1、BRITISH STANDARD AEROSPACE SERIESBS EN 4459:2005Studs, in titanium alloy TI-P64001, with serrated locking ring in corrosion resisting steel Design standardThe European Standard EN 4459:2005 has the status of a British StandardICS 49.030.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g
2、44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 4459:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 2 December 2005 BSI 2 December 2005ISBN
3、0 580 47329 5National forewordThis British Standard is the official English language version of EN 4459:2005.The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, which has the responsibility to: A list of organizations repres
4、ented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, o
5、r by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer imm
6、unity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in
7、 the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN ST
8、ANDARDNORME EUROPENNEEUROPISCHE NORMEN 4459October 2005ICS 49.030.20English VersionAerospace series - Studs, in titanium alloy TI-P64001, withserrated locking ring in corrosion resisting steel - DesignstandardSrie arospatiale - Goujons, en alliage de titane TI-P64001, avec bague de verrouillage dent
9、ele en acierrsistant la corrosion - Norme de conceptionLuft- und Raumfahrt - Stiftschrauben, aus TitanlegierungTI-P64001, mit Ringsicherung aus korrosionsbestndigemStahl - KonstruktionsnormThis European Standard was approved by CEN on 26 September 2005.CEN members are bound to comply with the CEN/CE
10、NELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any C
11、EN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN memb
12、ers are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and Unite
13、d Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4459:2005: E2 Con
14、tents Page Foreword 3 1 Scope .4 2 Normative references .4 3 General 5 4 Required characteristics 7 5 Installation.9 6 Provisions for component salvage10 7 Designation .10 8 Drawing presentation .11 EN 4459:2005 3 Foreword This European Standard (EN 4459:2005) has been prepared by the European Assoc
15、iation of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries 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 pres
16、entation 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 the latest by April 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. Attention is drawn to the possibilit
17、y that some of the elements of this document may be the subject of patent rights. CEN and/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 bou
18、nd to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the
19、United Kingdom. EN 4459:2005 4 1 Scope This standard specifies the use and installation hole dimensions for EN standard studs, in TI-P64001, with serrated locking ring in corrosion resisting steel, for aerospace applications and provisions for component salvage. 2 Normative references The following
20、referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for b
21、olts and nuts. EN 4421, Aerospace series Studs, in titanium alloy TI-P64001, MoS2coated, with serrated locking ring in corrosion resisting steel Strength class: 1 100 MPa (at ambient temperature). 1)EN 4460, Aerospace series Studs, in titanium alloy TI-P64001, with serrated locking ring in corrosion
22、 resisting steel Installation and removal procedure. 1) Published as AECMA Prestandard at the date of publication of this standard. EN 4459:2005 5 3 General 3.1 Description See Figure 1. Key 1 Nut end threads 2 Locking ring 3 Serrated collar 4 Installation end threads 5 Same thread diameter on both
23、ends Figure 1 3.2 Installation The studs are placed in their hole by hand (see Figure 2). Rotational movement of the studs is prevented by installing the locking ring. This ring mates with the serrated collar on the stud and forms its housing in the casing, thus securing the stud. For installation i
24、n hard materials, ring housing shall mandatorily be presserrated. The assembly thus made is inseparable, disassembly can only be achieved by destroying the locking ring and the stud. EN 4459:2005 6 Key 1 Ring installed Figure 2 3.3 Use Studs can be used: in various “soft“ materials such as light all
