can be calculated by the finite element method of stress magnitude different speeds to simulate the failure process and improve the design.
2013年8月1日星期四
Introduction to the various types of grinding wheel
1, vitrified grinding wheels: the production of a vitrified grinding wheel, has good chemical stability, the processing can be used as cutting fluid, but also for dry
grinding. Ceramic grinding wheel widely used for flat, internal and external grinding, and grinding tools for forming, thread, gear, crankshaft
Such as grinding. Ceramic grinding wheel speed can also be made to be used for high speed grinding, working speed up to 125 m / s, strong creep feed grinding ceramic
grinding wheels, a cutting depth of up to 20 to 30 mm. Ceramic grinding brittle, not suitable for the harsh impact or heavy load conditions
Work.
2, resin grinding wheel: made with resin bonded abrasive wheels . Curing the resin temperature is low, shrinkage is small, can be made into a variety of complex
grinding wheel shapes, and embedded in a metal ring and a reinforcing material such as glass, wire cloth, the grinding wheel, high strength, impact force in the heavy
or large
Work under harsh conditions. Such as high-speed heavy-duty wheel speed of 80 m / s, load generally up to 9800 cows. Resin has some flexibility, with its grinding
wheels made of mirror workpiece can get small surface roughness. Plasticity of the resin before curing, but also
Made of 0.5 mm or thinner cut or slotted wheel. Resin wheel chemical stability, suitable for use with alkaline cutting fluid.
3, rubber wheel: rubber binder production of the wheel. It has good flexibility, primarily for surface finish (such as soft polishing wheel), the bearing raceways and
tapered grinding, centerless grinding is used as the guide wheels, the wheel can also be made thin, for cutting or grooving.
There are also magnesite wheel and shellac wheel. Magnesite wheel made of magnesium oxide (calcined magnesite), magnesium chloride solution and abrasive mixing,
pressing or casting molding, hardening formed at about 40 ℃, mainly for tool sharpening, safety and other coarse blade. Shellac with worm wheel
Adhesive and abrasive blend, small surface roughness for the occasion requires. Both wheel is not wide applicability, and most available resin wheel instead.
4, a grinding wheel made of diamond or cubic boron nitride abrasive wheel, generally the matrix, and the transition layer 3 super abrasive parts. Grinding wheel
grinding wheels with common characteristics substantially the same, but it is not marked "organization" and to the "concentration" means
How much abrasive content. This cross-sectional shape of the wheel diagram. Grinding wheel with a binder metal, resin, ceramic, and metal plating.
5, diamond grinding wheel: diamond has the highest hardness, thus diamond grinding wheel, high efficiency, abrasion, long service life, to keep sharp surface to be
machined without causing cracks and burns, high precision, smooth surface, suitable for grinding Carbide cutting
, Ceramics, optical glass, agate, precious stones, semiconductor materials, such as stone and refractory high hardness, brittleness of the metal and non-metallic
materials.
6, CBN grinding wheel: CBN diamond hardness slightly lower than the iron group metals chemically inert good, and thus suitable for grinding high hardness, high
toughness steel materials, such as tool and die steel, alloy steel, heat-resistant steel, stainless steel, ductile iron and some nickel-and cobalt
Based alloy.
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