Abstract
In this paper, a new grinding technique, the ultra-low infeed grinding, in which infeed rate of wheel head is controlled at the beginning of spark-out state, is proposed in order to improve significantly the surface roughness of workpiece. Main conclusions obtained are as follows (1) The ultra-low infeed grinding can be superior to the thermal deformation rate control grinding. (2) In the ultra-low infeed grinding under this experimental conditions, the surface roughness of workpiece can be improved by 35 % at the point of 5 s spark-out state and the spark-out grinding time can be reduced by 72% comparing with the conventional grinding. (3) It is experimentally made clear that the optimum of ultra-low infeed rate and of infeed time exist from a viewpoint of the surface roughness improvement process.
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