Page 99 - Cam Design Handbook

THB3 8/15/03 12:58 PM Page 87

MODIFIED CAM CURVES 87

The velocity
.
.
0493 È 0262p ˘
.
y ¢ = 1 - cos = 0437 in
0698 Í Î 0698 ˙ ˚
.
.
y ˙ = wy ¢ = 75.398 (0.437 ) = 32 93. in sec
The acceleration
0493p Ê 0262p ˆ
.
.
y ¢¢ = sin = 2 938 in rad 2
.
.
.
(0698 ) 2 Ë 0698 ¯
2
¢¢ (75.398
2
y ˙ = w y = ) (2.938 ) = 6700 in sec 2
REFERENCES
Chen, F.Y., Mechanics and Design of Cam Mechanisms, Pergamon Press, New York, 1982.
Erdman, A.G., and Sandor, G.N., Mechanism Design, Vol. 1, third edition, Prentice Hall, Upper Saddle
River, N.J., 1997.
Mabie, H.H., and Ocvirk, F.W., Mechanisms and Dynamics of Machinery, John Wiley & Sons, New
York, 1979.
Neklutin, C.N., Mechanisms and Cams for Automatic Machines, American Elsevier, New York, 1969.
Ragsdell, K.M., and Gilkey, H.E., “Optimal Cam Design Using the Skewed Modified Trapezoidal
Profile,” Proceedings of the Applied Mechanism Conference, Paper 28, Oklahoma State Univer-
sity, Stillwater, 1969.
Schmidt, E., “Continuous Cam Curves,” Machine Design 32 (1): 127–132, 1960.
Wildt, P., “Zwanglaufige Triebkurvenherstellung,” Dusseldorf, VDJ-Trungungsheft, 1: 11–20, 1953.