ASD-STAN PREN 9300-100-2012 Aerospace series LOTAR LOng Term Archiving and Retrieval of digital technical product documentation such as 3D CAD and PDM data Part 100 Common concepts.pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 9300-100 Edition P 1 May 2012 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.orgICS: Descriptors: ENGLI

2、SH VERSION Aerospace series LOTAR LOng Term Archiving and Retrieval of digital technical product documentation such as 3D, CAD and PDM data Part 100: Common concepts for Long term archiving and retrieval of CAD 3D mechanical information Srie arospatiale LOTAR Archivage Long Terme et rcupration des d

3、onnes techniques produits numriques, telles que CAD 3D et PDM Partie 100 : Concepts communs pour larchivage long terme et la rcupration des donnes CAO 3D mcanique Luft- und Raumfahrt LOTAR Langzeitarchivierung und Bereitstellung digitaler technischer Produktdokumentationen, beispielsweise 3D CAD und

4、 PDM Daten Teil 100: Allgemeine Konzepte fr die Langzeitarchivierung und Wiederverwendung von 3D CAD Mechanik-Informationen 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

5、 published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affect

6、ed, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full Europ

7、ean Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 01 May 2012 Comments should be sent within six months aft

8、er the date of publication to ASD-STAN Engineering Procedures and Processes Domain Copyright 2012 by ASD-STAN prEN 9300-100:2012 (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

9、association in Europe. For establishing leadership in IT-based engineering it offers a moderated platform to its nearly 200 members from leading industries, system vendors and research institutions. Its product and process data standardization activities at European and worldwide levels are well kno

10、wn and accepted. The PROSTEP iViP Association sees this standard and the related parts as a milestone of product data technology. 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

11、integration and PLM interoperability for member companies. PDES Inc gathers members from leading manufacturers, national government agencies, PLM vendors and research organizations. PDES Inc. supports this standard as an industry resource to sustain the interoperability of digital product informatio

12、n, ensuring and maintaining authentic longevity throughout their product lifecycle. Readers of this standard should note 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 p

13、ublished under two different standards organizations using different prefixes. ASD-Stan will publish the standard under 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

14、 in the reference documentation (i.e. for EN 9300 Geometric Dimensioning The document structure of the EN 9300-1XX family, and the links between all these parts; The qualification methods for long term preservation of archived CAD mechanical information; more specially, principles for the CAD valida

15、tion properties and for verification of the quality of the CAD archived file; Specifications for the preservation planning of archived CAD information; Specific functions for administration and monitoring of CAD archived mechanical models; The definition of Archive Information Packages for CAD data.

16、 1.3 Out of Scope The following are out of scope for this part: Long Term Archiving of CAD 2D drawings; Other CAD business disciplines, such as piping, tubing, electrical harnesses, composite, sheet metal design, kinematics. This version does not include: Fundamental and concepts for parts EN 9300-1

17、20 version 2, EN 9300-125, 1 EN 9300-130. prEN 9300-100:2012 (E) 7 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docu

18、ment (including any amendments) applies.EN 9300 (All parts), Aerospace series LOTAR LOng Term Archiving and Retrieval of digital technical product documentation such as 3D, CAD and PDM data ISO 10303-203:2011, Industrial automation systems and integration Product data representation and exchange Par

19、t 203: Application protocol: Configuration controlled 3D design of mechanical parts and assemblies ISO 10303-214:2010, Industrial automation systems and integration Product data representation and exchange Part 214 Application protocol: Core data for automotive mechanical design processes ISO 10303-

20、239:2005, Industrial automation systems and integration Product data representation and exchange Part 239 Application protocol: Product life cycle support ISO 16792:2006, Technical product documentation Digital product definition data practices ISO 1101:2004, Geometrical Product Specifications (GPS)

21、 Geometrical tolerancing Tolerances of form, orientation, location and run-out 3 Terms, definitions and abbreviations For the purposes of this standard, the terms, definitions and abbreviations given in EN 9300-007 shall apply. In addition EN 9300-100 offers further definitions of common terms as fo

22、llowing. 3.1 CAD 3D mechanical 3D Mechanic CAD covers the definition of the physical shape of a component, the positioning of components within an assembly, and the information about shape - such as tolerances or surface finish - which constrains the results of a manufacturing process, but does not

23、specify the process itself. It may include a record of the geometrical operations, such as trimming a surface, which allow the shape to be subsequently edited, but excludes parametric design, in which shapes are generated using specific knowledge embedded in the CAD software. 3.2 CAD 3D geometry CAD

24、 3D Geometry is the representation of the geometric aspects of the part or assembly, using concepts such as point, line, cube, etc. For more information: See Annex B. 3.3 CAD 3D topology Although some classes of CAD modeller explicitly represent volumes (e.g. Constructive Solid Geometry), many repre

25、sent volumes indirectly by representing only their surfaces or, in the case of wire frame modellers, only the edges. CAD 3D topology covers the system of relationships needed to interpret a collection of lower dimensional geometric elements as a 3D volume. For more information: See Annex B. prEN 930

26、0-100:2012 (E) 8 3.4 “Explicit“ representation of a CAD model In the context of engineering and 3D geometrical the term explicit representation refers to the mathematical representation of the final result of the CAD model., From the designers point of view, it corresponds to the 3D shape (points, c

27、urves, surfaces, solids), together with Geometric Dimensions and Tolerancing. Explicit 3D shape may be associated with non-geometric data including design management meta-data such as layer, colour or group or user defined properties. These non-geometric data are optional, and are added by users and

