Analysis of influence of quality of steel shot on cleaning effect

　　Steel shot is the main consumables in the workpiece in the process of the shotblast cleaning, the quality of the wear a gradual process of steel shot, steel shot after shot blasting machine speed after hitting the surface of the workpiece, not after a shock, deformation of a steel shot, and fall off a layer of metal, the shape of steel shot similar to football, is a polygon, each direction effect on the impact of the casting is equal, After many times of impact, the steel shot continues to shrink, and when small enough, it will be sucked away by the dust collector, or separated by the shot sand separation device. Shot sand separator is the brain of shot blasting machine, which illustrates the importance of it in the whole set of shot blasting equipment. In the process of shot blasting machine, the performance of shot sand separator will directly affect the cleaning efficiency and cleaning cost. The work of shot sand separation is to knock off the impurities of the casting sand and those who have been ground very small or have broken the steel shot from the normal use of the steel shot separation, to ensure the cleaning efficiency to reduce the wear of the shot blasting machine. Sand is the main reason for equipment wear when the shot blasting machine is working. There are data statistics that the life of wearing parts will be reduced by half every 2% increase of sand.

　　After blast cleaning of casting surface roughness with the strength of steel shot and mass ejection velocity has a close relationship, the greater the particle size of steel shot, the higher the roughness of the workpiece surface, steel shot mass ejection speed faster, the higher the roughness of the workpiece surface, a variety of mixture of the particle size of steel shot, than a single grain size of steel shot have lower surface roughness.