Welding e ka sebelisa mochini oa welding oa AC kapa oa DC.Ha o sebelisa mochini oa welding oa DC, ho na le khokahano e ntle le khokahanyo e khutlisetsang morao.Lintlha tse kang electrode e sebelisitsoeng, boemo ba thepa ea kaho le boleng ba ho cheselletsa li lokela ho nkoa.
Ha ho bapisoa le phepelo ea motlakase ea AC, phepelo ea motlakase ea DC e ka fana ka arc e tsitsitseng le phetiso ea marotholi a boreleli.- Hang ha arc e chesitsoe, DC arc e ka boloka mollo o sa khaotseng.
Ha u sebelisa welding ea matla a AC, ka lebaka la phetoho ea tataiso ea hona joale le ea motlakase, 'me arc e hloka ho tima le ho tsosolosoa ka makhetlo a 120 ka motsotsoana, arc e ke ke ea chesa ka ho tsoelang pele le ka mokhoa o tsitsitseng.
Tabeng ea hona joale welding e tlaase, DC arc e na le phello e ntle ea ho kolobisa tšepe e entsoeng ka tšepe e qhibilihisitsoeng 'me e ka laola boholo ba sefaha sa weld, kahoo e loketse haholo bakeng sa ho kenya likarolo tse tšesaane.Matla a DC a loketse ho cheseletsa holimo holimo le holimo ho feta matla a AC hobane DC arc e khuts'oane.
Empa ka linako tse ling ho phatloha ha arc ea phepelo ea motlakase ea DC ke bothata bo hlahelletseng, 'me tharollo ke ho fetolela phepelong ea motlakase ea AC.Bakeng sa li-electrode tsa AC le tsa DC tse etselitsoeng ho cheselletsa motlakase oa AC kapa DC, lisebelisoa tse ngata tsa welding li sebetsa betere tlasa maemo a matla a DC.
(1)Tloaelehileng sebopeho tšepe tjheseletsa
Bakeng sa li-electrode tse tloaelehileng tsa tšepe le li-electrode tsa acid, AC le DC li ka sebelisoa.Ha o sebelisa mochini oa tjheseletsa oa DC ho tjheseletsa lipoleiti tse tšesaane, ho molemo ho sebelisa khokahano ea reverse ea DC.
Ka kakaretso, khokahano e tobileng ea hona joale e ka sebelisoa bakeng sa welding e teteaneng ea poleiti ho fumana ho kenella ho hoholo.Ha e le hantle, ho ka khoneha hore ho be le khokahanyo ea morao-rao ea morao-rao, empa bakeng sa ho tšehetsa welding ea lipoleiti tse teteaneng tse nang le li-grooves, ho ntse ho le molemo ho sebelisa khokahanyo e tobileng ea morao-rao.
Li-electrode tsa mantlha hangata li sebelisa khokahano ea reverse ea DC, e ka fokotsang porosity le spatter.
(2)Molten arc welding (MIG welding)
Metal arc welding ka kakaretso e sebelisa khokahano ea reverse ea DC, e sa tsitsang arc feela, empa hape e tlosa filimi ea oxide e holim'a tjheseletsa ha o tjheseletsa aluminium.
(3) Welding ea Tungsten argon arc (TIG welding)
Tungsten argon arc welding ea likarolo tsa tšepe, nickel le li-alloys tsa eona, koporo le li-alloys tsa eona, koporo le lisebelisoa tsa eona li ka kopanngoa feela le hona joale ka ho toba.Lebaka ke hore haeba khokahanyo ea DC e khutlisetsoa morao 'me motlakase oa tungsten o kopantsoe le electrode e ntle, mocheso oa motlakase o motle o tla ba o phahameng, mocheso o tla ba o eketsehileng,' me motlakase oa tungsten o tla qhibiliha ka potlako.
Ho qhibiliha ka potlako haholo, ho sitoa ho etsa hore arc e chese ka mokhoa o tsitsitseng ka nako e telele, 'me tungsten e qhibilihisitsoeng e oelang ka har'a letamo le qhibilihisitsoeng e tla etsa hore tungsten e kenyelelitsoe le ho fokotsa boleng ba weld.
(4)Welding e sirelelitsoeng ka khase ea CO2 (welding ea MAG)
E le ho boloka arc e tsitsitse, sebopeho se setle sa weld, le ho fokotsa spatter, CO2 khase e sirelelitsoeng welding hangata e sebelisa DC reverse connection . ho futhumatsa ha workpiece, le khokahanyo e ntle ea DC e atisa ho sebelisoa.
