1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 22432:2011Geometrical productspecifications (GPS) Featuresutilized in specification andverification (ISO 22432:2011)BS EN ISO 22432:2011 BRITISH STANDARDNational forewo
2、rdThis British Standard is the UK implementation of EN ISO22432:2011.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
3、 not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 57493 1ICS 17.040.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of t
4、heStandards Policy and Strategy Committee on 31 December 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22432 November 2011 ICS 17.040.01 English Version Geometrical product specifications (GPS) - Features utilized in specification
5、and verification (ISO 22432:2011) Spcification gomtrique des produits (GPS) - lments utiliss en spcification et vrification (ISO 22432:2011) Geometrische Produktspezifikation (GPS) - Zur Spezifikation und Prfung benutzte Geometrieelemente (ISO 22432:2011) This European Standard was approved by CEN o
6、n 8 July 2011. 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 b
7、e 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 responsibility of a CEN member into its own language and notified to
8、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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem
9、bourg, Malta, 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 righ
10、ts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22432:2011: EBS EN ISO 22432:2011EN ISO 22432:2011 (E) 3 Foreword This document (EN ISO 22432:2011) has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product sp
11、ecifications and verification“ in collaboration with Technical Committee CEN/TC 290 “Dimensional and geometrical product specification 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 ide
12、ntical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 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 respon
13、sible for identifying any or all such patent rights. According to the CEN/CENELEC 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, Finlan
14、d, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 22432:2011 has been approved by CEN as a EN IS
15、O 22432:2011 without any modification. BS EN ISO 22432:2011ISO 22432:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 1 4 Relations between the geometrical feature terms . 35 Annex A (normative) Overview d
16、iagram . 39 Annex B (informative) Examples of links between the features 45 Annex C (informative) Relation to the GPS matrix model . 48 Bibliography 50 BS EN ISO 22432:2011ISO 22432:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwid
17、e federation of national standards bodies (ISO member bodies). The work of preparing International 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
18、 committee. International organizations, governmental and non-governmental, in liaison with 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 ac
19、cordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees 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 req
20、uires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the 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 22432 was prepared by Techni
21、cal Committee ISO/TC 213, Dimensional and geometrical product specifications and verification. BS EN ISO 22432:2011ISO 22432:2011(E) ISO 2011 All rights reserved vIntroduction This International Standard is a Geometrical Product Specifications (GPS) standard and is to be regarded as a global GPS sta
22、ndard (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 8015 apply to this docume
23、nt and the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this document, unless otherwise indicated. Geometrical features exist in three “worlds”: the world of nominal definition, where an ideal representation of the workpiece is defined by the designer;
24、the world of specification, where the designer has in mind several representations of the workpiece; the world of verification, where one (or more) representation(s) of a given workpiece is (are) identified in the application of measuring procedure(s). In the world of verification, mathematical oper
25、ations can be distinguished from physical operations. The physical operations are the operations based on physical procedures; they are generally mechanical, optical or electromagnetic. The mathematical operations are mathematical treatments of the sampling of the workpiece. This treatment is genera
26、lly achieved by computing or electronic treatment. It is important to understand the relationship between these three worlds. This International Standard defines standardized terminology for geometrical features principally in the world of specification and the world of verification, to be used in c
27、ommunication between each world. The features defined in this International Standard are well suited for the specification of rigid parts and assemblies, and may also be applied to non-rigid parts and assemblies by specifying allowable variation according to rigid solids. BS EN ISO 22432:2011BS EN I
28、SO 22432:2011INTERNATIONAL STANDARD ISO 22432:2011(E) ISO 2011 All rights reserved 1Geometrical product specifications (GPS) Features utilized in specification and verification 1 Scope This International Standard defines general terms and types of features for geometrical features of specifications
29、for workpieces. These definitions are based on concepts developed in ISO/TS 17450-1. This International Standard aims to serve as the “road map” mapping out the interrelationship between geometrical features, thus enabling future standardization for industry and software makers in a consistent manne
30、r. 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 document (including any amendments) applies. ISO 14660-1:1999, Geome
