1、BRITISH STANDARD AEROSPACE SERIES BS EN 4585:2003 Clips, spring tension Technical specification The European Standard EN 4585:2003 has the status of a British Standard ICS 49.030.50 BS EN 4585:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee
2、 on 10 March 2003 BSI 10 March 2003 ISBN 0 580 41404 3 National foreword This British Standard is the official English language version of EN 4585:2003. The UK participation in its preparation was entrusted by Technical Committee ACE/12, Aerospace fasteners and fastening systems, to Subcommittee ACE
3、/12/1, Aerospace fasteners and fastening systems (international) which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referr
4、ed to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or 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 provisi
5、ons of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, o
6、r proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The BSI copyright date
7、displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN4585 February2003 ICS49.030.50 Englishversion AerospaceseriesClips,springtensionTechnicalspecification ThisEuropeanStanda
8、rdwasapprovedbyCENon1November2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplic
9、ationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersare
10、thenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,SlovakRepublic,Spain,Sweden,Switzerland and UnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROP
11、ISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN4585:2003EEN4585:2003(E) 2 Contents Foreword3 1 Scope 3 2 Normativereferences 3 3 Termsanddefinitions. .4 4 Qualityassurance .
12、.6 4.1 Qualification .6 4.2 Acceptance.6 5 Requirements .7 AnnexA (normative) Installationandremovalofthemandrel12 AnnexB (informative) Retentionresistancetestbench.13EN4585:2003(E) 3 Foreword ThisdocumentEN4585:2003hasbeenpreparedbytheEuropeanAssociationofAerospaceManufacturers (AECMA). Afterenquir
13、iesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhasreceived theapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountriesofAECMA,priortoits presentationtoCEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltext
14、or byendorsement,atthelatestbyAugust2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby August2003. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finlan
15、d, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, SlovakRepublic,Spain,Sweden,SwitzerlandandUnitedKingdom. 1Scope Thisstandardspecifiesthecharacteristics,qualificationandacceptancerequirementsforspringtensionclipsfor thesupportofelectricalharnesses,
16、inalloysteelforaerospaceapplications. Itisapplicablewheneverreferenced. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedrefer
17、ences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). ISO28591 SamplingproceduresforinspectionbyattributesPart1:Samplingsche
18、mesindexedbyacceptance qualitylimit(AQL)forlotbyIotinspection. ISO3452 NondestructivetestingPenetrantinspectionGeneralprinciples. ISO3534 StatisticsVocabularyandsymbols. ISO4288 GeometricalproductSpecifications(GPS)Surfacetexture:ProfilemethodRulesandprocedures fortheassessmentofsurfacetexture. EN91
19、33 AerospaceseriesQualitymanagementsystemsQualificationprocedureforaerospacestandard parts. TR4586 AerospaceseriesClips,springtensionDesignrecommendations 1) . 1) PublishedasAECMATechnicalRepor1atthedateofpublicationofthisstandardEN4585:2003(E) 4 TR4587 AerospaceseriesClips,springtensionAssemblyreco
20、mmendations 1) . 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 batch quantityoffinishedspringclips,ofthesametypeandsamediameter,producedfromamaterialobtainedfromthe samemelt,manufacturedinthecourseofthesameproductioncycle,followingthesamemanufac
