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1、 Reference number ISO 15786:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 15786 First edition 2008-10-01 Technical drawings Simplified representation and dimensioning of holes Dessins techniques Reprsentation et cotation simplifies des trous Copyright International Organization for Standardization Pro
2、vided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 15786:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, t
3、his file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secre
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5、ure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publicati
6、on may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20
7、 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:3
8、3:57 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 15786:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Methods of representation and dimensioning of holes 2 4.1 Comp
9、lete representation and complete dimensioning of holes 2 4.2 Complete representation and simplified dimensioning of holes. 2 4.3 Simplified representation and simplified dimensioning of holes 2 4.4 Representation of holes on the same drawing 2 5 Structure of dimensioning of holes 3 5.1 Structure and
10、 sequence of descriptive elements for simplified dimensioning of holes 3 5.2 Graphical symbols 4 5.3 Number of groups of holes and number of holes in a group. 6 5.4 Indication of tolerances 7 5.5 Hole bottom. 7 5.6 Countersinks and chamfers 7 5.7 Depth dimensions. 8 5.8 Indication of surface texture
11、 10 5.9 Indication of dimensions on geometrical tolerances 12 Annex A (informative) Examples for representation and dimensioning of holes, counterbores and internal threads. 13 Bibliography. 18 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=B
12、oeing Co/5910770001 Not for Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 15786:2008(E) iv ISO 2008 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
13、 (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 committee. International organizations,
14、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 accordance with the rules given in the ISO/
15、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 requires approval by at least 75 % of the me
16、mber 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 15786 was prepared by Technical Committee ISO/TC 10, Technical produc
17、t documentation, Subcommittee SC 6, Mechanical engineering documentation. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking permitted without license from
18、IHS -,-,- ISO 15786:2008(E) ISO 2008 All rights reserved v Introduction This International Standard has been established to specify the simplified representation and dimensioning of holes. The rules established by this International Standard determine, unambiguously, methods for the representation b
19、oth complete and simplified and the dimensioning of holes, as well as the structure and sequence of the descriptive elements for the simplified representation of holes. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not f
20、or Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking
21、permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 15786:2008(E) ISO 2008 All rights reserved 1 Technical drawings Simplified representation and dimensioning of holes 1 Scope This International Standard specifies rules for the simplified representation, dimensioning and tolerancing
22、of holes, counterbores, internal threads and chamfers on drawings. Where there could be misinterpretation using simplified representation, the complete representation and dimensioning by cuts, sections or elements on a larger scale apply, according to ISO 128-30, ISO 128-34, ISO 128-40, ISO 128-44,
23、ISO 128-50, ISO 129-1 and ISO 406. 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)
24、applies. ISO 128-22, Technical drawings General principles of presentation Part 22: Basic conventions and applications for leader lines and reference lines ISO 128-30, Technical drawings General principles of presentation Part 30: Basic conventions for views ISO 128-34, Technical drawings General pr
25、inciples of presentation Part 34: Views on mechanical engineering drawings ISO 128-40, Technical drawings General principles of presentation Part 40: Basic conventions for cuts and sections ISO 128-44, Technical drawings General principles of presentation Part 44: Sections on mechanical engineering
26、drawings ISO 128-50, Technical drawings General principles of presentation Part 50: Basic conventions for representing areas on cuts and sections ISO 129-1, Technical drawings Indication of dimensions and tolerances Part 1: General principles ISO 406, Technical drawings Tolerancing of linear and ang
27、ular dimensions ISO 1101, Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-out ISO 1302, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation ISO 5458, Geometrical Product Specifica
28、tions (GPS) Geometrical tolerancing Positional tolerancing ISO 6410-3:1993, Technical drawings Screw threads and threaded parts Part 3: Simplified representation Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resa
29、le, 01/29/2009 22:33:57 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 15786:2008(E) 2 ISO 2008 All rights reserved 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 complete representation of holes representation
