Synthesis of displacement functions by Bézier curves in constant-breadth cams with parallel flat-faced double translating and oscillating followers
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Document typeArticle
Date issued2013-04-01
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Abstract
The constant-breadth cam mechanisms, which drive a parallel flat-faced double follower, are
desmodromic, and guarantee global bilaterality. In the said mechanisms, the law of
displacement of the follower can only be freely designed for an interval of the rotation angle
of the cam – the designed segment – close or equal to 180°, and the remaining interval – the
calculated segment – is obtained through calculation from the first. Guaranteeing the continuity
between segments is not a trivial task. This work shows a design procedure which guarantees
automatically the global continuity of the law of displacement. This procedure provides the
expressions of calculation for both parallel flat-faced double translating follower and parallel
flat-faced double oscillating follower. Non-parametric Bézier curves are used for the definition
of the displacement functions. For both types of followers, two numerical examples of the design
of the displacement functions are given. Furthermore, the corresponding cam profiles are
provided.
CitationCardona, S. [et al.]. Synthesis of displacement functions by Bézier curves in constant-breadth cams with parallel flat-faced double translating and oscillating followers. "Mechanism and machine theory", 01 Abril 2013, vol. 62, núm. 1, p. 51-62.
ISSN0094-114X
Publisher versionhttp://dx.doi.org/10.1016/j.mechmachtheory.2012.11.004
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