1、STD.AECMA PREN 4424-ENGL 3998 = LOL23LL 0034397 57b W Edition approved for publication Comments should be sent within six months after the date of publication to AECMA STANDARD NORME AECMA AECMA NORM C1 Chairman prEN 4424 Edition P 1 February 1998 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE I
2、NDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Descriptors: ENGLISH VERSION Aerospace series Rod-ends, adjustable, single fork and threaded shank with engagement: 1,5 x thread diameter in titanium alloys Dimensions and loads Srie arospatiale
3、 Embouts rglables chape simple et tige filete implantation : 1,5 x diamtre filetage en alliages de titane Dimensions et charges Luft- und Raumfahrt Einstellbare Gabelkpfe, einfach, mit Gewindeschaft mit Einschraubtiefe 1,5 x Gewindedurchmesser aus Titanlegierungen Mae und Belastungen This “Aerospace
4、 Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace 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 Me
5、mber countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to 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
6、 (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 1998-02-27 I B-1200 BRUXELLES I AECMA Gulledelle 94 Mr streicher STD.AECMA PREN YYZY-ENGL L998 LOL23Ll 00Li1
7、348 902 Page 3 prEN 4424 1 Scope This standard specifies the characteristics of rod-ends for flight control rods. - a single fork; - a threaded shank comprising: - a circumferential groove to identify engagement: - an optional longitudinal groove for locking purpose. These rod-ends are intended for
8、use with control rods or rods for aircraft structures. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. F
9、or dated references, subsequent amendments to or revisions of any of these publications apply to this Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. IS0 3353 Aerospace - Roiled threads - Run-out and l
10、ead threads IS0 5855-2 Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts EN 2601 Aerospace series - Forkends, adjustable - Technical Specification EN 3315 Aerospace series - Titanium alloy Ti-P63, solution treated and aged R, I 1070 MPa - Forging EN 3353 Aerospace series - Titaniu
11、m alloy Ti-P63, solution treated and aged R, I 1100 MPa - Bars and wire for fasteners machined) TR 3775 Aerospace series - Bolts and pins - National materials 3 Required characteristics 3.1 Dimensions - Mass Configuration shall correspond with figure 1. The dimensions and masses shall conform with v
12、alues quoted in table 1. 3.2 Surface roughness According to figure 1 3.3 Material Titanium alloy according to EN 3315 or EN 3353 or TR 3775 R, 830 MPa on the whole rod-end. ) Published as AECMA standard at the date of publication of this standard. H2LK ( U5. FIUMMIM) Previous page is blank - Page 4
13、prEN 4424 1) Thread 2) In complete thread according to IS0 3353 3) Marking 4) Groove diameter d, min according to IS0 5855-2 NOTE: The circumferential groove and the longitudinal groove over distance F shall be painted red. Figure 1 H2LK (US.FRIAIM/M) x c m c cn I- E Page 5 prEN 4424 STD-AECMA PREN
14、4424-ENGL 1778 1CIlZ311 OCIL4351 TT7 T Page 6 prEN 4424 without longitudinal groove 4 Designation Each tab washer shall only be designated as in the following example: EXAMPLE: Description block ROD-END Number of EN standard Code for left-hand thread (see table 2) Diameter code (see table 1) Code fo
15、r longitudinal groove (see table 2) Table 2. Identity block EN 4424 L 08 K r Codes for thread and longitudinal groove I I left-hand thread I L I I R I right-hand thread I I K I with longitudinal groove I 5 Marking In addition to the manufacturers own marking, each rod-end and its packaging shall be marked according to figure 1, using the identity block as defined in clause 4 of this standard. The marking shall be indelible and shall not impair the characteristics of the rod-end. 6 Technical Specification According to EN 2601 HPLK (LI5.FUW)
