1、fi CEN EN82851 72 3404587 0024527 T EUROPEAN STANDARD EN 2851:1992 NORME EUROPENNE EUROPISCHE NORM Harch 1992 UD C 629.7-2 : 62-777: 744.4 Descriptors: Aircraft industry, drawings, machine components, marking, specification English version !Aerospace series - Marking of parts and assemMiq other than
2、 engines - Indications on a drawings Srie arospatiale - thqwgedes pieces et ensembles autres que moteurs - Indications sur dessins Lu,:- und Raumfahrt - Kinre.;hnung von Baute4 Len und Bsugruppen ausgenomen Triebwerke - Angaben in Zeichnungen This European Standard was approved by CEN on 1592-03-20.
3、 CEN meribers are bound to coarply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards nay be obtained on
4、 application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat
5、 has the same status as the official versions. CEH Pieaibers are the national standards bodies of Austria, Belgium, Denmrk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdoni. CEN European Committee for
6、Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart,36 &10M ruuels O 1992 Copyright reserved to CEN melibers Ref. No. EN 2851:1992 E I CEN EN*285L 72 3404587 0024528 L Page 2 EN 2851:1992 Foreword d This European Standard has been prepar
7、ed by the European Association of Aerospace Manufacturers (AECMA). After enquiries and votes carried out in accordance with the rules of this Association, this Standards has successively received the approval of the ,National Associations and the Official Services of the member countries of MCMA, pr
8、ior to its presentation to CEN. National Standards indentical to this European Standard shall be published at the latest by 1992-09-30 and conflicting national standards shall be withdrawn at the latest by 1992-09-30. According to the Common CENKENELEC Rules, the following countries are bound to imp
9、lement this European Standard : Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN EN*285L 92 m 3404589 0024529 3 m Page 3 EN 2851 : 1992 1 Scope and field of application
10、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 applications. It is applicable whenever referenced. 2 Purpose of marking The marking shall allow the identification and traceabili
11、ty of parts and assemblies. 4 - 3 Indications on drawings 3.1 General Drawings shall indicate the location and composition of the marking and the marking process(es). 3.2 Marking symbol A circle divided into 4 quadrants as shown in figure 1. Figure 1 This symbol shall be connected to the location of
12、 the marking by a line ending in an arrow or a dot (see 3.3.2). The size of the symbol shall be compatible with micro-filming requirements as well as those of computer aided design. 3.3 Location of marking 3.3.1 Choice It shall be such that the marking : - does not impair the manufacturing tolerance
13、s or the required surface conditions, - does not jeopardize strength, - remains visible after installation, if possible. CEN EN82851 92 = 3404587 0024530 T Page 4 EN 2851 : 1992 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 sur
14、face (see figures 2 and 3). No precise location within an area on a surface I- l -._ - . Figure 2 Figure 3 3.3.2.2 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. Location defined within an area on a surface - I ! Figure 4
15、 . 3,3.2,3 Optional location The information concerning the composition of the marking ,ee 3.4) and the marking process(es)(see 3.5) shall be combined with reference to this standard (see 4). 3.4 Composition of the marking The marking may include any of the elements listed in table 1, The choice of
16、elements shall be the responsibility of the design office but in accordance with the specific project rules. The composition shall be established on the drawings by entering codes above the horizontal part of the identification line (see figure 5). U I Figure 5 . Code 1 2 3 4 5 - CEN EN*2851 72 m 3L
17、i04587 OOZY531 1 m Elements Part number of the part or assembly 1) with, possibly the modification number or issue status Manufacturers identification (name, logo, code) Serial number Producdon batch number Material batch number Page 5 EN 2851 : 1992 6 7 8 9 Table 1 Sub-contractors identification Li
18、fe code Material type (only for as received s parts) Category of the a as received part s (casting, band and die forging) _ 10 11 - - _ Identification of melt (of a casting) Purchasers stores code inspection stamp 2) identification of non-conformance 31 3.5 Marking process The marking processes are
19、set out in table 2. The choice shall be the responsibility of the design office but in accordance with the specific project rules. It shall be indicated on the drawings as follows : 3.5.1 Only one process is permissible The code corresponding to the chosen process (see figure 6) shall be written in
20、the lower quadrant of the symbol. Figure 6 CEN EN*2B5L 92 m 3404589 0024532 3 Page 6 EN 2851 : 1992 3.6.2 Choice of more than one process is permissible Codes corresponding to the chosen processes shall be written in the quadrants of the symbol (see figure 7). If necessary, multiple symbols shall be
21、 used (see figure 8). ! Figure 7 Figure 8 33.3 Process choice is unrestricted -The corresponding code shall be placed in the lower quadrant of the symbol (see figure 9). . Figure 9 - CEN EN82851 92 M 3404589 0024533 5 A B C Page 7 . EN 2851 : 1992 Adhesive label Tag or marking on packing Chemical en
22、graving Table 2 E i F G H* J 1 Codes I Processes 1 Electrolytic engraving Manual punch marking Tool or machine engraving Fixed label Sand blasting L M P R I D I Transfer (decal) I Control punch marking Hot pressure Paint By casting or forging I K I Electric pencil I I S I Silkscreen print I T I Mark
23、ing with indelible ink (by hand or stamp) I I V I Vibro-engrave I I X I Noprocessspecified I Iy a.ser I 4 Reference to this standard on drawings The following shall be written in the appropriate space, in the drawi,ng title block, or nearby : or, if the location is optional (see 3.3.2.3) : I The composition of the marking (1 -2) and the marking process (V) are to be considered as an example.
