Grinding platform than scraping platform high accuracy principles, detailed answers to professional questions in Bo

Grinding platform high precision than scraping platform, the platform surface is ground level marks the shovel blade, small flatness error. It works free of abrasive grinding table by a small amount of cutting the workpiece (with the combined effects of physical and chemical), correction of the workpiece surface tiny error. (A) physical function: grinding, pressure can be pre-embedded in the abrasive grinding table (the lap) surface can also be coated with an abrasive surface or in the lap. Because the lap of material softer than the workpiece to be polished, the abrasive grains in a semi-fixed or floating multi-blade base lap surface. When the lap and the workpiece relative to exert pressure for grinding motion, between numerous as grains between scratching, rolling, resulting in a small amount of cutting action, and every grain will not repeat itself in the workpiece surface trajectory. (B) chemistry: When chromium oxide, stearic acid or other abrasive scribe workpiece grinding, metal surface of the workpiece will be a very thin layer of the oxide film formed The oxide film itself can easily be milled off. Rapid formation of an oxide film during the grinding process, and constantly being worn away, thereby speeding up the grinding process. Grinding plate (polishing platen) is an order to ensure accuracy and surface finish of the workpiece and the use of coated or pressed on the polishing plate embedded abrasive particles, fine grinding plate and the workpiece by relative motion under a certain pressure on the working surface Finishing derived a cast iron plate.