1、BS EN 3916:2008ICS 49.030.99NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Insert, thin wall Salvage procedure forcomponentsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 BSI 2008ISBN 97
2、8 0 580 60983 1Amendments/corrigenda issued since publicationDate CommentsBS EN 3916:2008National forewordThis British Standard is the UK implementation of EN 3916:2008.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A lis
3、t of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal ob
4、ligations.September2008BS EN 3916:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3916August 2008ICS 49.030.99English VersionAerospace series - Insert, thin wall - Salvage procedure forcomponentsSrie arospatiale - Douilles filetes, paroi mince -Procdure pour rcuprationLuft- und Raumfahrt - Gew
5、indeeinstze, dnnwandig -Verfahren fr Nacharbeit von BauteilenThis European Standard was approved by CEN on 3 April 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without
6、any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made
7、by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Ge
8、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGMa
9、nagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3916:2008: EBS EN 3916:2008EN 3916:2008 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Conditions of use.4
10、4 Re-machining of an existing insert hole .5 5 Insert and tapped hole particulars.6 6 Installation of oversize inserts .9 7 Minimum criteria for the installation and removal tools and their methods of application.9 8 Assembly drive tool and swage tool10 9 Assembly procedure .11 9.1 Insertion11 9.2 S
11、waging 12 9.3 Gauging and inspection13 10 Oversize insert removal, replacement and tools14 BS EN 3916:2008EN 3916:2008 (E) 3 Foreword This document (EN 3916:2008) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes c
12、arried 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 ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, eithe
13、r by publication of an identical text or by endorsement, at the latest by February 2009, and conflicting national standards shall be withdrawn at the latest by February 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and
14、/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republi
15、c, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3916:2008EN 3916:2008 (E) 4 1 Scope 1.1 This spe
16、cification covers the accepted methods for the reclamation of installation holes for standard thin wall inserts, within assemblies. 1.2 To enable rectification when defects or damage occur to the standard insert tapped installation hole, or to rectify any out of position of the hole within the speci
17、fied parameters of use. 1.3 To control the machining of the existing insert hole and the installation requirements of the replacement oversize thin wall insert. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, onl
18、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3676:1998, Aerospace series Inserts, thin wall, self-locking Design standard EN 3913, Aerospace series Insert, thin wall, self-locking, short, in heat resisting n
19、ickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), silver plated on internal thread, for salvage of components EN 3914, Aerospace series Insert, thin wall, self-locking, long, in heat resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), silver plated on internal thread, for salvage of c
20、omponents EN 3915, Aerospace series Insert, thin wall, self-locking, MJ threads, in heat resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), for salvage of components Classification: 1 275 MPa (at ambient temperature) / 550 C Technical specification ISO 965-1, ISO general-purpose metric
21、screw threads Tolerances Part 1: Principles and basic data ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts 3 Conditions of use 3.1 After reclamation, assemblies shall conform to the dimensional requirements of their respective Engineering Drawings. 3.2 Table 1 shows the
22、values for the maximum out of position as applied to the theoretical centreline of the original hole. In practice this is a cylinder of diameter x,xx applied down the theoretical centreline of the original hole. If the actual position of the hole centreline falls outside the perimeter of this cylind
