BS EN ISO 25378-2011 Geometrical product specifications (GPS) Characteristics and conditions Definitions《产品几何量技术规范(GPS) 特性和条件 定义》.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 25378:2011Geometrical productspecifications (GPS) Characteristics and conditions DefinitionsBS EN ISO 25378:2011 BRITISH STANDARDNational forewordThis British Standard
2、is the UK implementation of EN ISO25378:2011.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 not purport to include
3、all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 57494 8ICS 17.040.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and S
4、trategy Committee on 31 May 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 25378 April 2011 ICS 17.040.01 English Version Geometrical product specifications (GPS) - Characteristics and conditions - Definitions (ISO 25378:2011) Spcif
5、ication gomtrique des produits - Caractristiques et conditions - Dfinitions (ISO 25378:2011) Geometrische Produktspezifikation (GPS) - Merkmale und Bedingungen - Begriffe (ISO 25378:2011) This European Standard was approved by CEN on 7 August 2010. CEN members are bound to comply with the CEN/CENELE
6、C 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 on application to the CEN-CENELEC Management Centre or
7、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-CENELEC Management Centre has the same status as the offic
8、ial 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, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slov
9、akia, 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 exploitation in any form and by any means reserved worldwide
10、 for CEN national Members. Ref. No. EN ISO 25378:2011: EBS EN ISO 25378:2011EN ISO 25378:2011 (E) 3 Foreword This document (EN ISO 25378:2011) has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification“ in collaboration with Technical Com
11、mittee 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 identical text or by endorsement, at the latest by October 2011, and
12、conflicting national standards shall be withdrawn at the latest by October 2011. 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. Accor
13、ding 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, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Ita
14、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 25378:2011 has been approved by CEN as a EN ISO 25378:2011 without any modification. BS EN ISO 25378:201
15、1ISO 25378:2011(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 standard (see ISO/TR 14638). It influences all chain links of all chains of standards in the general GPS matrix. To f
16、acilitate the reading and the understanding of this International Standard, it is essential to refer to ISO 17450-1 and ISO/TS 17450-2. Geometrical characteristics exist in three “worlds”: the world of nominal geometrical definition, where an ideal representation of the future workpiece is defined b
17、y the designer; the world of specification, where several representations of the future workpiece are imagined by the designer; the world of verification, where one or several representations of a given workpiece are identified in the application of measuring procedure(s). A GPS specification define
18、s requirements through a geometrical characteristic and condition. In the world of verification, mathematical operations can be distinguished from physical operations. The physical operations are the operations based on physical procedures; they are generally mechanical, optical or electromagnetic.
19、The mathematical operations are mathematical treatments of the sampling of the workpiece. This treatment is generally achieved by computing or electronic treatment. It is important to understand the relationship between these three worlds. These specifications, characteristics and conditions, generi
20、cally defined in this International Standard, are well suited to define requirements of rigid parts and assemblies and can also be applied to non-rigid parts and assemblies. BS EN ISO 25378:2011BS EN ISO 25378:2011INTERNATIONAL STANDARD ISO 25378:2011(E) ISO 2011 All rights reserved 1Geometrical pro
21、duct specifications (GPS) Characteristics and conditions Definitions 1 Scope This International Standard defines general terms for geometrical specifications, characteristics and conditions. These definitions are based on concepts developed in ISO 17450-1 and ISO 22432 and they are given by using a
22、mathematical description based on Annex B of ISO 17450-1:2011. This International Standard is not intended for industrial use as such among designers, but is aimed to serve as the “road map” mapping out the requirements based on geometrical features, thus enabling future standardization for industry
23、 and software makers in a consistent manner. This International Standard defines general types of geometrical characteristics and conditions which can be used in GPS. These descriptions are applicable to a workpiece, an assembly, a population of workpieces, and a population of assemblies. These defi
24、nitions are based on concepts of operators and the duality principle contained in ISO 17450-1 and ISO/TS 17450-2 and on the description of types of geometrical features defined in ISO 22432. Conceptually, these specification operators can be used as specification operators or as verification operato
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