1、DEUTSCHE NORM November 1999 Technical drawings - General principles of presentation Part 22: Basic conventions and applications for leader lines and reference lines (IS0 128-22 19991 DIN - IS0 128-22 ICs 01.1 00.01 Technische Zeichnungen -Allgemeine Grundlagen der Darstellung -Teil 22: Grund- und An
2、wendungs- regeln fr Hinweis- und Bezugslinien (IS0 128-22 : 1999) This standard incorporates International Standard IS0 128-22 Technical drawings - General principles of presentation - Part 22: Basic conventions and ap- plications for leader lines and reference lines. A comma is used as the decimal
3、marker. National foreword This standard has been prepared by ISO/TC 1 O. The responsible German body involved in its preparation was the Normenausschu Technische Grundlagen (Fundamentals in Technology Standards Committee). The DIN Standards corresponding to the IEC Publication and the International
4、Standards referred to in clause 2 and in the bibliography of the IS0 Standard are as follows: IEC Publication/ DIN Standard(s) IS0 Standard IEC 61 082-1 DIN EN 61082-1 IS0 128-20 DIN IS0 128-20 IS0 129 DIN 406-1 O and DIN 406-1 1 IS0 1101 DIN IS0 11 O1 IS0 1302 DIN IS0 1302 IS0 2553 DIN EN 22553 IS0
5、 5459 DIN IS0 5459 IS0 6428 DIN IS0 6428 IS0 6433 DIN IS0 6433 IS0 13715 DIN 6784 National Annex NA Standards referred to (and not included in Normative reference and Bibliography) DIN 406-1 O Engineering drawing practice - Dimensioning - Concepts and general principles DIN 406-1 1 Engineering drawi
6、ng practice - Dimensioning - Principles of application DIN 6784 Workpiece edges - Terminology, indications on drawings DIN EN 22553 Welded, brazed and soldered joints - Symbolic representation on drawings (IS0 2553 : 1992) DIN EN 61 082-1 Preparation of documents for use in electrical engineering -
7、Part 1 : General requirements DIN IS0 128-20 Technical drawings -General principles of presentation - Part 20: Basic conventions for lines (IS0 128-20 : 1996) IS0 Standard comprises 9 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN IS0 128-22 : 1999-1 Y
8、 Deutsches Institut fr Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 08 Sales No. 0408 04.00 Page 1 IS0 128-22 : 1999 Technical drawings - General principles of presentation Part 22: Basic conventions an
9、d applications for leader lines and reference lines Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Ea
10、ch 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, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the Internatio
11、nal Electrotechnical Commission (IEC) in 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 fo
12、r voting. Publication as an International Standard requires approval by at least 75% of the member bodies casting a vote. International Standard IS0 128-22 was prepared by Technical Committee ISOTTC 1 O, Technical drawings, product definition and related documentation, Subcommittee SC 1, Basic conve
13、ntions. IS0 128 consists of the following paris, under the general title Technical drawings - General principles of presentation: Part 20: Basic conventions for lines Part 21: Preparation of lines by CAD systems Pari 22: Basic conventions and applications for leader lines and reference lines Pari 23
14、: Lines on construction drawings Part 24: Lines on mechanical engineering drawings Part 25: Lines on shipbuilding drawings Part 30: Basic conventions for views Pari 31: Additional conventions for views Part 40: Basic conventions for cuts and sections Part 4 1: Cuts and sections for mechanical engine
15、ering drawings Pari 50: Basic conventions for representing areas on cuts and sections Part 60: Additional conventions for cuts and sections Annex B forms an integral part of this part of IS0 128. Annex A is for information only. Page 2 IS0 128-22 : 1999 1 Scope This part of IS0 128 specifies general
16、 rules on the presentation of leader and reference lines and their components as well as on the arrangement of instructions on or at leader lines in all kinds of technical documents. 2 Normative reference The following normative document contains provisions which, through reference in this text, con
17、stitute provisions of this part of IS0 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 IS0 128 are encouraged to investigate the possibility of applying the most recent edition of the n
18、ormative document 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 1 28-20: 1 996, Technical drawings - General principles of presentation - Patt 20: Ba
19、sic conventions for lines. 3 Terms and definitions For the purposes of this part of IS0 128, the following terms and definitions apply. 3.1 leader line continuous narrow line which establishes the connection between the features of a graphical representation and additional alphanumeric and/or writte
20、n instructions (notes, technical requirements, item references, etc.) in an unambiguous manner 3.2 reference line continuous narrow line connecting with the leader line horizontally or vertically and on or at which the additional instructions are indicated 4 Presentation of leader lines Leader lines
21、 are executed as continuous narrow lines in accordance with IS0 128-20. They are drawn preferably at an angle to the relevant representation and/or the frame limiting the drawing sheet, and not parallel to adjacent lines, e.g. hatching lines. The inclination to the relevant lines shall be 15“. See F
22、igures 1 to 13. Leader lines may be drawn with sharp kinks (see Figure 5), and two or more leader lines may be joined up (see Figures 2, 5, 7, 8 and 11). They should not cross other leader lines, reference lines or indications, such as graphical symbols or dimensional values. Page 3 IS0 128-22 : 199
23、9 Leader lines shall terminate at the end which touches the features as follows: with a closed and filled or a closed arrowhead (included angle 15“) if the leader line ends at lines which represent outlines or edges of parts, pipings or cables in plans, charts or diagrams; arrowheads are also drawn
24、at crossing points of these lines with other lines, e.g. lines of symmetry (see the examples given in Figures 1 NOTE If several parallel lines have to be designated, oblique strokes instead of arrowheads are permitted (see IEC 61082-1). See the example given in Figure 8. with a dot (d = 5 x line wid
