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On the fused aluminium oxide premise of meeting the requirements of roughness, coarse-grained grinding wheel should be selected as much as possible to ensure high grinding efficiency. Generally, coarse grinding wheel is used for rough grinding and fine grinding wheel is used for fine grinding. When the contact area between grinding wheel and aluminium oxide 36 grit workpiece is large, the grinding wheel with coarser particle size should be selected.

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For example, when grinding the same plane, the white alumina grain size of the grinding wheel is coarser than that of the grinding wheel. Hardness refers to the degree of difficulty for grinding wheel to fall off under the action of external force. In order to meet the requirements of grinding of different workpiece materials, the blunt abrasive grains are not easy to fall off, the pink alumina grinding wheel is divided into different hardness grades when it is manufactured.(cheap brown fused aluminum oxide suppliers usa)

When the brown fused alumina grinding wheel is selected too hard, the grinding wheel is easy to block, the grinding heat is increased, the workpiece is easy to burn, the grinding efficiency is low, and the surface quality of the workpiece is affected; when the grinding wheel is selected too soft, the black silicon carbide factory abrasive grains fall off when it is still sharp, which increases the wear of the grinding wheel, and it is easy to lose the correct geometry, and affects the accuracy of the workpiece.

(cheap brown fused aluminum oxide suppliers usa)Therefore, the selection of the hardness of the grinding wheel should be appropriate, and the factors such as the black corundum size of the contact area between the grinding wheel and the workpiece, the shape of the workpiece, Resin bond is a kind of organic bond. the way of grinding, the way of cooling, and the type of bond of the grinding wheel should be considered comprehensively. The most commonly used black fused alumina wheel binders are ceramic bond (V) and resin bond (b).

The following selection principles of brown aluminum oxide grinding wheel hardness are for reference: hard grinding wheel shall be selected when grinding soft materials, soft grinding wheel shall be selected when grinding hard materials; soft hardness shall be selected when grinding soft and tough non-ferrous metals; soft grinding wheel shall be selected when chrome corundum grinding materials with poor thermal conductivity; However, the ceramic bonded wheel is brittle and can not be subjected to severe vibration.

(cheap brown fused aluminum oxide suppliers usa)The hardness of the grinding wheel should be softer than that of the circular grinding; under the same pink corundum grinding conditions, the hardness of the resin bonded grinding wheel is 1-2 grade higher than that of the ceramic bonded grinding wheel; when the rotation speed of the grinding wheel is high, the hardness of the pink fused alumina grinding wheel can be 1-2 grade softer; when the cooling liquid grinding wheel is 1-2 grade higher than that of the dry grinding wheel.

Ceramic bond is a kind of inorganic bond, brown aluminium oxide which has stable chemical properties, good heat resistance, corrosion resistance and large porosity. The grinding wheel made of this bond has high grinding efficiency and small abrasion, can better maintain the geometry of the wheel, and has the widest application range. The black aluminum oxide 70 grit abrasive media grinding wheel is suitable for grinding ordinary carbon steel, alloy steel, stainless steel, cast iron, hard alloy, non-ferrous metals, etc.

(cheap brown fused aluminum oxide suppliers usa)Generally, it can only be used at a speed less than 35m / s. The black aluminium oxide grinding wheel made of this bond has high strength, certain elasticity, low heat resistance, good self sharpening, simple manufacture and short process cycle. It can produce grinding wheel with working speed higher than 50m / s and very thin grinding wheel. It is widely used in rough grinding, rough grinding, cutting and free grinding, such as black aluminum oxide blast media grinding ingots, casting burring and so on.