1、BSI Standards PublicationBS EN ISO 2538-2:2014Geometrical productspecifications (GPS) WedgesPart 2: Dimensioning and tolerancing (ISO2538-2:2014)BS EN ISO 2538-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO2538-2:2014. Together with BS EN ISO 2538-1:
2、2014 it supersedes BS EN ISO 2538:2003, which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TDW/4, Technical Product Realization.A list of organizations represented on this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 purpo
3、rt to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 75464 7ICS 17.040.01Compliance with a British Standard cannot confer immunity fromlegal obligations.
4、This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2014.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2538-2 September 2014 ICS 17.040.01 Supersedes EN ISO 2538:2003Engl
5、ish Version Geometrical product specifications (GPS) - Wedges - Part 2: Dimensioning and tolerancing (ISO 2538-2:2014) Spcification gomtrique des produits (GPS) - Coins - Partie 2: Cotation et tolrancement (ISO 2538-2:2014) Geometrische Produktspezifikation (GPS) - Keile - Teil 2: Bemaung und Toleri
6、erung (ISO 2538-2:2014) This European Standard was approved by CEN on 9 August 2014. 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 a
7、nd bibliographical 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
8、 responsibility 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 Yugosl
9、av Republic 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 D
10、E NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2538-2:2014 EBS EN ISO 2538-2:2014EN ISO 2538-2:2014 (E) 3 For
11、eword This document (EN ISO 2538-2:2014) 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 secretariat
12、 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 March 2015, and conflicting national standards shall be withdrawn at the latest by March 2015. Attention is drawn to the
13、 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 EN ISO 2538:2003. According to the CEN-CENELEC Internal Regulations, the national stan
14、dards organizations of the following 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, L
15、uxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 2538-2:2014 has been approved by CEN as EN ISO 2538-2:2014 without any modification. BS EN ISO 2538-2:2014ISO 2538-2:201
16、4(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Dimensioning of wedges. 14.1 Characteristics of wedges 14.2 Dimensioning of wedges. 24.3 Standardized series of wedges 35 Tolerancing of wedges 4Annex A (informa
17、tive) Relation to the GPS matrix model .10Bibliography .12BS EN ISO 2538-2:2014ISO 2538-2:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carr
18、ied 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 ISO, also take part in the work.
19、ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the differen
20、t approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be
21、 the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).
22、Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in
23、 the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/213, Dimensional and geometrical product specifications and verification.This first edition of ISO 2538-2, together with ISO 2538-1, cancels and replac
24、es (ISO 2538:1998), which has been technically revised.ISO 2538 consists of the following parts, under the general title Geometrical product specifications (GPS) Wedges : Part 1: Series of angles and slopes Part 2: Dimensioning and tolerancingiv ISO 2014 All rights reservedBS EN ISO 2538-2:2014ISO 2
25、538-2:2014(E)IntroductionThis part of ISO 2538 is a geometrical product specification (GPS) standard and is to be regarded as a general GPS standard (see ISO/TR 14638). It influences chain links1, 2 and 3 of the chain of standards on angle.The ISO/GPS Masterplan given in ISO/TR 14638 gives an overvi
26、ew 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 otherwise indicated.For more detailed informa
27、tion on the relation of this part of ISO 2538 to other standards and to the GPS matrix model, see Annex A.In this part of ISO 2538, the figures illustrate the text only and should not be considered as design examples. For this reason, the figures are simplified and are not to scale. ISO 2014 All rig
28、hts reserved vBS EN ISO 2538-2:2014BS EN ISO 2538-2:2014Geometrical product specifications (GPS) Wedges Part 2: Dimensioning and tolerancing1 ScopeThis part of ISO 2538 specifies methods for the dimensioning and tolerancing of wedges.NOTE For simplicity, only truncated wedges have been represented i
29、n this part of ISO 2538; however, this document can be applied to any type of wedge.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For und
30、ated references, the latest edition of the referenced document (including any amendments) applies.ISO 2538-1:2014, Geometrical product specification (GPS) Wedges Part 1: Series of angles and slopes3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 2538-1
31、 apply.4 Dimensioning of wedges4.1 Characteristics of wedgesIn order to define a wedge, the characteristics and dimensions shown in Table 1 may be used in those combinations most appropriate for the function of the wedge.INTERNATIONAL STANDARD ISO 2538-2:2014(E) ISO 2014 All rights reserved 1BS EN I
32、SO 2538-2:2014ISO 2538-2:2014(E)Table 1 Characteristics and dimensions of wedgesCharacteristics and dimensionsLettersymbolExamples of indicationPreferred methodOptional methodCharacteristicsrate of wedge C 1:2,835 641 slope angle 20 slope S 1:2,747 477 36,4 %Dimensionsheight of wedge at the larger e
