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Reasonable use of the grinding wheel
2012-11-05 by seoer10
Different workpiece material, different processing requirements, should use different wheel. Grinding the same workpiece material, different grades of grinding wheel may be a difference of 2 to 5 times, and therefore the appropriate choice of the grinding wheel. Diamond wheel for grinding hard alloy, optical glass, ceramics, gems and stone high brittle non-metallic materials abrasive. But diamond easy carbonized at 700 ℃ ~ 800 ℃, so it is not suitable for grinding steel material. CBN the hardness slightly inferior to the diamond, but its thermal stability (the ability of a high temperature of 1300 ° C to 1400 ° C), as it does not like diamond will decompose at high temperatures, i.e., oxidation and graphitization, chemically inert with the iron group element, high thermal conductivity (which is the corundum of 46 times), with its production of long wheel life (up to corundum grinding wheel a few times to more than a hundredfold), alternative corundum grinding wheel grinding hardened steel, high speed tool steel, bearing steel , stainless steel, heat resistant steel, and titanium alloys, and high hardness toughness of a metal material, the best abrasive. Superabrasive grinding wheel is a binding agent such as resin, metal, ceramics, electroplating and brazing. Resin bonded grinding wheel is mainly used for measuring tool blade sharpening, grinding holes, cylindrical grinding and flat grinding; metal bondedcutting wheel for plunge grinding, forming optical curve grinder mill, grinding cutting tool, grinding small drill bit helical groove, but also applicable to the electrolytic grinding; high grinding efficiency of the vitrified grindstone, shape retention, durability, ease of trimming, the wheel life long, and has good chemical stability due to ceramic binding agent itself, heat, oil, acid erosion, can be adapted to a variety of grinding fluid grinding low cost, which has become an efficient, high-precision grinding the preferred abrasive; plating grinding wheel is suitable for high-speed grinding and forming grinding, also suitable for hole the efficient grinding (wet milling) and coordinates grinder; brazed grinding wheel suitable for ultra-high-speed grinding. It must be noted that different grades of abrasive, because the manufacturing process is different, and its crystal morphology, particle shape is also different, having different strength, thermal stability and breaking characteristics, depending on the type of binding agent, grinding the workpiece material and the grinding mode, Select a different abrasive. As for efficient, high-precision grinding ceramic bonded grinding wheel, the choice of high intensity and sharp abrasive particle shape. Superhard grinding production surface and metallized coat (metal coatings can play a reinforcing toughening slow thermal shock, and the bridge between the abrasive particles and the binder from the combined role, can improve the grinding wheel performance) and not gold-plated case of two-clothes species selected should be based on the type of binder, the workpiece material, dry grinding and wet grinding conditions. Dry grinding is generally used in copper clothing, such as RVD-Cu CBN-Cu; the wet milling chosen nickel clothing, such as RVD-Ni, CBN-Ni. Present, the plated metal has been the development of nickel, copper, titanium, tungsten alloy, non-metallic, ceramic, etc., by a single coating development to the composite coating, and has been developed to the abrasive plated micropowder plated. Superhard abrasive grinding wheel of concentration can not be chosen too low, the high concentration of high grinding ratio, 200% concentration of the grinding wheel is actually a super abrasive accessories ordinary grinding wheel is generally not recommended Naming. Currently, high-speed efficient grinding using a higher concentration, and the vitrified CBN reliable sealing prevent superabrasive enter, accelerated mechanical wear. Have a grinding fluid filtration and supply system, into the graphite powder, this method is also applicable to the resin, ceramic bonded grinding wheel.
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