The double-dwell cam of Problem 10.5 is mated with a flat-faced follower, as shown in Figure 10.89. The spring has a stiffness of 1000N/m and is compressed 10mm when it is in contact with the base radius. The follower has a mass of 20g. Find the angular velocity of the cam where it begins to lose contact with the follower and plot the contact force at this speed.
Problem 10.5
Design a double-dwell cam with the following properties
• Dwell at 0mm for 90°
• Rise to 20mm over 90° and dwell for 90°
• Fall back to 0mm over 90°
The base radius is 100mm and the rise function is a 3-4-5 polynomial. Plot the radius of curvature for the cam profile. What is the minimum radius of curvature?
Figure 10.89
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