
82 Fundamentals of Machining Processes
3.7 During orthogonal turning of a seamless tube having 32 mm outer
diameter and 28 mm inner diameter, the following data were available:
rake angle −20°, cutting speed 20 m/min, feed rate 0.2 mm/rev, length
of continuous chip from one revolution 50 mm, cutting force 400 N,
and feed force 150 N. Calculate the coefcient of friction, shear angle,
specic cutting energy, and cutting power.
3.8 In an orthogonal cutting operation, if
The speed of shear
s
=
The speed of the chip
c
=
F
v
1700 N
F
t
1000 N
Rake angle 0°
Shear angle 30°
Velocity of tool advance 50 m/min
Chip thickness 3 mm
Thickness ...