31、trical Product Specifications (GPS) Geometrical features Part 1: General terms and definitions ISO/TS 17450-1:2005, Geometrical product specifications (GPS) General concepts Part 1: Model for geometrical specification and verification ISO/TS 17450-2:2002, Geometrical product specifications (GPS) Gen
32、eral concepts Part 2: Basic tenets, specifications, operators and uncertainties 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 14660-1, ISO/TS 17450-1 and ISO/TS 17450-2 and the following apply. 3.1 surface model model representing the set of featur
33、es limiting the virtual or the real workpiece NOTE 1 All closed surfaces (see Figures 1 and A.1) are included. NOTE 2 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 e
34、ach workpiece. EXAMPLE Case of a hollow surface. BS EN ISO 22432:2011ISO 22432:2011(E) 2 ISO 2011 All rights reservedRepresentation of a real surface of the workpiece Representation of the real workpieceaRepresentation of nominal surface model Representation of skin model Representation of discrete
35、surface model Representation of sampled surface model aFor the purpose of this International Standard. NOTE It is impossible to predict the total geometry of the real workpiece due to its geometrical imperfections. In this International Standard, a real surface of the workpiece is illustrated in sol
36、id black. Figure 1 Example of real surface of the workpiece and its models 3.1.1 nominal surface model surface model of ideal geometry defined by the technical product documentation NOTE 1 A nominal surface model is an ideal feature (See Figure 1 and Table 1). NOTE 2 A nominal surface model is a con
37、tinuous surface composed of an infinite number of points. NOTE 3 Any feature on the nominal surface model (skin model) contains a continuous infinite number of points. 3.1.2 skin model surface model of non-ideal geometry NOTE 1 The skin model is a virtual model used to express the specification oper
38、ator and the verification operator considering a continuous surface (see Table 1 and ISO/TS 17450-1). NOTE 2 A skin model is a non-ideal feature (see Figure 1). NOTE 3 A skin model is a continuous surface consisting of an infinite number of points. NOTE 4 Any feature on the skin model contains a con
39、tinuous infinite number of points. BS EN ISO 22432:2011ISO 22432:2011(E) ISO 2011 All rights reserved 33.1.3 discrete surface model surface model obtained from the skin model by an extraction NOTE 1 In addition to the required points, the extraction implies an interpolation. NOTE 2 The discrete surf
40、ace model is used to express the specification operator and the verification operator considering a finite number of points (see Table 1). NOTE 3 A discrete surface model is a non-ideal feature (see Figure 1). 3.1.4 sampled surface model surface model obtained from the real workpiece model by a phys
41、ical extraction NOTE 1 In addition to the sampled points, the verification may imply an interpolation. NOTE 2 The sampled surface model is used in verification by coordinate metrology, not, for example, in verification by a gauge because gauging makes no measurement of points. In verification by a g
42、auge, the real surface of the workpiece is directly considered (see Table 1). NOTE 3 A sampled surface model is a non-ideal feature (see Figure 1). 3.2 geometrical feature point, line, surface, volume or a set of these previous items NOTE 1 The non-ideal surface model is a particular geometrical fea
43、ture, corresponding to the infinite set of points defining the interface between the workpiece and the surrounding. NOTE 2 A geometrical feature can be an ideal feature or a non-ideal feature, and can be considered as a single feature or a compound feature. 3.2.1 nominal feature geometrical feature
44、of ideal geometry defined in the technical product documentation by the product designer NOTE 1 See Figure B.1. NOTE 2 A nominal feature is defined by the technical product documentation. See Table 1. NOTE 3 A nominal feature can be finite or infinite; by default it is infinite. EXAMPLE A perfect cy
45、linder, defined in a drawing, is a nominal feature obeying a specific mathematical formula, which is defined in a coordinate system related to the situation feature, and for which dimensional parameters are associated. The situation feature of a cylinder is a line which is commonly called “its axis”
46、. Taking this line as an axis of a Cartesian coordinate system leads to writing x2 y2 D/2, D being a dimensional parameter. A cylinder is a feature of size, of which the size is its diameter D. 3.2.2 real feature geometrical feature corresponding to a part of the workpiece real surface 3.2.3 discret
47、e feature geometrical feature corresponding to a part of the discrete surface model 3.2.4 sampled feature geometrical feature corresponding to a part of the sampled surface model BS EN ISO 22432:2011ISO 22432:2011(E) 4 ISO 2011 All rights reserved3.2.5 ideal feature feature defined by a parameterize
48、d equation ISO/TS 17450-1:2005, definition 3.13 NOTE 1 The expression of the parameterized equation depends on the type of ideal feature and on the intrinsic characteristics. NOTE 2 By default, an ideal feature is infinite. To change its nature, it is appropriate to specify it by the term “restricte
49、d”, e.g. restricted ideal feature. NOTE 3 For a complex surface defined by a cloud of points and an interpolation method, the cloud of points is considered the parameter. NOTE 4 This definition is also contained in ISO/TS 17450-1:2005. It is envisaged that it will be deleted from ISO 17450-1:2011. 3.2.5.1 attribute of an ideal feature property intrinsically attached to an ideal feature NOTE 1 Four levels of attributes can be defined for an ideal feature: shape, dimensional parameters from which a size can be defined in
