Shot blasting is the name of a mechanical surface treatment process. Similar processes include sandblasting and shot peening. Shot blasting is a cold treatment process, divided into shot blasting cleaning and shot blasting strengthening.Shot blasting is to remove the surface oxide scale and other impurities to improve the appearance quality. Shot blasting is to use high-speed moving shots (60-110m/s) to continuously impact the surface of the strengthened workpiece, forcing the target surface and surface layer (0.10-0.85mm) ) get changes during in the cyclic deformation process:

1. The microstructure is modified; 2. The non-uniform plastic deformation of the outer surface layer introduces residual compressive stress, and the inner surface layer produces residual tensile stress; 3. The outer surface roughness changes (Ra Rz). Impact: It can improve the fatigue fracture resistance of materials/parts, prevent fatigue failure, prevent plastic deformation and brittle fracture, and improve fatigue life.

The principle of shot blasting

Shot blasting means that the shot material (steel shot) is projected onto the working surface at a high speed and at a certain angle by a mechanical method, so that the shot particles impact the working surface at a high speed, and the combined effect of the vacuum negative pressure and the rebound force of the matching vacuum cleaner makes the pellets circulate by themselves inside the equipment, and at the same time, through the air cleaning effect of the matching vacuum cleaner, the pellets and the cleaned impurities are separately recovered, and the pellets can continue to be recycled. The machine is equipped with a dust collector to achieve dust-free and pollution-free construction, which not only improves efficiency, but also protects the environment.

When the machine is operating, by selecting the particle size and shape of the pellets, and adjusting and controlling the walking speed of the equipment, the ejection flow of the pellets is controlled to obtain different ejection intensities and different surface treatment effects.

Technical requirements of shot blasting process

The shot blasting process and shot blasting equipment are based on the different surfaces to be treated. Three parameters are used to control the surface condition after treatment: select the size and shape of the shot material; the walking speed of the equipment; and the flow rate of the shot material. The above three parameters cooperate with each other to obtain different treatment effects and ensure the ideal roughness of the surface after shot blasting.