity or airflow, and the steel shot is separated from other impurities (such as fragments and dirt of the workpiece) by the sorting system. The separated steel shot will be sent back to the shot blasting wheel to continue to participate in the subsequent surface treatment. This recycling method not only reduces the operating cost, but also improves the energy efficiency and environmental protection of the shot blasting machine.

5. Exhaust and dust removal system
During the shot blasting process, the dust and impurities generated by the collision between the steel shot and the workpiece surface will fly up. In order to ensure the normal operation of the equipment and the air quality of the workshop, the crawler shot blasting machine is equipped with an exhaust and dust removal system. These systems can effectively absorb the dust and impurities generated during the work process, ensure the cleanliness of the workshop environment, and reduce the wear of the equipment by dust.

6. Automated control and operation
Modern crawler shot blasting machines are usually equipped with automated control systems, which can be operated and adjusted through devices such as computers or touch screens. Operators can set different shot blasting parameters (such as shot blasting wheel speed, crawler speed, working time, etc.) to achieve accurate surface treatment. The automated control system can also monitor the operating status of the equipment in real time to ensure that the equipment is in the best working condition.

Summary
The crawler shot blasting machine achieves multiple functions such as cleaning, rust removal, and surface strengthening through multiple links such as crawler conveyor system, high-speed rotation of shot blasting wheel, high-speed projectile of steel shot, and recycling of recycling system. Its working principle is mainly to use high-speed projectile steel shot to impact the surface of the workpiece to achieve the effect of cleaning, removing impurities, and enhancing surface strength. Through reasonable design and automated control, the crawler shot blasting machine can improve production efficiency, reduce costs, and ensure the quality and uniformity of workpiece surface treatment.