1、AECMA PREN30bLI 88 - 9 LOL23Ll OOOV845 8 ,- - - - - c A. E.C. M .A. STAN DARD prEN 3064 NORME A.E.C.M.A. Issue P 1 A.E.C.M.A. NORM October 1988 Edition approved for publication Comments should be sent within six months after the date of publication decision DIT PAR LASSOCIATION EUROPENNE DES CONSTRU
2、CTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TL. 45-63-82-85 C8 Chairman UDC : Key words : ENGLISH VERSION Aerospace series Self-locking serrated shank nuts Assembly procedure Srie arospatiale crous dentels sertir freinage interne Procdure de montage Luft- und Raumfahrt Selbs
3、tsichernde verzahnte Einnietmuttern, Einbauverfahren This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved
4、 by the experts of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the st
5、andard. 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 European Standard to CEN (European Committee for Standardization) for final vote. 17th October 1988 A.E.C.M.A. 88,
6、 Bd. Malesherbes Mr. WILLIAMS 75008 PARIS - FRANCE aecma 1988 O a AECMA PREN30bY 88 1012311 0004847 L . - prEN3064 Page 3 1 Scope This process standard specifies tho conditions of assembly of self-locking serrated shank nuts prEN3014 and prEN3015 and shall be observed whenever invoked on drawings an
7、d working documents 2 References EN3014 : Aerospace series - Self-locking serrated shank nuts in heat resisting steel FE-PA 92 HT (A 286). Classification : il00 i?;F2/650 C. EN3015 : Aerospace series - Self-locking serrated shank nuts irr heat resisting steel FE-PA 92 HT (A 286). Silver plated. Clas
8、sification : 1100 MPn/650 OC. 3 Swaging of the nuts The swaging of the nuts is obtained by flaring the end of the serrated shank crf the nut with a 60 inclusive tapered punch. The approximative load necessary for the swaging operation is 15000 N. The punch must be aligned with the axis of the nut in
9、 order to prevent creating overstresses or cracks on the fiared shank. During this operation the punch must not rotate. The dimensions and tolerances of the punch and the anvil to be used are shown by the Figure 1 and the table hereafter. These tools are suitable for both shapes of nuts. R - 3oogE P
10、revious page is blank R 0.1 - 0.3, Figure 1 AECMA PREN30b4 88 m L0123LL O004848 3 ! prEN3064 Page 4 Dimensions - Table Dimensions in millmetres , 1 Diameter code 0E 0P R 0s 0T of the nut max max + min max min min max min 050 3,8 8,l 7,9 2,2 1,8 9,8 9,2 8,8 060 38 9,l 8,9 2,2 1,8 9,8 10,Z 9,8 079 7,l
11、 10,z 10 2,4 2,G 7,1 11,3 10,9 080 7,l 11,3 11,l 2,4 2,O 11,l 12,3 11,9 Ou Inax I Inin ?0,6 10,4 11,6 11,4 12,8 12,6 L 13,7 13,5 4 Control of the swaging 4.1 The swaged area shall show no cracks or corrugations. 4.2 The bearing surface of the nut shall bear ccmpletely on the base. 4.3 The perpendicu
12、larity defect af the assembled nut will be in accordance with figure 2. Pitch diameter = - I ilIl I r/m I I N/A I l Figure 2 4.4 In the case of silver plated nuts, the flaki.ng of the coating in the swaging area is acceptable. Meanwhile any loose flakes of silver coating are to be removed. 5 Indication on drawings . (identification of the nut) /Assembled to EN3064 I I I a 8
