NDLI: Tolerance Analysis of Parallel Assemblies Using Tolerance-Maps® and a Functional Map Derived From Induced Deformations

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jaishankar, Lupin Niranjan Joseph, K. Davidson Jami, J. Shah
Copyright Year	2013
Abstract	This paper concerns about modeling tolerance accumulation in parallel assemblies using a spatial math model, the T-Map. In this paper, a specific case in 3D is discussed where an Accumulation Tolerance-Map is modeled when two parts arranged in parallel support a target part between the datum and the functional target feature. By understanding how much of variation from the supporting parts contribute to variations of the target feature, a designer can better utilize the tolerance budget when assigning values to individual tolerances. When the parts are flexible, deformations are induced when parts in parallel are clamped together during assembly. The amount of deformations on the target part depends on the geometric manufacturing variations on the support parts in parallel assemblies. When parts are clamped stresses are induced in more than one direction depending on the type and amount of geometric variation on the supports. The next part of this paper relates the limit on the largest von Mises stress in the target part to the functional limits in tolerance allocation that must be set at the beginning of a tolerance analysis of parts in such an assembly by the designer. The last part of the paper shows the construction of a Functional Tolerance Map from the tolerance limits obtained from the relationship between von Mises stresses and tolerances on individual parts.
Sponsorship	Design Engineering Division Computers and Information in Engineering Division
File Format	PDF
ISBN	9780791855898
DOI	10.1115/DETC2013-12394
Volume Number	Volume 3B: 39th Design Automation Conference
Conference Proceedings	ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Language	English
Publisher Date	2013-08-04
Publisher Place	Portland, Oregon, USA
Access Restriction	Subscribed
Subject Keyword	Construction Deformation Tolerance analysis Mathematics Manufacturing Tolerance modeling Stress
Content Type	Text
Resource Type	Article

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