SMAW, eo hape e tsejoang ka hore ke electrode arc welding, ke mokhoa oa ho tjheseletsa oa fusion oo arc e hlahisoang ke electrode le likarolo tsa welding li qhibilihisoa ke mocheso oa arc.Ke mokhoa o sebelisoang haholo le o tloaelehileng oa ho tjheseletsa ha joale.
Arc ke ts'ebetso ea ho tsamaisa moea.The tjheseletsa arc ke e matla le e phehellang ho tebelwa phenomenon generated ka seaplane khase pakeng tsa eleketrode le workpiece.Nakong ea ts'ebetso ea ho tjheseletsa, electrode le weldment li kopantsoe ka ho latellana ho li-electrode tse peli tsa mohloli oa matla a ho tjheseletsa.Ha mokokotlo oa tjheseletsa oa electrode o kopana le holim'a tjheseletsa, potoloho e buloa, 'me motlakase o moholo oa nako e khutšoanyane o hlahisoa ka nako e le' ngoe.Kaha ho na le khanyetso e itseng ha ho kopana, ho ea ka Q = I2Rt, mocheso o moholo o tla hlahisoa moo, 'me mocheso o tla chesa ka potlako' me o qhibilihe ho kopana.Ha electrode e phahamisoa ke 2 ~ 4mm, sebaka sa khase pakeng tsa electrode le weldment se ionized, se hlahisa li-electrone tsa conductive le li-ion tse ntle.Tlas'a ketso ea tšimo ea motlakase, li-electrone li fallela ho anode, 'me li-ion tse ntle li fallela ho cathode.Li thula 'me li kopana hape li sa khaotse, li fetola matla a kinetic ho matla a mocheso, kahoo li hlahisa leseli le matla le mocheso o phahameng,' me li etsa arc pakeng tsa qetello ea electrode le weldment.
Arc e qhibilihisa pheletso ea electrode le weldment e lumellanang ka nako e le 'ngoe.Tšepe ea weld ea qhibiliha ho etsa letamo le qhibilihisitsoeng, 'me tšepe ea electrode ea qhibiliha ho etsa lerotholi.Marotholi a qhibilihisitsoeng a kena ka letamong la ho qhibiliha tlas'a ketso ea matla a khoheli le arc e fokang, a kopanya le tšepe ea weldment, 'me a etsa weld ka mor'a ho tiea.Nakong ea ts'ebetso ea ho cheselletsa, ho roala ho qhibiliha ho theha slag 'me ho hlahisoa khase e ngata, e sireletsang le ho tšoara metallurgically tšepe ea letamo le qhibilihisitsoeng.
The welding arc e na le likarolo tse tharo: sebaka sa cathode, sebaka sa anode le sebaka sa arc column.Sebaka sa cathode se hlahisa lielektrone, 'me mocheso o tlaase, hoo e ka bang 2400K;sebaka sa anode se amohela lielektrone, 'me mocheso o phahame, hoo e ka bang 2600K;mocheso o bohareng oa sebaka sa kholomo ea arc ke o phahameng ka ho fetisisa, hoo e ka bang 6000 ~ 8000K.
Ha o sebelisa mohloli oa motlakase oa DC arc welding (joalo ka arc welding rectifier) bakeng sa welding, ho na le mekhoa e 'meli ea khokahano: khokahano e ntle le khokahanyo e khutlisetsang morao.Khokahano e ntle ke mokhoa oa ho hokahanya moo eleketrode e hokahaneng le eleketrode e mpe mme sesebelisoa sa mosebetsi se hokahantsoe le electrode e ntle.Kaha electrode e ntle e amohela lielektrone 'me e hlahisa mocheso o mongata, weldment e bonolo ho phunyeletsa, kahoo mokhoa ona oa ho hokahanya o atisa ho sebelisoa bakeng sa ho cheselletsa li-workpieces tse teteaneng.Reverse connection ke mokhoa oa ho hokahanya oo electrode e hokahaneng le electrode e ntle 'me workpiece e amana le electrode e mpe.Kaha mocheso o hlahisoang ke li-elektronike tse hlahisoang ke eleketrode e mpe e fokotsehile, ho chesehela ha ho bonolo ho chesa, kahoo mokhoa ona oa ho hokahanya o atisa ho sebelisoa bakeng sa ho cheselletsa li-workpieces tse tšesaane.
Mocheso o hlahisoang ke welding arc o lekana le sehlahisoa sa motlakase oa arc le hona joale oa welding (ke hore, Q = IUt).Hangata, motlakase o pakeng tsa weldment le electrode ha arc e chesoa ka mokhoa o tsitsitseng o bitsoa arc voltage, 'me motlakase oa arc hangata o le 20 ~ 35V.Hobane motlakase oa arc o fetoha hanyane, mocheso oa arc o fetoloa haholo ka ho lokisa hona joale oa welding tlhahiso.
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Nako ea poso: Dec-30-2022 