The cutting mechanism, changing in process of finishing, is theoretically analyzed by assuming the stick as a tool having a long cutting edge, and consequently the cutting depth of a stick
d is derived.
dis composed of the cutting condition term and the measured term of changing speed of workpiece radius. This value is influenced by the cutting characteristics, that is, glazing, crushing or breaking of cutting edges, and decrease in ascending order. Moreover, the evaluating value
di is offered to express the severity of cutting condition, in which the infeed rate is substituted for the measured term of
d. When the specific cutting force
ks derived from
d is applied to experimental results, it is revealed that
ks and its changing type depend strongly on the three cutting characteristics as previously stated.
ksin constant pressure honing is lower than that in constant infeed one, and this is resulting from the difference of applying method of infeed. Comparing the value of
ks with those in other operations, in breaking condition of cutting edges, it is not so different from that in abrasive belt grinding, but in glazing condition, it is larger than that in wheel grinding.
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