1、AFCWb F“REN*3824 96 = 30L2333 0030482 992 AECMA STANDARD NORME AECMA AECMA NORM prEN 3824 Edition P 1 May 1996 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (321 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.040.20 Descriptors : ENGLISH
2、VERSION Aerospace series Clinch-nuts, blind, self-locking, with counterbore, in corrosion resisting steel, Mos2 lubricated Classification : 600 MPa (at ambient temperature) / 315 OC Srie arospatiale crous sertir en aveugle, freinage interne, avec chambrage, en acier rsistant la corrosion, lubrifis M
3、os2 Classification : 600 MPa ( temprature ambiante) I 315 OC Luft- und Raumfahrt Einziehmutter, Blind-, selbstsichernd mit zylindrischer Aussenkung, aus korrosionsbestndigem Stahl, Mos2 geschmiert Klasse : 600 MPa (bei Raumtemperatur) / 315 OC This “Aerospace Series“ Prestandard has been drawn up un
4、der 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 Member countries. Subsequent to the publica
5、tion 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 (NPS) and formal agreement of the Offici
6、al Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX I Comments shoul
7、d be sent within cix months after the date of publication to I Edition approved for publication 1996-05-31 AECMA Gulledelle 94 E-1 200 BRUXELLES C3 Chairman Mr Arena I aecma 199 AECMA PREN*t382Lt 96 LOL23LL OOLOLi84 765 W Page 3 prEN 3824 : 1996 1 Scope This standard specifies the characteristics of
8、 self-locking through threaded blind clinch-nuts, with counterbore, in corrosion resisting steel, Mos2 lubricated. Classification : 600 MPa 1) / 315 OC 2) 2 Normative references IS0 5855-2 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts EN 2000 Aerospace series - Quality assura
9、nce - EN aerospace products - Approval of the quality system of manufacturers EN 2424 Aerospace series - Marking of aerospace products EN 2491 Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 3) EN 3042 Aerospace series - Quality assurance - EN aerospace products - Qualifica
10、tion procedure EN 3487 Aerospace series - Steel FE-PA13 - Softened - 500 5 Rm I700 MPa - Bar for machining - D, I 100 mm 4) 1) Corresponds to the minimum tensile stress which the clinch-nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher s
11、trength class. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the Mos2 lubricant. 3) Published as AECMA Standard at the date of publication
12、of this standard 4) Published as AECMA Prestandard at the date of publication of this standard AECPIA PRENL3824 9b m 1012311 0010485 bT1 - m Page 4 prEN 3824 : 1996 3 Required characteristics 3.1 See figure 1 and table 1 to table 3. Dimensions and tolerances are expressed in millimetres and apply be
13、fore Mos2 lubrication. Details of form not stated are at the manufacturers option. Configuration - Dimensions - Masses 3.2 Materials EN 3487 3.3 Surface treatment EN 2491, thickness not specified AECMA PREHx3824 96 LOL23LL OOLO48b 538 Page 5 prEN 3824 : 1996 Remove sharp edges 0,l to 0,4 o c r o h b
14、y deformation at manufacturers option , R 0.25max. R 0.15 max. 1) These values in micrometres apply before surface treatement. They do not apply to threads and sheared edges the surface texture of which will be as achieved by usual manufacturing methods. 2) Tooling marks are permitted in this area.
15、3) Diameter D may increase 0,Ol under the head for a length equal to 0,25 D. 4) The deviation - 0,02/ - 0,07 are only valid for the nominal grip length S. Figure 1 AECMA PRENx3824 96 H 1012311 0010487 474 H Diameter code Page 6 prEN 3824 : 1996 050 060 080 Table 1 : Dimensions Thread 1) MJ50,8 - 4H6
16、H MJ6xl - 4H5H MJ8xl - 4H5H max. B min. 8,95 I1 ,O5 13,45 8,6 10,7 13,l max. C min. l8 7,55 9,45 1 1,55 7,3 92 11,3 I lo 19,8 20,8 H ref. I 1,83 I 2,02 I 2,28 22 24,9 13,95 16,15 16,85 9,85 23 25,9 14,95 17,15 17,85 10,85 J ref. I 127 1) In conformity with IS0 5855-2. in the self-iocking zone the to
17、lerances apply before forming out-of-round. 2) Diameter D may increase 0,Ol under the head for a length equal to 0,25 D. Length code 030 040 050 060 070 080 O90 1 O0 110 120 S nom.1 min. I max. 3 I 2,25 I 3,75 4 I 3,25 I 4,75 6,25 7,75 8 I 7,25 I 8,75 9 I 8,25 I 9,75 i: I 9,25 I 10,75 10,25 11,75 12
18、 I11,25 I12,75 Table 2 : Lengths I I I 18,8 I 21 1 23,9 I 12,95 I 15,15 I 15,85 I 8,85 AECMA PREN*3824 96 3032333 O030488 300 040 050 Page 7 prEN 3824 : 1996 1,12 2,49 4,Ol 1,19 2,66 4,22 Table 3 : Masses Length Diameter code 1 code I 030 I 1,04 I 2,33 I - I I 060 I 1,27 I 2/82 7 4,43 I 080 I 1/42 I
19、 3,15 I 4,85 110 120 1- 1,72 1 380 I 5,69 1 1) Approximate values kg/l O00 pieces), calculated on the basis of 7,85 kg/dm3, 4 Designation EXAMPLE : Description block Identity block EN3,824-060050 Number of this standard Diameter code (see table 1) Length code (see table 3) NOTE : If necessary, the c
20、ode 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style A. See figure 1. AECMA PREN+3824 96 m 1012311 O030489 247 m Diameter code 050 060 080 Page 8 prEN 3824 : 1996 Axial test load Push out Torque out N N Nm min. min. min. 1) min. 2) 12 500 700 7,5 7,3 17 700 1 600 12,5 10,5 32 200 3 500 25,5 19 6 Technical specification 6. I Quality assurance - Approval of manufacturers : see EN 2000 ; - Qualification of products : see EN 3042. 6.2 Technical requirements See table 4. Table 4 : Test loads for qualification
