Muzochita kupanga, alternating panopa amagwiritsidwa ntchito pamene kuwotcherera zotayidwa, magnesium ndi aloyi awo, kuti m`kati alternating kuwotcherera panopa, pamene workpiece ndi cathode, akhoza kuchotsa okusayidi filimu, amene angathe kuchotsa okusayidi filimu anapanga pa. pamwamba pa dziwe losungunuka; Tungsten kwambiri Pamene cathode ntchito, tungsten elekitirodi akhoza utakhazikika, ndipo nthawi yomweyo, ma elekitironi okwanira akhoza limatulutsa, amene amathandiza kukhazikika kwa arc, kotero kuti onse akhoza kuganiziridwa, ndi kuwotcherera. ndondomeko ikhoza kuyenda bwino.
Komabe, pogwiritsira ntchito mphamvu ya AC, mavuto otsatirawa amadzanso: Choyamba, chidzapanga gawo la DC, lomwe ndi lovulaza; chachiwiri, mphamvu ya AC imadutsa zero point 100 pa sekondi iliyonse, ndipo njira zokhazikika za arc ziyenera kuchitidwa.
Zotsatirazi zikuwonetsa m'badwo ndi kuchotsedwa kwa gawo la DC.
Pankhani ya AC arc, chifukwa cha kusiyana kwa magetsi ndi matenthedwe akuthupi ndi miyeso ya geometric ya electrode ndi chitsulo choyambira, arc column conductivity, mphamvu yamagetsi ndi magetsi a arc mu theka la magawo awiri a AC panopa ndi asymmetrical, kupanga arc panopa Komanso osati symmetrical. Mu theka la kuzungulira kwa tungsten pole cathode, ma conductivity a arc column ndi apamwamba, mphamvu yamagetsi yamagetsi ndi yaying'ono, mphamvu ya arc ndi yochepa ndipo panopa ndi yaikulu; mu kuzungulira theka pamene zitsulo m'munsi ndi cathode, zinthu ndi zosiyana, arc voteji ndi mkulu ndipo panopa ndi yaing'ono. Chifukwa cha asymmetry yapano mu magawo awiriwa, mawonekedwe a AC arc amatha kuwonedwa kuti ali ndi magawo awiri, imodzi ndi AC yapano, ndipo inayo ndi DC yomwe ili pamwamba pa gawo la AC, ndipo yomalizayo. ndi gawo la DC. Chodabwitsa kuti gawo la DC limapangidwa mu AC arc limatchedwa rectification effect ya tungsten AC argon arc welding. Izi rectification zotsatira osati alipo pa AC TIG kuwotcherera aluminiyamu, komanso zimachitika pamene thupi katundu wa elekitirodi zipangizo ziwiri zosiyana kwambiri. Vutoli limakhalaponso pamene kuwotcherera ma aloyi monga mkuwa ndi magnesium ndi AC. Ngakhale pamene zinthu zomwezo ntchito kuwotcherera AC, chifukwa cha kusiyana elekitirodi ndi workpiece geometry ndi kutentha dissipation zinthu, padzakhala DC chigawo chimodzi, koma mtengo ndi laling'ono kwambiri ndipo sizimakhudza ntchito bwinobwino zida.
Xinfa argon arc welding ili ndi mtundu wabwino kwambiri komanso kulimba kwamphamvu, kuti mumve zambiri, chonde onani:https://www.xinfatools.com/tig-torches/
Ngati mphamvu zamagetsi ndi thermophysical zazitsulo zoyambira ndi electrode ndizosiyana, asymmetry yomwe tatchulayi idzakhala yovuta kwambiri, ndipo gawo la DC lidzakhala lalikulu. M'malo mwake, mphamvu zamagetsi ndi thermophysical zazitsulo zam'munsi ndi electrode sizosiyana kwambiri, ndipo kusiyana kwa kutentha kwapakati paziwiri kumangochitika chifukwa cha miyeso yosiyana ya geometric, ndipo kukonzanso sikudziwika. Mwachitsanzo, mu kuwotcherera kwa MIG, waya wowotcherera ndi chogwirira ntchito nthawi zambiri amapangidwa ndi zinthu zomwezo, kotero kuti asymmetry yomwe tatchulayi sikuwonekera, ndipo gawo laling'ono la DC limatha kunyalanyazidwa.
Mayendedwe a gawo la DC ndi ofanana ndi momwe akuyendera pakatikati pa theka la cathode ya tungsten pole, yomwe imayenda kuchokera kuzinthu zoyambira kupita kumtengo wa tungsten, womwe ndi wofanana ndi mphamvu yamagetsi ya DC yozungulira powotcherera. Chifukwa cha kukhalapo kwa gawo la DC, choyamba, kuchotsedwa kwa filimu ya oxide ndi cathode kudzafooka, ndipo kachiwiri, gawo la DC magnetic flux lidzapangidwa pakatikati pachitsulo cha thiransifoma, ndipo gawo ili DC maginito flux adzakhala superimposed pa choyambirira alternating maginito flux, kupanga chitsulo pachimake akhoza kufika maginito machulukitsidwe mbali imodzi, chifukwa cha kuwonjezeka kwakukulu kwa thiransifoma malemeredwe panopa. Mwa njira iyi, kumbali imodzi, kutayika kwachitsulo ndi kutaya kwa mkuwa kwa thiransifoma kudzawonjezeka, mphamvuyo idzachepa, ndipo kutentha kumawonjezeka; Kumbali ina, mawonekedwe a mawotchi amagetsi adzasokonekera kwambiri, ndipo mphamvu yamagetsi idzachepetsedwa. Izi zidzakhala ndi zotsatira zoyipa pakuyaka kokhazikika kwa arc.
Nthawi yotumiza: May-08-2023