23、er, the hole cannot be reclaimed. 3.3 Salvage using oversize inserts is only possible if the Boss thickness for component salvage has been used in the original design (see EN 3676:1998, Table 6). 3.4 The reclamation facility shall at this stage investigate the component Engineering Drawings to check
24、 that the operations detailed and controlled by sections 4 and 5 will not cause a further non conformance of the component. Table 2 demonstrates that 2 types of oversize insert can be used i.e. long or short. Before commencing reclamation, the original Engineering Drawings shall be checked to establ
25、ish which type of standard insert has been used i.e. long or short. The replacement oversize insert and accompanying dimensions from this specification shall correspond with it, i.e. short for short, long for long. BS EN 3916:2008EN 3916:2008 (E) 5 Only one reclamation is possible using the oversize
26、 insert method for any one hole. Further non conformance occurring to the oversize insert hole cannot be rectified using this method. 3.5 Performance: It should be noted that the salvage inserts conforming with EN 3915 give 10 reuses at 550 C. Table 1 Dimensions in millimetres Standard insert intern
27、al thread size Maximum out of position of the original hole (regardless of feature size) MJ50,8-4H6H 0,5 MJ61-4H5H 0,5 MJ71-4H5H 0,5 MJ81-4H5H 0,5 MJ101,25-4H5H 0,5 4 Re-machining of an existing insert hole 4.1 The existing threaded portion of the insert hole shall be completely removed by using a c
28、orrectly aligned cutter (see Figure 1). 4.2 The cutter used shall enable the modified minor diameter B listed within Table 3 to be produced. 4.3 The old counterbore and serrations will be removed when the new counterbore is machined. 4.4 In the case of the original insert hole being out of position,
29、 the manufacture shall ensure that the new oversize insert hole is machined in its correct position, see 3.2 and Table 1. EXAMPLE Figure 1 BS EN 3916:2008EN 3916:2008 (E) 6 5 Insert and tapped hole particulars 5.1 Table 2 provides details of the oversize insert part numbers in relation to the bolt t
30、hread diameter and insert lengths. Table 2 Dimensions in millimetres Length Length Bolt thread diameter Short insert 0,3 Long insert 0,3 MJ50,8-4h6h EN 3913-050 8,2 EN 3914-050 13,75 MJ61,0-4h6h EN 3913-060 9,5 EN 3914-060 15,95 MJ71,0-4h6h EN 3913-070 11,5 EN 3914-070 18,35 MJ81,0-4h6h EN 3913-080
31、13,4 EN 3914-080 20,75 MJ101,25-4h6h EN 3913-100 16,8 EN 3914-100 25,45 5.2 Table 3 and Figure 2 provide the necessary information for tapped holes to receive oversize thin wall inserts. The counterbore depth D1applies when oversize inserts are to be installed into light alloy components and prebroa
32、ching is not required. Counterbore depth D2(refer to Figure 3 and Table 4) applies when oversize inserts are to be installed into hard materials, i.e. steels, nickel and titanium alloys, and the counterbore will need to be prebroached. Table 3 Dimensions in millimetres A B bC D1 cD2M G H Thread Mino
33、r Chamfer Hole diameter code Length code aAssociated bolt thread max. min. max. min. 0,13 0,13 max. min. 0,25 L 2,59 14,8 17,95 050 S MJ50,8-4h6h MJ91,0-4H5H 8,2 8,1 9,1 9,0 2,97 10,03 9,25 12,4 L 3,00 17,0 20,15 060 S MJ61,0-4h6h MJ101,0-4H5H 9,24 9,11 10,13 10,0 3,38 11,02 10,50 13,7 L 3,00 19,4 2
34、2,55 070 S MJ71,0-4h6h MJ111,0-4H5H 10,29 10,16 11,13 11,0 3,38 12,04 12,50 15,7 L 3,00 21,8 24,95 080 S MJ81,0-4h6h MJ121,0-4H5H 11,29 11,16 12,13 12,0 3,38 13,00 14,40 17,6 L 3,51 26,5 29,65 100 S MJ101,25-4h6h MJ141,0-4H5H 13,32 13,17 14,15 14,0 3,89 15,06 17,80 21,0 aLength code L for long inser
35、ts (EN 3914 series), code S for short inserts (EN 3913 series). bModified Minor diameter. cSee 5.2. BS EN 3916:2008EN 3916:2008 (E) 7 Key 1 Thread marks on counterbore permissible 2 D1 light alloys or D2 steel, nickel and titanium alloy see 5.2 and refer to Figure 3 and Table 4. 3 Thread pitch diame
36、ter 4 2,00 min after final machining, see 3.3. 5 Example: Thread diameter A modified minor diameter thread call out: MJ101,0-4H5H modified minor diameter 9,11 to 9,24. 6 See 5.3. For all other particulars refer to parent drawing. Figure 2 5.3 Table 4 and Figures 3 and 4 give the additional informati
