1、BS ISO 13715:2017Technical productdocumentation Edges ofundefined shape Indicationand dimensioningBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 13715:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 13715:2017.It su
2、persedes BS ISO 13715:2000 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical Product Realization.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to inclu
3、de all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 84295 5 ICS 01.040.01; 01.100.20 Compliance with a British Standard cannot confer immunity from legal obligat
4、ions.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 13715:2017 ISO 2017Technical product documentation Edges of undefined shape Indication and dim
5、ensioningDocumentation technique de produits Artes de forme non dfinie Indication et cotationINTERNATIONAL STANDARDISO13715Third edition2017-03Reference numberISO 13715:2017(E)BS ISO 13715:2017ISO 13715:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in Switzer
6、landAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be reque
7、sted from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 13715:2017ISO 13715:2017(E)Foreword ivIntroductio
8、n v1 Scope . 12 Normative references 13 Terms and definitions . 14 Indications on drawings . 44.1 Basic indication 44.2 Types of undefined edge . 54.3 Size 54.4 Direction of passing or undercut . 74.4.1 Indication in one direction 74.4.2 Asymmetrical indication . 84.5 Location of the basic symbol .
9、84.5.1 General 84.5.2 Individual indication of edges 94.5.3 Indication of limited areas 104.5.4 General indication of edges . 114.5.5 Exceptions from general indications of edges .134.6 Reference to this document 15Annex A (normative) Proportions and dimensions of graphical symbols .16Annex B (infor
10、mative) Examples of indication of undefined edges 18Bibliography .22 ISO 2017 All rights reserved iiiContents PageBS ISO 13715:2017ISO 13715:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
11、 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 committee. International organizations, governmental and non-governmental
12、, 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.The procedures used to develop this document and those intended for its further maintenance are described in the ISO
13、/IEC Directives, Part 1. In particular the different 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 possibi
14、lity 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of p
15、atent declarations received (see www .iso .org/ patents).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 voluntary nature of standards, the meaning of ISO specific terms and expressions related to
16、 conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 10, Technical product docum
17、entation, Subcommittee SC 6, Mechanical engineering documentation.This third edition cancels and replaces the second edition (ISO 13715:2000), which has been technically revised with the following changes: title changed from Technical drawings Edges of undefined shape Vocabulary and indications to T
18、echnical product documentation Edges of undefined shape Indication and dimensioning ; Normative references updated; text rearranged in Clause 4; figure titles changed; figures added and improved; 4.4.2 “Asymmetrical indications” added; Clause 5 deleted and Table 2 “Examples” is moved to Annex B, exp
19、lanations have been improved; Annex B “Recommended edge sixe” has been deleted, definition of sharp edge is deleted.iv ISO 2017 All rights reservedBS ISO 13715:2017ISO 13715:2017(E)IntroductionIn technical drawings, the ideal geometric shape is represented without any deviation and, in general, with
20、out consideration of the conditions of the edges. Nevertheless, for many purposes (the functioning of a part or out of safety considerations, for example) particular conditions of edges need to be indicated. Such conditions include those of external edges free from burr or those with a burr of limit
21、ed size, and internal edges with a passing.This document provides a symbology for the indication of the desired edge. ISO 2017 All rights reserved vBS ISO 13715:2017BS ISO 13715:2017Technical product documentation Edges of undefined shape Indication and dimensioning1 ScopeThis document specifies rul
22、es for the indication and dimensioning of undefined edges in technical product and dimensions. The proportions and dimensions of the graphical symbols to be used are also specified.In cases where the geometrically defined shape of an edge (for example, 1 45) is required, the general dimensioning pri
23、nciples given in ISO 129-1 apply.2 Normative referencesThere are no normative references cited in this document.3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the followin
24、g addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1edge of undefined shapetransition line, included in an intersection plane, which is not defined on the nominal model and which exists between two
25、adjacent integral surfaces3.2undercutdeviation inside the ideal geometrical shape of an edge defined by two tangent outside straight lines to the adjacent feature of the zone of the undefined edgeNote 1 to entry: The explanation of the definition is given in Figures 1 and 3. In order to simplify the
26、 illustration, only the undercut and the two tangents outside straight lines are represented.Note 2 to entry: Examples are presented in Figures 2 and 4.3.3passingdeviation outside the ideal geometrical shape of an edge defined by two tangent outside straight lines to the adjacent feature of the zone
27、 of the undefined edgeNote 1 to entry: The explanation of the definition is given in Figures 5 and 7. In order to simplify the illustration, only the passing and the two tangents outside straight lines are represented.Note 2 to entry: A burr or a flash (see Figure 5) can be considered to be a specia
28、l case of external passing.Note 3 to entry: Examples are presented in Figures 6 and 8.INTERNATIONAL STANDARD ISO 13715:2017(E) ISO 2017 All rights reserved 1BS ISO 13715:2017ISO 13715:2017(E)Key1 ideal sharp edge2 undercutFigure 1 Undercut on an external edgeFigure 2 Examples of undercut on an exter
29、nal edgeKey1 ideal sharp edge2 undercutFigure 3 Undercut on an internal edgeFigure 4 Examples of undercut on an internal edge2 ISO 2017 All rights reservedBS ISO 13715:2017ISO 13715:2017(E)Key1 ideal sharp edge2 passingFigure 5 Passing on an external edge (flash or burr)Figure 6 Examples of passing
