Page 176 - Cam Design Handbook

THB6 8/15/03 2:40 PM Page 164

164 CAM DESIGN HANDBOOK

FIGURE 6.4 Radial cam translating roller-
follower force distribution.

==
0
-
SMFAsina + NB - m N W + m N W (6.2)
p
2
1
SMFA B)sina + N B - m N W + m N W. (6.3)
- (
==
+
0
q 2 1 2
Simplifying Eq. (6.2) and Eq. (6.3) and assuming mN 1W and mN 2W equal zero since they
are negligible yields
A
N = Fsina (6.4)
1
B
+
AB
a
N = Fsin . (6.5)
1
B
Substituting Eq. (6.4) in Eq. (6.1) and eliminating N 1
A
m
0 =-L + Fcosa - F sina - N (6.6)
m
0 2
B
Substituting gives the external load
AB
È Ê 2 + ˆ ˘
L = F cosa - m sina
0 Í Î Ë B ¯ ˙ ˚