
301Abrasive Finishing Processes
removal by sticks, i.e., the ratio of the rate of material removal by supern-
ishing to tool (stick) wear, attains maximum value at a certain level of unit
pressure. Accordingly, an optimum of pressure is satised within the limits
P
1
–P
2
shown in Figure 9.28.
Speed of oscillation: Increasing the speed of oscillation v
o
causes pro-
portional increase in the rate of material removal by supernishing. The
surface quality improves if the increment of v
o
results from increasing
the frequency f
r
and deteriorates if the increase is caused by the stroke
length. For higher surface quality, the workpiece speed V
p
should be ...