By Harold Rothbart
The cam, used to translate rotary movement into linear movement, is an essential component of many periods of machines, resembling printing presses, fabric equipment, gear-cutting machines, and screw machines. Emphasizing computer-aided layout and production innovations, in addition to subtle numerical regulate tools, this instruction manual permits engineers and technicians to make use of innovative layout instruments. it's going to lessen time spent at the drafting board and raise productiveness and laptop accuracy.
* Cam layout, manufacture, and dynamics of cams
* the most recent computer-aided layout and production recommendations
* New cam mechanisms together with robot and prosthetic functions
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Additional info for Cam Design Handbook
26) is the point on the follower located at the knife-edge, roller center, or spherical-faced center. The pitch curve, or pitch proﬁle, is the path of the trace point. 26 shows the pitch curve of a radial cam. In cam layout, this curve is often determined ﬁrst and the cam proﬁle is then established by tangents to the roller or ﬂat-faced follower surfaces. For the elementary knife-edge follower, the pitch curve and cam proﬁle are the same. The prime circle (see Fig. 26) is the smallest circle drawn to the pitch curve from the cam center.
The layout consists of the projections of equal arcs on an ellipse of assumed major to minor axis ratio (see Fig. 13): 1. Plot ordinate and abscissa axes with the total rise of the follower h equal to either the major or the minor axis of the ellipse. 2. Describe two circles whose diameters are equal to major and minor axes. 3. Draw any radius AE cutting circles at E and F. 4. Draw lines through E parallel to one axis and through F parallel to the other. The intersection G of these two lines is a point on the ellipse.
This is especially true of the acceleration data which is the important determining factor of the dynamic loads on cam-follower systems. This chapter presents mathematically established basic curves which are the ﬁrst selection to establish the follower action. They are easy to analyze and manipulate. Cams can be designed for any acceptable curve or shape. Appendix A lists various kinds of geometric curves that have been used in the past. They include the ellipse, parabola, hyperbola, logarithmic spiral, and involute of a circle.