variants of machining are more or less the same. The
radial rake angle is found to be the most significant
factor influencing the cutting force in all variety of
machining systems. As the forces developed in the
process directly depend upon the undeformed chip
thickness, the prominent influence of radial rake angle
on forces is justified.
Fig. 5 shows a comparison of specific energy with respect
to the parameters considered in the study. In all the cases
under the study the specific energy consumed during
molybdenum disulphide assisted machining is low. The
average percentage reduction in specific energy consumption
when machining with graphite and molybdenum
disulphide as compared with wet machining is 20 and
28% at all considered levels of process parameters. The
remarkable reduction of cutting force and hence that
of specific energy strengthen our proposition that
the lubricating property of molybdenum disulphide is
effective in reducing frictional forces at the tool