25、th) if the leader line ends within the outlines o an object (see the examples given in Figures 9 to li); without any termination if the leader line ends at another line, e.g. dimension line or line of symmetry (see the examples given in Figures 12 and 13). to 7); Figure 1 Figure 3 Figure 5 +- Figure
26、 7 Figure 2 Figure 4 Figure 6 M I Figure 8 Page 4 IS0 128-22 : 1999 Figure 9 Figure 11 Figure 13 Figure 10 Figure 12 5 Presentation of reference lines Reference lines are executed as continuous narrow lines in accordance with IS0 128-20. A reference line may be added to each leader line. It is drawn
27、 in one of the reading directions of the drawing. The reference line shall be drawn - either with a fixed length, .e. 20 x line width of the reference line (see the examples given in Figures 15 and 16), - or with a length adapted to the length of the indicated instructions (see the examples given in
28、 Figures 14, 17, 21 and 22). IS0 . M20 x 2 - LH /- / d Figure 14 LL mm2 Figure 16 Figure 15 1 /Ml0 - LH x 35/42 Figure 17 Page 5 IS0 128-22 : 1999 In particular cases of application the reference line has to be drawn (see the example given in Figure 15). However, the reference line may be omitted, i
29、f the leader line is drawn in one of the reading directions of the drawing and if the indicated instructions are written in the same direction (see the example given in Figure 18), and in all other cases in which this line is not applicable (see the examples given in Figures 12, 19 and 20). Figure 1
30、8 Figure 19 Figure 20 6 Indication of instructions The instructions belonging to the leader lines shall be indicated as follows: - preferably above the reference line (see the example given in Figures 14, 17, 21 and 22 and in annex A); - centrically behind the leader or reference line (see the examp
31、le given in Figure 16 and 18); or - around, within or behind graphical symbols according to the valid International Standards (see the examples given in Figures 21 and 22 and in annex A). Taking into account the requirements for microcopying in IS0 6428, the instructions should be written at a dista
32、nce of twice the line width of the reference line above or below the reference line. They should not be drawn within the reference line and they should not touch it. Figure 21 If individual layers or assembled parts of an object are designated with one leader line, the order of the indications shall
33、 correspond with the order of the layers or the parts (see the example given in Figure 22). 1160 - 5800 4 I Figure 22 Page 6 IS0 128-22 : 1999 Annex A (informative) Graphical supplements contained in other International Standards 8 International Standard IS0 2553 IS0 2553 IS0 2553 IS0 5459 IS0 6433
34、IS0 1101 IS0 1101 IS0 129 Application Indication of further information concerning welds, e.g. the number of the welding process Designation of a field or site weld Identification of the location of a weld Datum target frame Indication of item references (IS0 6433 does not specify only this method)
35、Frame used for geometrical tolerance requirements Indication of several toleranced features Indication of dimensions of arc lengths Page 7 IS0 128-22 : 1999 I Graphical supplement International Standard IS0 1 1 O1 :-, Table 2 IS0 1101:-, 9.1 IS0 1302:1992,4.6 IS0 1302:1992, clause D.4 IS0 2553:1992,
36、 7.1 IS0 101 35:1994, 6.2 IS0 101 351 994,6.4 IS0 137151994, 4.2 Application This sign (circle) has the following meanings in the International Standards mentioned below: geometrical (profile) tolerance all around the profile profile tolerance of the entire outline of the cross section surface textu
37、re on all surfaces around a part roughness on all surfaces a peripheral weld all around a part features, e.g. burr, all around a part machining allowance which applies to all surfaces the same state of corner all around a Part a The sign “circle“ is used for different meanings in the above-mentioned
38、 International Standard, e. g. “all around (profile)“ (IS0 1101) and “all surfaces/corners“ (IS0 130211SO 13715). This unfortunate situation should be replaced by an unambiguous solution for all cases of application (see Annex B). It should be taken into account that no sign is needed if any require
39、ment is to be valid for all sutfaceskorners of a part. In this case the generally valid requirement should be specified by a note (an entry) near the view or cut (section) of the part, within or near the title block or in the space provided for general notes. Page 8 IS0 128-22 : 1999 Annex B (normat
40、ive) Meaning and application of the graphical supplement “circle“ for leader lines The same required characteristic on a number of surfaces or corners of a part connected to each other may be indicated only once if a circle (d = 8 x width of the leader line) is drawn at the connecting point of the l
41、eader line and the reference line, see Figures B.l to 8.3. This means that the same requirements apply to all surfaces or corners around the contour or profile of the represented part. The “circle“ sign shall not be used if either or both of the following occur: a) the indications are ambiguous, b)
42、the indication concerns all surfaces or corners of a pari. La 5 n . - Figure B.1 Figure 8.2 Figure 8.3 Page 9 IS0 128-22 : 1999 Bibliography l IS0 1293 985, Technical drawings - Dimensioning - General principles, definitions, methods of execution and special indications. 2 IS0 11 O1 :-I), Geometrica
43、l Product Specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, location and run-out. 3 IS0 1302:1992, Technical drawings - Method of indicating surface texture. 4 5 IS0 2553:1992, Welded, brazed and soldered joints - Symbolic representation on drawings. IS0 5459:i 981, T
44、echnical drawings - Geometrical tolerancing - Datums and datum-systems for geometrical tolerances. 6 IS0 6428:1982, Technical drawings - Requirements for microcopying. 7 8 9 l O IS0 6433: 1981, Technical drawings - Item references. IS0 1 O1 35:1994, Technical drawings - Simplified representation of moulded, cast and forged parts. IS0 13715:1994, Technical drawings - Corners - Vocabulary and indication on drawings. IEC 61082-1 :1991, Preparation of documents used in electrotechnology - fart 7: General requirements. To be published. (Revision of IS0 1 1 O1 : 1983)
