ESDU 92005:2011

$89.05

Minimum Size of Disc Cams with Radial Translating Roller Followers

Published By	Publication Date	Number of Pages
ESDU	2011-09	47

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Category: ESDU

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Description

ESDU 92005 gives a direct method for finding the minimum
allowable prime circle radius based on the criteria that the
maximum pressure angle does not exceed a specified value and that
profile undercutting is avoided.

ESDU 82023 provides an alternative approach that handles offset
followers as well, but is a geometric iterative procedure. Two
methods are given here: one finds the minimum radius and the
corresponding maximum diameter of the roller follower while the
other finds the minimum radius when the size of the follower is
known. The methods apply to DRD or DRRD follower motion defined by
a single law. A hand calculation may be used based on graphs
provided, or a computer program (ESDUpac A9205). Both methods apply
to six cam laws (simple harmonic, cycloidal, modified trapezoidal
acceleration, modified sine acceleration, and 3-4-5 or 4-5-6-7
polynomial).

Notes on the derivation of the method are included, together
with step-by-step design procedures and guidance on the use of the
program with a detailed explanation of the input and the output.
Worked examples illustrate the practical application of the
procedures during the design of such a mechanism.

Additional information