(5)Ho cheselletsa tšepe e sa hloekang
Electrode ea tšepe e sa hloekang ka ho khetheha e fetotsoe ke DC.Haeba u se na mochini oa welding oa DC 'me litlhoko tsa boleng ha li phahame haholo, u ka sebelisa electrode ea mofuta oa Chin-Ca ho tjheseletsa ka mochini oa welding oa AC.
(6)Lokisa welding ea tšepe e entsoeng ka tšepe
Ho lokisoa ha likarolo tsa tšepe hangata ho sebelisa mokhoa oa ho hokahanya oa DC.Nakong ea welding, arc e tsitsitse, spatter e nyane, 'me botebo ba ho kenella ha bo teba, bo finyellang litlhoko tsa tekanyo e tlaase ea dilution bakeng sa ho lokisa tšepe ea tšepe ho fokotsa sebopeho sa crack.
(7) Ka tlas'a metsi arc automatic weld
Welding e kentsoeng ka metsing ea arc e ka tšelisoa ka phepelo ea motlakase ea AC kapa ea DC.E khethoa ho latela litlhoko tsa welding ea sehlahisoa le mofuta oa flux.Haeba ho sebelisoa nickel-manganese low-silicon flux, ho lokela ho sebelisoa welding ea motlakase oa DC ho netefatsa botsitso ba arc ho fumana ho kenella ho hoholo.
(8) Papiso pakeng tsa AC welding le DC welding
Ha ho bapisoa le phepelo ea motlakase ea AC, phepelo ea motlakase ea DC e ka fana ka arc e tsitsitseng le phetiso ea marotholi a boreleli.- Hang ha arc e chesitsoe, DC arc e ka boloka mollo o sa khaotseng.
Ha u sebelisa welding ea matla a AC, ka lebaka la phetoho ea tataiso ea hona joale le ea motlakase, 'me arc e hloka ho tima le ho tsosolosoa ka makhetlo a 120 ka motsotsoana, arc e ke ke ea chesa ka ho tsoelang pele le ka mokhoa o tsitsitseng.
Tabeng ea hona joale welding e tlaase, DC arc e na le phello e ntle ea ho kolobisa tšepe e entsoeng ka tšepe e qhibilihisitsoeng 'me e ka laola boholo ba sefaha sa weld, kahoo e loketse haholo bakeng sa ho kenya likarolo tse tšesaane.Matla a DC a loketse ho cheseletsa holimo holimo le holimo ho feta matla a AC hobane DC arc e khuts'oane.
Empa ka linako tse ling ho phatloha ha arc ea phepelo ea motlakase ea DC ke bothata bo hlahelletseng, 'me tharollo ke ho fetolela phepelong ea motlakase ea AC.Bakeng sa li-electrode tse peli tsa AC le DC tse etselitsoeng ho cheseletsa matla a AC kapa DC, boholo ba likopo tsa ho tjheseletsa li sebetsa hamolemo tlas'a maemo a matla a DC.
Ho tjheseletsa arc ka letsoho, metjhini ya welding ya AC le disebediswa tse ding tse eketsehileng di theko e tlase, mme di ka qoba ditlamorao tse kotsi tsa matla a ho foka a arc ka hohle kamoo ho ka kgonehang.Empa ntle le litšenyehelo tse tlase tsa lisebelisoa, welding ka matla a AC ha e sebetse joalo ka matla a DC.
Mehloli ea matla a Arc welding (CC) e nang le litšobotsi tse moepa e loketseng hantle bakeng sa ho cheselletsa arc ka letsoho.Phetoho ea motlakase e tsamaellanang le phetoho ea hona joale e bonts'a ho fokotseha butle-butle ha nako ea arc e ntse e eketseha.Tšobotsi ena e fokotsa boholo ba arc current esita le haeba welder e laola boholo ba letamo le qhibilihisitsoeng.
Liphetoho tse lulang li le teng ka bolelele ba li-arc li ke ke tsa qojoa ha mochine o cheselletsang motlakase o tsamaisa electrode hammoho le weldment, 'me tšobotsi ea ho qoelisa ea mohloli oa matla a arc e tiisa botsitso ba arc nakong ea liphetoho tsena.
Nako ea poso: May-25-2023