30、on external edge (burr or flash) ISO 2017 All rights reserved 3BS ISO 13715:2017ISO 13715:2017(E)Key1 ideal sharp edge2 passingFigure 7 Passing on an internal edgeFigure 8 Examples of passing on an internal edge4 Indications on drawings4.1 Basic indicationThe requirements for an edge of a part shall
31、 be indicated by the basic graphical indication shown in Figure 9. If all edges of a part are to be specified as undefined, the basic general indication is used (see Figure 10).The graphical symbol and the specification shall be represented in such a way that they can be read from the bottom of the
32、drawing.The proportions of this symbol are given in Annex A. Additional indications can be placed in the areas a1, a2or a3, see Figure A.1.Undefined edges cannot be described by the basic element alone. As a minimum indication, the type of undefined edge shall be specified.Figure 9 Basic indication4
33、 ISO 2017 All rights reservedBS ISO 13715:2017ISO 13715:2017(E)Figure 10 Basic general indication4.2 Types of undefined edgeThe type of an undefined edge shall be indicated in the area a1(see Figure A.1), inside the basic symbol. The symbol element + (plus), - (minus) or (plus or minus) is used in a
34、ccordance with Table 1.The symbol element + (plus) indicates permitted excess material, i.e. passing.The symbol element (minus) indicates required material removal, i.e. undercut.The symbol element (plus or minus) indicates permitted excess material or material removed, i.e. an undercut or a passing
35、. This can only be used with an indication of size (see 4.3).The deviation from ideal nominal shape can be controlled by indicating the size of passing and undercut (see 4.3) and the direction (see 4.4).Table 1 Symbols for the shapes of edgesSymbol MeaningExternal edge Internal edgePassing Undercut
36、Passing UndercutPermitted Not permitted Permitted Not permittedNot permitted Required Not permitted RequiredPermitted Permitted Permitted PermittedCan only be used with an indication of size.4.3 SizeThe maximum deviation of the undercut or passing shall be controlled by indication of the dimensions
37、(size). The value is placed after the symbol element +, - or in the area a1(see Figure A.1).When a single limit for the size of an edge is specified with a positive value, the second limit deviation is the value zero; undercut is not permitted (see Figures 11 and 12).When a single limit for the size
38、 of an edge is specified with a negative value, the second limit deviation is the value zero; passing is not permitted (see Figures 11 and 12).Whenever the specification of an upper and lower limit deviation for the size of an edge is necessary, both values shall be indicated. The upper limit deviat
39、ion is placed above the lower limit deviation (see Figure 13). The indicated limit deviations correspond to the maximum and minimum dimensions, respectively. ISO 2017 All rights reserved 5BS ISO 13715:2017ISO 13715:2017(E)When a particular direction of passing or undercut is required, the indication
40、 shall be positioned accordingly (see 4.4).NOTE The thickness of passing on external edges and the thickness of undercuts on internal edges cannot be specified according to this document.Figure 11 Size of an external edgesFigure 12 Size of internal edges6 ISO 2017 All rights reservedBS ISO 13715:201
41、7ISO 13715:2017(E)Figure 13 Examples of indications of size4.4 Direction of passing or undercut4.4.1 Indication in one directionWherever indication of one direction of passing on an external edge or undercut on an internal edge is needed, the indication of size shall be given in the area a2or a3(see
42、 Figure A.1), accordingly (see Figures 14, 15 and 16).Indication in one direction cannot be used for undercut on external edges and passing on internal edges.For angles other than 90, the direction cannot be specified.Figure 14 Direction of the passing on an external edgeFigure 15 Direction of the u
43、ndercut on an internal edgeFigure 16 Examples of indications of direction ISO 2017 All rights reserved 7BS ISO 13715:2017ISO 13715:2017(E)4.4.2 Asymmetrical indicationWherever asymmetrical indication of directions of undercut on an external edge or passing on an internal edge is needed, the indicati
44、on of size shall be given in the area a2and a3(see Figure A.1), accordingly (see Figures 17, 18 and 19).Asymmetrical indications cannot be used for passing on external edges and undercut on internal edges.For angles other than 90, the direction cannot be specified.Figure 17 Direction of undercut on
45、an external edgeFigure 18 Direction of the passing on an internal edgeFigure 19 Examples of asymmetrical indications of direction4.5 Location of the basic symbol4.5.1 GeneralEdges of undefined shape shall be indicated by an individual indication for a single edge or for all edges around the represen
46、ted profile of a part, limited areas of the edges of the represented profile of a part, and general indications to not specified edges of a part.Individual indications shall be assigned to a line (e.g. visible outlines, areas with specific treatment or extension lines), or to a point representing an
47、 edge parallel with, or vertical to, the projection plane (see Figures 20, 21 and 22).8 ISO 2017 All rights reservedBS ISO 13715:2017ISO 13715:2017(E)General indications shall be indicated only once for all the edges and shall be located near the title block or in a notes area (see Figures 25 to 29
48、and Annex B).4.5.2 Individual indication of edgesThe following features maybe indicated: edges vertical to the projection plane (see Figure 20, front view); edges of a feature, such as a hole (see Figure 20, section); edges of the front and the back, if only one view is represented and the outlines
49、of both front and back are the same (see Figure 21). If other edges exist between front and back they will be included, unless otherwise specified. Specify the quantity of edges if there is any doubt (see Figure 22) or make it clear in a separate view. all edges around the profile of a part represented on the drawing, if the symbol “all around” is added to the basic symbol (see Figures 21 and 22). The “all around” symbol shall not be used in sect
