1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 17450-2:2012Geometrical product specifications (GPS) General conceptsPart 2: Basic tenets, specifications, operators, uncertainties and ambiguities BS EN ISO 17450-2:20
2、12 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 17450-2:2012. It supersedes DD ISO/TS 17450-2:2002 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical Product Realization.A list of organizations
3、 represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012ISBN 9
4、78 0 580 66731 2 ICS 17.040.01 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate T e x t a f f e c t e dEUR
5、OPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17450-2 October 2012 ICS 17.040.01 English Version Geometrical product specifications (GPS) - General concepts - Part 2: Basic tenets, specifications, operators, uncertainties and ambiguities (ISO 17450-2:2012) Spcification gomtrique des produits
6、 (GPS) - Concepts gnraux - Partie 2: Principes de base, spcifications, oprateurs, incertitudes et ambiguts (ISO 17450-2:2012)Geometrische Produktspezifikation und -prfung (GPS) - Allgemeine Begriffe - Teil 2: Grundlegende Lehrstze, Spezifikationen, Operatoren, Unsicherheiten und Mehrdeutigkeiten (IS
7、O 17450-2:2012) This European Standard was approved by CEN on 15 September 2012. 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 b
8、ibliographical references concerning such national standards may be obtained 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 res
9、ponsibility of a CEN member into its own language and notified to the CEN-CENELEC 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, Former Yugoslav R
10、epublic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NO
11、RMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17450-2:2012: EBS EN ISO 17450-2:2012 BS EN ISO 17450-2:2012EN ISO 17450-2:201
12、2 (E) 3 Foreword This document (EN ISO 17450-2:2012) 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 specification and verification” the
13、 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 April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is
14、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. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the foll
15、owing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
16、Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17450-2:2012 has been approved by CEN as a EN ISO 17450-2:2012 without any modification. BS EN ISO 17450-2:2012 ISO 17450-2:2012(E) ISO 2012 All rights
17、 reserved iiiContents PageForeword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions . 13.1 Terms related to operations 23.2 Terms related to operators 33.3 Terms related to uncertainty 73.4 Terms related to specifications . 94 Basic tenets 115 Impact of uncertainty on b
18、asic tenets . 115.1 Impact of ambiguity of the description of the function and ambiguity of specification 115.2 Impact of method and implementation uncertainties . 12 6 Specification process .12 7 Verification process 13 Annex A (informative) Concept diagram.14 Annex B (informative) Drawing indicati
19、ons .15 Annex C (informative) Relationship to the GPS matrix model . .16 Bibliography .18BS EN ISO 17450-2:2012ISO 17450-2:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Interna
20、tional Standards is normally carried out 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
21、ISO, also take part in the work. ISO collaborates 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 co
22、mmittees is to prepare International Standards. 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
23、possibility that some of the elements 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 17450-2 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product specifications and verification.
24、This first edition of ISO 17450-2 cancels and replaces ISO/TS 17450-2:2002, which has been technically revised. It also incorporates ISO/TS 17450-2/Cor.1:2004.ISO 17450 consists of the following parts, under the general title Geometrical product specifications (GPS) General concepts: Part 1: Model f
25、or geometrical specification and verification Part 2: Basic tenets, specifications, operators, uncertainties and ambiguitiesiv ISO 2012 All rights reservedBS EN ISO 17450-2:2012ISO 17450-2:2012(E)IntroductionThis part of ISO 17450 is a Geometrical Product Specifications (GPS) standard and is to be r
26、egarded as a global GPS standard (see ISO/TR 14638). It influences all chain links in all chains of standards in the general GPS matrix.The ISO/GPS Masterplan 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
27、 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 otherwise indicated.For more detailed information on the relationship of this part of ISO 17450 to other standards and to the GPS matrix model, see A
28、nnex C.This part of ISO 17450 covers several fundamental issues common to all the GPS standards developed by ISO/TC 213 and, by presenting GPSs basic tenets and specification and verification processes, explains some of the underlying ideas and indicates the starting point for the standards develope
29、d by this technical committee.It is pointed out that these ideas and, for that matter, all the other ideas and concepts applied by ISO/TC 213 are subject to development and refinement, as the TCs recognition and understanding of them further evolves during its ongoing standards work. ISO 2012 All ri
30、ghts reserved vBS EN ISO 17450-2:2012BS EN ISO 17450-2:2012Geometrical product specifications (GPS) General concepts Part 2: Basic tenets, specifications, operators, uncertainties and ambiguities1 ScopeThis part of ISO 17450 defines terms related to specifications, operators (and operations) and unc
