1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 9300-110 Edition P 2 June 2016 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.orgICS: Supersedes editio
2、n P 1 of May 2012 Descriptors: ENGLISH VERSION Aerospace series LOTAR LOng Term Archiving and Retrieval of digital technical product documentation such as 3D, CAD and PDM data Part 110: CAD mechanical 3D Explicit geometry information Luft- und Raumfahrt LOTAR Langzeitarchivierung und Bereitstellung
3、digitaler technischer Produktdokumentationen beispielsweise 3D CAD und PDM Daten Teil 110: Explizite Geometrie Srie arospatiale LOTAR Archivage long terme et rcupration des donnes techniques produits numriques telles que CAD 3D et PDM Partie 110 : Archivage long terme et rcupration des informations
4、CAO This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the conc
5、erned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and for
6、mal agreement of ASD-STAN, the ASD-STAN prEN will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the
7、 EN the status of a national standard and by withdrawing any national standards conflicting with the EN. ASD-STAN Technical Committee approves that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary, and its appli
8、cability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelled. ASD-STAN
9、invites you to send your written comments or any suggestions that may arise. All rights reserved. No parts of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior wri
10、tten permission of ASD-STAN. Order details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1stJune 2016 Comments should be sent within six months after the date of publication to ASD-STAN Engineering Procedures Domain Copyright 2016 ASD-STAN prEN 9300
11、-110:2016 (E) 2 Foreword This standard was prepared jointly by AIA, ASD-STAN, PDES Inc and the PROSTEP iViP Association. The PROSTEP iViP Association is an international non-profit association in Europe. For establishing leadership in IT-based engineering it offers a moderated platform to its nearly
12、 200 members from leading industries, system vendors and research institutions. Its product and process data standardization activities at European and worldwide levels are well known and accepted. The PROSTEP iViP Association sees this standard and the related parts as a milestone of product data t
13、echnology. PDES Inc is an international non-profit association in USA. The mission of PDES Inc is to accelerate the development and implementation of ISO 10303, enabling enterprise integration and PLM interoperability for member companies. PDES Inc gathers members from leading manufacturers, nationa
14、l government agencies, PLM vendors and research organizations. PDES Inc. supports this standard as an industry resource to sustain the interoperability of digital product information, ensuring and maintaining authentic longevity throughout their product lifecycle. Readers of this standard should not
15、e that all standards undergo periodic revisions and that any reference made herein to any other standard implies its latest edition, unless otherwise stated. The Standards will be published under two different standards organizations using different prefixes. ASD-STAN will publish the standard under
16、 the number EN 9300xxx. AIA will publish the standard under the number NAS 9300xxx. The content in the EN 9300 and NAS 9300 documents will be the same. The differences will be noted in the reference documentation (i.e. for EN 9300 Geometric Dimensioning Essential information of CAD 3D explicit geome
17、try (solids, curves, surfaces, and points) to be preserved (see chapter 6); Data structures detailing the main fundamentals and concepts of CAD 3D explicit geometry (see chapter 7); Verification rules to check CAD 3D explicit geometry for consistency and data quality (see chapter 8); Validation rule
18、s to be stored with the CAD 3D explicit geometry in the archive to check essential characteristics after retrieval (see chapter 9). NOTE This includes the geometrical external shape resulting from CAD disciplines 3D entities (e.g., 3D Structural components, 3D Tubing, 3D electrical harness, 3D compo
19、site, etc.). 1.3 Out of scope The following is outside the scope of this part of EN 9300: The formal definition of validation and verification rules to check 3D explicit geometry for consistency and data quality using a machine-readable syntax; Implicit or parametric geometry; Geometric Dimensioning
20、 Assembly structures; Presentation of explicit geometry. prEN 9300-110:2016 (E) 6 2 Normative references This Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are l
21、isted hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 9300 (Al
22、l parts), Aerospace series LOTAR LOng Term Archiving and Retrieval of digital technical product documentation such as 3D, CAD and PDM data ISO 1101:2012, Geometrical product specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-out ISO 2768-1:1989, General to
23、lerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (First Edition) ISO 2768-2:1989, General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications (First Edition) ISO 10303-42:2003, Industrial automation sys
24、tems and integration Product data representation and exchange Part 42: Integrated generic resource: Geometric and topological representation ISO 10303-59:2014, Industrial automation systems and integration Product data representation and exchange Part 59: Integrated generic resource Quality of produ
25、ct shape data ISO 10303-203:2011, Industrial automation systems and integration Product data representation and exchange Part 203: Application protocol: Configuration controlled 3D design of mechanical parts and assemblies ISO 10303-214:2010, Industrial automation systems and integration Product dat
26、a representation and exchange Part 214: Application protocol: Core data for automotive mechanical design processes ISO 10303-242:2014, Industrial automation systems and integration Product data representation and exchange Part 242: Application protocol: Managed model-based 3D engineering ISO 10303-5
27、14:1999, Industrial automation systems and integration Product data representation and exchange Part 514: Application interpreted construct: Advanced boundary representation ISO 16792:2006, Technical product documentation Digital product definition data practices ASME Y14.5:2009, Dimensioning and To
28、lerancing ASME Y14-41:2012, Digital Product Definition Data Practices FAA Part 21, Certification for Products, Parts it is assumed that the precisions of the modellers will increase overtime. They are also related to the categories of parts and to their functions. prEN 9300-110:2016 (E) 9 As mention
