How To Select And Optimize Abrasive Parameters

Abrasives are divided into metal abrasives and non-metal abrasives. Metal abrasives include steel pellets, steel sand, iron pellets, iron sand, stainless steel pellets, stainless steel sand/steel wire cutting pellets and stainless steel wire cutting pellets, etc., compared with non-metallic abrasives, it has great advantages, and is widely used in cleaning, such as the workload of 1 ton iron pellets or iron sand is equivalent to 50 tons of sand, the workload of 1 ton steel pellets or steel sand is equivalent to 200t sand, and the economic benefits are quite obvious. The density of metal abrasives is 1.5-2.5 times that of non-metallic abrasives, and the cleaning efficiency and effect of metal abrasives are better than non-metallic abrasives. There is a large range of choice for the hardness, particle size and particle shape of metal abrasives.Metal abrasive dust content and crushing rate are lower than non-metal abrasive, the use of metal abrasive cleaning site dust pollution is small, high visibility, cleaning quality is easy to be guaranteed, work efficiency is also high. Metal abrasive particles will not be embedded in the matrix of the workpiece. Some non-metallic abrasives, such as copper slag abrasives, are hard and brittle, and some of the abrasive particles will be embedded in the metal matrix when they hit the surface, and the abrasives embedded in the metal matrix are not easy to clean up.From the cleaning efficiency and roughness consideration, usually the different particle size of the metal abrasives mixed after use. For example, 1.2mm steel balls (sand) and 0.6mm steel balls (sand) are used in a mixed platform, which can meet the requirements of surface roughness, but also make the cleaning effect and cleanliness reach the ideal degree.Metal abrasives are recycled and reused under controlled environmental conditions, and the number of times of reuse can be as high as 200. After a period of use, the particle size distribution of the original abrasive will change because of wear and breakage, the large particle of abrasive less and less, the corners of the steel sand gradually become rounded, and the surface roughness will be reduced.In the general field of blasting (spraying) shot cleaning, the proportion of too, medium and small abrasive particles should be appropriate, and each has its own role: large abrasive particles are used to ensure surface roughness, and another role of large abrasive particles is to loosen the material firmly attached to the surface to be cleaned (such as dense oxide); The coverage rate of small particle abrasives is high, the cleaning efficiency is high, and it can enter the slit or groove surface that is difficult to reach by large particles to improve the cleaning quality. Make the efficiency of shot peening cleaning, cleaning quality and surface roughness to achieve a good unity