1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 17450-1:2011Geometrical productspecifications (GPS) GeneralconceptsPart 1: Model for geometrical specificationand verification (ISO 17450-1:2011)Copyright European Comm
2、ittee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17450-1:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO17450-1:2011. It supersedes DDCENISO/TS17
3、450-1:2007 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TDW/4, Technical Product Realization.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessar
4、yprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012ISBN 978 0 580 66730 5ICS 17.040.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandard
5、s Policy and Strategy Committee on 31 January 2012.Amendments issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EU
6、ROPENNE EUROPISCHE NORM EN ISO 17450-1 December 2011 ICS 17.040.01 Supersedes CEN ISO/TS 17450-1:2007English Version Geometrical product specifications (GPS) - General concepts - Part 1: Model for geometrical specification and verification (ISO 17450-1:2011) Spcification gomtrique des produits (GPS)
7、 - Concepts gnraux - Partie 1: Modle pour la spcification et la vrification gomtriques (ISO 17450-1:2011) Geometrische Produktspezifikation (GPS) - Grundlagen - Teil 1: Modell fr die geometrische Spezifikation und Prfung (ISO 17450-1:2011) This European Standard was approved by CEN on 10 December 20
8、11. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained
9、on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CEN
10、ELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malt
11、a, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of explo
12、itation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17450-1:2011: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17450-1
13、:2011EN ISO 17450-1:2011 (E) 3 Foreword This document (EN ISO 17450-1:2011) has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification“ in collaboration with Technical Committee CEN/TC 290 “Dimensional and geometrical product specificatio
14、n and verification” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2012, and conflicting national standards shall be withdrawn at the latest by Jun
15、e 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CEN ISO/TS 17450-1:2007. According to the CEN/CENELEC
16、 Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
17、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 17450-1:2011 has been approved by CEN as a EN ISO 17450-1:2011 without any modification. Copyright European Committee for Stand
18、ardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17450-1:2011ISO 17450-1:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 1 3 Terms and defi
19、nitions . 1 4 Application and future prospects 11 5 General . 11 6 Features 12 6.1 General . 12 6.2 Ideal features . 13 6.3 Non-ideal features . 15 6.4 Relationships between geometrical feature terms 16 7 Characteristics . 18 7.1 General . 18 7.2 Intrinsic characteristics of ideal features . 18 7.3
20、Situation characteristics between ideal features . 19 7.4 Situation characteristics between non-ideal and ideal features 20 8 Operations 21 8.1 Feature operations 21 8.2 Evaluation 25 8.3 Transformation 26 9 Specification 26 9.1 General . 26 9.2 Specification by dimension 26 9.3 Specification by zon
21、e 27 9.4 Deviation 27 10 Verification . 28 Annex A (informative) Examples of applications to ISO 1101 29 Annex B (informative) Mathematical symbols and definitions . 43 Annex C (informative) Comparison between tolerancing and metrology . 55 Annex D (informative) Concept diagram for characteristics 5
22、7 Annex E (informative) Invariance classes 58 Annex F (informative) Relationship to the GPS matrix model 60 Bibliography 62 Alphabetical index 63 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without licen
23、se from IHS-,-,-BS EN ISO 17450-1:2011ISO 17450-1:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out
24、 through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO col
25、laborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International S
26、tandards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements
27、 of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 17450-1 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product specifications and verification. This first edition of ISO 17450-1 c
28、ancels and replaces ISO/TS 17450-1:2005, which has been technically revised. It also incorporates the Technical Corrigendum ISO/TS 17450-1:2005/Cor.1:2007. ISO 17450 consists of the following parts, under the general title Geometrical product specifications (GPS) General concepts: Part 1: Model for
29、geometrical specification and verification Part 2: Basic tenets, specifications, operators, uncertainties and ambiguities Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN IS
30、O 17450-1:2011ISO 17450-1:2011(E) ISO 2011 All rights reserved vIntroduction This part of ISO 17450 is a geometrical product specification (GPS) document and is to be regarded as a global GPS document (see ISO/TR 14638). It influences all chain links of the chains of standards. The ISO/GPS Masterpla
