1、prEN 2131 CEU : Key words : Edition 2 Aerospace series P1 ates Aluminium and aluminium alloys Srie arospatiale Luft- und Raumfahrt P1 aques P1 atter: Aluminium et alliages daluminium Aluminium und Aluniniumlegierungen DRAFT PROJET E N T W U R F 06521LO689T8 Draft no 3 05 / 89 . Sponsor : C. ROCHEREA
2、U prEM.2131 Page 3 . f- 1 5c.jpe and field of opplication This stataard aziinies the dimensions and tolerances of sheetsin aluminium an0 aluminium allotls used in aerospace constructions. EH 2123 Ell 2:24 Eli 2123 EN 2l26 - I EN 2419 Ei4 2422 EN 2511 EN 2Yi2 El.: 2513 Eli 2626 i EN 5684 EN 2087 EM 2
3、689 EN 2804 EN 2805 kerosxice series - Aluminium alloy 2618A-TG51 - Plates nim c: a - 12000 + 0,20 + 0320 + 0,20 + 0,25 + 0,30 O O O .o O + 0,20 + 0,20 + 0,25 . + 0,30 + 0,35 O O O O O + 0,20 + 0,25 + Us30 + 0,35 + 0,40 O O O O O - 3.3.2 Surface machined sheets The dimensiGns shall be ooreed upon be
4、tween the manufacturer and the purchaser. 3.4 Dimens i onkl io1 erances 2.4.1 Ttii cknesses S. 4 1.1 Unnachi ned siierts In accordance with iatle 2. Measorements shall be taken at least 20 mm from the edce. Table 2 Dimensions in millimetres Thicknesses b i250 6 5000 + 0,2 Po 1 O O *I 2.4.2 Ui eins L
5、engths 1 - 5000 + 10 m o Thicknesses 6 . a i 80 80 a 140 a As agreed 10 manufacturer between and 0,2 % 1 purchaser 3.4.3 Lonr;+hs Ir! ecccrdsnci :.rith table 4. Table 4 Dimensions in mi 11 imetres 3.5 Geometric tolerances 3.5.1 Squareners 3.5.1.: Method, of measurement Difference in leristh of the c
6、iiagonals AC - 6D. See figure 1. 3.5.1.2 Tolerances In accordmce with table 5. Table 5 i Dimensions in millimet 0652IL0689T8 AECMA PREN2131 89 W 10123Ll 0002217 2 W prEN 2131 Page G * 3.5.2 Local straightness In .accordatice with figure 2. The ciefect may be concave or convex. I Reference lines 3.5.
7、3 F1 a tnes s 3.5.3.1. Unmachined sheets 3.5.3.1.1 Method of measurement Figure 2 The sheet shall be placed OR a flat surface, the concave face oppcsite to this surface. The deviation F due to a bend, ladles, waviness of edges shall be measured according to figures 3 to 6 using an appropriate appara
8、tus. 4 Figure 3 - Transverse bend 0652IL0689T8 L AECMA PREN2131 87 m LR123Ll 0002218 4 -. prEN 2131 Page 9 1 I I W Figure 4 - Longitudhal bend CI I I W Figure 5 - Ladle Ilfi, p,- * 5 4. Figure 6 - Waviness of edge 0652ILC689T8 AECMA PREN2131 A9 1012311 O002219 b-m s . Thicknesses 6a50 - 50 a 150 prE
9、N 113; Page 10 f cr a chord of : 300 - W W=b W=I 0,3 X W 0,4 X b 0,2 2 1 0,3 X W 0.2 X b 0,2 2 1 3.5.3. i.: Tolerances In accorcnce cith table 6. Table 6 3.5.3.2 Surface machined sheet The sheets shell be plane so that they perrectly Platten on a vaccum table with a depression of 60 KPa evenly distributed on the entire surIace of the sheet. 4 Designation In accordance with EN 3600. 0652IL0619T8
