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4. Reference system
4.1 Association of a nominal model with the real part
In a mechanism, parts are assembled using positioning surfaces that lock the various degrees of freedom. The reference system describes the surfaces used to position the parts, identifying the order of priority of the references.
Part assembly requires internal dimensioning within each reference system. The mechanism's other functional requirements impose links between reference systems or the position of functional surfaces...
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Reference system
Compound specified entities
Bibliography
Standards and norms
- Geometric product specification (GPS) – ISO coding system for linear size tolerances – Part 1: Basics of tolerances, deviations and fits - NF EN ISO 286-1 - 2010
- ISO metric threads for general use – Tolerances – Part 1: Principles and fundamentals - NF ISO 965-1 - 2013
- Geometric product specification (GPS) – Geometric tolerancing – Form, orientation, position and runout tolerancing - NF EN ISO 1101 - 2017 ...
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