Abstract
A testing apparatus was devised to evaluate the grinding performance of tools; the tool engagement was set, and the depth of cuts were measured throughout successive strokes of the work at constant speeds. Using a 13% Cr-Ni alloy, the performance of a CBN-electrodeposited wheel was compared with that of two vitrified-bond alumina wheels on the market.
Because of the run-out effect of the wheels, there were some differences in grinding action between rotational speed of 22, 000 rpm and speeds below 18, 000 rpm. At the high speed the ground surface was very wavy, and the final depth of cut exceeded the engagement. At lower speeds the surface was relatively even, but the engagement tended not to be entirely removed. Also at high speeds of work, the grinding had to be repeated many times for a certain depth of cut, and a lot remained uncut.
In consideration of run-out, the CBN-electrodeposited wheel was tested at only 12, 000 rpm. Nevertheless, it exhibited high performance even at the high speed of work.
