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1、Reference number ISO 128-44:2001(E) ISO 2001 INTERNATIONAL STANDARD ISO 128-44 First edition 2001-04-15 Technical drawings General principles of presentation Part 44: Sections on mechanical engineering drawings Dessins techniques Principes gnraux de reprsentation Partie 44: Coupes et sections applic
2、ables aux dessins industriels ISO 128-44:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this 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 p
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5、al Secretariat at the address given below. ISO 2001 All rights reserved. Unless otherwise specified, no part of this publication 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
6、 the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 ? CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2001 All rights reserved -,-,- ISO 128-44:2001(E) ISO 2001
7、 All rights reservediii Foreword ISO (the International Organization for Standardization) is a worldwide 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
8、 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. ISO collaborates closely with the International Electrotechnical Commiss
9、ion (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an
10、International Standard requires 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 part of ISO 128 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
11、 International Standard ISO 128-44 was prepared by Technical Committee ISO/TC 10, Technical product documentation, Subcommittee SC 1, Basic conventions. This first edition of ISO 128-44 is based on ISO 128:1982, subclause 4.4 to 4.9 of which it cancels and replaces. ISO 128 consists of the following
12、 parts, under the general title Technical drawings General principles of presentation: ?Part 20: Basic convention for lines ?Part 21: Preparation of lines by CAD systems ?Part 22: Basic conventions and applications for leader lines and reference lines ?Part 23: Lines on construction drawings ?Part 2
13、4: Lines on mechanical engineering drawings ?Part 25: Lines on shipbuilding drawings ?Part 30: Basic conventions for views ?Part 34: Views on mechanical engineering drawings ?Part 40: Basic conventions for cuts and sections ?Part 44: Sections on mechanical engineering drawings ?Part 50: Basic conven
14、tions for representing areas on cuts and sections The following part is under preparation: ?Part 1: Introduction and index -,-,- INTERNATIONAL STANDARDISO 128-44:2001(E) ISO 2001 All rights reserved1 Technical drawings General principles of presentation Part 44: Sections on mechanical engineering dr
15、awings 1Scope This part of ISO 128 specifies general principles for presenting sections on mechanical engineering drawings following the orthographic projection methods specified in ISO 5456-2. For areas on sections, representation is according to ISO 128-501. Attention has also been given to the re
16、quirements of reproduction, including microcopying in accordance with ISO 6428. NOTEThe basic rules for cuts and sections are given in ISO 128-402. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of
17、ISO 128. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 128 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below
18、. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 128-20, Technical drawings General principles of presentation Part 20: Basic conventions for lines. ISO 128-24:1999, T
19、echnical drawings General principles of presentation Part 24: Lines on mechanical engineering drawings. ISO 128-40, Technical drawings General principles of presentation Part 40: Basic conventions for cuts and sections. ISO 5456-2, Technical drawings Projection methods Part 2: Orthographic represent
20、ations. ISO 6428, Technical drawings Requirements for microcopying. ISO 10209-1, Technical product documentation Vocabulary Part 1: Terms relating to technical drawings: general and types of drawings. ISO 10209-2, Technical product documentation Vocabulary Part 2: Terms relating to projection method
21、s. 3Terms and definitions For the purposes of this part of ISO 128, the terms and definitions given in ISO 10209-1 and ISO 10209-2 apply. -,-,- ISO 128-44:2001(E) 2 ISO 2001 All rights reserved 4General In principle, ribs, fasteners, shafts, spokes of wheels and the like are not cut in longitudinal
22、sections, and should therefore not be represented as sections. Like views, sections may be shown in a position other than that indicated by the arrows for the direction of their viewing. 5Cutting planes A section in one plane is shown in Figure 1 and Figure 2. Figure 1 Section in one plane -,-,- ISO
23、 128-44:2001(E) ISO 2001 All rights reserved3 Figure 2 Section in one plane A section in two parallel planes is shown in Figure 3. Figure 3 Section in two parallel planes -,-,- ISO 128-44:2001(E) 4 ISO 2001 All rights reserved A section in three contiguous planes is shown in Figure 4. Figure 4 Secti
24、on in three contiguous planes A section in two intersecting planes, one revolved into the plane of projection, is shown in Figure 5. Figure 5 Section in two intersecting planes -,-,- ISO 128-44:2001(E) ISO 2001 All rights reserved5 In the case of parts of a revolution containing regularly spaced det
25、ails required to be shown in sections but not situated in the cutting plane, these details may be depicted rotated into the cutting plane, provided that no ambiguity can arise (see Figure 6). No additional identification is needed. Figure 6 Section of part of revolution with regularly spaced details
26、 not in, but rotated into, the cutting plane When it is sometimes necessary to position the cutting plane partly outside the object, it is not, however, necessary to show the long-dashed dotted narrow line of type 04.1 specified in ISO 128-24:1999 (see Figure 7). Figure 7 Cutting plane positioned pa
27、rtly outside object -,-,- ISO 128-44:2001(E) 6 ISO 2001 All rights reserved 6Removed sections When sections are removed from a view, they shall be placed near that view and connected to it by the long- dashed dotted narrow line of type 04.1 specified in ISO 128-24:1999 (see Figure 8). Figure 8 Secti
28、on removed from a view 7Other sections For sections revolved in the relevant view, as well as for sections of symmetrical parts and local sections: according to ISO 128-40. 8Arrangement of successive sections Successive sections may be arranged in a manner similar to the examples shown in Figures 9
29、to 11, in as much as it is suitable for the layout and understanding of the drawing. Unless they contribute to the clarification of the drawing, outlines and edges behind the cutting plane may be omitted. Figure 9 Successive sections Example 1 -,-,- ISO 128-44:2001(E) ISO 2001 All rights reserved7 F
30、igure 10 Successive sections Example 2 Figure 11 Successive sections Example 3 -,-,- ISO 128-44:2001(E) 8 ISO 2001 All rights reserved Bibliography 1ISO 128-50, Technical drawings General principles of presentation Part 50: Basic conventions for representing areas on cuts and sections. -,-,- ISO 128-44:2001(E) ICS 01.100.20 Price based on 8 pages ISO 2001 All rights reserved -,-,-