28、 checked and validated by specific tools. 3.5 “Implicit“ representation of a CAD model A CAD model is uses an implicit representation if its geometrical representation is based on a parameterization (e.g.2D parametric sketches, 3D parametric features such as extrusions of 2D sketches, holes, pockets

29、), together with a set of operations (e.g. extrusion, revolution) or constraints (e.g. perpendicularity, parallelism). The result of the processing of an implicit representation is a CAD 3D explicit representation, which can be used then for geometric operations such as measurement or clash detectio

30、n. 3.6 3D Geometric Dimensioning 3D geometric dimensioning; 3D geometric tolerances. Dimensioning information is required to define the characteristics of the 3D explicit model, e.g. in terms of length or height. This additional information may be linked to one geometrical characteristic, e.g. the l

31、ength of a line. No design geometrical feature can be manufactured to perfection, so the feature description can be extended with tolerance information. Tolerances may come in the form of limits of size applied to given dimensions, with style tolerance applied directly to dimensions or constraints,

32、such as flatness or parallelism, or a general note. 3.7 Geometrical Product Specifications (GPS) Geometrical Product specification is equivalent to GD The second generation of CAD design method is based on the complementary use of essential information defined in 3D models and essential information

33、defined in 2D models (drawings); The third generation of CAD design method is based on the use of essential information defined only in 3D models that contain associative GD Annex B: Overview of the main types of CAD 3D mechanical information; Annex C: Overview of the main CAD mechanical assembly st

34、ructure information; Annex E: Considerations for long term preservation of CAD 3D information. prEN 9300-100:2012 (E) 11 Some algorithms within CAD applications used in the aerospace industry are proprietary and are not available to the public. These algorithms represent a competitive advantage to t

35、he CAD Company. This results in the fact that aerospace manufacturers cannot guarantee the access to all essential design intent in its native format, over the life of the product. The EN 9300-100 describes the methods for preserving CAD mechanical essential information over time, recognising that t

36、he mathematical representation may change between creation of the CAD information to its retrieval and hence after importation, the archived file has to be qualified as acceptable to a level of precision requested by the business function. 5.2 CAD essential information: dependencies on the CAD metho

37、ds used Manufacturers may use different CAD methods for the definition of 3D components. The definition of a part may be based on: 2D drawing only, fully dimensioned and toleranced, derived from a CAD 3D exact model; 2D drawing partially dimensioned and toleranced, derived from a CAD 3D exact model;

38、 3D with GD 3D with GD The type of use cases for retrieval. Figure 3 Type of CAD essential information to archive, depending on the CAD methods used 2D drawing fullydimensionnedand toleranced3D model describedby GD if a company uses method 3, Long Term Archiving and Retrieval of 3D CAD with GD The t

39、ype of customers (civil, defence); The related processes of support. As a result, the aerospace community does not share a single set of use cases. Some use cases are common only to a particular community of aerospace manufacturers, which may share the same legal constraints or business needs. Use c

40、ases specific to a company are not described; these may be related to a particular process, or part of a competitive advantage. Figure 5 illustrates the families of use case. Figure 5 Different levels of commonality of business requirements and use cases The EN 9300-1xx standards describe requiremen

41、ts and use cases for long term archiving and retrieval of CAD mechanical information which are: Common to all the community of aerospace manufacturers; Common to a particular but broad community of aerospace manufacturers, with a scope clearly mentioned, and with the agreement of the aerospace commu

42、nity. Some requirements are not shared by all the aerospace manufacturers. Where a use case is shared by a particular community of aerospace manufacturers, the EN 9300 standard may be extended to include this case. In the case of uses cases particular to a manufacturer, this manufacturer shall apply

43、 the fundamental concepts of the EN 9300 standards relevant to its needs, and document the related process chain and essential information. COMMON TO ALL THE COMMUNITYof aerospace manufacturersCOMMON TO A SPECIFIC COMMUNITYof aerospace manufacturersSPECIFIC TO AN AEROSPACE MANUFACTURERSPECIFIC TO AN

44、 AEROSPACE MANUFACTURERCOMMON TO A SPECIFIC COMMUNITYof aerospace manufacturersSPECIFIC TO AN AEROSPACE MANUFACTURERSPECIFIC TO AN AEROSPACE MANUFACTURERCOMMON TO COMMUNITY OF MANUFACTURERSincluding other industries in addition to aerospaceprEN 9300-100:2012 (E) 14 The next table provides examples o

45、f the types of common business requirements and associated use cases to be shared within a particular aerospace community. Use cases for retrieval of CAD archived information for “support in operation“ may only be particular to a community of aerospace manufacturers. Table 1 Types of business requir

46、ements and use cases to be shared within a particular aerospace community Types of business requirements CertificationProduct Liability Support in operation Reuse Requirements and use cases for Long Term Archiving and in parallel, to migrate the released native CAD format to the native format of the

47、 next generation of CAD system. The essential information of the archived open format is compared to the essential information of the migrated native CAD model. prEN 9300-100:2012 (E) 16 This is illustrated in Figure 7 below. Figure 7 Migration strategies There is a need to identify what is the CAD

48、reference information over the time and corresponding to the use cases of the organization. The qualification of a CAD model as the reference is related to its precise purpose within a well-defined context, relative to the specific processes and methods of each company. According to its specific pro

49、cesses and uses cases, the company shall decide if the archived CAD model is the reference, or if the reference is the CAD native model (initially released, or migrated, or converted from the STEP archive). NOTE For example, the CAD 3D reference model may be used to confirm that the manufactured part conforms to the design. The identification of the use cases where the neutral archived CAD model is the reference allows the company to list the essential information required for the