Resistance spot welding

ProcessesDescriptionResistanceSpotWelderResistanceSpotWelding003335AJuly2005Visitourwebsiteat’sinstructions.Alwaysbecertainthatworkareasarecleanandsafeandthatproperventilationisused.Misuseofequipment,andfailuretoobserveapplicablecodesandsafepractices,canresultinseriouspersonalinjuryandpropertydamage.ARCWELDINGcanbehazardous.TABLEOFCONTENTSSECTION1−SAFETYPRECAUTIONS-READBEFOREUSING1................................1-1.SymbolUsage1.......................................................................1-2.ResistanceSpotWeldingHazards1......................................................1-3.AdditionalSymbolsForInstallation,Operation,AndMaintenance2............................1-4.CaliforniaProposition65Warnings2......................................................1-5.PrincipalSafetyStandards2............................................................1-6.EMFInformation2.....................................................................SECTION2−CONSIGNESDESÉCURITÉ−LIREAVANTUTILISATION3..........................2-1.Significationdessymboles3............................................................2-2.Dangersliésausoudageparpoints3.....................................................2-3.Dangerssupplémentairesenrelationavecl’installation,lefonctionnementetlamaintenance4.....2-4.Principalesnormesdesécurité4.........................................................2-5.Informationsurleschampsélectromagnétiques4...........................................SECTION3−INTRODUCTION5...............................................................SECTION4−FUNDAMENTALSOFRESISTANCESPOTWELDING6..............................4-1.Principle6............................................................................4-2.HeatGeneration6.....................................................................4-3.TheTimeFactor7.....................................................................4-4.Pressure7...........................................................................4-5.ElectrodeTips7.......................................................................4-6.PracticalUsesOfResistanceSpotWelding8..............................................4-7.ElectrodeTipSize8....................................................................4-8.PressureOrWeldingForce9............................................................4-9.MiscellaneousData9..................................................................4-10.HeatBalance9........................................................................4-11.SurfaceConditions10...................................................................4-12.MaterialsDataForResistanceSpotWelding10........................................................................4-13.MildSteel10...........................................................................4-14.LowAlloyAndMediumCarbonSteels11...................................................4-15.StainlessSteels11.....................................................................4-16.Steels,DipCoatedOrPlated11..........................................................4-17.AluminumAndAluminumAlloys11........................................................4-18.Summary12...........................................................................4-19.TestProcedures12.....................................................................SECTION5−MAINTENANCEANDTROUBLESHOOTING13......................................5-1.Maintenance13........................................................................5-2.DressingTips13.......................................................................5-3.Troubleshooting14.....................................................................UG-003335Page1SECTION1−SAFETYPRECAUTIONS-READBEFOREUSINGspotom_nd_8/031-1.SymbolUsageMeansWarning!WatchOut!Therearepossiblehazardswiththisprocedure!Thepossiblehazardsareshownintheadjoiningsymbols.Marksaspecialsafetymessage.Means“Note”;notsafetyrelated.ThisgroupofsymbolsmeansWarning!WatchOut!possibleELECTRICSHOCK,MOVINGPARTS,andHOTPARTShazards.Consultsymbolsandrelatedinstructionsbelowfornecessaryactionstoavoidthehazards.1-2.ResistanceSpotWeldingHazardsThesymbolsshownbelowareusedthroughoutthismanualtocallattentiontoandidentifypossiblehazards.Whenyouseethesymbol,watchout,andfollowtherelatedinstructionstoavoidthehazard.ThesafetyinformationgivenbelowisonlyasummaryofthemorecompletesafetyinformationfoundintheSafetyStandardslistedinSection1-5.ReadandfollowallSafetyStandards.Onlyqualifiedpersonsshouldinstall,operate,maintain,andrepairthisunit.Duringoperatio