1、BRITISH STANDARD AEROSPACE SERIES BS EN 3612:1997 Undercuts for splines Design standard The European Standard EN 3612:1996 has the status of a British Standard ICS 49.030.99BSEN3612:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published un
2、der the authority of the Standards Board and comes into effect on 15 January 1997 BSI 11-1998 The following BSI references relate to the work on this standard: Committee reference ACE/14 Draft for comment 88/76177 DC ISBN 0 580 26900 0 Committees responsible for this British Standard The preparation
3、 of this British Standard was entrusted to Technical Committee ACE/14, Aerospace details and parts, upon which the following bodies were represented: British Iron and Steel Producers Association Civil Aviation Authority (Airworthiness Division) Federation of Wire Rope Manufacturers of Great Britain
4、Institute of Petroleum Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBSEN3612:1997 BSI 11-1998 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Symbols
5、 and definitions 3 4 Required characteristics 3 5 Designation 5 6 Drawing presentation 5 Figure 1 Undercuts for external splines (code E) 3 Figure 2 Undercuts for internal splines (code G) 4 Figure 3 Untitled 5 Table 1 Undercut diameters 4 Table 2 Untitled 4 List of references Inside back coverBSEN3
6、612:1997 ii BSI 11-1998 National foreword This British Standard has been prepared by Technical Committee ACE/14 and is the English language version of EN 3612:1996 Aerospace series Undercuts for splines Design standard, published by the European Committee for Standardization (CEN). EN 3612:1996 was
7、produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard d
8、oes not of itself confer immunity from legal obligations. Cross-reference Publication referred to Corresponding British Standard ISO 4156:1981 BS 6186 Specification for straight cylindrical involute splines: metric module, side fit Part 1:1981 Dimensions and tolerances Summary of pages This document
9、 comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cove
10、r.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3612 August 1996 ICS 49.040.20 Descriptors: Aircraft industry, relief groove, spline, design, characteristic, dimension, dimensional tolerance, designation English version Aerospace series Undercuts for splines Design standard Srie arospatiale G
11、orges de dgagement pour cannelures Norme de conception Luft- und Raumfahrt Freistiche fr Verzahnungen Konstruktionsnorm This European Standard was approved by CEN on 1996-06-29. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
12、uropean 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 Central Secretariat or to any CEN member. The European Standards exist in three official versions (Engli
13、sh, 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Fi
14、nland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050
15、Brussels 1996 Copyright reserved to CEN members Ref. No. EN 3612:1996 EEN3612:1996 BSI 11-1998 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, t
16、his 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 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at
17、the latest by February 1997, and conflicting national standards shall be withdrawn at the latest by February 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denma
18、rk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.EN3612:1996 BSI 11-1998 3 1 Scope This standard defines the undercuts for chip clearance and tool runout for the manufacture of splines with slo
19、tting tools. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments
20、to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO 4156, Straight cylindrical involute splines Metric module, side fit Generalities,
21、dimensions and inspection Amendment 1: Section3: Inspection. 3 Symbols and definitions For the purpose of this standard, the following definitions apply: D ei , D ie , m: see ISO 4156; D e : nominal diameter, undercut for external spline; D g : nominal diameter, undercut for internal spline. 4 Requi
22、red characteristics See Figure 1 and Figure 2 and Table 1 and Table 2. Dimensions and tolerances in millimetres. Figure 1 Undercuts for external splines (code E)EN3612:1996 4 BSI 11-1998 Table 1 Undercut diameters Table 2 Figure 2 Undercuts for internal splines (code G) Diameters R Code D ieor D ei
23、D eor D g 0,1 0,1 E 80 D e= D iemin. 0,5 0,6 80 1 G 80 D g= D eimin. + 0,5 0,6 80 1 L A 0,25 54 4 + 0,8 m 54 L/12 + 0,8 m m = module, see ISO 4156.EN3612:1996 BSI 11-1998 5 5 Designation EXAMPLE: 6 Drawing presentation EXAMPLE: see Figure 3. Alternatively the undercut may be fully dimensioned on the
24、 drawing. Figure 36 blankBSEN3612:1997 BSI 11-1998 List of references See national foreword.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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