1、BRITISH STANDARD AEROSPACE SERIES Extruded section in aluminium alloys General tolerances The European Standard EN 2066:2001 has the status of a British Standard ICs 49.025.20 BS EN 2066:2002 Wk present to the responsible European committee any enquiries on the interpretation, or proposals for chang
2、e, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cr oss-r e fer enc e s The British Standards which implement internationa
3、l or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ?International Standards Correspondence Index?, or by using the ?Find? facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all
4、 the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard. having - been prepared under the direction of the Engineering Summar
5、y Of pages Sector Policv and Stratew This document comprises a front cover, an inside front cover, the EN title page, -_ Committee, was published pages 2 to 8. an inside back cover and a back cover. under the authority of the Standards policy and Strategy Committee on 07 January 2002 The BSI copyrig
6、ht date displayed in this document indicates when the document was last issued. O BSI 07 January 2002 ISBN O 580 38027 O EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2066 December 2001 ICs 49.025.20 English version Aerospace series - Extruded section in aluminium alloys - Genera I to lera nc
7、es Srie arospatiale - Profils fils en alliages daluminium - Tolrances gnrales Luft- und Raumfahrt - Strangpreprofile aus Aluminiumlegierungen - Allgemeine Toleranzen This European Standard was approved by CEN on 2 May 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations whic
8、h stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standa
9、rd exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standard
10、s bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISA
11、TION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2066:2001 E EN 2066:2001 (E) Foreword This European Standard has been prepared by the European Association of Aerosp
12、ace Manufacturers (AECMA) . After inquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standar
13、d shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the latest by June 2002. According to the CENKENELEC Internal Regulations, the national standards org
14、anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 2 EN 2066:2001 (E)
15、O Introduction This standard is part of the series of EN metallic material standards for aerospace applications. The general organization of this series is described in EN 4258. 1 Scope This standard specifies the general tolerances of: Extruded section in aluminium alloys for aerospace applications
16、. It applies: - to sections, standardized or defined by a drawing, the cross section of which, regular or irregular, can be inscribed in a circle of 250 mm (see figure I), Figure 1 - to semi-hollow sections, the dimensional limits of which are indicated in figures 2 and 3. x.y2 2,5x2 y.z2 2,5x2 Figu
17、re 2 Figure 3 For sections with higher dimensions or of more complex forms, the tolerances shall be subject to agreement between the manufacturer and purchaser. 3 EN 2066:2001 (E) A A 20, tolerances shall be the subject of an agreement between the manufacturer and the user b) Tolerances on B See tab
18、le 2. Table 2 Dimensions in millimetres Table 2 (concluded) Dimensions in millimetres Tolerances on B for: I B 50 18 mm 3.2 Lengths The tolerance of the sections in fixed length shall be (+ *: ) mm. 5 EN 2066:2001 (E) 3.3 Bead seat radius The tolerances of the bead seat radius shall be f 10 % of the
19、 radius value with a minimum tolerance of f 0,4 mm. 4 Form tolerances 4.1 Straightness See figure 5. Key 1 Plane sutface I Figure 5 On total length XI, the difference in straightness YI shall satisfy: YI 1,5 4.3 Angular dimensions The angular dimensions a shall be measured at the point of origin of
20、the angle, as indicated in figure 7. The angular tolerance Aa between the two faces is given in table 3: Angular tolerance Aa f 1,5 O *I0 Figure 7 Table 3 4.4 Twist The twist Vshall be measured as indicated in figure 8. VkxB Figure 8 7 EN 2066:2001 (E) of enveloping circle The twist tolerances indic
21、ated in table 4 apply to sections with linear masses superior to 0,250 kg/m. Table 4 k max. on the total length per meter length Dimensions in millimetres D 25 Diameter 0,05 0,lO Values of coefficient k 50 D 100 100 D 250 0,03 0,05 0,02 0,04 25 D 50 I 0,04 0,07 8 BS EN 2066:2002 BSI 389 Chiswick Hig
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