1、A. E. C. M. A. STAN DAR D NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3368 Issue P 1 April 1990 EDITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TEL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Aerospace design standard Hol
2、es for locating pins Serie arospatiale Trous pour pieds de centrage Norme de conception Luft- und Raumfahrt Lcher fr Zylinderstifte Konstruktionsnorm This .Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatia
3、l). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that i
4、nterchangeability is affected, physically or functionally, without re-identification of the standard, After examination and signature of the AECMA Standard Checking Centre (NPS) and formai agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to
5、 CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by B.N.A.E. - 8, rue Moreau-Vauthier - 92100 BOULOGNE-BILLANCOURT Edition approved for publication Comments should be sent within six months C8 Chairman after the date of Dubtication decision Mr. WILLIA
6、MS I A.E.c.M.A. I 88, Bd. Malesherbes 25th April 1990 75008 PARIS - FRANCE aecma 1990 , AECMA PREN3368 90 W 10123LL MO559I i W prEN 3368 Page 3 1 Scope and field of application 1.1. This standard provides particulars of hole sizes and associated fitting conditions to suit locating pins EN 3150 and E
7、N 3151 series. 2 References EN 3150 Aerospace series - Pin, shoulder, headless, in NI-PIOOHT. EN 3151 Aerospace series - Plain dowels in NI-PIOOHT (INCO 718) i). (INCO 718) 1) 3 Locating pins 3.1 Table 1 gives the nominal locating pin diameters, their tolerance grade and tolerance sizes. able .1 Nom
8、 pin dia 3 4 5 6 7 8 10 Dimensions in millimetres Tolet ance Tolerance grade + Min t 0,016 t 0,010 r6 t 0,020 + 0,012 P6 + 0,024 + 0,015 4 Hole sizes, positional tolerances and chamfer sizes 4.1 Refer to Figure 1 for typical callout. 4.2 Hole sizes shall be in accordance with clause 7 Table 2 and cl
9、ause 8 Table 3. 4.3 Positional tolerances for holes shall be in accordance with clause 7 Table 2, clause 9 Table 4 and clause 10 Table 5. 4.4 Chamfers shall be in accordance with Figure 3. 5 Counterbore sites 5.1 Counterbores shall be in accordance with Table 6 and Figure 4. 5.1.1 Counterbores are o
10、nly applicable when using locating pins EN 3150 series. (i) Published as AECMA pre-standard at the date of publication of the present standard. -_ I AECMA PREN3368 90 W 10i12311 0005592 T W prEN 3368 Page 4 BREAK SHARP EDGES 0,30mm+.0,20mm CHAMFERS N.HOLES TO TABLE 3. (INTERFERENCE . D/ Figure 1 6 A
11、ir release holes 6.1 An air release hole shall be provided in the end of blind holes Figure 2 For pin sizes 3mm to 4mm inclusive the air release hole shall be 1,5mm diameter. For pin sizes 5mm or greater the air release hole shall be 2,Omm diameter. I BREAK SHARP EDGES 0,30mm 2 0,20mm SURFACE TEXTUR
12、E TO BE LOJ . Figure 2 , AECMA PREN33bB 90 W LllL231rL 0005593 L prEN 3368 Page 5 7 Hole tolerance grade designations Table 2 Flange Hole pitch circle ma ter ia1 diameter or max centre distance Over To 75 Steel - Heat 75 250 Resisting 250 500 alloys and 500 1600 Ti tan ium 1600 - 75 Light 75 250 Al
13、loyc 250 500 - 500 1600 1600 - Dimensions in millimetres Clearance Hole Inter- positional ference hole tolerance hole 0 0104 fi 0,05 D9 d 0108 H7 0 0110 c9 0 0114 0 0,04 - 0 0,05 D9 I I 8 Dimensional particulars for holes rable 3 Dimensions in millimetres Nom Interference hole I Clearance hole pin I
14、 I Dg I cg I R7 dia H7 I 3 3 010 3,000 3,085 3,045 3 O00 2,990 3,060 3,020 4 4,012 4 I O03 4,100 4 t 060 4 , O00 3 I 991 4 I 070 4 , 030 6 6,012 6 1003 6 I 100 6 I O60 6,030 6 I O00 5 t 991 6 , 070 7 7,015 7 I 005 7,116 71076 7 I 000 6,990 7 I O80 7,040 8 8,015 8 I005 8 116 8 076 8 , 040 8 , O00 7 9
15、90 8 I O80 10 10,015 10,005 10,116 10,076 10 I O00 9 1900 10 1 O80 101040 I I I I AECMA PREN3368 90 H 1012311 0005594 3 M I prEN 3368 Page 6 9 Fitting conditions in steel, nimonic, titanium and similar alloys Table 4 Dimensions in millimetres Pitch circle Fit at interference Fit at clearance end dia
16、meter or maximum Nom pin diameter Nominal pin diameter centre dis tance s3 3 6 - 3 6 OVER M 56 - 3 $6 0,009 TC 0,029 INominal pin diameter 53 O, 048 0,061 0,088 0,101 0,034 - A BREAK SHARP EDGES 0,30rnm tO,20mm 1,25mm t 0,lSmm Figure 4 AECMA PREN33bB 90 W 10L23LL 0005596 7 W prEN 3368 Page 8 Table 6 - counterbore sizes Dimensions in millimetres Nom i na1 pin dia I I nom to1 I 051 7 69 8 0 10 12 10
