ČSN EN 9300-120

Letectví a kosmonautika - LOTAR - Dlouhodobá archivace a vyhledávání v digitální technické dokumentaci produktu 3D, CAD a PDM dat - Část 120: Explicitní CAD 3D geometrie s informacemi o grafickém produktu a výrobě (Norma k přímému použití jako ČSN).

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Podrobné informace

Označení: ČSN EN 9300-120

Datum vydání: 01.04.2024

Stran: 32

Země: Česká technická norma

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Anotace

This document is applicable to:
- the Presentation of 3D geometrical dimension and tolerance, and 3D annotation attributes;
- their possible semantic links with 3D Geometric shape;
- User Defined Attributes: that are assigned to 3D geometric entities or at the part level.
For the purpose of this document, the semantic definition is at the level that supports associative "Cross-highlighting", to illustrate the portion of the geometry to which a PMI element applies.
In this version, the technology used to preserve this 3D information is based on polyline and tessellated presentation. Polyline presentation is a conversion to lines and curves of all 3D annotations by the STEP interfaces of the CAD system, including validation properties. Tessellated presentation is a conversion to tessellated curves and tessellated faces. The main use cases are the Certification and Product Liability of static information, however, re-use is also possible after the deletion of previous PMI and creation of new PMI (refer to clause 3 for definition).
This document does not apply to:
- machine-interpretable PMI "Representation";
- how to preserve additional information:
- property rights;
- form features;
- machining features;
- CAD Assemblies

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