30、 of holes in accordance with generally valid rules and projection methods for technical drawings 3.2 simplified representation of holes representation of holes, drawn either true to scale or not, with a symbolic representation of the features 3.3 complete dimensioning of holes dimensioning of holes
31、using dimension lines and extension lines 3.4 simplified dimensioning of holes dimensioning of holes using leader lines and reference lines 4 Methods of representation and dimensioning of holes 4.1 Complete representation and complete dimensioning of holes The complete representation and dimensionin
32、g of holes according to ISO 128-30, ISO 128-34, ISO 128-40, ISO 128-44, ISO 128-50 and ISO 129-1 applies in all cases where a simplified representation of holes and dimensioning could lead to misinterpretation of the drawing (see Table 1). 4.2 Complete representation and simplified dimensioning of h
33、oles Representation and dimensioning of holes in the sections is preferred. For dimensioning in the sections, the leader line is directed towards the point of intersections of the visible edge of the part and the centre line of the hole, ending with an arrowhead on the centre line of the hole. For d
34、imensioning in the view from above, the leader line is directed towards the centre of the hole, ending with an arrowhead on the outline of the hole (see Table 1). For rules relative to the use of leader lines and reference lines, see ISO 128-22. 4.3 Simplified representation and simplified dimension
35、ing of holes For simplified representation and simplified dimensioning of holes, only the centre lines of the holes are shown. In the case of the view from above, the location of the centre of the hole is represented by a cross using continuous wide lines (according to ISO 128-24:1999, type 01.2). T
36、he location of holes represented parallel to the plane of projection is shown by a long-dashed dotted narrow line (according to ISO 128-24:1999, type 04.1). In the case of simplified dimensioning, the leader line ends with an arrowhead at the centre of the hole or at the point of intersection of the
37、 visible edge of the part and the centre line of the hole. The arrowhead points to the surface of the part from which the features are indicated (direction of manufacture; exception, see 5.3) (see Table 1). 4.4 Representation of holes on the same drawing It is suggested that holes should be drawn an
38、d represented using only one of the methods of Table 1 to avoid causing confusion on the same drawing. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking pe
39、rmitted without license from IHS -,-,- ISO 15786:2008(E) ISO 2008 All rights reserved 3 Table 1 Comparison of methods for representation and dimensioning of holes Complete representation and complete dimensioning according to ISO 129-1 Complete representation and simplified dimensioning Simplified r
40、epresentation and simplified dimensioning 5 Structure of dimensioning of holes 5.1 Structure and sequence of descriptive elements for simplified dimensioning of holes The structure of the simplified dimensioning of holes is composed of continuous enumeration and denominations of features used. This
41、means that the graphical symbols (e.g. ) and the dimensions (e.g. diameter, hole depths, tolerances) are shown one below the other. The feature with the largest dimension shall be shown in the first line. The data shall be marked in characters of the same size, with the exception of the indication o
42、f surface texture (see 5.8). The necessary data for each feature, several identical features or several groups of identical features are indicated on one line of the simplified dimensioning. Structure and sequence of data is explained in Figure 1. Copyright International Organization for Standardiza
43、tion Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 15786:2008(E) 4 ISO 2008 All rights reserved Figure 1 Structure and sequence of descriptive elements Figure 2 In
44、dication on a drawing 5.2 Graphical symbols See Table 2. Table 2 Symbols No. Symbol Term Example Figure 1 Diameter (ISO 129-1) 10 4, 5, 6, 7, 8 2 Square (ISO 129-1) 20 Table A.1, No. 6 3 Sign between nominal size and depth or angle dimensions, number of features and of groups of features M10 25 4, 5
45、, 7, 8, 14 4 / Sign between depth dimensions or between number of groups and number of features, e.g. thread length and bottom hole depth M10 25/30 9, 12 5 U Cylindrical counterbore, flat hole bottom 10 25U 3, 4 6 V Material-dependent bit (point angle of hole bottom) 10 25V 6 7 W Indexable insert bi
46、t (hole bottom) 10 25W 5 8 Y Dimension indicated up to bit 10 28Y 8 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:33:57 MSTNo reproduction or networking permitted without license from IHS -,
47、-,- ISO 15786:2008(E) ISO 2008 All rights reserved 5 a) Complete representation and complete dimensioning b) Complete representation and simplified dimensioning c) Simplified representation and simplified dimensioning Figure 3 Hole with counterbore a) Complete representation and complete dimensionin
48、g b) Complete representation and simplified dimensioning c) Simplified representation and simplified dimensioning Figure 4 Hole with flat hole bottom a) Complete representation and complete dimensioning b) Complete representation and simplified dimensioning c) Simplified representation and simplified dimensio