29、ed in the EN 9300-002, there are 4 main use cases for long-term archiving and retrieval of CAD 3D exact geometry, and its complementary 2D drawings: Documentation of Aerospace Aerospace Design Re-use Product modification; Product Lifecycle Support and Disposal. These use cases are detailed in the co
30、ntext of long term preservation of CAD mechanical 3D explicit geometry information. For more information see Annex A. 5.3 Description of file content Scenario 1: Part file with exact geometry only; Scenario 2: Part file with tessellated geometry only; Scenario 3: Part file with exact and tessellated
31、 geometry; Scenario 4: Part file containing an Assembly mixing exact and tessellated geometry (Example: Equipment internal geometry) see EN 9300-115 and EN 9300-125. 6 Essential Information of explicit geometry Essential information of 3D explicit geometry, captured in archive files, is defined as:
32、The exact boundary representation shape of a single part within free tolerances of manufacturing (e.g. according to ISO 2768 general tolerances). The tessellated boundary representation shape; The exact representation of curves; The tessellated representation of curves; The exact representation of s
33、urfaces; The tessellated representation of surfaces; The representation of points. The EN 9300 standards shall be applied to any additional information not covered by this standard. 7 Definition of Core Model for an explicit geometry To preserve the essential information of explicit 3D geometry the
34、shape should be represented at nominal size precisely and completely within the defined tolerances independent of tool specific generation functions for geometry. Therefore a boundary representation as an accumulative topological and geometric volume model has been chosen as core model for this part
35、 of EN 9300. prEN 9300-110:2016 (E) 10 This core model is defined by ISO 10303-514 (Advanced boundary representation) and ISO 10303-42 (geometric and topological representation). This representation is used by ISO 10303-203 (Configuration Controlled 3D Design of Mechanical Parts and Assemblies) CC08
36、, ISO 10303-214 (Core Data for Automotive Mechanical Design Processes) CC02 and ISO 10303-242 (Managed Model Based 3D Engineering). Therefore STEP physical files meeting ISO 10303-203 CC08 or ISO 10303-214 CC02 or ISO 10303-242 may be used for the ingest of explicit geometry. The Descriptive Informa
37、tion of the AIP shall document the versions of both EN 9300-110 and ISO 10303 application protocol that are basis for the AIP 1). Other geometric information or information related to geometry such as design history, layer information, auxiliary geometry or technical attributes like roughness or tol
38、erances as modelled in typical CAD systems may be maintained together with the 3D explicit geometry within the same STEP file, assuming that this information can be represented by the chosen application protocol of ISO 10303. In this case additional validation properties and verification rules defin
39、ed in the respective parts of EN 9300 should be applied to ensure the preservation of this additional information. 8 Verification rules of explicit geometry 8.1 Introduction As described in “Authentication and Verification“ (EN 9300-005), verification is one of the two basic qualification methods to
40、 reduce the risk of losing essential information during Long Term Archiving. The verification of the source and the target CAD model are not required in this standard, but the quality of the exported file in the archival format is strongly dependant of the quality of the source CAD model, and lack o
41、f verification creates a risk that the retrieval process will fail. The verification for 3D explicit geometry described in this chapter concerns only the archival file during the ingest process (EN 9300-012). To improve the longevity of the archive, companies may decide to add new verification rules
42、 and to check a selection of the archived files. In this case, the company may decide to archive the new verification report, and according to the result, to carry out the appropriate action to ensure the long term preservation of the CAD archived information. If a verification of the native target
43、CAD model is implemented in the retrieval process (EN 9300-014), the CAD model shall pass the validation process before the model will be fully acceptable. Verification process is required to minimize the risk of data loss or unacceptable change between archival and retrieval. This process shall be
44、applied to the STEP file during archival ingestion, to the STEP file after any archival preservation conversion. It is strongly recommended that this process is also applied to the target CAD model after STEP import. 8.2 Level of Verification Conversion of CAD models between different formats may le
45、ad to the loss of geometrical and topological elements. To minimize the risk of such kind of problems, companies shall choose one of the following three levels of verification: Verification level 0, no verification, which entails accepting the maximum risk of failure at retrieval; Verification level
46、 1, with an controlled risk, and using list of verification rules defined below; Verification level 2, with a minimum risk by the use of verification level 1 rules, plus additional verification rules defined by the company. 1) AIP: Archive Information Package. (See part EN 9300-007 “Terms and defini
47、tions“). prEN 9300-110:2016 (E) 11 For exact solid and surface, the rules for the verification level 1 are a subset of the rules defined in the SASIG PDQ, ISO 10303-59, which provides a definition for each rule, an illustration of the defects detected by the rule, and, where possible, a method to fi
48、x the defects. For tessellated solid and surface, the verification rule level 1 can consist of a check such as a watertight tessellation. For verification level 2, companies may check using their own verification rules. See Annexe D (informative) Recommended verification rules level 1 and 2. For exa
49、mple 1, multiple identical elements (points, curves, surfaces) can be problematic for some business case, and the distance between two identical elements need to be within a given tolerance that may change from one system to another system (e.g., change of generation of CAD modellers). For example 2, specific rules for the verification of the structure of the CAD model (colour and layers) may be added. Some rules are parameterised by acceptance thresholds. For the long term retenti
