Three factors of surface result obtained by commonly used cast steel grits process parameters are as follows: acceleration effect of compressed air on jet flow (adjustment of cast steel grits pressure) P, type of abrasive (s), distance of spray gun (H), angle (θ).
1. Influence of pressure adjustment on surface results
After s, h and θ are set, the higher the p value is, the higher the velocity of the jet flow is, the higher the efficiency of sandblasting is, and the rougher the surface of the workpiece is. On the contrary, the surface is relatively smooth.
2. Influence of distance and angle of spray gun on surface result
After the P and s values are set, this is the key to the manual Cast Steel Grits G80 technology. The distance between the spray gun and the workpiece is generally 50-150 mm. The farther the spray gun is from the workpiece, the lower the efficiency of the jet flow and the smoother the workpiece surface. The smaller the angle between the spray gun and the workpiece, the lower the efficiency of the jet flow and the smoother the workpiece surface.
3. The influence of abrasive type on the surface result abrasive can be divided into two types according to the particle state: spherical abrasive and diamond abrasive. Diamond abrasive is usually used for cast steel grits. Glass beads are spherical abrasives.
After the P, h and θ values are set, the surface result obtained by ball abrasive blasting is relatively smooth, while the surface obtained by diamond abrasive is relatively rough, and the same abrasive is divided into thickness and fineness. In China, the thickness of abrasive is divided according to the number of screens, generally known as the number. The higher the number is, the smaller the particle size is. After the P, h and θ values are set, the higher the number of abrasive blasting of the same abrasive, the higher the obtained The smoother the surface results.
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