Arc Welding Basics - 焊接基础

ArcWeldingBasics2UnitTopics•Topicsincludedinthisovervieware:–IntroductionWhatisArcWelding?WhyisWeldingImportant?WhyLearntoWeld?–CareersinWelding–TheAmericanWeldingSociety(AWS)–WeldingSafety–BasicElectricity–WeldingFundamentals–WeldingCertification3Objectives•Uponsuccessfulcompletionofthisunitofstudy,youwillbeableto…–Identifydefinitionsandterminologyassociatedwithwelding–Demonstratesafeworkinghabitsintheweldingenvironment–Namethepartsandtypesofweldsandweldjoints–Interpretbasicweldingsymbolinformation–IdentifyopportunitiesavailabletoweldersIntroduction5WhatisArcWelding?•Arcweldingismostcommonlyusedtojointwopiecesofmetal–Theweldercreatesanelectricarcthatmeltsthebasemetalsandfillermetal(consumable)togethersothattheyallfuseintoonesolidpieceofmetalSteelPipe–TackWeldedRootPassor“StringerBead”Finalweldafterseveralbeadsaremade6WhyisWeldingImportant?•Manythingsaroundusarewelded…–Pipelinesthatbringfreshwater–Towersthatcarryelectricitytohouses–Carsandbusesthattakepeoplewheretheyneedtogo7WhyLearntoWeld?•WeldingissoHOT….it’sCOOL!–Weldingcanhelpbuildasuccessfulcareersoyoucangetthethingsyouwantinlife–Skilledweldersareindemand–peopleusethingsthatareweldedeveryday!–Weldingcanbefunandsafe–Itischallengingandhigh-tech8BasicStepsofArcWelding•Preparethebasematerials:removepaintandrust•Choosetherightweldingprocess•Choosetherightfillermaterial•Assessandcomplywithsafetyrequirements•Useproperweldingtechniquesandbesuretoprotectthemoltenpuddlefromcontaminantsintheair•Inspecttheweld9TheAmericanWeldingSociety•WhoistheAWS?–AmericanWeldingSociety–Itisanon-profitorganizationwhosemembershipincludes:IndividualsStudentsCompanies•Whatdotheydo?–Theirpurposeisto:Advancethescience,technology,andapplicationofweldingandalliedprocessesincluding:joining,brazing,soldering,cutting,andthermalsprayStandardizeclassificationofelectrodeandbasematerialcodesStandardizeprocessproceduresProvideweldingcertification10CareersinWelding11CareersinWelding•Engineering•Racing•IndustrialSales•FarmRepairandFabrication•ProductionWelding•Military•Teaching•Maintenance•Robotics•Ironworker/SkilledTrades•AutoTechnician•Artist•MetalSculpting•OwningYourOwnBusinessJobopportunitiesinweldingarechanging…Weldingcanbevaluableasajobskillorasafull-timejobFormoreinformationonweldingcareers,pleaseseethee-learningintroduction12HowMuchMoneyCanYouMake?•Recentstatisticsshowthatsomeweldingjobspay$25.00perhour-Ifyouworkedfivedaysaweekforoneyear,howmuchmoneywouldyoumake?•83%ofpeoplewithweldingjobswereofferedmedicalbenefits-HigherthananyotherworksectorexceptgovernmentFormoreinformationonweldingstatistics,pleaselogonto•Let’sexploresomecareerpossibilitiesinwelding•Pleaselogontoacomputer•Workingwithateammember,researchthewebsitestotherightandexploreinformationaboutweldingcareers•In60minutes,bepreparedtoanswerthefollowingquestions:–Whatcareersinweldinginterestyouthemost?–Howcanweldingbehightech?–Howmuchmoneycanbemadeannuallyinthischosencareerfield?–Wherecanyougetajobinweldingandwhatarethebasicrequirements?–Whataresomejobadvancementopportunitiesavailableintheweldingindustry?•America'sJobBank()•ClassifiedsEmployment()•Yahoo!Careers()•MONSTER.COM()()•CareerBuilder()15WeldingSafety16•Weldingcanbesafewhensufficientmeasuresaretakentoprotectyourselfandothersfrompotentialhazards•Studentsshouldreadandunderstandthefollowingbeforewelding:–WarningLabels–MaterialSafetyDataSheets(MSDS)•Studentsshouldalsobefamiliarwiththefollowinginformation–‘SafetyinWelding,Cutting,andAlliedProcesses’(ANSIZ49.1)–LincolnElectric’s‘ArcWeldingSafety’(E205)ArcWeldingSafety17WarningLabels•Understandandfollowallwarninglabelsfound:–Onweldingequipment–Withallconsumablepackaging–Withininstructionmanuals18MaterialSafetyDataSheets•MaterialSafetyDataSheets(MSDS)are:–RequiredbylawandOSHA–CreatedbythemanufacturerofaproductperOSHAguidelines–Designedtoinformusers–ShippedwitheveryboxofLincolnElectricconsumableproduct–Availablefreeonlineat:•MSDSoutlinesaproduct’s:IdentityandcompositionPotentialhazardsSafeuseHandlinginformationManufacturercontactinformationback20ANSIZ49.1•ANSIZ49.1:SafetyinWelding,Cutting,andAlliedProcesses–AsafetydocumentpublishedbytheAmericanWeldingSocietythatcoverssafepracticesintheweldingenvironment–Togetyourfreecopy,goto:•E205:ArcWeldingSafety–Asafetydocumentsummarizingmanyofthehazardsandsafepracticesforwelding–Downloadandprintyourowncopyat:–FreecopiesavailablefromLincolnElectricat:•AccesstheE-learningSite@•Protectyourselfandothersfrompotentialhazardsincluding:–FumesandGases–ElectricShock–ArcRays–FireandExplosionHazards–Noise–Hotobjects22FumesandGases•Fumesandgas