Abrasive wheel is a grinding tool indispensable to select the appropriate wheel or not, influence the quality of grinding , the grinding costs important condition . Many types of wheel , and a variety of shapes and sizes due to the different abrasive grinding wheel , grinding wheel binder material and the manufacturing process , the wheel having non woven flap wheel a variety of different performance. Each wheel according to its own characteristics, has a certain scope. Therefore, grinding, must be based on the specific circumstances ( such as the material properties of the workpiece grinding , heat treatment method , the workpiece shape, size and processing forms and technical requirements , etc. ) , choose the appropriate wheel. Otherwise they will be directly affected by improper wheel to select the machining accuracy , surface roughness and production efficiency. Wheel to select the basic principles are listed below for reference.
Black silicon carbide wheel: black silicon carbide is brittle and sharp , high hardness than corundum white , suitable for grinding lower mechanical strength of the material , such as cast iron , brass, aluminum and refractory .
Green silicon carbide wheel: darker green silicon carbide SiC high hardness brittle , abrasive sharp, good thermal conductivity, suitable for grinding carbide , optical glass , ceramics and other brittle materials.
Chrome corundum grinding wheel : high ceramic flap disc quality requirements for surface finish of the workpiece grinding tools, measuring tools , instruments, and other threads .
Monocrystalline corundum wheel : suitable toughness , high hardness material grinding stainless steel, high speed steel and vanadium burns easily deformed workpiece .
Microcrystalline corundum wheel : suitable for grinding stainless steel, bearing steel and specialty ductile iron , etc., for molding grinding, cutting mill , mirror grinding.
Corundum wheel: Olympic Di suitable for grinding stainless steel, titanium alloys , heat-resistant alloys, especially suitable for heavy duty grinding.
2 particle size depends on the choice of the surface roughness of the workpiece to be ground and the grinding efficiency.
Granularity refers to the size of the Mounted flap wheel abrasive particles , whose size is represented by particle number with a time of coarse-grained grinding wheel , high production efficiency, but the surface is rough grind ; using fine-grained grinding wheel , the workpiece surface grind better roughness and lower productivity. Meet the requirements under the premise of roughness , should try to use coarse-grained grinding wheel to ensure a high grinding efficiency . Generally coarse grained wheel selection , the selection of fine-grained grinding wheel when grinding . When a larger contact area when the grinding wheel and the workpiece , to use some of the rough wheel size . For example , the same surface grinding , face grinding wheel with a wheel of granularity than the surrounding ground to choose thicker .
3 depends on the hardness of workpiece material selection is grinding , grinding efficiency and surface quality . Hardness is the degree of difficulty falling abrasive wheel under external force , in order to adapt to different requirements for grinding the workpiece material into different wheel hardness grades manufacturing . Wheel election was tough, blunt abrasive easy to fall off , easy to plug the wheel , grinding heat increases, the workpiece easy to burn, low grinding efficiency, impact surface quality ; wheel selected too soft , abrasive when it was still a sharp fall increased wheel loss is easy to lose the correct geometry , the impact accuracy of the workpiece . Therefore, the hardness of the wheel to select the appropriate , should be based on the size of the contact area between the grinding wheel and the workpiece , the workpiece shape , way grinding , cooling, binders and other types of wheels factors considered.
First of all, you need to determine the material that needs cutting. Once you know that, you can determine the right type of tool for the job. You can choose aluminum oxide abrasive wheels for grinding steels and ferrous metals. Non metallic materials and non ferrous metals along with cast iron are best served by a grinding wheels made of silicon carbide abrasives.
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