How to choose the correct grinding wheel

Abrasives are one of the important parameter properties for measuring the characteristics of resin EN12413 cutting discs. By analyzing the characteristics of various abrasives, we can find the most suitable abrasive for workpiece grinding, and then select the grinding wheel that is most suitable for workpiece grinding. Abrasives are divided into natural abrasives and artificial abrasives. Natural abrasives have a variety of corundum abrasives and diamonds; natural corundum has more impurities, internal distribution is uneven, the price is high, and it is less used to directly make grinding wheels. The abrasives currently used to make grinding wheels are mainly artificial abrasives. There are corundum abrasives, silicon carbide abrasives, and superhard abrasives. Analysis of several commonly used artificial corundum abrasives: The main component of the corundum abrasive is aluminum oxide (AL2O3); it is obtained by high-temperature melting from bauxite. Suitable for grinding materials with high tensile strength. According to the content of aluminum oxide, internal crystal structure and other impurities, corundum is divided into brown corundum, white corundum, chrome corundum, etc.: 1. Brown corundum (A) Also known as alumina (ALO), the color is tan. Brown corundum ceramic wheels are often blue and light blue. Brown corundum has high hardness and toughness and can withstand large grinding pressure. It is suitable for grinding carbon steel, alloy, high-hard bronze and other metals. Brown corundum abrasives are cheap and widely used. 2, white corundum (WA) White corundum containing alumina is extremely high purity, white color, also known as white alumina, white corundum grinding wheel is harder than brown corundum, sharp grain. When grinding, the abrasive grains are not easy to be blunt, and the blunt abrasive grains are also easy to fall off to reveal new abrasive grains inside, which has quite good self-sharpness. The 6 inch es cutting disc has good machinability, and the heat generated during grinding is lower than that of brown corundum. It is mostly used for hardened steel, high speed steel and easily deformable workpieces. 3, chrome corundum (PA) chrome corundum because it contains a small amount of chromium oxide, it is red rose, pink. Its hardness is comparable to that of white corundum, and its toughness is higher than that of white corundum. When grinding high-vanadium and high-speed steel, the grinding wheel is more durable than the white corundum grinding wheel, and the working efficiency is higher. The same type of chrome corundum grinding has higher thickness than white corundum, suitable for forming grinding, instrument parts and each High-gloss surface finish. 4, microcrystalline corundum (MA) color is light brown. The content of aluminum oxide is 94% to 96%, and the 10% fine corundum crystal has high toughness and self-sharpness. Suitable for precision grinding of stainless steel and bearing steel. 5, single crystal corundum (SA) single crystal corundum is a single crystal smelted by a special method. It does not mechanically pulverize like other abrasives, so there is no damage and residual stress inside the abrasive grains, hardness and toughness are higher than white corundum. High durability during grinding. It is suitable for grinding tough stainless steel, high vanadium high speed steel and other difficult materials. It is also used in ultra-precision grinding.

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