Generation of functional tolerancing based on positioning features

2006 ◽  
Vol 38 (8) ◽  
pp. 902-919 ◽  
Author(s):  
Bernard Anselmetti
Procedia CIRP ◽  
2020 ◽  
Vol 92 ◽  
pp. 230-235 ◽  
Author(s):  
Johan Berglund ◽  
Rikard Söderberg ◽  
Kristina Wärmefjord ◽  
Richard Leach ◽  
Edward Morse

Author(s):  
Laurent Pierre ◽  
Bernard Anselmetti

Functional tolerancing must ensure the assembly and the functioning of a mechanism. This paper compares two methods of tolerance analysis of a mechanical system: the method of “analysis lines” and the method of “polytopes.” The first method needs a discretization of the ending functional surface according to various analysis lines placed on the outer-bound of the face and oriented along the normal of the surface. The second method uses polytopes. The polytopes are defined from the acceptable limits of the geometric deviations of parts and possible displacements between two parts. Minkowski sums and intersections polytopes are then carried out to take into account all geometric variations of a mechanism.


Author(s):  
R. S. Srinivasan ◽  
Kristin L. Wood ◽  
Daniel McAdams

Abstract The problem addressed in this paper is the development of a physico-mathematical basis for mechanical tolerances. The lack of such a basis has fostered a decoupling of design (function) and manufacturing. The groundwork for a tolerancing methodology is laid by a model of profile errors, whose components are justified by physical reasoning and estimated using mathematical tools. The methodology is then presented as an evolutionary procedure. This procedure harnesses the various tools to analyze profiles in terms of a minimum set of profile parameters and to re-generate them from the parameters. This equips the designer with a rational means for estimating performance prior to manufacturing, hence integrating design and manufacturing. The utility of the functional tolerancing methodology is demonstrated with performance simulations of a lathe-head-stock design, focusing on gear transmission with synthesized errors.


1996 ◽  
Vol 8 (2) ◽  
pp. 99-115 ◽  
Author(s):  
R. S. Srinivasan ◽  
K. L. Wood ◽  
D. A. McAdams

2012 ◽  
Vol 63 (3) ◽  
pp. 210-221 ◽  
Author(s):  
Robin Chavanne ◽  
Bernard Anselmetti

Procedia CIRP ◽  
2018 ◽  
Vol 75 ◽  
pp. 179-184 ◽  
Author(s):  
Laurent Pierre ◽  
Bernard Anselmetti ◽  
Nabil Anwer

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