33、nd Hheight of wedge at the smaller end hheight of wedge at the selected cross-section Hxthickness of wedge at the larger end Tthickness of wedge at the smaller end tthickness of wedge at the selected cross-section Txlength of wedge Llength locating a cross-section at which Hx or Tx is specifiedLx4.2
34、 Dimensioning of wedgesNo more dimensions than are necessary shall be specified. However, additional dimensions may be given as auxiliary dimensions in brackets for information (see Figure 2).Typical combinations of wedge characteristics and dimensions are shown in Figures 1 to 4.hHLFigure 1 Dimensi
35、oning of wedge; heights of wedge specifiedLh()HFigure 2 Dimensioning of wedge; one height of wedge and wedge angle specified2 ISO 2014 All rights reservedBS EN ISO 2538-2:2014ISO 2538-2:2014(E)LtTFigure 3 Dimensioning of wedge; thicknesses of wedge specifiedLxCCLTTxFigure 4 Dimensioning of wedge; on
36、e thickness of wedge and rate of wedge specified4.3 Standardized series of wedgesThe preferred choice of wedge angle shall be from the standardized series of wedge angles specified in ISO 2538-1. ISO 2014 All rights reserved 3BS EN ISO 2538-2:2014ISO 2538-2:2014(E)5 Tolerancing of wedgesWedges can b
37、e toleranced (both size and sloped feature) in accordance with the methods given in Figures 5 to 10.The letter symbol t is used to define the width of the tolerance zone.NOTE 1 Alternative methods of tolerancing using only dimensional specifications do not give adequate indication with regard to the
38、 shape of the surface. Consequently, when alternative methods are used geometrical specifications according to ISO 1101 have to be added if required for functional reasons (see ISO 14405-2).NOTE 2 Generally, in this standard, to express a geometrical specification of location, the characteristic sym
39、bol of position is used. The characteristic symbol for profile of any surface can also be used with the same meaning. The position characteristic symbol immediately gives the information that the toleranced feature is a flat surface. The profile of any surface characteristic symbol does not immediat
40、ely give the information that the toleranced feature is a flat surface, it is necessary to analyse the indications of the whole drawing or query the CAD model of the part.t A BABh1234t/2hta) Specification b) InterpretationKey1 tolerance zone2 extracted surface3 plane associated with the extracted “p
41、lanar” surface, corresponding to the datum A4 plane associated with the extracted “planar” surface, corresponding to the datum B with a perpendicularity constraint from datum AThe tolerance zone is limited by two parallel planes, each having a wedge angle and located a distance t apart.The wedge ang
42、le of the zone corresponds to the wedge angle and located at the height h at associated datum plane B. The extracted surface of the wedge is required to be within this zone.Figure 5 Examples of geometrical specification on a wedge4 ISO 2014 All rights reservedBS EN ISO 2538-2:2014ISO 2538-2:2014(E)B
43、B2 BCZt1221t/2ta) Specification b) InterpretationKey1 tolerance zone2 extracted surfaceThe two tolerance zones are limited by two parallel planes located a distance t apart on each side of the wedge. The plane pairs have a wedge angle between them. The extracted surfaces of the wedge are required to
44、 be within these zones.Figure 6 Location of the sides of a wedge without datum ISO 2014 All rights reserved 5BS EN ISO 2538-2:2014ISO 2538-2:2014(E)BB2 Bt ACZALxHx1221Lx34t/2Hxta) Specification b) InterpretationKey1 tolerance zone2 extracted surface3 plane associated with the extracted “planar” surf
45、ace, corresponding to the datum A4 constructed plane at the distance Lx from the associated plane (datum A)The two tolerance zones are limited by two parallel planes located a distance t apart on each side of the wedge. The plane pairs have a wedge angle between them. The lower planes are perpendicu
46、lar to datum A and the intersection lines of the planes are parallel to datum A. The height Hx applies at the distance Lx from datum A. The extracted surfaces of the wedge are required to be within these zones.Figure 7 Wedge located (and orientated) from a datum6 ISO 2014 All rights reservedBS EN IS
47、O 2538-2:2014ISO 2538-2:2014(E)BB2 BCZ AtA12213t/2ta) Specification b) InterpretationKey1 tolerance zone2 extracted surface3 plane associated with the extracted “planar” surface, corresponding to the datum AThe two tolerance zones are limited by two parallel planes located a distance t apart on each
48、 side of the wedge. The plane pairs have a wedge angle between them. The lower planes are perpendicular to datum A and the intersection lines of the planes are parallel to datum A. The extracted surfaces of the wedge are required to be within these zones.The CZ modifier locks the two tolerance zones
49、 together. Without the CZ modifier, the two tolerance zones can rotate relative to each other, such that the orientation of the tolerance zone for the upper surface is perpendicular to the drawing plane and the orientation of the tolerance zone for the lower surface is not perpendicular to the drawing plane.Figure 8 Wedge orientated from a datum ISO 2014 All rights reserved 7BS EN ISO 2538-2:2014ISO 2538-2:2014(E)BB2 BACZtAH11 2223Ht/2/2ta) Specification b) InterpretationKey1 tolerance zone2
