Assembly specification by Gauge with Internal Mobilities (GIM)—A specification semantics deduced from tolerance synthesis

Currently, standards such as ISO 1101 are used for the geometrical specification of mechanical parts. However, these standards are not sufficient to express exact functional requirements, even for assembly. The objective of this paper is to determine what to express exactly for assembly, that is, cr...

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Bibliographic Details
Published in:Journal of manufacturing systems 2002-01, Vol.21 (3), p.218-235
Main Authors: Dantan, Jean-Yves, Ballu, Alex
Format: Article
Language:English
Subjects:
Assembly
Contact
Engineering Sciences
Euclidean space
Gauge
Gauges
Geometrical Product Specification
Geometry
Manufacturing
Materials
Mathematical models
Product life cycle
Quality standards
Semantics
Specifications
Studies
Systems design
Tolerance Synthesis
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Summary:Currently, standards such as ISO 1101 are used for the geometrical specification of mechanical parts. However, these standards are not sufficient to express exact functional requirements, even for assembly. The objective of this paper is to determine what to express exactly for assembly, that is, create the necessary specification semantics. A tolerance synthesis model is developed based on variational geometry. The model takes into account not only manufacturing deviations and gaps, but also the assembly process and nature of contacts between parts. The specification semantics is deduced from this tolerance synthesis. This semantics is based on virtual gauges, which are composed of an interface with the part and of a structure. The main contribution on the virtual gauge is the concept of internal mobilities allowing displacements between different entities of the gauge. This gauge takes also in account the nature of the contact between parts.
ISSN:0278-6125
1878-6642
DOI:10.1016/S0278-6125(02)80163-7