
246 Fundamentals of Machining Processes
ll dd t
ao gg
mm==+−∆ ()
l
a
is small in grinding and allows for the table reversal at the end of each
stroke. The grinding-wheel radius is, therefore, assumed as the approach
allowance. Then
ll
ao
g
==
For a workpiece width b
w
and wheel cross-feed S
t
, the number of grinding
passes i is
i
b
=
w
Vertical axis surface grinding: In such a case, the machining time t
m
can be
calculated as shown in Figure 8.19 using the following:
ti
Kd l
v
b
d
m
gg
w
w
g
=
+
where
b
w
is the workpiece width in mm
i is the number of passes
d
g
is the grinding-wheel diameter
K
g
= 1.1–1.2
d
g
, v
g
b
w
, v
w
d
g
, v
g
FIGURE 8.19
Grinding time for vert ...