31、ertainties used in geometrical product specifications (GPS) standards. It presents the basic tenets of the GPS philosophy while discussing the impact of uncertainty on those tenets, and examines the processes of specification and verification as they apply to GPS.2 Normative referencesThe following
32、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 document (including any amendments) applies. ISO 14253-2:2011, Geometrical product specifications (GPS) Insp
33、ection by measurement of workpieces and measuring equipment Part 2: Guidance for the estimation of uncertainty in GPS measurement, in calibration of measuring equipment and in product verificationISO 14660-1:1999, Geometrical Product Specifications (GPS) Geometrical features Part 1: General terms an
34、d definitionsISO 14978:2006, Geometrical product specifications (GPS) General concepts and requirements for GPS measuring equipmentISO 17450-1:2011, Geometrical product specifications (GPS) General concepts Part 1: Model for geometrical specification and verificationISO/IEC Guide 98-3:2008, Uncertai
35、nty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)ISO/IEC Guide 99:2007, International vocabulary of metrology Basic and general concepts and associated terms (VIM)3 Terms and definitionsFor the purposes of this document, the terms and definitions given in IS
36、O 14253-2, ISO 14660-1, ISO 14978, ISO 17450-1, ISO/IEC Guide 98-3, ISO/IEC Guide 99 and the following apply. See Figure A.1 for a concept diagram giving an overview of the relationships between these terms; it is recommended that this figure be consulted first.INTERNATIONAL STANDARD ISO 17450-2:201
37、2(E) ISO 2012 All rights reserved 1BS EN ISO 17450-2:2012ISO 17450-2:2012(E)3.1 Terms related to operations3.1.1specification operationoperation formulated using mathematical expressions, geometrical expressions or algorithms, or a combination of these, defining part of the specificationNOTE 1 Speci
38、fication operations are used as part of a specification operator (3.2.3), in order to define a GPS requirement for a work-piece (product or component).NOTE 2 A specification operation is a theoretical concept.EXAMPLE 1 Association of a minimum circumscribed cylinder in the specification of the diame
39、ter of a shaft.EXAMPLE 2 Filtration by a Gaussian filter in the specification of a surface texture requirement.3.1.2default specification operationspecification operation (3.1.1) which is applied to a basic GPS specification (3.4.4) in the absence of any additional information or modifierNOTE 1 The
40、default specification operation may be a global default (ISO default), company default or drawing default specification operation.NOTE 2 The default specification operation depends on the context in which the default specification operator is applied.EXAMPLE 1 Evaluation of a two-point diameter in t
41、he specification of the diameter of a shaft using the default indication 30 0,1.EXAMPLE 2 Filtration by a Gaussian filter (default filter) with the default cut-off length given in ISO 4288 in the specification of Ra for a surface.3.1.3special specification operationspecification operation (3.1.1) wh
42、ich is applied to a basic GPS specification (3.4.4) to change or modify a default specification operation (3.1.2) for this basic GPS specification with additional information or one or more modifiersEXAMPLE 1 The association of a minimum circumscribed cylinder in the specification of the diameter of
43、 a shaft, when the modifier symbol, , for envelope requirement, is used (see ISO 14405-1).EXAMPLE 2 The filtration by a Gaussian filter (default filter) with a special cut-off length of 2,5 mm in the specification of Ra for a surface, when the appropriate indication is used to override the default r
44、ules in ISO 4288.3.1.4actual specification operationspecification operation (3.1.1) which is indicated implicitly (in the case of a default specification operation) or explicitly (in the case of a special specification operation) in a GPS requirement indicated in the technical product documentation
45、under considerationNOTE An actual specification operation can be: indicated implicitly by an ISO basic GPS specification (3.4.4), or; indicated explicitly by a GPS specification element (3.4.1), or; omitted when the specification operator is not complete.EXAMPLE 1 Evaluation of a two-point default d
46、iameter in an actual specification operation, such as when the specification 30 0,1 is used (see ISO 14405-1).EXAMPLE 2 Filtration by a Gaussian filter (default filter) with a special cut-off length of 2,5 mm, and the calculation of a surface texture requirement using the Ra algorithm, are two actua
47、l specification operations, when the specification indicates Ra 1,5 with a 2,5 mm filter.2 ISO 2012 All rights reservedBS EN ISO 17450-2:2012ISO 17450-2:2012(E)3.1.5verification operationoperation which is implemented in the form of a measurement, or by means of a measurement apparatus, or a combina
48、tion of these, which corresponds to an actual specification operation (3.1.4)NOTE 1 Verification operations are used in the geometrical field of mechanical engineering to verify a product to the corresponding specification operation (3.1.1).NOTE 2 A verification operation is used to verify the requi
49、rements of a specification operation (3.1.1).EXAMPLE 1 Evaluation of a two-point diameter when verifying the diameter of a shaft using a micrometer, for instance.EXAMPLE 2 Extraction of data points from a surface for surface finish verification using a nominal stylus tip radius of 2 m and a sample spacing of 0,5 m.3.1.6perfect verification operationverification operation (3.1.5) which implements an ideal method of verifying an actual specification operation (3.1.4) with no intentional deviation from its require
