1、AECMA STANDARD NORME AECMA AECMA NORM prEN 4420 Edition P 1 August 1999 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Guiledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: 49.060 Descriptors: Aircraft industry ENGLISH VERSION Aerospace se ri
2、es Clips, spring tension, in alloy steel FE-PA3903 Srie arospatiale Colliers lyre, en acier allier FE-PA3903 Luft- und Raumfahrt Federklammer, aus legiertem Stahl FE-PA3903 This “Aerospace Series“ Presfandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace
3、Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical confenf shall not be changed to
4、 an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft Eur
5、opean Standard to CEN (European Commitfee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopoiis 54 - 199. rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX I Edition approved for publication I Comments should be sent within six months after the
6、 date of Dublication to 1999-08-31 AECMA Gulledelle 94 8-1200 BRUXELLES I C8 Chairman Mr Feltham aecma 1999 STDOAECMA PREN 4420-ENGL 1999 = 101231L 001b380 682 S Page 3 prEN 4420: I999 1 Scope This standard specifies the characteristics of spring tension clips for the support of electrical harnesses
7、, in FE-PA3903 for aerospace applications. Maximum operating temperature: 250 “C 2 Normative references EN 2424 EN 4528 Aerospace series - Marking of aerospace products Aerospace series - Steel FE-PA3903 (X12CrNi18-10) - Cold rolled - Strip for springs - a I 3 mm - I 250 MPa I R, I I 640 MPa I) Aero
8、space series - Clips, spring tension, in alloy steel FE-PA3903 - Technical specification Aerospace series - Clips, spring tension - Design recommendations Aerospace series - Clips, spring tension - Assembly procedure EN 4585 TR 4586 TR 4587 3 Required characteristics 3.1 See figures I and 2 and tabl
9、es 1 and 2. Dimensions and tolerances are in millimetres. Details of form not stated are left to the manufacturers discretion. Configuration - Dimensions - Tolerances - Masses 3.2 Material EN 4528 1) In preparation at the date of publication of this standard Previous page is blank STDoAECMA PREN 442
10、0-ENGL L999 LOL23LL 00Lb38L 519 I Page 4 Diameter code 040 050 060 prN 4420: 1999 Tightening A Ba C a D E F G J t Mass parts range kg/l O00 h6 max. max. f 0,05 min. % 4 to 5 4 10,5 3,5 1,55 5 to 6 5 il 4,5 0,5 10,7 2,05 8,65 0,45 1,7 6 to 7 6 11,5 5 2,55 2 1,45 q Cutareas Remove sharp edges (barrel
11、deburring) CLIP DEFINED W A FLAT WACE HALF SECTION W-W 2 HoLES.01.7 R1.5 to 2 1) Marking is allowed on both insertion wing tapes. Figure I - Spring tension clip: style A Table 1 - Spring tension clip: style A 3D VIEW a in stress condition: when surface referenced A is flat and when a diameter A mand
12、rel is maintained by the clip STD*AECMA PREN 4420-ENGL 1999 M 1012311 001b382 455 I Page 5 prEN 4420: 1999 7 Cutareas Remove sharp edges (barrel deburring). R mex. HALF CECTIW U-W R 2.5 to 3 NOTE : STRESS CIiNDiTIflN : W%n Surface referexed A i Lat itnd when a A mrdcei is riiaintairi-d by th+ clip 1
13、) Marking is allowed on both insertion wing tapes. Figure 2 - Spring tension clip: style B Table 2 - Spring tension clip: style B 210 21 to 24 21 23,5 14,5 31 9,5 22,6 6,8 17 33 Il 25,4 7,4 18 240 24 to 27 24 26 16,8 O 33 . 018 t Mass kgll O00 parts min. m 391 3,4 3,65 3,75 4,5 5 63 797 0,45 0,55 a
14、In stress condition: when surface referenced A is flat and when a diameter A mandrel is maintained by the clip I Page 6 prEN 4420: 1999 4 Designation EXAMPLE: Description block Identity block CLIP, SPRING EN4420-080 Number of this standard Diameter code (see tables 1 and 2) NOTE If necessary, the co
15、de 19005 shall be placed between the description bloc and the identity -.Jck. 5 Marking See table 3 and as indicated on figures 1 and 2. Table 3 Spring tension clip EN 2424 Style Style 6 Technical specification Qualification and acceptance: EN 4585 7 Application Design recommendations: TR 4586 Assembly procedure: TR 4587
