Abstract
In the previous research, the ultra–smoothness grinding method in which the surface roughness is near the ultra–smoothness surface formed by polishing, is developed and ascertained useful by applying to the horizontal grinding method. Then to improve the removal rate, the vertical ultra–smoothness grinding machine is developed. Using the vertical machine, in the research, the influence of the parallel step feed on the ultra–smoothness grinding of die steel is examined. The surface roughness increases with the increase of the parallel step feed. The best surface roughness obtained in the experiment is about 50nm(Rz) or 5nm(Ra) at the step feed of 20mm.
