Abstract
Grinding efficiency, wheel wear and grinding ratio are evaluated in plunge grinding under the concept which abrasive grains cut the workpiece, as well as tips on the ground surface scratch the bond of grinding wheel. Grinding ratio is related with Young's modulus, the elastic failure energy and the visco-elastic properties of bond. The estimated values which may present the grindability of wheel are verified in the grinding tests with poreless vitrified bonded diamond wheel in regard to the contents of frit, kinds of grains, grain sizes and concentrations. High grinding efficiencies, much wear of wheel and low grinding ratios result in low contents of frit, brittle grains and large grain sizes. Large elastic failure energies of bond predict little wear of wheel and high values of grinding ratio which are verified in the tests.
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