1、BRITISH STANDARD BS EN ISO 14327:2004 Resistance welding Procedures for determining the weldability lobe for resistance spot, projection and seam welding The European Standard EN ISO 14327:2004 has the status of a British Standard ICS 25.160.10 BS EN ISO 14327:2004 This British Standard was publishe
2、d under the authority of the Standards Policy and Strategy Committee on 11 June 2004 BSI 11 June 2004 ISBN 0 580 43911 9 National foreword This British Standard is the official English language version of EN ISO 14327:2004. It is identical with ISO 14327:2004. The UK participation in its preparation
3、 was entrusted to Technical Committee WEE/29, Resistance welding, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred
4、 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 provision
5、s 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, or
6、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 ISO title page, pages 2 to 17 and a back cover. The BSI copyright not
7、ice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO14327 April2004 ICS25.160.10 Englishversion ResistanceweldingProceduresfordeterminingtheweldability lobeforresista
8、ncespot,projectionandseamwelding(ISO 14327:2004) SoudageparrsistanceModesopratoirespourla dterminationdudomainedesoudabilitpourlesoudage parrsistanceparpoints,parbossagesetlamolette (ISO14327:2004) WiderstandsschweienVerfahrenfrdasBestimmendes SchweibereichsdiagrammsfrdasWiderstandspunkt, BuckelundR
9、ollennahtschweien(ISO14327:2004) ThisEuropeanStandardwasapprovedbyCENon17December2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesco
10、ncernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretari
11、athasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,
12、SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO14327:2004:EENISO14327:200
13、4(E) 2 Contents page Foreword3 Introduction .4 1 Scope 5 2 Normativereferences 5 3 Termsanddefinitions. .6 4 Weldabilitylobelimits . 6 5 Testequipment 7 5.1 Weldingelectrodes 7 5.2 Weldingmachine. .8 6 Weldingprocedure . .8 6.1 Spotorprojectionwelding 8 6.2 Seamwelding .9 7 Statisticalevaluationofte
14、stresults 10 8 Reportoftestresults .10 Bibliography 17ENISO14327:2004(E) 3 Foreword Thisdocument(ENISO14327:2004)hasbeenpreparedbyTechnicalCommitteeCEN/TC121“Welding“,the secretariatofwhichisheldbyDIN,incollaborationwithTechnicalCommitteeISO/TC44“Weldingandallied processes“. This EuropeanSt andard s
15、hall be giventh e status of a nationalst andard, either by publication ofaniden ticaltextor byendorsement,atthelatestbyOctober2004,andconflictingnationalstandardsshallbewithdrawnatthe latest by October 2004. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing
16、 countriesareboundtoimplementthisEuro peanStandard:Austria,Belgium,Cyprus,CzechRepublic,Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,P oland,Port ugal,Sl ovakia,Slov enia,S pain, Sweden,Swi tzerlandandU
17、nitedKin gdom.ENISO14327:2004(E) 4 Introduction ThisEuropeanStandardenablestheweldabilitylobetobedeterminedforresistancespot,projectionandseam welding.Thisstandarddoesnotinvalidateproceduresforthedeterminationoftheweldabilitylobeortheirapproval documentsincurrentusewhichcompliedwiththenationalorInte
18、rnationalStandardsorregulationsexistingatthat time,providedtheintentofthetechnicalrequirementissatisfiedandthespecifiedapplication,itsperformanceand equipmentwithwhichitisperformedremainunchanged. Whenthisstandardisreferencedforcontractualpurposes,allquestionsrelatingtothespecificationand implementa
