Influence of Internal Grinding Wheel using Aluminium Oxide with Boron Nitride and its Relation to Dressing and Surface Roughness

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Shivashankara Shivashankara
Rudra Naik
M.G. Patil

Abstract

Performance of grinding wheel depends on different factors from dressing operations to wheel topography. This will directly show effect on grinding force, surface quality and wheel durability. During grinding, an improved wheel should reduce the number of passes as well as the dressing time (wheel gets loading) to increase the production rate and minimize the total cycle time to complete the parts. This paper presents several process parameters to obtain the improved surface roughness and round tolerance such as coarse dress depth of cut 30 microns for the first pass, fine dressing depth of cut 20 microns for the second pass and a dressing speed and feed rate of 0.5m/min respectively. The experiments with the optimal dressing parameters have been considered to check the wheel durability and its performance. The parameters investigated were wheel life, surface roughness and round tolerance from the experiments with different cutting variables like depth of cut, speed, feed rate and percentage of wheel depletion. For this purpose, a single point diamond dresser with four different test samples using Aluminium Oxide (Al2O3) with Boron Nitride (BN) for internal grinding wheels were chosen for the experiment.

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