AECMA PREN 2066-1978 Extruded Sections in Aluminium and Aluminium Alloys General Tolerances Aerospace Series Edition 1《航空航天系列.铝和铝合金褶皱截面尺寸通用容差.第1版》.pdf

1、r- - Approved by The equivalent versions in French and German languages can COMITE DE NORMALISATION be supplied by B.N.A.E., 8, rue Moreau-Vauthier of A.E.C.M.A. 1977-06-24 92100 BOULOGNE-BILLANCOURT - FRANCE. la- /a-*/ FIGURE 4 The tolerances on A and B are given in table 1 and 2. All the tolerance

2、s for the dimensions shall be specified on the sectional drawing, . COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesI AECMA PREN2066 78 m 3022333 0003742 2 m prEN20aBp-ge .- TABLE 1 - Tolerances on thickness B Dimensions in millimetres

3、1 B max. Note : These tolerances apply when - B min. $4 B max. When 4 18 mm. I COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services -_- AECMA PREN20bb 78 a 30323Ll 0003743 4 a prEN2066 Page 6 1 a TABLE 2 - Tolerances on width A Dimensions i

4、n millimetres Width A Tolerances A B These tolerances apply when -,420 4.2 Fillet Radii Tolerance The tolerance on fillet radii shall be -i- 10 % with a minimum value of t O, 4 m. I * o 4.3 .Straightness Tolerance The tolerance on straightness shall be 0,2 % COPYRIGHT Association Europeene Des Const

5、ructeurs de Materiel AerospaceLicensed by Information Handling ServicesI AECMA PREN20bb 78 m 3032333 0003944 b m :prEN2066 Page 7 i 4.4 Transverse Flatness Tolerance The tolerance on transverse flatness e shall be 0,6 % with a minimum value of 0,2 mm. (see figures 5 and 6). 1 FIGURE 5 FIGURE 6 - 4.5

6、 Flange angular tolerance The flange angle shall be always measured from the origin of the angle. The flange angular tolerance measured between the two flanges of a profile (fi f Ure i) is: . hickness 1,5 m Ao( +- - io FIGURE 7 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceL

7、icensed by Information Handling Services AECMA PREN20bb 78 R LO12311 0001Lt5 8 prEN2066 Page 8 4.6 Longi tudina 1 Twis t To ler ance The longitudinal twist v shall be measured as indicated in figure 8. - v, f x b FIGURE 8 D - The tolerances in table 3 apply to sections whose mass is greater than 0,2

8、50 kg/m. TABLE 3 - Tolerances on longitudinal twist v Dimensions in millimetres -. - I Values of the coefficient f Diameter D 1 inaicative values in dei longitudinal twist/metre , 3O 2 30 2“ lo 30 -c- -e- I COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Informatio

9、n Handling Services4.7 Length Tolerance For extrusions ordered in fixed lengths the tolerance shall be a function of the length requested, i.e. + (6 + 0,2 % L) in millimetres O 8 5 DESIGNATION See the semi-finished product standards 6 MARKING The marking of the semi-finished products defined in this

10、 standard shall be in accordance with the Technical Specification EN2070 1) i) In preparation. - ._ -=_ _- L - COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Servicesc AECMA PREN2066 78 3032333 0003747 3 m prEN2066 Page i r t . _._ ANNEX Desig

11、nation of s ec t ion dimens ions Beaded L-Section Aluminium alloy extrusions Dimensions EN2 O4 7 I i Channel section Aluminium alloy Extrusions Dirnens ions EN204 9 I - _- - LI - L-Section Aluminium alloy Extrusions , Dimensions T -Section Aluminium Ex tr u s ions Dimensions EN2050 -,- o . COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services