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RESEARCH PAPERS

The Design of Cam Mechanisms With Translating Flat-Face Followers Under Curvature Constraints

[+] Author and Article Information
J. Angeles, S. K. Saha

Department of Mechanical Engineering and McGill Research Centre for Intelligent Machines, McGill University, 817 Sherbrooke Street W., Montreal, Canada, H3A 2K6

C. S. López-Cajún

Instituto Mexicano del Transporte, Queretaro, Mexico

J. Mech. Des 116(1), 306-310 (Mar 01, 1994) (5 pages) doi:10.1115/1.2919363 History: Received June 01, 1992; Online June 02, 2008

Abstract

The optimization of cam mechanisms with translating flat-face followers, upon consideration of curvature constraints, is discussed here. When minimizing the size of the cam disk, cam profiles with cusps, i.e., profiles with curvature discontinuities, can appear. On the other hand, cusps are undesirable because they give rise to inadmissibly large contact stresses and hence, should be prevented from occurring. Conditions under which these discontinuities appear, although available in the literature, are not readily applicable to a specific problem. However, if the synthesis of the follower-displacement program is based on spline functions, then readily applicable design formulas, leading to unconstrained optimum designs, are derived. In the presence of curvature constraints, design charts are derived that produce the cusp-free, minimum-size profile for a given displacement program. The same problem for oscillating flat-face followers is addressed in an accompanying paper.

Copyright © 1994 by The American Society of Mechanical Engineers
Topics: Design
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