1、EURPEAN STANDARD NORME EUROPENNE EN 2544 EUROPISCHE NORM April 1987 Key words : Graphic methods, graphic symbols, technical drawings, rivets. English version Aerospace series Representation of rivets on drawings for aerospace equipment Srie arospatiale Reprsentation des rivets sur les dessins de mat
2、eriols arospatiaux Luft- und Raumfahrt Darstellung von Nieten in Zeichnungen von Luft- und Raumfahrtgert This European Standard was accepled by CEN on 1986-08-1 2. CEN members are bound to comply with the requirements of CEN Internat Regulations which stipulate the conditionsfor giving tnis Eurcpeor
3、i Standard the status of a nalioiial stariclard 4thoat any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Central Secretariat or to any CEN member. This European Standard exists in three official versions (Engl
4、ish, French, German). Aversion in any other language made by translation under the responsibility of a CEN member into its own language and notified to CEN Central Secretariat has the same status as the official versions. CECmombers are the national standards organizations of Austria, Belgium, Denma
5、rk, Finland, France, Germany, Greece, Ireland, Italy, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Cornite Europen de Normalisation Europisches Komitee fr Normung Central Secretariat : Rue Brderode 2, B-1 O00 Bruxelles CFN 1
6、987 Copyright reserved to ail CEN members r- - -7 Ref. Nr EN 2544 : 1987 E - -d k- c 1 EN 2544 Page 2 CEN EN*2544 87 W 3404589 0002510 4 W Brief history This draft European Standard has been prepared by the European Association of Aerospace Constructors (AEQIA). After enquiries arid votes carried ou
7、t in accordance with the rules of this Association It lias successively rcccived the approval of the National Associations and the Official Services of the mcmber,couiitrics of AECMA, prior to its presentation to C.E.N. According to the Common CENICENELEC Rules, following countries , are bound to im
8、plement this European Standard: - .-.-_ Belgium, Germany, Italy, Netherlands, Spain, United Kingdom. i e- EN 2544 Page 3 I 1 Scope and field of application This standard specifies the representation of rivets on drawings for aerospace equipment. 2 General The representation of rivets on drawings sha
9、ll conform to one of the following two methods: .- either by conventional drawing of the rivets. This method is more particularly riiihle for drawings containing - or by the use of symbols. This method is more specially suited for drawings coniaining a large nurnber O rivets a small number ot rivets
10、, or when the use of symbols does not offer all the Safeguards for understariding. I and is covered by the followirig clauses of this standzrd. It shall meet the requireinents arising from nicrccopving and reproduction of drawings. 3 Presentation of symbols 7 he teference of this standard shall be q
11、uoted in all drawings contairihg rivets by this sfmbol method. 3.1 Symbols for a set rivet A ret rivet is indicated by a cross. a? The quadrants of the cross contain the information regarding rivet and rivet assembly. See next paragraphs. i . CEN EN*2544 7 3404589 O002532 A E b , Symbol Significance
12、 - - Solid rivet R23 = Rivet ident. 23 in parts lis: or in a table EN 2544 Page 4 - 3.1.1 Indications in upper left hand quadrant lhe following appear in this quadrant: - letter R, indicating that the cross represents a rivet I), - the nurrwical iefermce allocated 10 the rivet in the definitions par
13、?$ list of the drawing or in a table on the drawing giving the necessary information for definition of the rivet (head form, material, diameter, length, surface treatment,). Example: Cornpcsite rivet I I 32 or R32 =: Nmerical refermce ili rivet In parrs List cir in a table In the case of a composite
14、 rivet, if the sleeve i5 covered by a numerical reference in the pai% list, this reference shall be entered below that of the rivet. Exainie: 1 - Symbol -7 Sign if ica nce 32 R32 35 35 or C.- 3,1.2 Indications of upper right hand quadrant This- quadrant contains a letter giving the position of the p
15、reformed head. If the preformed head appears distinctly on the drawing, the letter is unnecessary. - N for Near side - F for far side Examples : rc 1 Symbol Significance - Preiormed head, near side Preformed head, far side II- 11 The use of letter R is opticinal. If it is used, it shall be followed
16、by the numerical reference allocated to the rivet. * Symbol TI- - 2/82 i CEN EN*254Y 87 3404587 0002CL3 T U EN 2544 Page 5 Significance 100“ dimpling, near side Two sheets, 82“ dimpled on far side 3.1.3 Indications of lower left hand quadrant 3.1.3.1 Countersink A countersink shall be indicated by a
17、n equilateral triangle orientated as follows in the quadrant : - v for the-near side - A for the far side If this countersink appears clearly on the drawing, indication by a triangle is unnecessary. If the countersink angle is loOD, the triangle is sufficient. if the countersink angle is other than
18、loo, the value of the angle is placed on the right of the triangle. Examples: I Symbol Significance 100“ countersink, near side 82“ countersink, far side - 1019 coir nersink, both sides 3.1 3.2 Dimpiirig Diin!pirig sntli tt indicatcd by c v symbol orientaied 3s fdlows in he quar!rant: - v fcr tne ne
19、w side - A for the far side CEN EN*2599 87 m 3909589 00025I9 I m 3.1.3.3 Combined countersink and dimpling The combination of a countersink and a dimpling shall be indicated by v synibol and an equilateral triangle The orientation of these symbols and the angle indication shall conform to paragraph
20、3.1.3.1 and 3.1.3.2 . If appropriate, the angle shall be quoted after those symbols. Examples: Significance - 7 1st sheet dimpled, 100, on near side 2nd sheet countersunk, looo, on near side - 1st sheet dimpled, 82“, on near side 2nd sheet countersunk, 82“, on near side v vc2 3.1.4 Lower right hand
21、quadrant This quadrant does not con;ain any information. 82 3.2.1 Th crosse!. ate iiiigiied : -. Either III th? direction of ttie line of rivets Exarnplc: Symbols used for a Iiiw of rivets - - Or along tho axes of the drawing Examplo: I tr : k - - CEN EN*Z54q 87 3q04584 OOOZSL5 3 EN 2544 Page 7 $ Th
22、e indications are given either in the drawing, if space is available, (ir outside it, with an arrow indicating the Wrresponding rivet assembly. Examples: .- 52.2 The position of the rivets as well as the riveting pitch shall be indicated with dimensions iy conventional drawing methods. When the rivets arc aligned, identical and equi-distant, the indications should be entered in the first and last cross of the series. Example: 4 I VI I I I I