19、tionofweldingproceduresshouldbeagreedbetweenthecontactingpartiesatthetimeofenquiryorat thecontractstage. Ithasbeenassumedinthisstandardthattheexecutionofitsprovisionsisentrustedtoappropriatelytrained,skilled andexperiencedpersonnel. ForthequalityofweldedstructurestherelevantpartofENISO14554shouldbea
20、pplicable.Thespecificationof proceduresshouldfollowguidelinesasinENISO156095.ENISO14327:2004(E) 5 1Scope ThisEuropeanStandardspecifiesproceduresfordeterminingtheweldabilitylobeforproducingqualitywelds.The testsareusedinparticulartodeterminetheweldabilitylobeforcoated/uncoatedsteels,stainlesssteelsan
21、d aluminiumanditsalloysbutmayalsobeusedforothermetallicmaterials. Theaimofthisprocedureistoallowdeterminationoftherangeofweldingparameterswhichgiverisetoan acceptableweldqualityasdefinedwithinpreciselimits.Theprocedurecanbeusedtodetermine: a) Theinfluenceofelectrodematerial,electrodeshapeanddimensio
22、nsontheavailableweldingrangefora particularmaterialandweldingmachine. b) Theinfluenceofmaterialtypeandthicknessontheavailableweldingrangewhenusingaparticularcombination ofweldingelectrodesandweldingmachine. c) Theinfluenceofweldingmachinetype,orelectrodecoolingontheavailableweldingrangeforaparticula
23、r materialusingaparticularelectrodeshape. d) Theavailableweldingrangeinaproductionsituation. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedher
24、eafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). ENISO14329:2003, Resistancewelding Destructivetes
25、tsofwelds Failuretypesandgeometric measurementsforresistancespot,seamandprojectionwelds(ISO14329:2003). ENISO156095:2004, Specificationandqualificationofweldingproceduresformetallicmaterials Welding procedurespecificationPart5:Resistancewelding(ISO1 56095:2004). ISO669:2000, ResistanceweldingResista
26、nceweldingequipmentMechanicalandelectricalrequirements. ISO693, Dimensionsofseamweldingwheelblanks. ISO5182, WeldingMaterialsforresistanceweldingelectrodesandancillaryequipment. EN25184, Straightresistancespotweldingelectrodes(ISO5184:1979). EN25821, Resistancespotweldingelectrodecaps(ISO5821:1979).
27、 ISO5830, ResistancespotweldingMaleelectrodecaps. EN28167, Projectionsforresistancewelding(ISO8167:1989). ISO/DIS14373, ResistanceweldingProcedureforspotweldingofuncoatedandcoatedlowcarbonsteels.ENISO14327:2004(E) 6 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiv
28、eninISO 669:2000and ENISO14329:2003,andthefollowingapply. NOTE FurtherdefinitionsaregiveninISO/DIS176571(seeBibliography) weldabilitylobe weldingcurrentdomainallowingtheproductionwithoutsplashofspotweldsofadiameterequalormorethana predeterminedvalueundereitherconstantweldingtimeorconstantelectrodefo
29、rce 4 Weldabilitylobelimits Theweldabilitylobewilldefinetheavailableweldingconditionsintermsof: a) Weldcurrentandtimeataconstantelectrodeforce.Or: b) Weldcurrentandelectrodeforceataconstantweldtime. Inthecaseofresistanceseamwelding,weldingspeed(m/min)isusedinsteadofweldtime. Tomeettheserequirements,
30、theweldabilitylobescanbeatwodimensionalplotasindicatedina)andb)aboveora threedimensionalplotindicatingtheinterrelationshipbetweenweldtime(weldingspeedinthecaseofseam welding),weldingcurrentandelectrodeforce. Forthepurposeofthisstandard,thelowerandupperlimitsoftheweldabilitylobeshouldbeasfollows: 1)
31、LowerlimitThisequatestotheweldingconditionswhichresultinawelddiameterequalto3,5 twhere tequal sheetthicknessinmm.Inthecaseoftwodissimilarthicknesses,“ t“referstothethinnersheet. NOTE1 Alimitotherthan3,5 tmaybeacceptablebyagreementbetweencontractingpartiesprovidedthestrengthoftheweld orweldedassembly
32、satisfythenecessarydesignrequirements. NOTE2 GuidelinesformeasuringwelddiameterforbothplugandinterfacefailurearegiveninENISO14329.Theweld diametershouldbemeasuredfromabrokenspecimen,e.g.peeltest. NOTE3 In3or4thicknessweldingtheminimumofthediameterspecifiedwilldependonthepositionofthethinnersheets fr
