Mu myitozo yo kubyaza umusaruro, guhinduranya amashanyarazi bikoreshwa muri rusange mugihe cyo gusudira aluminium, magnesium hamwe nudukoresho twazo, kugirango mugihe cyo guhinduranya gusudira kwubu, mugihe igihangano ari cathode, gishobora gukuraho firime ya oxyde, ishobora gukuraho firime ya oxyde yakozwe kuri ubuso bwa pisine yashongeshejwe; tungsten irakabije Iyo cathode ikoreshejwe, electrode ya tungsten irashobora gukonjeshwa, kandi mugihe kimwe, hashobora gusohoka electron zihagije, ibyo bikaba bifasha umutekano muke wa arc, kuburyo byombi bishobora kwitabwaho, hamwe no gusudira inzira irashobora kugenda neza.
Ariko, mugihe ukoresheje ingufu za AC, ibibazo bikurikira nabyo bivuka: Icya mbere, bizabyara ibice bya DC, byangiza; icya kabiri, ingufu za AC zinyura kuri zeru inshuro 100 kumasegonda, kandi hagomba gufatwa ingamba zo guhagarika arc.
Ibikurikira byerekana cyane ibisekuru no kurandura ibice bya DC.
Kubireba AC arc, kubera itandukaniro mumiterere yumuriro wumuriro nubushyuhe hamwe nuburinganire bwa geometrike ya electrode nicyuma fatizo, imiyoboro yinkingi ya arc, ubukana bwumuriro wamashanyarazi hamwe na arc voltage mubice bibiri byizunguruka byumuriro wa AC ni asimmetrical, gukora arc ya none Ntabwo ihuye. Muri kimwe cya kabiri cyinzira ya tungsten pole cathode, ubwikorezi bwinkingi ya arc ni ndende, ingufu z'umuriro w'amashanyarazi ni nto, voltage ya arc iri hasi kandi nubu ni nini; muri kimwe cya kabiri cyicyuma iyo icyuma fatizo ari cathode, ibintu birahabanye rwose, arc voltage nini kandi nubu ni nto. Bitewe na asimmetrie yumuyaga mubice bibiri byikurikiranya, imiyoboro ya AC arc irashobora gufatwa nkigizwe nibice bibiri, kimwe ni umuyoboro wa AC, ikindi ni umuyoboro wa DC urengeje igice cya AC, hanyuma uwanyuma ni DC. Ikintu ibintu bigize DC bikorerwa muri AC arc byitwa ingaruka zo gukosora tungsten AC argon arc gusudira. Izi ngaruka zo gukosora ntizibaho gusa mugihe cyo gusudira kwa AC TIG ya aluminium, ariko nanone bibaho mugihe ibintu bifatika byibikoresho byombi bya electrode bitandukanye cyane. Iki kibazo nacyo kibaho mugihe cyo gusudira amavuta nkumuringa na magnesium hamwe na AC. Ndetse mugihe ibikoresho bimwe bikoreshwa mugusudira AC, kubera itandukaniro riri hagati ya electrode nakazi ka geometrie hamwe nuburyo bwo gukwirakwiza ubushyuhe, hazaba harimo DC, ariko agaciro ni gake cyane kandi ntigire ingaruka kumikorere isanzwe yibikoresho.
Xinfa argon arc gusudira bifite ubuziranenge buhebuje kandi burambye, kubisobanuro birambuye, nyamuneka reba:https://www.xinfatools.com/tig-torches/
Niba amashanyarazi na thermofiziki yibyuma byibanze na electrode bitandukanye, asimmetrie yavuzwe haruguru izaba ikomeye, kandi ibice bya DC bizaba binini. Ibinyuranye, amashanyarazi na thermofiziki yibyuma fatizo na electrode ntaho bitandukaniye cyane, kandi itandukaniro ryogukwirakwiza ubushyuhe hagati yibi byombi biterwa gusa nuburinganire bwa geometrike, kandi ingaruka zo gukosora ntabwo zigaragara. Kurugero, muri MIG gusudira, insinga yo gusudira hamwe nakazi kakozwe mubusanzwe bikozwe mubintu bimwe, bityo asimmetrie yavuzwe haruguru ntabwo igaragara, kandi agace gato ka DC karashobora kwirengagizwa.
Icyerekezo cyibice bya DC ni kimwe nicyerekezo kigezweho muri kimwe cya kabiri cyinzira ya tungsten pole cathode, gitemba kiva mubikoresho fatizo kijya kuri tungsten pole, ibyo bikaba bihwanye n'amashanyarazi meza ya DC mumuzunguruko mugihe cyo gusudira. Bitewe no kubaho kwa DC, icya mbere, kuvanaho firime ya oxyde na cathode bizacika intege, icya kabiri, igice cya flux ya magnetiki DC kizabyara mugice cyicyuma cya transformateur yo gusudira, kandi iki gice cya DC ya magnetiki ya flux izashyirwa hejuru yumwimerere uhinduranya magnetique, gukora icyuma Intangiriro irashobora kugera kuri kwiyuzuzamo magnetique mu cyerekezo kimwe, bikavamo kwiyongera gukabije kwimyuka ihinduranya. Muri ubu buryo, kuruhande rumwe, gutakaza ibyuma no gutakaza umuringa wa transformateur biziyongera, imikorere izagabanuka, kandi ubushyuhe buzamuka; kurundi ruhande, imiyoboro yumurongo wo gusudira izagoreka cyane, kandi imbaraga zizagabanuka. Ibi bizagira ingaruka mbi kumuriro uhamye wa arc.
Igihe cyo kohereza: Gicurasi-08-2023
