1、DEUTSCHE NORM December 199 Technical drawings - General principles of presentation Part 24: Lines on mechanical engineering drawings (IS0 128-24 : 1999) DIN - IS0 128-24 ICs 01.100.01 Supersedes DIN 15-2, June 1984 edition. Technische Zeichnungen -Allgemeine Grundlagen der Darstellung - Teil 24: Lin
2、ien in Zeichnungen der mechanischen Technik (IS0 128-24 : 1999) This standard incorporates International Standard IS0 128-24 Technical drawings - General principles of presentation - Part 24: Lines on mechanical engineering drawings. A comma is used as the decimal marker. National foreword This stan
3、dard has been prepared by ISO/TC 10. The responsible German body involved in its preparation was the Normenausschu Technische Grundlagen (Fundamentals in Technology Standards Committee). The DIN Standards corresponding to the International Standards referred to in clause 2 of the IS0 Standard are as
4、 follows: IS0 Standard DIN Standard(s) IS0 128-20 DIN IS0 128-20 IS0 128-22 DIN IS0 128-22 IS0 128-30 DIN 6-1 IS0 128-40 DIN 6-2 IS0 128-50 DIN 201 IS0 129 IS0 2203 DIN IS0 2203 IS0 3040 DIN IS0 3040 IS0 5261 DIN IS0 5261 IS0 6428 DIN IS0 6428 IS0 10578 DIN IS0 10578 DIN 406-1 O and DIN 406-1 1 IS0
5、641 0-1 DIN IS0 641 0-1 Amendments DIN 15-2, June 1984 edition, has been superseded by the specifications of DIN IS0 128-24. Previous editions DIN 15: 1919-07, 1921-08; DIN 15-1: 1955-06, 1964-03, 1967-12; DIN 15-2: 1955-06, 1964-03, 1968-06, 1984-06. Continued overleaf. IS0 Standard comprises 14 pa
6、ges. I Q No pari of this standard may be reproduced without the prior permission of Ref. No. DIN IS0 128-24 : 1999- Beuth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). 04.00 Page 2 DIN IS0 128-24: 1999-12 National Annex NA Standards referred to (and
7、not included in Normative references) DIN 6-1 DIN 6-2 DIN 201 DIN 406-1 O DIN 406-1 1 DIN IS0 128-20 DIN IS0 128-22 DIN IS0 5261 DIN IS0 6428 Technical drawings - Representation in normal projection - Views and special represen- tations Technical drawings - Representation in normal projection -Secti
8、onal views Technical drawings - Hatching to indicate sections Engineering drawing practice - Dimensioning - Concepts and general principles Engineering drawing practice - Dimensioning - Principles of application Technical drawings - General principles of presentation - Part 20: Basic conventions for
9、 lines (IS0 128-20 : 1996) Technical drawings - General principles of presentation - Part 22: Basic conventions and applications for leader lines and reference lines (IS0 128-22 : 1999) Technical drawings - Simplified representation of bars and profile sections (IS0 5261 : 1995) Technical drawings -
10、 Requirements for microcopying (IS0 6428 : 1982) Page 1 IS0 128-24 : 1999 Technical drawings - General principles of presentation Part 24: Lines on mechanical engineering drawings Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies
11、 (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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 organziations,
12、governmental and non-governmental, in liaison with ISO, also take pari in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) in all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISOA
13、EC Directives, Part 3. 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 member bodies casting a vote. International Standard IS0 128-24 was prepared by T
14、echnical Committee ISOTC 1 O, Technical drawings, product definition and related documentation, Subcommittee SC 1, Basic conventions. IS0 128 consists of the following parts, under the general title Technical drawings - General principles of presentation: - Part 20: Basic conventions for lines - Par
15、t 21: Preparation of lines by CAD systems - Part 22: Basic conventions and applications for leader lines and reference lines - Pari 23: Lines on construction drawings - Part 24: Lines on mechanical engineering drawings - Part 25: Lines on shipbuilding drawings - Part 30: Basic conventions for views
