A variety of grinding wheel types, and a variety of shapes and sizes, according to the grinding wheel abrasive, binder materials and manufacturing process of different, each kind of grinding wheel has a certain scope of application. If you choose improper will directly affect the processing accuracy, surface roughness and production efficiency. Therefore, grinding, must be selected according to the specific circumstances of the appropriate wheel. So how should the correct choice of grinding wheel? Grinding for the grinding wheel commonly used to summarize, Grinding Wheel so that everyone clearly selected wheel selection.
Grinding wheel selection
(1) The choice of abrasive Abrasive selection depends mainly on the workpiece material and heat treatment methods.
A. Grinding tensile strength of high material, Grinding Wheel the choice of toughness of the abrasive.
B. Low hardness, elongation of large materials, the use of more brittle abrasive.
C. High hardness of the material, the choice of higher hardness of the abrasive.
D. Selection of abrasives that are less susceptible to chemical reactions.
The most commonly used abrasives are corundum (A) and white corundum (WA), followed by black silicon carbide (C) and green silicon carbide (GC), the rest are commonly used chrome corundum (PA), monocrystalline corundum (SA) , Microcrystalline corundum (MA), zirconia corundum (ZA).
Brown corundum wheel: high hardness of corundum, toughness, suitable for grinding high tensile strength of the metal, such as carbon steel, alloy steel, malleable cast iron, hard bronze, etc., Grinding Wheel this abrasive grinding performance, wide adaptability, Commonly used in the removal of the larger margin of coarse grinding, cheap, can be widely used.
White corundum wheel: white corundum hardness slightly higher than the corundum, toughness is lower than the corundum, grinding, abrasive grain easily broken, therefore, grinding heat is small, suitable for making refined hardened steel, high carbon steel, High-speed steel and grinding thin-walled parts with the grinding wheel, the cost is higher than the corundum.
Black silicon carbide wheels: black silicon carbide brittle and sharp, Grinding Wheel hardness higher than white corundum, suitable for grinding mechanical strength of low materials, such as cast iron, brass, aluminum and refractory materials.
Green silicon carbide wheel: green silicon carbide hardness brittle black silicon carbide high, abrasive abrasive, good thermal conductivity, suitable for grinding carbide, optical glass, ceramics and other hard and brittle materials.
Chrome corundum wheel: suitable for grinding tools, measuring tools, instruments, Grinding Wheel threads and other surface processing quality requirements of the workpiece.
Single crystal corundum wheel: suitable for grinding stainless steel, high vanadium high-speed steel and other toughness, high hardness of the material and easy deformation of the workpiece burns. The following are the same as the "
Microcrystalline corundum wheel: suitable for grinding stainless steel, Grinding Wheel bearing steel and special ductile iron, etc., for forming grinding, cutting into the grinding, mirror grinding.
Zirconia corundum wheel: suitable for grinding Austrian body stainless steel, titanium alloy, heat-resistant alloy, especially for heavy-duty grinding.
(2) The choice of particle size depends mainly on the surface roughness and grinding efficiency of the workpiece being ground.
Particle size refers to the particle size of the abrasive, and its size is expressed in particle size. Grinding with coarse-grained grinding wheel, the production efficiency is high, but the surface of the workpiece is rough; with fine-grained grinding wheel grinding, grinding the workpiece surface roughness is better, and the productivity is low. In order to meet the requirements of roughness, Grinding Wheel should try to use coarse-grained grinding wheel, in order to ensure a high grinding efficiency. General coarse grinding when the use of coarse-grained grinding wheel, fine grinding when the use of fine-grained wheel.
When the wheel and the workpiece contact area is large, to use some coarse grinding wheel. For example, grinding the same plane, grinding with the grinding wheel of the grinding wheel than the peripheral grinding of the selected particle size is thicker.