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AC arc welding machine



Structure

ACarcweldingmachinemainlyhasthreetypes:movingironcoretype,samebodytypeandmovingcoiltype.Ithastheadvantagesofsimplestructure,easymanufactureandrepair,lowcostandhighefficiency.Butitscurrentwaveformissinewave,theoutputisACdropexternalcharacteristics,thearcstabilityispoor,thepowerfactorislow,butthemagneticbiasphenomenonisrarelygenerated,andtheno-loadlossissmall.Itisgenerallyusedinmanualarcwelding,submergedarcweldingandMethodssuchasargontungstenarcwelding.

Precautions

(1)Thearcweldingmachineshouldbekeptawayfromflammableandexplosivematerials;thearcweldingmachineshouldbecompatiblewiththeinstallationenvironment;thearcweldingmachineshouldbeprotectedfrommoistureandcanPreventforeignobjectsfromentering.

(2)Theshellofthearcweldingmachineshouldbereliablyconnectedtotheprotectiveconductor;inordertopreventthedangerofhighvoltagefromenteringthelowvoltage,apointonthesecondarysideofthearcweldingmachineshouldalsobeconnectedtotheprotectiveconductor.

(3)Theprimaryratedvoltageofthearcweldingmachineshouldbeconsistentwiththepowersupplyvoltage;theworkingcurrentshouldnotexceedtheallowablecurrentunderthecorrespondingdutycycle.

(4)Thearcweldingmachineshouldbewiredthroughtheterminalblock;thewiringshouldbecorrect,andharmfulcirculatingcurrentsshouldbeavoided.

(5)Multipleweldingmachinesshouldbetappedtothethree-phasepowersourceasevenlyaspossible,andthethree-phasebalanceshouldbekeptasmuchaspossible.

(6)Coppercorerubbercables(rubbersheathedcords)shouldbeusedfortheprimaryandsecondarypowercordsofthearcweldingmachine;thelengthoftheprimarycordshouldnotexceed2to3m.

(7)Theinsulationresistanceoftheprimaryandsecondarycoilsofthearcweldingmachineisqualified.

(8)Themobileweldingmachinemustbepoweredoff.

(9)Whenworkinginanenvironmentwithahighriskofelectricshock,thesecondarysideofthearcweldingmachineshouldbeequippedwithanautomaticpower-offdeviceforextinguishingthearc.

(10)Protectiveequipmentsuchasinsulatedshoes,gloves,overalls,andfaceshieldsshouldbewornduringarcwelding;protectiveequipmentsuchashelmetsandelbowpadsshouldalsobewornwhenworkinginmetalcontainers.

Operatingprocedures

One.Notecontent:

1Preparationbeforeoperation:

1-1Whetherthemainpowerswitchhasbeenturnedon.

Whetherthe1-2leadwiresandtheconnectionpointsaregood.

Whetherthe1-3workfixedwireiswellinsulated,andwhethertheclampoftheweldingrodiswellinsulated.

Checkwhetherthe1-4groundwire,electricweldingreturnwireandweldingairportgroundareinflammableandexplosivematerials(ifanyshouldberemoved).

2Operationsteps:

2-1Turntheswitchknobclockwiseawayfromthe"O"positiontothedesiredposition,andtheweldingmachineisturnedon.

2-2Turntheswitchknobcounterclockwisetothe"0"position,andtheweldingmachineisturnedonandoff.

3Abnormalhandling:

3-1Ifanabnormalsituationoccursduringwelding,thepowersupplyshouldbecutoffimmediately.

2.Attentions:

1.Electricweldingisaspecialtypeofwork.Youmustobtainawelder’soperatingcertificatebeforeyoucanstartoperation.

2.Protectiveequipmentmustbewornbeforework.Workersmustwearprotectiveglassesorfaceshieldsduringoperation(includingslagging).

3.Open-airelectricweldingisnotallowedonrainydays.Whenworkingindampareas,standinaplacecoveredwithinsulatingmaterialsandwearinsulatingshoes.

4.Tomovethepositionoftheelectricweldingmachine,shutdownandcutoffthepowerfirst.Ifthereisasuddenpowercutduringwelding,theelectricweldershouldbeturnedonimmediately.

5.Whenoperatingpressurecontainers,sealedcontainers,variousoildrums,pipes,andworkpiecesstainedwithflammablegasesandsolutions,theymustbeinspectedinadvance,andthetoxic,harmful,andInflammableandexplosivesubstances,solvethepressureofthecontainerandpipeline,eliminatetheclosedstate(openopening,screwopening),andthenwork.

6.Itisforbiddentoweldinthecontainerthathasbeenpaintedorsprayedwithwallmaterials.

7.Aftertheworkiscompleted,checkthesite,turnoffthefire,andcutoffthepowerbeforeleavingtheworksite.

8.Afterthedailyworkisover,theweldingslagshouldbecleanedup,andthewires(powercords,workreturnlines,etc.)shouldbearrangedtomaintainenvironmentalhygiene.

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