25、oys and “hard“ materials such as nickel or titanium alloys; in blind or through tapped holes, as shown on Figures 3 and 4; with MJ thread nuts in accordance with ISO 5855-2. On nut end, stud lengths are incremented to enable optimum installation for different grip thicknesses. Key 1 1,5 pitches min
26、2 1,5 pitches max Key 1 Flange 2 Receiving part Figure 3 Figure 4 EN 4459:2005 7 3.4 Recommendations Studs to EN 4421: maximum operating temperature is 350 C; it is not designed to take shear loads; it shall not be used on rotating parts; for installing studs in light alloys, prebroaching of tapped
27、hole is optional. Correct stud installation shall be checked (by tests). 4 Required characteristics See Figures 5 and 6 and Table 1. 4.1 Holes Dimensions in millimetres Key 1 Bearing face aDiameter M : spotfacing is recommended for installation in aluminium alloys to prevent the bearing face from sw
28、elling Figure 5 Key 1 Thread pitch diameter 2 Normal boss 3 Repair-size bossaC = minimum completely formed thread length bE = C + 3 pitches, require manual tapping cE1= C + 5 pitches, minimum length for machine tapping dT = minimum hole centerline to part edge distance for installation eY = calculat
29、ed on following basis: Y = 0,002 C fDiameter G min. = 2 T gDiameter G1min.: there are no oversized studs for repair, diameter G1shall be sized for the type of repair considered at design stage Figure 6 EN 4459:2005 8 Table 1 Dimensions in millimetres A B C E E1F M T Y Diameter code aInstallation thr
30、ead b+ 0,1 0 + 0,5 0 min. + 1 0 + 1 0 min. + 0,20 Steel/Titaniummin. Aluminium min. 050 MJ50,8-4H6H 7 2,6 10,3 12,7 13,5 4,5 9 5 6 0,023 060 MJ61-4H5H 8 3,3 12,5 15,5 17,5 5 10 6 7 0,028 aThe diameter code is suffixed with an S for serrated holes, see 4.2. bIn accordance with ISO 5855-2. 4.2 Serrati
31、on Figure 7 shows a serrated hole. Serration are to be made according to the hardness of the material; dimensions and profiles are defined in accordance with EN 4460 using a broach installed on a hand or machine tool as shown on Figures 8 and 9 and in Table 2. Sufficient space shall be provided arou
32、nd each hole to allow access for the broaching tool, see Figure 7. Key 1 Serrations Figure 7 EN 4459:2005 9 Dimensions in millimetres Key 1 Broach 2 Pilot Figure 8 Hand tool Key 1 Clearance: 2 min Figure 9 Machine tool Table 2 Broaching tool Nut end thread diameterA L 5 79 6 15,8 81 5 Installation I
33、nstallation of the stud shall be in accordance with EN 4460. Determining grip thicknesses: see Figure 10. EN 4459:2005 10 Key 1 1,5 pitches = minimum protruding length of the stud end from the nut X = distance between the bearing face and the first completely formed thread of the stud A = grip lengt
34、h A min. = X max. A max. = L min. (1,5 pitches + H max.) H = height of nut L = distance between the bearing face and the stud end. This value corresponds to length L in product standard. Figure 10 6 Provisions for component salvage When studs are selected for a design, consideration shall be given t
35、o the feasibility of component salvage where the original hole could be damaged during manufacture, or where the hole is machined out of position. Before provision is made for component salvage, consideration shall be given to component cost/mass requirements, e.g. for an inexpensive component salva
36、ge may not be an economic proposition, whereas an expensive component may necessitate salvage. Where provision for salvage is made, the component will be heavier because of the increase in wall thickness around the tapped holes. 7 Designation EXAMPLE EN4459-050-S Number of this standard Diameter cod
37、e (see Table 1) Serration code (see Table 1) EN 4459:2005 11 8 Drawing presentation 8.1 Definition drawing EXAMPLE see Figures 11 and 12. Key 1 Hole EN4459-060 Key 1 Hole EN4459-060-S Alternatively, the hole may be fully dimensioned on the drawing. Figure 11 Shear hole Figure 12 Serrated hole 8.2 As
38、sembly drawing EXAMPLE see Figure 13. Key 1 Stud EN4421-060 2 Installation EN4460 Figure 13 EN 4459:2005 BS EN 4459:2005BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on s
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