21、turingrouteand havingundergonealltherelevantheattreatmentsandsurfacetreatments 3.2Surface discontinuities 3.2.1 crack ruptureinthematerialwhichmayextendinanydirectionandwhichmaybeintercrystallineortranscrystallinein character 3.2.2 seam opensurfacedefect 3.2.3 lap surfacedefectcausedbyfoldingovermet
22、alfinsorsharpcornersandthencompressingthemintothesurface 3.2.4 inclusions nonmetallicparticlesoriginatingfromthematerialmanufacturingprocess.Theseparticlesmaybeisolatedor arrangedinstrings. 3.3 testtemperature ambienttemperature,unlessotherwisespecified 3.4 simplerandomsampling takingof nitemsfromap
23、opulationof Nitemsinsuchawaythatallpossiblecombinationsof nitemshavethe sameprobabilityofbeingchosenEN4585:2003(E) 5 3.5 criticaldefect defectthat,accordingtojudgementandexperience,islikelytoresultinhazardousorunsafeconditionsfor individualsusing,maintaining,ordependingupontheconsideredproduct,ortha
24、tislikelytopreventperformanceof thefunctionofamajorenditem 3.6 majordefect defectotherthancritical,thatislikelytoresultinafailureortoreducemateriallytheusabilityoftheconsidered productforitsintendedpurpose 3.7 minordefect defectthatisnotlikelytoreducemateriallytheusabilityoftheconsideredproductforit
25、sintendedpurpose,orthat isadeparturefromestablishedspecificationhavinglittlebearingontheeffectiveuseoroperationofthisproduct 3.8 samplingplan planaccordingtowhichoneormoresamplesaretakeninordertoobtaininformationandpossiblytoreacha decision 3.9 limitingquality inasamplingplan,thequalitylimitwhichcor
26、respondstothespecified10%probabilityofacceptance 3.10 acceptancequalitylimit(AQL) qualitylimitwhichinasamplingplancorrespondstoaspecifiedbutrelativelyhighprobabilityofacceptance Itisthemaximumpercentdefective(orthemaximumnumberofdefectsperhundredunits)that,forpurposesof samplinginspectioncanbeconsid
27、eredsatisfactoryasaprocessaverage 3.11 retentionresistance minimumradialforcesthatthespringclipshallopposetotheremovaloftheretainedpart 3.12 griprange allharnessnominaldiameterswhichcanberetainedbyaspringclipsizeEN4585:2003(E) 6 4Quality assurance 4.1Qualification EN9133 Qualificationinspectionsandt
28、ests(requirements,methods,samplesize)arespecifiedinTable1.Theyshallbe carriedouton: eachtypeandsizeofspringclip; 5springclipsselectedfromasinglebatchbysimplerandomsampling. Thetestprogrammemaypossiblybereduced,orthequalificationbegrantedwithoutinspectionortesting:any suchdecisionshallbebasedontheres
29、ultsobtainedonsimilartypesanddiametersofspringclipsprovidedthat thedesignandmanufacturingconditionsareidentical.Itshallbeclearlyidentifiedonthetestreport. Table2indicatestheallocationofspringclipsamplesfortheinspectionsandtests. 4.2Acceptance 4.2.1Purpose Thepurposeofacceptanceinspectionsandtestsist
30、ocheck,assimplyaspossible,byamethodrepresentativeof actualuseconditions,withtheuncertaintyinherenttostatisticalsampling,thatthespringclipsconstitutingthe batchsatisfytherequirementsofthisstandard. 4.2.2Conditions Acceptanceinspectionsandtests(requirements,methods,numbersofspringclips)arespecifiedinT
31、able1.They shallbecarriedoutoneachbatch.Springclipsfromthebatchtobetestedshallbeselectedbysimplerandom sampling. Eachspringclipmaybesubmittedtoseveralinspectionsortests. Ifamorestringentinspectionisdeemednecessary,allorpartofthequalificationinspectionsandtestsmaybe performedduringtheacceptanceinspec
32、tionandtesting.Inthiscase,thenumberofspringclipssubmittedtothese inspectionsandtestsisthesameasthatsubmittedforqualificationinspectionandtests. 4.2.3Responsibility Acceptanceinspectionsandtestsshallbecarriedoutbythemanufacturer,orunderhisresponsibility. 4.2.4 Inspectionandtestreport Atestreportshowi
