1、- CEN PRENS3740 92 3404589 0033583 021 A.E.C.M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3740 Edition P 1 November 1992 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AROSPATIAL Technopolis - 175. rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cdex - Tl. (1 ) 47.36.
2、98.76 UDC : Key words : ENGLISH VERSION Aerospace series Bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, Mos2 lubricated Classification : 1 1 O0 MPa (at ambient temperature) / 31 5 OC Srie arospatiale Luft- und Raumfahrt Axes tte hexagonale basse, avec
3、 tige paule tolrance serre, filetage court, en alliage de titane, lubrifis MOS, Classification : 1 100 MPa ( temprature ambiante) / 315 OC Sechskantpaschrauben. mit kleinem Kopf, kurzes Gewinde, aus Titanlegierung, MOS, geschmiert Klasse : 1 1 O0 MPa (bei Raumtemperatur) / 31 5 OC This .Aerospace Se
4、riesu 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 by the experts of the concerned Commission following comment by the
5、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 standard. After examination and signature of the AECMA Standard Checking Cen
6、tre (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. _ Nola . Extra copies can be supplied by B N.A E - Technopolis 54 - 199. rue Jean-Jacques Rousseau - 921 3
7、8 ISCV-LES-MOULINEAUX CEDEX 1 I Edition approved for publication Comments should be sent within six months after the date of publication decision AECMA Technopolis - 175, rue Jean-Jacques Rousseau 92138 Iss/ les Moulineaux Cdex - FRANCE 1992-1 1 -1 7 C3 Chairman M. ARENA _- - aecma 199 e CEN PRENu37
8、40 92 3404589 0033584 Tb8 W prEN 3740 Page 3 1 Scope 1 This standard specifies the characteristics of bolts, shouldered, with thin hexagonal head, close tolerance shank and short thread, in titanium alloy, Mos2 lubricated. Classification 1 100 MPa” / 31 5 OC ). These bolts are intended to be used wi
9、th washers EN 2414 and nuts EN 2415. 2 Normative references IS0 3353 Aerospace construction - Rolled threads - Runout and lead threads IS0 5855-2 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts IS0 7913 Aerospace - Fasteners - Tolerances of form and position for bolts and screw
10、s Aerospace - Titanium alio bolts - Strength classification 1 100 MPa and MJ threads - Procurement specification x, IS0 91 52 EN 2000 Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers EN 2414 Aerospace series - Counterbore washers in steel
11、 3, EN 2415 Nuts, hexagon, slottedlcastellated, thin, in steel, cadmium plated - Classification : 900 MPa I235 OC - Aerospace series 4, EN 2424 Aerospace series - Identification marking of standard fasteners 4, EN 2491 Aerospace series - Molybdenum disulphide dry lubricants - Coating methods ) EN 25
12、32 Titanium alloy TI-P68 - 1 100 MPa I Rm S 1 280 MPa - Bar De 5 25 rnm - Aerospace series 4) TR 3775 Aerospace series - Bolts and pins - National materials 5, 3 Required characteristics 3.1 Configuration - Dimensions - Masses See figures 1 and 2 and table 1. Dimensions and tolerances, expressed in
13、millimetres, apply after anodizing, but before lubrication. Form and position tolerances shall be in conformity with IS0 791 3. 3.2 Materials EN 2532 or TR 3775 (titanium alloy, classification 1 1 O0 MPa) / 31 5 OC2) 3.3 Surface treatment EN 2491 : 5 pm to 10pm 1) Minimum tensile strength of the mat
14、erial at ambient temperature 2) Maximum temperature that the shouldered bolt can withstand, without continuous change in its original characteristics, after return to ambient temperature. The maximum temperature is determined by the material. 31 In preparation at the date of publication of this stan
15、dard 4) Published as AECMA standard at the date of publication of this standard 5) Published as AECMA technical report at the date of publication of this standard _- Previous page is blank - - - -. CEN PREN*3740 92 M 3404589 0033585 9T4 D prEN 3740 Page 4 31 Values in micrometres, apply before surfa
16、ce treatment. Break sharp edges 0,l to 0,4 Li conforms to IS0 3353 20“ 1 O“ U For non-quoted dimensions and marking see figure 2. Figure 1 - Configuration for diameter codes 050 and 060 I I II M I i/ 03 max / /i I 11. conforms to - IS0 3353 conforms to Marking 7- Figure 2 - Configuratiori for diarwt
17、er codes 080 to 250 CEN PREN+3740 92 W 3404589 O033586 830 v- al a i-“ prEN 3740 Page 5 - CEN PRENx3740 92 m 3404589 0033587 777 m -_ prEN 3740 Page 6 . 4 Designation Example : Description block BOLT Identity block EN3740-050024 Number of this standard 1 Diameter code (see table 1) Length code (see table 1) Note : If necessary, the originator code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style A, see figure 2. 6 Technical specification IS0 91 52, except for approval of manufacturers, see EN 2000.
