1、AECMA PREN2851 A7 m 1012311 000q2b3 8 m Approved by COMITE DE NORMALISATION of A.E.C.M.A. 1989-1 2-05 prEN 2851 A. E. C. M .A. STAN DARD NORME A.E.C.M.A. Edition 1 A.E.C.M.A. NORM December 1989 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL 88, boulevard Malesherbes, 750
2、08 PARIS -TEL. 45-63-82-85 UDC : Key words : The equivalent versions in French and German languages can be supplied by B.N.A.E, 8, rue Moreau-Vauthier 921 00 BOULOGNE-BILLANCOURT - FRANCE ENGLISH VERSION Aerospace series Marking of parts and assemblies I indications on drawings Srie arospatiale Luft
3、- und Raumfahrt Marquage des pices et ensembles Indications sur dessins Kennzeichnung von Bauteilen und Baugruppen Angaben in Zeichnungen This Aerospace series standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospafial). It is publishe
4、d on yellow paper in three equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote, AECMA PREN2451 89 2012312 00042b4 T W prEN 2851 Page 2 Brief history This draft European Standard has been prepa
5、red bythe European Association of Aerospace Manufacturers (AE C MA). After inquiries and votes carried out in accordance with the rules of this Association, this draft has successively received the approval of the National Associations and the Official Services of the member countries of AECMA, prio
6、r to its presentation to CEN. , AECMA PREN2851 89 1012312 000q2b5 L W prEN 2851 Page 3 1 Scope and field of application O. This standard defines the method of indicating on drawings, with the exception of engine drawings, the instructions for the marking of parts and assemblies for aerospace applica
7、tions. 2 Purpose of marking The marking shall allow the identification and traceability of parts and assemblies. 3 Indications on drawings 3.1 General Drawings shall indicate the location and composition of the marking and the marking process les) . 3.2 Marking symbol The marklng symbol shall be a c
8、ircle devided into 4 quadrants as shown in figure 1, containing the code(s) of the selected process(es) (see subclause 3.5). . This symbol is connected to the location of the marking by a line ending in an arrow or a dot (see subclause 3.3.2), The size of the symbol shall be compatible with micro-fi
9、lming requirements as well as those of computer aided design. . 3.3 Location of marking 3.3.1 Choice of location The location shall be chosen such that the marking : - does not impair the manufacturing tderances or the required surface conditions, - does not jeopardize strength, - remains visible af
10、ter installation, if possible. _ AECMA PREN2851 89 m 1012311 OOOLiZhh 3 m prEN 2851 Page 4 3.3.2 Identification 3.3.2.1 The line shall end in a dot or an arrow depending upon which view is used to indicate the surface (see figures 2 and 3). No precise location within an area on a surface Figure 2 Fi
11、gure 3 3.3.2.2 Location d.efined within an area on a surface The line shall end in a dot inside the zone defined by a fine chain-dotted line (see figure 4). This zone may be dimensioned Figure 4 3.3.2.3 Optional location The information concerning the composition of the marking (see subclause 3.4) a
12、nd the marking process (es) (see subclause 3.5) shall be combined wi.th reference to this standard (see clause 4). 3.4 Composition of the marking The marktng mav include any of the elements listed in table I. The choice of elements shall be the responsibilfty of the design office but in accordance w
13、ith the specific project rules. The composition shall he established on the drawinps by entering codes above the horizontal part of the identification line (see figure 5). 1-2 * - -7- Figure 5 AECMA PREN2851 89 9 10l12311 0004267 5 9 Code 1 2 3 prEN 2351 Page 5 Elements Part number of the part or as
14、sembly 1) with, possib1.y the modifj-cation number or issue status Manufacturers identification (name, logo, code! Serial number Table 1 4 5 6 Product ion bat ch numb er Material batch number Sub-contractors identification 7 8 Life code Material type !only for “as received“ parts) 9 10 11 - Category
15、 of the “as received part“ (casting, band and die forging) Identification of melt lof a casting! Customers stores code Inspection stamp 2) 2) Being always necessary, this element does not need a code. - 3) This information is not known by the Design Office at the time the drawings are issued, theref
16、ore it is not possible to al.ocate a code. Identification of non-conformance 3) 3.5 Marking process The marking processes are set out in table 1. The choice chal!_ be the responsibility of the Design Office but in accordance with the specific project rules. Requirements are indicated on the drawings
17、 as follows : 3.5.1 Only one process is permissibi.e The code corresponding to the chosen process (see figure 6) shall be written in the lower quadrant of the symbol. Figure 6 AECMA PREN2852 87 W 2012321 00011268 7 prEN 2851 Page 6 3.5.2 Codes corresponding to the chosen processes shall be written i
18、n the quadrants of the. symbol (see figure 7!, if necessarv, mu3.tiple symbo1.s shall be used (see figure 8). Choice of more than one process is permissible Figure 7 Figure 8 3.5.3 Process choice is unrestricted The corresponding code shall be placed in the lower quadrant figure 9). f the symbc (see
19、 Figure 9 AECMA PREN285L 89 W LOL23LL 0004269 O Table 2. O O Codes Processes A Adhesive label B Tag or marking on packing C Chemical engraving D Transfer (decal.) E Electrolytic engraving F Manual punch marking G Tool or machine engraving H - Fixed label J Sand blasting K Electric pencil I Control p
20、unch marking M Hot pressure P Paint I RI By casting or forging I S Silk screen print I T I Marking with indelible ink (by hand or stamp) t r7 Vibro-engrsve I I XI No process specified Y Laser c 4 Reference to this standard on drawings The following shall be written in the appripriate space, if provided, in the drawing title block, or nearby : Or, if the 1ocati.m 3-s optional (see 3.3.2.3) : Marking EN 2851 a- The composition of the part marking Il - 2) and the marking process (VI are to he considered as an example.
