Segmental wheel research first began with conventional wheels in the 1970s as part of an effort to evaluate the effect of high speed [Yamamoto 1972, Anon 1979, Abdel-Alim, Hannam, and Hinduja 1980]. However, the labor-intensive manufacturing costs were not competitive for the economic gains in productivity possible at that time. However, the recent development of […]
Рубрика: Handbook of Machining with Grinding Wheels
Single Crystal White Alumina
Grain growth is closely controlled in a sulphide matrix. The alumina is separated out by acid leaching without crushing. The grain shape is nodular, which aids bond retention, while the elimination of crushing reduces mechanical defects from processing. 5.4.6 Postfusion Processing Methods As mentioned above, the type of particle reduction method can greatly affect the […]
CBN
3.4.6 Development of CBN CBN is the final and most recent of the four major abrasive types, and the second hardest superabrasive after diamond. Trade names include Borazon (from GE who first synthesized it commercially), Amborite and Amber Boron Nitride (after De Beers), or in Russian literature as Elbor, Cubonite, or P-BN. Boron nitride at […]
Multiple Pore Size Distributions
Wheel manufacturers such as Universal Grinding Wheel (Saint-Gobain Abrasives) have taken this concept further, and produced wheels with multiple pore former size distributions to create both macroporosity for high permeability and microporosity for controlled fracture of the bond. This type of wheel, with trade names such as Poros 2, has proved very effective for creep-feed […]
Grit and Cluster Tools
Finally, for the roughest dressing of large cylindrical or centerless wheels there are grit tools and cluster impregnated tools (Figure 7.12). Grit tools represent the most cost-effective dressing tool for the commonest applications using straight wheels. Clusters consist of a single layer of five to seven large natural diamonds semiexposed on a round flat surface […]
Handling Diamond Rolls
Diamond rolls are high-precision tools and must be treated as such. The following are recommended procedures for assembling a roll on a spindle shaft: • Standard roll/spindle assembly tolerances. Standard toleranced assemblies refer to rolls with bore tolerances of 2.5 to 7 pm over nominal mounting on shafts with nominal to 2.5 pm undersize, giving […]