1、ASD STANDARD NORME ASD ASD NORM prEN 4234 Edition P 3 September 2008 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.orgSupersedes Edition P 2 March 2005 CO
2、RRIGENDUM 2009-01-31 ENGLISH VERSION Aerospace series Clamps, worm drive Dimensions, masses Srie arospatiale Colliers vis tangente Dimensions, masses Luft- und Raumfahrt Schellen mit Schneckentrieb Mae, Massen Modification Page 4 Title of Footnote instead of “Alternative tolerances for M = 27; e = 0
3、,6 0,05.“ read “ Alternative tolerances for M 27; e = 0,6 0,05.“. Note: prEN 4234, Edition P 3, September 2008, has been distributed by publication notice listpr05 dated September. Edition approved for publication 30 September 2008 Comments should be sent within six months after the date of publicat
4、ion to ASD-STAN Mechanical Domain Copyright 2008 by ASD-STAN Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or net
5、working permitted without license from IHS-,-,-prEN 4234:2008 (E) 2 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Required characteristics.3 3.1 Configuration Dimensions Masses 3 3.2 Materials and surface treatment.6 3.3 Tightening torque 6 3.4 Design .6 4 Designation 7 5 Marking .7 5
6、.1 Field 17 5.2 Field 27 6 Technical specification .7 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has
7、received approval for Publication. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4234:2008 (E) 3 1 Scope This standard specifies the characteristics of worm drive clamps designed for use with suitab
8、le rubber hoses to form joints in fluid system pipelines for aerospace applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of t
9、he referenced document (including any amendments) applies. EN 2424, Aerospace series Marking of aerospace products. EN 2465, Aerospace series Steel FE-PA3901 (X2CrNi18-9) Softened 450 MPa Rm 680 MPa Bar for machining 4 mm De 100 mm. EN 2516, Aerospace series Passivation of corrosion resisting steels
10、 and decontamination of nickel base alloys. EN 3077, Aerospace series Clamps worm drive Technical specification. 1)EN 3487, Aerospace series Steel FE-PA3601 (X6CrNiTi18-10) Air melted Softened Bar for machining a or D 250 mm 500 MPa Rm 700 MPa. EN 3488, Aerospace series Steel FE-PA3601 (X6CrNiTi18-1
11、0) Air melted Softened Sheet and strip a 6 mm 500 MPa Rm 700 MPa. EN 10088 (all parts), Stainless steels. 3 Required characteristics 3.1 Configuration Dimensions Masses The configuration shall correspond with the Figure 1. Details of form not defined are at the manufacturers option. Dimensions shall
12、 correspond with Figure 1 and Tables 1 to 3. 1) Published as ASD Prestandard at the date of publication of this standard. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4234:2008 (E) 4 Key 1 Field 1
13、for marking 2 Field 2 for marking Figure 1 Table 1 Dimensions Dimensions in millimetres Form b1b2b3b4b5b6d2d3e l1s t max. max. max. 030,+h13 0,05 max. h12 L 16 11,3 12 0,15 1,9 3,6 0,1 4 0,1 8 30 2,75 0,25M a10/16 to 16/27 10,9 8,9 2,7 0,13030,+6 20,8 1,35 0,27M a23/35 to 380/400 12 10 8 0,15 1,2 2,
14、6 020,+1,2 7 0,7 22 7 1,6200,N 7,5 7,3 5 0120,+1 4 0,4 13 1,2020,+aAlternative tolerances for M = 27; e = 0,6 0,05.Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4234:2008 (E) 5 Table 2 Clamp ranges
15、and masses Size code d1Mass a Size code d1Mass a min. max. N L M min. max. L M mm g/piece mm g/piece 011 7 11 3,6 190 170 190 55,0 016 10 16 7,9 200 180 200 56,0 019 10 19 4,0 210 190 210 58,0 022 12 b 22 24,0 8,5 220 200 220 60,0 027 16 27 25,0 10,6 230 210 230 62,0 39,4 035 23 35 25,5 14,6 240 220
16、 240 63,0 045 25 45 28,0 14,3 250 230 250 64,0 050 32 50 29,0 16,6 260 240 260 66,0 060 40 60 31,0 17,9 270 250 270 68,0 44,5 070 50 70 33,0 19,3 280 260 280 70,0 080 60 80 35,0 20,6 290 270 290 72,0 090 70 90 38,0 21,9 300 280 300 74,0 100 80 100 40,0 24,7 310 290 310 75,0 49,5 110 90 110 41,0 26,1
17、 320 300 320 76,0 120 100 120 44,0 27,1 330 310 330 77,0 130 110 130 45,0 340 320 340 79,0 140 120 140 47,0 30,7 350 330 350 80,0 54,5 150 130 150 49,0 360 340 360 82,0 160 140 160 50,0 370 350 370 83,0 170 150 170 52,0 380 360 380 84,0 180 160 180 54,0 34,8 390 370 390 85,0 59,5 400 380 400 86,0 64
18、,5 a Calculated on the basis of a density of 7,85 kg/dm3.bFor form L: d1min. = 14. Table 3 Configuration Details of form Code Locking wire hole H (with locking wire hole) (without locking wire hole) Shape of head R (round) S (hexagonal) Copyright ASD-STAN Provided by IHS under license with AECMA Not
19、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4234:2008 (E) 6 3.2 Materials and surface treatment See Table 4. Table 4 Materials and surface treatment Material Band Housing Screw Surface treatment Code According to EN 3487a passivated according to EN 2516 Accor
20、ding to EN 2465apassivated according to EN 2516 A According to EN 3487awithout B According to EN 3488aAccording to EN 3488aAccording to EN 2465awithout C aAlternative material according to EN 10088. 3.3 Tightening torque Form L: max. 6 Nm Form M: max. 2,5 Nm Form N: max. 0,8 Nm 3.4 Design The housin
21、g shall be firmly attached to the band. Sharp edges are not permissible and the inner edges should be rounded or beaded. NOTE Clamps of form N are only equipped with a stamped band and undrilled, round-headed screw. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reprodu
22、ction or networking permitted without license from IHS-,-,-prEN 4234:2008 (E) 7 4 Designation EXAMPLE Description block CLAMP Identity block EN4234M035HRA Number of this standard Code letter for form (see Table 1) Size code (see Table 2) Code for locking wire hole (see Table 3) Code for shape of hea
23、d (see Table 3) Code optional for material and surface treatment (see Table 4) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marking 5.1 Field 1 According to Figure 1. According to EN 2424, style C plus code letter of form L and M style F p
24、lus code letter of form N. 5.2 Field 2 According to Figure 1. Indication of the clamping range (d1 min./d1 max.); e. g. 10/16. 6 Technical specification According to EN 3077. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
