‌The following factors need to be considered to determine the amount of steel grit to be added to the shot blasting machine each time‌:

‌Shot blasting effect‌: Observe the surface cleaning effect of the workpiece after shot blasting. If the cleaning effect is not good, it may be because the amount of steel grit is insufficient, resulting in insufficient impact force. At this time, the steel grit should be increased appropriately; on the contrary, if the cleaning effect is too strong and causes damage to the surface of the workpiece, it may be that there is too much steel grit and it needs to be reduced appropriately‌.

‌Equipment status‌: Modern shot blasting machines are usually equipped with automatic shot adding systems and steel shot flow monitoring devices, through which the consumption and replenishment of steel shots can be monitored in real time. Keep the flow of steel shots within a stable range to ensure the continuity and effect of the shot blasting process‌.

‌Equipment manual and empirical formula‌: Different models of shot blasting machines have their specific steel grit capacity and recommended sand addition amount. When operating, refer to the relevant instructions in the equipment manual and combine some empirical formulas to estimate the required amount of steel grit. The empirical formula can be calculated based on factors such as the size, shape and material of the workpiece‌.

‌Workpiece material and requirements‌: Workpieces of different materials have different impact absorption capacity for steel grit, so the amount of steel grit added needs to be adjusted according to the material of the workpiece. In addition, the amount of steel grit added is determined according to the surface cleaning requirements of the workpiece (such as roughness, cleanliness, etc.). Generally speaking, more steel grit may be required for higher cleaning effects.

‌Gradually increase the amount of steel grit‌: When adding for the first time, the principle of adding a small amount first and gradually increasing should be followed. Do not add too much at one time to avoid excessive impact on the shot blasting machine. During the shot blasting process, closely monitor the shot blasting effect and make adjustments according to actual conditions‌.