1、L AECMA PREN2071 89 101231L 0006691 b a I. I- fs- -. prEN 2071 :- CDU : Key words : Edition 2 Aerospace series- klumi.rtium and aluminium alloys Sheets . %rie arospatiale Luft- und Raumfahrt Tles Bleche Altlninium et alliages dalllminium Aluminium und Aluminiumlegierungen I i - DRAFT PROJET ENTWURF
2、Draft no 2 . OS / 89 . Sponsor :. C. ROCHEREAU 0652SP0489T8 - AECMA PREN2071 89 I LOLZ311 000bb2 8 I -a prEX 2071 Page 3 1 Scope 2n6 field of.application This stondard defines the dimensions and tolerances or sheets- in aluminium and - aluniniun alloys use in aerospace constructions. 2 References Eh
3、 2072 FN 2087 EN 2088 EN 2089 EN 2090 EN 2091 EN 2092 EN 2395 EN 2691 EN 2692 *EN 2693 EN 2694 EN 2695 EN 2696 - Aerospace series - Alumiuiun 1050A-H14 - Sheet aad strip - I . . .- - 084 - herospace series - 0,8 5000 AECMA PREN2072 A W 1012322 000bbb 5 prES 2071 Page 7 ali thicknesses 5 10 0,2% 1 ,
4、I- 3.4.3 Leng chs (- In accordarice rith :able 1. Table 4 -. Dimensions in millimtres . I I Tolerances for a thickness : Lengths I 0,3 - . 3.5.1.2 Tolerances In accordance vith table 5. i See figure I. Table 5 Dimensions in milllmetrec 3,O as 6,O +5. O +1 o O +0,2% 1 O . 0652SP0489T8 89/761279 - AEC
5、MA PRENZ071 84 M 1012311 0006697 7 M - =. prES 2071 Page 8 - 3.5.2 Local straightness i In accordance with figure 2. The defect nay be concave or convex. 4 I E 1% Figure 2 3.5.3 Flatness 0652SP0489T8 ,. Figure 3 - Transverse bene L . 3.5.3.1 Method of measurement The sheet shall be placed on a flzt
6、surfce, ths cxcave face opposite to this surface. The deviation F due to a bend, ladles, wviness af edges shall be measured according to figures 3 to 6 using an apprcpritze appiratuc. -I Figure 4 - Longitudi-ai bezd 89 176 127 0,4% O, 45% . 03% 0.6% 0,3X . 0,35% 0,4% - 0,SX * prEN 2071 Page 9 4 W _.- -. Figure 5 - Ladle ., . -w- Figure 6 - Waviness of edge 3 i 5.3.2 Tolerances In accordance with table 6. Table 6 Thicknesses a3 - 3a56 4 . Designation In accordance with EN 2600. . (. .I I -I
