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Library of T-Maps for Dimensional and Geometric Tolerances

[+] Author Affiliations
Shyam S. Rao, Payam Haghighi, Jami J. Shah, Joseph K. Davidson

Arizona State University, Tempe, AZ

Paper No. DETC2014-35273, pp. V004T06A019; 10 pages
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 19th Design for Manufacturing and the Life Cycle Conference; 8th International Conference on Micro- and Nanosystems
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4635-3
  • Copyright © 2014 by ASME


Tolerances are specified by a designer to allow reasonable freedom by a manufacturer for imperfections and inherent variability without compromising performance. T-Map is a hypothetical Euclidian point space model which describes all possible variations constrained by design or machining tolerances. The size and shape of T-Map reflects all variational possibilities for a target feature. According to ASME Y14.5M standard, tolerances are dimensional or geometric, and geometric tolerances are divided into different classes. T-maps have been created for all types of geometric tolerances with Primitive T-Map Elements. In this paper we have reviewed the basic ideas of T-maps, the reason it has been built, and the contribution it can have in design and manufacturing. It is then followed by a library of T-maps created for all Tolerance classes with brief description for each one.

Copyright © 2014 by ASME



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