33、omdesignprocessrequirements. 2) UpperlimitThiscorrespondstotheweldingconditionswhichgiverisetointerfacialsplashinthecaseofspot andprojectionwelding.Inseamweldingthelimitcorrespondstosurfacesplashorsurfacecrackingintheweldor heataffectedzoneareas. NOTE4 Alternativecriteriamaybespecified,suchasthemini
34、mumvalueoftheshearforcethattheweldcanwithstandbased onrecommendationsmadeinISOorproductstandardsinthecaseofcoated/uncoatedsteels.Minimumsurfaceindentationorthe amountofweldnuggetpenetrationcanbespecifiedbyagreement. Inthecaseofresistanceseamwelding,otherintermediatelimitsmaybechosenbasedonalternativ
35、eweldsizesor theonsetofsurfacecracking.Theuseofsuchlimitsdependontheapplicationbeingweldedandshouldbeby agreementbetweencontractingparties. TypicalweldabilitylobesareshowninFigure1.ENISO14327:2004(E) 7 5 Testequipment 5.1 Weldingelectrodes 5.1.1 General Theweldingelectrodesshallconformtoalloysspecif
36、iedinISO5182unlessotherwiseagreedbetweencontracting parties.Electrodesshouldbeofsufficientcrosssectionalareaandstrengthtocarrytheweldingcurrentandelectrode forcewithoutoverheating,deformationorexcessivedeflection. 5.1.2 Spotwelding Inthecaseofspotwelding,theelectrodedimensionsshallconformtotherequir
37、ementsofISO5184,ISO5821and ISO5830whereapplicable.Alternativeelectrodeshapesanddimensionsmaybeusedbyagreementbetween contractingparties.Preconditionedelectrodesshouldbeusedforeachindividualweldabilitylobedetermined. Electrodesshallbepreconditionedassummarisedbelow.Whereappropriate,dimensionsofthewat
38、ercooling holesandpipesshallcomplywiththerelevantrequirementsoftheappropriateISOstandard. NOTE Itisrecommendedthatthewaterflowshouldbeaminimumof4l/minperelectrodealthough,higherflowratesare recommendedwhenweldingcoatedsteels.Thewatercoolingfeedtubeshouldbearrangedtoimpingethewaterontotheback faceoft
39、heelectrode.Thedistancebetweenthebackandtheworkingfaceoftheelectrodeshouldnotexceedthevaluesgiveni n theappropriateISOstandard.Separatewatersuppliesshouldbeusedfortopandbottomelectrodesandshouldbeindependentof othercoolingcircuits.Itisrecommendedthattheinletwatertemperatureshouldnotexceed20 C(293 K)
40、andtheoutlet temperatureshouldnotexceed30 C(303K)(exceptwhenwatercoolingtemperatureistheparameterbeingstudied).Higher inlet/outletwatertemperaturescanbeusedbyagreementbetweencontractingparties. Bothtopandbottomelectrodesshallbeproperlyalignedpriortocommencementofthetest.Theelectrodefaceofthe topandb
41、ottomelectrodesshouldbeparalleltoeachotherandhaveanelectrodediameterthatiswithinthespecified tolerancesofthediametercalledforanygivensheetthicknessorthatagreedbetweenthecontractingparties. Alignmentofelectrodesshouldbecheckedusingcarbonimprints. Whenweldinguncoated/coatedsteelsandstainlesssteels,the
42、weldingelectrodesshouldbepreconditionedfor 50weldspriortodeterminingtheweldabilitylobe.Preconditioningshouldbecarriedoutatanominalweldtimeof approximatelye.g.8cyclesat50Hzonuncoatedsheetsinthesamematerialandwiththesamethickness.Forpre conditioningaweldingcurrentequaltothatwhichgivesastuckweldconditi
43、onoraweldofdiameterequalto3 t shouldbeused.Whenweldingaluminiumandaluminiumalloys,preconditioningofelectrodesshouldnotbecarried out. 5.1.3 Seamwelding Inthecaseofwidewheelseamwelding,theelectrodefacedimensionsshallconformwiththerequirementsof ISO693andfollowsimilarcriteriaasusedforspotwelding,i.e.treadwidthequal5 t.However,forthinwheelseam welding,alternativeelectrodedimensions,i.e.electrodethicknessandfacedimensions,maybeusedbyagreement betweencontractingparties.Theweldingwheelsshouldbepreconditi