37、on required to produce the serrations in the counterbore for steel, nickel and titanium alloys. Serrations are required in the counterbore when oversize inserts are to be used in harder materials. These serrations are produced using a special broaching tool. BS EN 3916:2008EN 3916:2008 (E) 8 Key 1 M
38、ajor diameter of serrations 2 Serrations to be broached in counterbore using a wobble broach with the cutting tool offset by 1 to the broaching tool body 3 Thread pitch diameter aSee 5.2. Figure 3 Hole serration profile (short inserts): Table 1 and Figures 1 and 2 provide details of the insert part
39、number and associated bolt thread in relation to the serration profile in the counterbore of the installation hole. Table 4 Dimensions in millimetres Dimensions J R2Associated bolt thread Short inserts AA AB AC AD AE max. min. max. L Number of serrations MJ50,8 EN 3913-050 0,41 9,55 9,34 0,13 114,5
40、2,59 2,33 27 MJ61 EN 3913-060 0,28 10,54 10,29 82,0 3 2,74 28 MJ71 EN 3913-070 0,25 11,56 11,32 83,0 3 2,74 32 MJ81 EN 3913-080 12,52 12,29 83,3 3 2,74 33 MJ101,25 EN 3913-100 0,27 14,58 14,360,10 84,0 3,51 3,25 0,25 40 BS EN 3916:2008EN 3916:2008 (E) 9 Key 1 Serration form at this position may vary
41、 (within the profile tolerance) due to broach wear. Figure 4 6 Installation of oversize inserts 6.1. Prior to installation check that the tapped hole, counterbore and serrations (if applicable) to receive the oversize insert, are free from burrs and any foreign particles, grease, oil, etc. 6.2 Overs
42、ize inserts to be installed in aluminium or magnesium components shall be lightly smeared externally with a suitable universal jointing compound to prevent electrolytic corrosion. Care shall be taken to ensure the internal thread of the insert is not contaminated with any compound used. The relevant
43、 drying period shall be observed before installation of the oversize insert, when applying these requirements. 7 Minimum criteria for the installation and removal tools and their methods of application 7.1 The tooling and their methods of application described in this specification only show the bas
44、ic principles to be observed to achieve the satisfactory assembly and subsequent swaging or removal of the oversize thin wall inserts, and are not mandatory. 7.2 The minimum dimensional requirements provided shall be achieved, and on no account shall the design of the tools or their methods of appli
45、cation be such that damage may occur to the threads or the locking element of the oversize thin wall insert, or the component into which they are being inserted. 7.3 Always ensure the appropriate tool/insert size combinations have been chosen for either the insertion or swaging of the oversize inser
46、t to ensure the inserts correct assembly (see 8.2 and 8.3 respectively). BS EN 3916:2008EN 3916:2008 (E) 10 7.4 During the swaging operation the component into which the oversize inserts are installed shall be adequately supported to ensure no flexing or distortion occurs at the insert assembly face
47、. This particularly applies to components which are prone to flexing. 8 Assembly drive tool and swage tool 8.1 The tools and methods shown in this section for the installation, swaging and removal of thin wall inserts are only examples and are not mandatory. 8.2 Figure 5 shows an example of the driv
48、e tool configuration and Table 5 gives the relevant tool dimensions to ensure the correct tool size is used for screwing the oversize insert into the tapped hole. The driving feature will be tri-lobed but other tool features may vary depending on manufacturer. Key 1 Note: Finished shape of tri lobed
49、 feature optional Figure 5 Table 5 Dimensions in millimetres X Y N P (INT) Short insert part number Long insert part number 0,4 0,4 0,125 0,15 EN 3913-050 EN 3914-050 7,3 2,5 4,435 1,05 EN 3913-060 EN 3914-060 8,5 2,7 5,325 1,30 EN 3913-070 EN 3914-070 10,5 3,10 6,325 1,55 EN 3913-080 EN 3914-080 12,5 3,50 7,175 1,75 EN 3913-100 EN 3914-100 16,0 4,2 9,015 2,25 XN P 1 Y BS EN 3916:2008EN 3916:2008 (E) 11 8.3 Figure 6 shows an example of the swage tool configuration an
