The application of Dalian sand blasting and shot blasting in metal surface is very common. The principle is to impact the accelerated abrasive particles on the metal surface to achieve rust removal, deburring, oxide layer removal or surface pretreatment. It can change the finish and stress state of the metal surface. Some parameters affecting sand blasting technology need to be paid attention to, such as abrasive type, abrasive particle size, spraying distance, spraying angle and speed. In addition to sand blasting, shot blasting is also a good choice.

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 abrasive, such as stainless steel shot, in high-energy shot blasting machine or special strong sand blasting machine. To measure the surface strengthening effect of the machine, the test workpiece can be shot blasted or sandblasted, and then measure whether the deformation meets the requirements.