33、ngactualnumericalvaluesshallbeprovidedifspecifiedinthepurchaseorder.EN4585:2003(E) 7 5Requirements SeeTable1. Table1Technicalrequirementsandtestmethods Clause Characteristic Requirement Inspectionandtestmethod Q/A a Samplesize Q 5.1 Material Inaccordancewiththeproduct standardordefinitiondocument Ch
34、emicalanalysisor certificateofcomplianceissued bythemanufacturerofthesemi finishedproduct A Q5 5.2 Dimensions, tolerancesof formand position Inaccordancewiththeproduct standardordefinitiondocument Standardgauging Cautionshallbetakenbecause somemeasurementsshouldbe madeunderstresscondition . A Tables
35、3and4 5.3 Manufacturing Q1 5.3.1 Surface roughness Inaccordancewiththeproduct standardordefinitiondocument ISO4288 Visualexamination A Tables3and4 Q5 A Tables3and4 5.3.2 Surface discontinuities Springclipsshallbefreefrom surfacedefectsindicatedin 3.2liabletohaveanadverse affectontheircharacteristics
36、 andendurance. Cracksarenotpermitted. ISO3452 Intheeventofanydoubtarising astothenatureofthedefects detected,inspectspringclips underlowmagnificationafter sectioning Q5 5.3.3 Surface coating Inaccordancewiththe productstandardordefinition document Seeapplicablecoatingstandard A Tables3and4 5.4 Mecha
37、nical properties 5.4.1 Mandrel assemblyfor mechanical properties tests Springclipsshallbeinstalledby themethodgiveninTR4587on theupperhorizontalsurfaceofa testblockdesignedin accordancewithTR4586. Unlessotherwisespecified,the installedspringclipsshallbe testedindividuallywitha stainlesssteelmandrelh
38、avinga surfaceroughness Ra=1,6per ISO4288withadiameterequal tothemaximumvalueofthegrip rangegivenintheproduct standardordefinitiondocument. Themandrelshallbeinstalled radiallyintothespringclip(see annexA,normative). NOTEAtubemayalsobeused insteadofamandrelforthetest. continuedEN4585:2003(E) 8 Table1
39、 (continued) Clause Characteristic Requirement Inspectionandtestmethod Q/A a Samplesize 5.4.2 Corrosion resistance Metallicspringclipsshall withstandthiscorrosionwithout anyofthefollowingdefects afterthecompletionofthe mechanicalpropertytests: indicationsofcracksorpitting whenvisuallyexaminedat10 ti
40、mesmagnification; indicationofintergranularor transgranularcorrosiveattack duringmetallurgical examinationoftransversal sectionsofthespringclip. Themandrelshallbefittedinto thespringclipsforthistest accordingto5.4.1. Thetestblockshallthenbe immersedina(3,5 0,1)% sodiumchloride(NaCl)aqueous solutionf
41、or8to10minat ambienttemperature. Theassemblyshallthenbe removedfromtheaqueous solutionanddriedinairat ambienttemperatureforthe remainderof1h. Thissubsequentimmersionand dryingprocessshallberepeated toatotalof50cycles. NOTETheNaClsolutionshould containadrybasisofnomore than0,1%ofsodiumiodideand 0,5%o
42、ftotalimpurities. Q5 5.4.3 Retention resistance Springclipsshallmeetthe retentionresistancegivenin Figure1. Themandrelshallbeinstalled intothespringclipsforthistest accordingto5.4.1. Theretentionresistanceshall beverifiedusingasuitable calibratedtensiletestmachine withtheappropriateloadcell fitted.T
43、heloadcellshallbe firmlyattachedtothemandrel inordertogettheretention forceverticallyintheplaneof symmetryofthespringclip. Exampleofsuchtestbenchis giveninannexB,informative. Q5 5.4.4 Reusability Springclipsshallmeetthe retentionresistancegivenin Figure1. Cracksarenotpermittedonthe springclipsafterthistest. Themandrelshallbeinstalled intothespringclipsforthistest accordingto5.4.1. Thetestblockshallthenbeput inanovenandbemaintained atthemaximumoperating temperaturegivenbyproduct standardordefinitiondocument withatoleranceof 10Cfor atleast1h. Theassemblyshallthenbe remov
