Table of Contents
Advertisement
2. Moment of inertia of the chuck
2
3. Moment of inertia of workpiece
4. Total weight
The total weight (W) is calculated as follows: W = Ws + Wc + Ww = 0.84 (kgf)
5. Total moment of inertia
The total moment of inertia (J) is then obtained as follows: J = Js + Jc + Jw = 0.062 (kgfcmsec
2-16
Moment of inertia of the chuck
4cm
6cm
Moment of inertia of workpiece
4cm
When the chuck form resembles
R-axis
that shown in figure, the weight
of the chuck (Wc) is
Wc
= 0.0078 × 2 × 4 × 6
= 0.37 (kgf)
The moment of inertia of the
chuck (Jc) is then calculated
from Eq. (7).
0.37 × (2
+4
2
Jc =
12 × 980
0.37 × 10
+
980
= 0.038 (kgfcmsec
When the workpiece form
R-axis
resembles that shown in figure, the weight of the
workpiece (Ww) is
ρπD
2
h
Ww =
=
4
= 0.098 (kgf)
The moment of inertia of the
workpiece (Jw) is then calculated
from Eq. (5).
0.097 × 2
2
Jw =
+
8 × 980
= 0.010 (kgfcmsec
2
)
2
2
)
2
23212-F0-00
× 4
0.0078π × 2
2
4
0.097 × 10
2
980
)
23213-F0-00
2
)
Advertisement
Table of Contents
