Aluminum-magnesium alloy frame is an important part of electronic digital products. Due to its light and soft material, there are many holes, gaps, corners and other complex and special-shaped parts on the surface, and the dimensional accuracy is high. Therefore, the cutting force for grinding burrs, removing flash and oxide scale should not be too large, and the complex parts should be fully polished. Therefore, the polishing machine adopts a groove-type vibration grinding and polishing machine. The small-sized tetrahedral resin abrasive is mixed with large-sized conical resin abrasive for rough grinding. The sharp angle of the rough grinding stone can penetrate into the groove and corner to remove burrs and oxide layers.

Fine grinding uses precision grinding materials without cutting force, spherical high-aluminum porcelain abrasives, which have a large specific gravity and have a polishing and brightening effect, which can further reduce the surface roughness.

In order to improve the anti-rust performance of the product after water, after fine grinding, a vibration (vibration) dryer is used to absorb surface moisture with corn cob abrasives, and the inner and outer surfaces are dried for drying.