1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 2002-01-31 prEN 2327 Edition P 1 January 2002 Comments should be sent within six months after the date of publication to AECMA-STAN Mr Feltham Gulledelle 94 Mechanical Domain 8-1200 BRUXELLES PUBLISHED BY THE EUROPEAN ASSOCIATION
2、 OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 6-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 i 1 ICs: ENGLISH VERSION Aerospace series Washers, lock, with radial serrations in alloy steel, cadmium plated for flight control rods Dimensions Will supersede EN
3、2327: 1986 Srie arospatiale Freins a stries radiales en acier alli, cadmis pour bielles de commandes de vol Dimensions Luft- und Raumfahrt Sicherung en , rad ia1 verzahnt , aus legiertem Stahl, verkadmet fr Bediengectnge von Flugsteuerungen Mae This Ylerospace Series“ Prestandard has been drawn up u
4、nder the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent t
5、o the publication of this Prestandard, the technical content shall not be changed fo an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as
6、a draft European Standard to CEN (European Committee for Standardization) for formal vote. Page 2 prEN 2327: 2002 Blank page Page 3 prEN 2327: 2002 1 Scope This standard specifies the characteristics of lock washers with radial serrations primarily intended for flight control rods. These lock washer
7、s are intended to immobilise the rod end in relation to the rod body, whilst allowing a precise positional adjustment. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate
8、places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication r
9、eferred to applies. EN 2000 EN 2133 EN 2438 EN 2439 Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Aerospace series - Cadmium plating of steels with specified tensile strength I 1 450 MPa, copper, copper alloys and nickel alloys Steel F
10、E-PL62 - 900 MPa 5 R, 5 1 1 O0 MPa - Bars De 5 40 rnm - Aerospace series 1) Steel FE-PL62 - 900 MPa I R, 5 1 I O0 MPa - Forgings De I 40 mm - Aerospace series 1) 3 Required characteristics 3.1 Dimensions - Mass Configuration shall correspond to figures 1 , 2 and 3. The dimensions and masses shall co
11、nform with values quoted in tables 1 and 2. Dimensions apply after cadmium plating. 3.2 Surface roughness Ra = 3,2 pm. This value applies prior to cadmium plating. 3.3 Material Steel according to EN 2438. Steel according to EN 2439. 3.4 Surface treatment Cadmium plated according to EN 21 33, 1 O prn
12、 to 20 prn. I) Published as AECMA Standard at the date of publication of this standard Page 4 prEN 2327: 2002 Dimensions in millimetres Dimensions in millimetres d2 I 1 o -. t i B-B 30“13 A-A X a N equidistant serrations R0,5 to0,8 R0,3 to 0,4 Identification mark Figure 2 - Element for rod end side
13、- Code B a N equidistant serrations R0,5to 0,8 R0,3 to 0,5 Identification mark Figure 1 - Element for rod body side - Code A Figure 3 - Thickness of lock washer assembly Table 1 Dimensions in millimetres - a1 f 0,15 i0,l +tB5 f0,25 8,2 12,7 058 0,80 14,2 22,O 1-1 16,3 25,4 1,8 0,86 Page 5 prEN 2327:
14、 2002 Lhneter code 08 10 12 14 16 N U a1 + a4 Mass lock washer Number of assembly serrations mm g min. max. f 0,3 is 42 8721 8821 2,38 18 6,O 50 8742 8842 2,80 43 3,l O 58 3,16 96 56 8920 90“ 4 Designation EXAMPLE: Lock washer Element, rod body side, according to figure 1 Element, rod end side, acco
15、rding to figure 2 Lock washer assembly Description block Identity block WASHER LOCK EN2327AC Number o, standard Code for the lock washer (see table 3) Diameter code (see table 1) Code A B C NOTE If necessary, the code 19005 shall be placed between description block and identity block. Table 3 5 Mark
16、ing In addition to the manufacturers own marking, each lock washer and its packaging shall be marked, using the identity block as defined in clause 4 of this standard. The marking position and method are at the manufacturers option. The marking, when it is possible, shall be indelible and shall not impair the characteristics of the lock washer. 6 Qualification According to EN 2000.