16、- Part 31: Additional conventions for views - Part 40: Basic conventions for cuts and sections - Part 41: Cuts and sections for mechanical engineering drawings - Part 50: Basic conventions for representing areas on cuts and sections - Part 60: Additional conventions for cuts and sections Annex A of
17、this part of IS0 128 is for information only. Page 2 IS0 128-24 : 1999 1 Scope This part of IS0 128 specifies general rules and basic conventions for the types of lines on mechanical engineering drawings. 2 Normative references The following normative documents contain provisions which, through refe
18、rence in this text, constitute provisions of this part of IS0 128. For dated references, subsequent amendments to, or revisions of, these publications do not apply. However, parties to agreements based on this part of IS0 128 are encouraged to investigate the possibility of applying the most recent
19、editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IS0 128-20: 1 996, Technical drawings - General principles of presentat
20、ion - Part 20: Basic conventions for lines. IS0 128-22:1999, Technical drawings - General principles of presentation - Part 22: Basic conventions and applications for leader lines and reference lines. IS0 128-30:-l), Technical drawings - General principles of presentation - Parl30: Basic conventions
21、 for views. IS0 128-40:-), Technical drawings - General principles of presentation - Part 40: Basic conventions for cuts and sections. IS0 128-50:-), Technical drawings - General principles of presentation - Part 50: Basic conventions for representing areas on cuts and sections. IS0 129:1985, Techni
22、cal drawings - Dimensioning - General principles, definitions, methods of execution and special indications. IS0 2203: 1973, Technical drawings - Conventional representation of gears. IS0 3040:1990, Technical drawings - Dimensioning and tolerancing - Cones. IS0 5261 :I 995, Technical drawings - Simp
23、lified representation of bars and profile sections. IS0 641 0-1 :1993, Technical drawings - Screw threads and threadedparts - Part 1: General conventions. l) To be published. Page 3 IS0 128-24 : 1999 Application .i imaginary lines of intersection .2 dimension lines IS0 6428: 1 982, Technical drawing
24、s - Requirements for microcopying. IS0 1 O1 331 994, Technical drawings - Simplified representation of moulded, cast and forged pads. IS0 10578:1992, Technical drawings - Tolerancing of orientation and location - Projected tolerance zone. Reference to IS0 - 129 3 General principles .6 outlines of re
25、volved sections .7 short centre lines .8 root of screw threads .9 origin and terminations of dimension lines The basic types of lines, their designations and dimensions as well as general rules for draughting of lines are specified in IS0 128-20. 128-40 - 641 0-1 129 Requirements for microcopying ar
26、e specified in IS0 6428. .16 projection lines .17 grid lines .18 preferably manually represented termination of partial or interrupted views, cuts and sections, if the limit is not a line of symmetry or a centre linea 4 Types of lines and their application The first part of the line number in Table
27、1 is the number of the basic type in accordance with IS0 128-20. - - - Table 1 - Types of lines and applications No. 01.1 - Line Description and representation Continuous narrow line Continuous narrow freehand line - .3 extension lines I 129 I .4 leader lines and reference lines I 128-22 I .IO diago
28、nals for the indication of flat surfaces 1-1 bending lines on blanks and processed parts .12 framing of details .13 indication of repetitive details .I4 interpretation lines of tapered features .15 location of laminations 1-1 Page 4 IS0 128-24 : 1999 Table 1 (continued) Line Description and represen
29、tation Reference to IS0 Continuous narrow line with zigzags - .19 mechanically represented termination of partial or interrupted views, cuts and sections, if the limit is not a line of symmetry or a centre linea .1 visible edaes 128-30 Continuous wide line 128-30 .2 visible outlines .3 crests of scr
30、ew threads 641 0-1 .4 limit of lenath of full depth thread 641 0-1 .5 main representations in diagrams, maps, flow charts .6 .7 .8 .1 hidden edaes system lines (structural metal engineering) parting lines of moulds in views lines of cuts and section arrows 5261 10135 128-40 Dashed narrow line _ 128-
