MEC 411 Lecture Notes - Lecture 2: Joule, Critical Path Method, Angular Velocity
5 Oct 2015
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Document Summary
Cam-follower mechanisms are used extensively in various industries. To control a process with low power transmission capability. Cutaway of an engine with dual cam shafts. Basic components in a cam-follower mechanism a rotating disk or cam (input link) a follower (output link) roller (e. g. , in a form-closed cam-follower) springs (to ensure adequate contact force) Determining the shape of cam satisfying the law of cam design and other restrictions (e. g. , minimizing max vel. , acc. , jerk). Laying a cam by specifying an adequate base circle (carrier) to eliminate cusp and ensure desirable pressure angle for smoother operations. Curved or flat, rolling or sliding type of follower. Force closed (see previous slide, through pre-loaded springs) No need for springs; no resonance issue; push/pull provided by the two surfaces of a slot. Impact due to sudden change in forces and presence of clearance between roller and slot. The follower motion is in the radial direction relative to the camshaft.
