Both shot blasting and sand blasting can clean and decontaminate the workpiece. The purpose is to prepare for the next process, that is, to ensure the roughness requirements of the next process. In order to ensure the consistency of the surface, shot blasting can strengthen the workpiece, so sand blasting is not obvious. Generally, shot blasting is small steel ball and sand blasting is quartz sand. Number of sub items according to different requirements. The technology of sand blasting and shot blasting is used in precision casting almost every day.

Sand blasting uses irregular sand particles to impact the surface of the workpiece, which plays the role of cleaning and increasing roughness, so that the metal workpiece can obtain better mechanical properties and make the coating more firm; Shot peening relies on the strong impact force of shot particles to make the surface of the workpiece closer, so as to make the workpiece more wear-resistant, ductile and corrosion-resistant.

Method for processing dead angle of workpiece by sand blasting and shot blasting in Dalian

The main method is to conduct secondary supplementary polishing operation after shot blasting. The first is to use the sand blasting machine for manual sand blasting and supplementary cleaning, the second is to use the steel brush for cleaning, and the third is to use the grinder for treatment. Of course, if the treatment requirements for some grooves are not very high, there is no need for secondary cleaning.

The change of sandblasting gas pressure has a great impact on the internal stress of the substrate surface. Sandblasting the surface of thin plate and long parts with high-pressure gas will often cause distortion and deformation of the workpiece, and the surface of soft substrate (such as aluminum, zinc, Babbitt alloy, etc.) will be inlaid with sandblasting abrasive. In addition, with the increase of sandblasting gas pressure, the substrate surface activity increases, the surface roughness increases, and the sandblasting efficiency improves. For steel, stainless steel and alloy steel workpieces, the gas pressure value shall be ≥ 0.5MPa. For soft base workpiece, the gas pressure value shall be ≤ 0.3MPa.

While removing rust, it can also beautify the surface of objects (such as deburring, sundries, etc.). Considering all factors, at present, sand blasting machine is a better rust removal method in industrial production. What is its working principle? In short, sand blasting is a method of using compressed air to spray sand with a certain particle size on the rusted surface of parts through spray gun, so as to achieve the effect of rust removal.