Benefits of sand blasting process

Dalian sand blasting and shot blasting can remove all dirt such as rust on the workpiece surface, and establish a very important basic schema (commonly known as rough surface) on the workpiece surface. Moreover, it can achieve different degrees of roughness by exchanging abrasives with different particle sizes, such as flying abrasives, abrasives of abrasives, and greatly improve the binding force between the workpiece and coatings and plating materials. Or make the bonding parts bond more firmly and have better quality.

Benefits of sand blasting process

Sand blasting process can be divided into pneumatic spray gun and impeller shot blasting. The advantage of sand blasting process is that it can remove the peak and remove the burrs after die casting, stamping, flame cutting and forging. It has better effect on thinner workpieces and burrs with pores. It can clean the residual sand particles in the sand casting process, clean the rust stains of cast iron or steel, and clean the deoxidized skin after thermal processes such as heat treatment, burning, hot forging and rolling.

In addition, in the application of coating, it can remove the existing coating or protective layer, cover the defects on the casting, such as cracking or cold lines, and provide a glossy surface. In addition, in terms of surface stress, it can provide consistent roughening surface, oiling and spraying effect. When metal parts with high stress, such as springs and connecting rods, are continuously knocked locally, they will deform and show strengthening phenomenon. This strengthening effect requires the use of circular abrasives, such as bujinxiu steel shot, in high-energy shot blasting machine or special strong sand blasting machine. To measure the surface strengthening effect of the machine, Almen test workpiece can be shot blasted or sand blasted, and then measure whether the deformation meets the requirements.

The medium used for sand blasting is sand particles with edges and corners, such as brown corundum, white corundum, iron sand, etc; The medium used for shot peening is round particles without edges and corners, such as steel shot, iron shot, glass shot and ceramic shot.

Sand blasting uses irregular sand particles to impact the surface of the workpiece, which plays the role of cleaning and increasing roughness, so that the metal workpiece can obtain better mechanical properties and make the coating more firm; Shot peening relies on the strong impact force of shot particles to make the surface of the workpiece closer, so as to make the workpiece more wear-resistant, ductile and corrosion-resistant.

Sand blasting does not require high equipment, and the speed of sand blasting is not fast, but the processing speed of workpiece is faster; Shot peening requires more advanced equipment, so the processing speed is slower and usually more expensive.