1、-.-_-_I_-_ CEN PRE“*324B 92 W 3404589 0029273 302 A. E .C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3240 Issue P 2 July 1992 EDIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATERIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cdex -Tl. (1)
2、47.36.98.76 Supersedes issue PI April 1989 UDC : Key words : ENGLISH VERSION Aerospace series Nuts, seif-locking, clip, in heat resisting steel FE-PA92HT (A286), uncoated Classification : I 100 MPa (at ambient temperature) / 425 OC Srie arospatiale Luft- und Raumfahrt crous pincer, freinage interne,
3、 en acier rsistant chaud FE-PA92HT (A286), Classification : 1 I O0 MPa ( temprature ambiante) / 425 OC Klemmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA92HT (A286), Klasse : 1 100 MPa (bei Raumtemperatur) / 425 OC non revtus blank This Aerospace Series. pre-standard has been drawn up under
4、 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 by the experts of the concerned Commission following comment by the Member countries. Subsequent to the public
5、ation 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 standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Offi
6、cial Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54. 199. rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Edition approved
7、for publication 1992-07-06 Comments should be sent within six months after the date of publication decision A.E.C.M.A. Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cdex - FRANCE C8 Chairman Mr. WILLIAMS aecma 1992 prEN 3240 Page 3 1 Scope This standard specifies the charac
8、teristics of self-locking clip nuts in FE-PA92HT for aerospace applications. . Classification : 1100 MPa )/425 OC 2, 2 References IS0 5855-1, Aerospace - MJ threads - Part 1 : General requirements IS0 5855-2, Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts EN 2424, Aerospace se
9、ries - Identification marking of standard fasteners 3, EN 3152, Aerospace series - Propulsion standard parts - Nuts, self-locking, in heat resisting steel FE-PA92HT (A286) - Classification : 1100 MPA/425 OC - Technical specification 4) EN 3638, Aerospace series - Heat resisting alloy FE-PA92HT - Sol
10、ution treated - Sheet and strip a s 3 mm 5, EN 3639, Aerospace series - Heat resisting alloy FE-PA92HT - Rm 2 900 MPa - Cold worked and softened - Bar and wire for continuous cold forging or extrusion of fasteners - 3sD30mm5) EN 3741, Aerospace series - Clip nuts, metric - Installation holes and ass
11、embly 5, 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances - Masses The configuration of the clip nut in this standard is given as an example only. Forms not stated are at the manufacturers option. Only the maximum overall dimensions given in the table 1 and the interchangeabili
12、ty requirements are imposed. The minimum dimensions are limited by the requirements of the technical specification. Dimensions and tolerances are in millimeters. 3.2 Material Nut element : EN 3638 or EN 3639 Clip : EN 3638 1) The strength class of the bolt concerned which can withstand the load at a
13、mbient temperature when tested at 100% load without cracking or breaking the nut. 2) Maximum test temperature of the part 3) Published as AECMA standard at the date of publication of the present standard 4) Published as AECMA pre-standard at the date ot publication of the present standard 5) In prep
14、aration at the date of publication of the present standard Previous page is blank -_ _. CEN PRENx3240 92 E 3404589 0029273 T85 E prEN 3240 Page 4 6.3 Thread surfaces will be as achieved by normal method of manufacture J View B-B View A-A Deformation in this area to achieve self locking requirement T
15、ooling marks acceptable Identity Markings t Remove sharp edges 0,l to 0,4 All forms are acceptable within limit dimensions. Figure 1 Table 1 - Dimensions and Masses Thread 8.05 K 10 6.6 f 0,05 max. min. kg11000 Thickness Range 2.6 0.9-2 - - CEN PREN*3240 92 = 3404589 0029274 911 ! 4 Designation Exam
16、ple : Description block Identity block prEN 3240 Page 5 NUT EN3240-0t I I- Number of this standard ( Diameter code (see table 1) 3 - Note : If necessary, the design code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style F, at the location shown in the figure 1 6 Technical specification EN 3152
