1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2591 -422 Edition P 1 May 1996 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.060 Descriptors : Aircraft industry, aircraft equipment, connectin
2、g equipment, test ENGLISH VERSION Aerospace series Elements of electrical and optical connection Test methods Part 422 : Locking wire hole strength Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 422 : Rsistance des trous pour fil de freinage Luft- und Raumfahrt Ele
3、ktrische und optische Verbindungselemente Prfverfahren Teil 422 : Widerstand der Sicherungsdraht-Lcher This “Aerospace 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-Mem
4、bers. 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 content shall not be changed to an extent that interchangeability is affected, physically or function
5、ally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPSI and formal agreement of the Officiai Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for for
6、mai vote. 1 Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Edition approved for publication 1996-05-31 Comments should be sent within six months after the date of publication to AECMA Gulledelle 94 B-1200 BRUXELLES
7、 C2 Chairman Mr Pezzeta aecma 199 AECMA PRENx2591- 422 96 W LOL23ltL OOL04L.5 288 Page 3 prEN 2591 -422 : 1996 1 Scope This standard specifies a method of verifying that the locking wire holes in an element of connection are of sufficient strength to meet normal usage. It shall be used together with
8、 EN 2591. 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. For dated references, subsequent amendments to
9、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 referred to applies. EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods -
10、 General 3 Preparation of specimens 3.1 The specimen shall be coupled to a connector or simulation thereof, which in turn shall be mounted on a rigid mounting plate. Locking wire as specified in 5, or in the technical specification, shall be threaded through a locking wire hole and secured to permit
11、 the application of an axial load. When there are several holes the one which shows the most unfavourable mechanical strength conditions shall be tested. 3.2 - material and gauge of the locking wire, if other than as specified in 5.1; - axial load if other than as specified in 5.1. Unless specified
12、in the technical specification the following details shall be stated 4 Apparatus A suitable means of measuring an applied axial load. 5 Method 5.1 An axial load of (133 k 0,5) N shall be applied perpendicular to the axis of the hole using a stainless steel wire 0,5 mm diameter (see figure 1). It sha
13、ll be increased steadily until the specified value is reached ; its rate of application shall not exceed 45 N/s. It shall be maintained for 5 min. E Figure 1 AECMA PRENx25qL- 422 96 = LOL23LL OOL04Lb LI4 Page 4 prEN 2591 -422 : 1996 5.2 Requirement The locking wire hole shall remain intact. The specimen shall not be damaged by the test wire .e. no tearing open of the material from the bore of the hole to the outer surface of the component. Small deformations of the knife edge are permissible.
