1. Shot blasting is to use a high-speed rotating impeller to throw small steel shot or small iron shot and hit the surface of the part at high speed, thus removing the oxide layer on the surface of the part. Sand blasting is a method of blowing quartz sand out at high speed with compressed air to clean the surface of parts.

2. Generally speaking, shot peening is used for regular shapes, etc. And several shots go up and down together, with high efficiency and little pollution. Sand blasting is used for complex shape, easy to remove rust by hand, low efficiency, bad site environment and uneven rust removal.

3. Generally speaking, shot peening (small steel shot) is mostly used for steel plate pretreatment (rust removal before painting) in shipbuilding industry. Sand blasting (ore is used in ship repair and shipbuilding) is mostly used to shape ships or profiles, and its function is to remove old paint and rust from steel plates and repaint them.

4. Shot blasting is to use the motor to drive the impeller to rotate, and through centrifugal force, the shot (including cast shot, cut shot, stainless steel shot, etc.) will be shot. ) the diameter of 0.2~3.0 is thrown to the surface of the workpiece, which makes the workpiece beautiful, or changes the welding tensile stress of the workpiece into compressive stress, and improves the service life of the workpiece. Sand blasting is an advanced method in steel structure, and the application of high-strength bolts for connection is a relatively advanced method. Because the high-strength connection uses the friction between the joint surfaces to transmit force, the quality of the joint surfaces is very high, so the joint surfaces must be sandblasted.

Extended data

The difference between sandblasting and shot blasting;

1. The difference between shot blasting and shot blasting

Although the injection power and methods of the two processes are different, they both aim at high-speed impact on the workpiece and the effect is basically the same. Comparatively speaking, shot peening is fine and easy to control precision, but its efficiency is not as high as that of shot peening. Shot peening is economical and practical, and it is easy to control efficiency and cost. Shot peening can control the effect of shot peening, but there is a dead angle, which is suitable for batch processing of workpieces with single shape and surface.

The choice of the two processes mainly depends on the shape and processing efficiency of the workpiece.

2. The difference between shot blasting and sand blasting

Shot peening and sand blasting are driven by high-pressure air or compressed air, which is blown out at high speed to impact the surface of the workpiece to achieve cleaning effect, but different media have different effects.

3. The difference between sandblasting and shot blasting

After sandblasting, the dirt on the surface of the workpiece is removed, the surface of the workpiece is slightly damaged, and the surface area is greatly increased, thus increasing the bonding strength between the workpiece and the coating/coating.

The surface of the workpiece after sandblasting is metallic, but it is dark because of its rough surface, light refraction and no metallic luster.

After shot peening, the dirt on the surface of the workpiece is removed, the surface of the workpiece is slightly damaged and the surface area is increased. Because the surface of the workpiece is not damaged during machining, the excess energy generated during machining will lead to the surface strengthening of the workpiece matrix.

References:

Baidu encyclopedia-sandblasting

? Baidu encyclopedia-shot blasting