31、n given in ISO/TR 14638 gives an overview of the ISO/GPS system of which this document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this document, unless otherw
32、ise indicated. For more detailed information on the relationship of this part of ISO 17450 to other standards and to the GPS matrix model, see Annex F. In a market environment of increased globalization, the exchange of technical product information is of high importance and the need to express unam
33、biguously the geometry of mechanical workpieces of vital urgency. Consequently, codification associated with the macro- and micro-geometry of workpiece specifications needs to be unambiguous and complete if the functional geometrical variation of parts is to be limited; in addition, the language oug
34、ht to be applicable to CAx systems. The aim of ISO/TC 213 is to provide the tools for a global and “top-down” approach to GPS. These tools form the basis of new standards specifying a common language for geometrical definition. This language can be used by design (assemblies and individual workpiece
35、s), manufacturing and inspection, to describe the measurement procedure, regardless of the media (e.g. a paper drawing, numerical drawing or exchange file) used. The tools are based on the characteristics of features, as well as on the constraints between the features and on feature operations, used
36、 for the creation of different geometrical features. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17450-1:2011Copyright European Committee for Standardization Provid
37、ed by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17450-1:2011INTERNATIONAL STANDARD ISO 17450-1:2011(E) ISO 2011 All rights reserved 1Geometrical product specifications (GPS) General concepts Part 1: Model for geometrical sp
38、ecification and verification 1 Scope This part of ISO 17450 provides a model for geometrical specification and verification and defines the corresponding concepts. It also explains the mathematical basis of the concepts associated with the model and defines general terms for geometrical features of
39、workpieces. This part of ISO 17450 defines the fundamental concepts for the GPS system in order to: provide nonambiguous GPS language to be used in design, manufacturing and verification, identify features, characteristics and rules to provide the basis for specifications, provide a complete symbolo
40、gy language to indicate GPS specifications, provide simplified symbology by defining default rules, and provide consistent rules for verification. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition
41、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC Guide 99, International vocabulary of metrology Basic and general concepts and associated terms (VIM) 3 Terms and definitions For the purposes of this document, the terms
42、and definitions given in ISO/IEC Guide 99 and the following apply. 3.1 real surface of a workpiece set of features which physically exist and separate the entire workpiece from the surrounding medium Copyright European Committee for Standardization Provided by IHS under license with CENNot for Resal
43、eNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17450-1:2011ISO 17450-1:2011(E) 2 ISO 2011 All rights reserved3.2 surface model model representing the set of physical limits of the virtual or the real workpiece NOTE 1 This model applies to all closed surfaces. NOTE 2
44、The surface model allows the definition of single features, sets of features, and/or portions of features. The total product is modelled by a set of surface models corresponding to each workpiece. 3.2.1 nominal model of a workpiece model of the perfect shape defined by the designer NOTE The nominal
45、model represents the design intent. 3.2.2 non-ideal surface model skin model of a workpiece model of the physical interface of the workpiece with its environment NOTE See Clause 5. 3.3 geometrical feature point, line, surface, volume or a set of these items NOTE 1 The non-ideal surface model is a pa
46、rticular type of geometrical feature, corresponding to the infinite set of points defining the interface between the workpiece and its surroundings. NOTE 2 A geometrical feature can be an ideal feature or a non-ideal feature, and can be considered as either a single feature or a compound feature. 3.
47、3.1 ideal feature feature defined by a parametrized equation NOTE 1 The expression of the parametrized equation depends on the type of ideal feature and on its intrinsic characteristics. NOTE 2 By default, an ideal feature is infinite. To change its nature, it is appropriate to specify this by addin
48、g the term “restricted” as in “restricted ideal feature”. 3.3.1.1 attribute of an ideal feature property intrinsically attached to an ideal element NOTE 1 Four levels of attributes can be defined for an ideal feature: 1) shape; 2) dimensional parameters from which a size can be defined in the case of dimensional feature; 3) situation feature; and 4) skeleton (when the size is set equal to zero). NOTE 2 If the ideal feature is a feature of size, then one of parameters of the shape can be considered as a size. 3.3.1.1.1 dimensional parameter linear or angular di