31、30 .2 hidden outlines 128-30 Dashed wide line .1 indication of permissible areas of surface treatment, e.g. heat treatment .1 centre lines Long-dashed dotted narrow line .2 lines of svmmetrv .3 pitch circle of gears 2203 .4 pitch circle of holes Long-dashed dotted wide line .1 .2 position of cutting
32、 planes .1 outlines of adjacent parts .2 indication of (limited) required areas of surface treatment, e.g. heat treatment extreme positions of movable Darts 128-40 -.-.- Long-dashed double- dotted narrow line .3 centroidal lines .4 .5 initial outlines prior to forming parts situated in front of a cu
33、ttina plane .6 outlines of alternative executions .7 outlines of the finished Dart within blanks 10135 .8 framing of particular fielddareas .9 projected tolerance zone - 10578 of line on one drawing. Examples of applications are given in annex A. Page 5 IS0 128-24 : 1999 0,25 0,35 0,5a 0,7a 1 19 2 5
34、 Line widths and line groups 01.2 - 02.2 - 04.2 01.1 - 02.1 - 04.1 - 05.1 0,25 0,13 0,35 0,18 OS 0,25 0,7 0,35 1 0,5 1,4 0,7 2 1 On mechanical engineering drawings two line widths are normally used. The proportions between the line widths should be 12. The line groups are specified as shown in Table
35、 2. Table 2 - Line groups Dimensions in millimetres t I i Line group I Line widths for line No. The widths and groups of lines should be chosen according to the type, size and scale of the drawing and according to the requirements for microcopying and/or other methods of reproduction. Page 6 IS0 128
36、-24 : 1999 Annex A (informative) Examples of application Table A.l gives examples of the application of the different types of lines indicating the reference number given in Table 1. The figures are shown in first angle projection. It is understood that third angle projection could be used as well.
37、01.1 01.1.1 01.1.2 O1 .I .3 o1 .I .4 Table A.1 - Examples of application Continuous narrow line Imaginary lines of intersection 01.1 Dimension lines t-l Extension lines EEL1 Leader lines and reference lines Page 7 IS0 128-24 : 1999 Table A.1 (continued) Hatching Outlines of revolved sections 01. Sho
38、rt centre lines Root of screw threads #YE+;& Origin and terminations of dimension lines Diagonals for the indication of flat surfaces 01.1 01.1 Page 8 IS0 128-24 : 1999 Table A.1 (continued) Bending lines on blanks and processed parts Framing of details 01.1 Indication of repetitive details, e.g. ro
39、ot diameters of gears 01.1 Interpretation lines of tapered features T 01.1 01.1 Location of laminations, e.g. transformer plates 01.1 Page 9 IS0 128-24 : 1999 Table A.l (continued) Projection lines Grid lines 01.1 Continuous narrow freehand lines Continuous narrow lines with zigzags Continuous wide
40、line Visible edges I I 01.2 Visible outlines q$ 01.2 Page 10 IS0 128-24 : 1999 Table A.1 (continued) Crests of screw threads +q+U& Limit of length of full-depth thread 01.2 01.2 Main representations in diagrams, maps, flow charts 01.2 System lines I 20000 01.2.7 I 01.2.8 I Lines of cuts and section
41、arrows Parting lines of moulds in views 01.2 A-A 02.1 02.1.1 e- -.- 1 Dashed narrow line Hidden edges B-B 02.1.2 02.2 02.2.1 Hidden outlines Dashed wide line Indication of permissible surface treatment, e.g. heat treatment Page 12 IS0 128-24 : 1999 Table A.l (continued) Long-dashed dotted narrow lin
42、e Centre lines -! a 2, I i A2 A3 Al Lines of symmetry Pitch circles of gears 04.1 / Pitch circles of holes Long-dashed dotted wide line indication of limited areas (heat treatment, measuring area) Page 13 IS0 128-24 : 1999 Table A.l (continued) Position of cutting planes -.- I -I A I -I B Long dashe
43、d double-dotted narrow line Outlines of adjacent paris 05.1 U Extreme positions of movable parts 05.1 -A Centroidal lines I Initial outlines prior to forming n Page 14 IS0 128-24 : 1999 Table A.1 (continued) Parts situated in front of a cutting plane -i i 05.1 3utlines of alternative executions 05.1 lutlines of the finished part within blanks Y” / :rarnings of particular fields/areas 05.1 / rojected tolerance zone
