I-aluminium alloy welding ihluke kakhulu ekushiseleni kwe-carbon steel evamile, insimbi engagqwali nezinye izinto. Kulula ukukhiqiza amaphutha amaningi ezinye izinto ezingenakho, futhi izinyathelo ezihlosiwe zidinga ukuthathwa ukuze zigweme. Ake sibheke izinkinga ezingenzeka kalula ku-aluminium alloy welding kanye nezidingo zobuchwepheshe bokushisela.
Ubunzima bokushisela i-aluminium alloy materials I-thermal conductivity ye-aluminium alloy materials iphindwe izikhathi ezingu-1 kuya kwezi-3 kunensimbi, futhi kulula ukuyishisa. Kodwa-ke, le nto ayimelani nokushisa okuphezulu futhi ine-coefficient enkulu yokwandisa lapho ishisa, okubangela kalula ukuguqulwa kwe-welding. Ngaphezu kwalokho, le nto ijwayele ukuqhekeka kanye nokungena kwe-weld ngesikhathi sokushisela, ikakhulukazi ukushisela amapuleti amancane e-aluminium kunzima kakhulu.
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I-aluminium alloy welding izokhiqiza inani elithile le-hydrogen echibini elincibilikisiwe. Uma la magesi engakhishwa ngaphambi kokuba i-weld yakhelwe, izobangela ama-pores ku-weld futhi ithinte ikhwalithi yezingxenye ezihlanganisiwe.
I-Aluminium iyinsimbi ekhishwa kalula nge-oxidized, futhi cishe ayikho i-aluminium enoxidized emoyeni. Lapho ingaphezulu lengxubevange ye-aluminium livezwa ngokuqondile emoyeni, ifilimu ye-aluminium oxide eminyene futhi engancibiliki izokwakhiwa phezu kwayo. Ifilimu ye-oxide imelana ngokwedlulele futhi imelana nokushisa okuphezulu, nendawo yokuncibilika engaphezu kuka-2000 degrees Celsius. Uma sebukhiwe, ubunzima bokucubungula obulandelayo buzokhula kakhulu.
I-aluminium alloy welding nayo inezinkinga njengokuthi ilunga lithambe kalula, futhi ukungezwani kwendawo lapho kuncibilikisiwe kuncane futhi kulula ukukhiqiza amaphutha.
Izidingo zenqubo ye-aluminium alloy welding
Okokuqala, ngokombono wemishini yokushisela, uma kusetshenziswa umshini wokushisela we-MIG/MAG, kufanele ube nemisebenzi ye-pulse efana ne-pulse eyodwa noma i-double pulse. Umsebenzi we-Double pulse unomphumela omuhle kakhulu. I-Double pulse yi-superposition ye-high-frequency pulse kanye ne-low-frequency pulse, futhi i-low-frequency pulse isetshenziselwa ukulinganisa ukushaya kwe-high-frequency pulse. Ngale ndlela, i-double pulse current igxilwe emvamisa ye-low-frequency pulse ukushintsha ngezikhathi ezithile phakathi kwe-peak current kanye ne-base current, ukuze i-weld yakhe izilinganiso zezinhlanzi ezivamile.
Uma ufuna ukushintsha umphumela wokwakheka we-weld, ungalungisa imvamisa kanye nenani eliphakeme le-low-frequency pulse. Ukulungisa i-low-frequency pulse frequency kuzothinta isivinini sokushintsha phakathi kwenani eliphakeme kanye nenani eliyisisekelo le-double pulse current, okuzoshintsha ukuhlukana kwephethini yesikali sezinhlanzi ze-weld. Uma isivinini sokushintsha sikhulu, sincane isikhala sephethini yesikali sezinhlanzi. Ukulungisa inani eliphakeme le-low-frequency pulse kungashintsha umthelela onyakazayo echibini elincibilikisiwe, ngaleyo ndlela kushintshe ukujula kokushisela. Ukukhetha inani eliphakeme elifanelekile kunemiphumela esobala ekunciphiseni ukukhiqizwa kwezimbotshana, ukunciphisa okokufaka ukushisa, ukuvimbela ukunwetshwa nokuguqulwa, kanye nokuthuthukisa amandla e-weld.
Ngaphezu kwalokho, ngokombono wenqubo yokushisela, lezi zindaba ezilandelayo kufanele ziqashelwe:
Okokuqala, ubuso be-aluminium alloy kufanele buhlanzwe ngaphambi kokushisela, futhi lonke uthuli namafutha kufanele kususwe. I-acetone ingasetshenziswa ukuhlanza indawo yokushisela i-aluminium alloy. Ukuze uthole ingxube ye-aluminium ewugqinsi, kufanele ihlanzwe ngebhulashi locingo kuqala, bese kuba nge-acetone.
Okwesibili, i-welding wire material esetshenzisiwe kufanele ibe seduze nempahla yomzali ngangokunokwenzeka. Ukuthi ukhetha intambo yokushisela ye-aluminium silicon noma i-aluminium magnesium welding wire kufanele kunqunywe ngokuvumelana nezidingo ze-weld. Ngaphezu kwalokho, i-aluminium welding wire ingasetshenziswa kuphela ukushisela izinto ze-aluminium magnesium, kuyilapho i-aluminium welding wire isetshenziswa kabanzi. Ingakwazi ukushisela izinto ze-aluminium silicon nezinto ze-aluminium magnesium.
Okwesithathu, lapho ubukhulu bepuleti bukhulu, ipuleti kufanele lishiswe kusengaphambili, ngaphandle kwalokho kulula ukushisela. Lapho uvala i-arc, kufanele kusetshenziswe umsinga omncane ukuvala i-arc futhi ugcwalise umgodi.
Okwesine, lapho kwenziwa i-tungsten inert gas welding welding, kufanele kusetshenziswe umshini wokushisela we-DC argon arc, futhi i-AC ne-DC eya phambili nangemuva kufanele isetshenziswe ngokushintshana. I-Forward DC isetshenziselwa ukuhlanza isikhunta se-oxidation esingaphezulu sezinto ze-aluminium, futhi i-DC ehlehlayo isetshenziselwa ukushisela.
Futhi qaphela ukuthi imininingwane yokushisela kufanele isethwe ngokuvumelana nobukhulu bepuleti kanye nezidingo zokushisela; I-MIG yokushisela kufanele isebenzise isondo elikhethekile le-aluminium lokuphakelayo kwezintambo kanye neshubhu lokuqondisa izintambo ze-Teflon, ngaphandle kwalokho kuzokwenziwa ama-chips e-aluminium; ikhebula lokushisela isibhamu akufanele libe lide kakhulu, njengoba intambo yokushisela i-aluminium ithambile futhi intambo ende kakhulu yesibhamu sokushisela izothinta ukuzinza kokuphakelayo kwezintambo.
Isikhathi sokuthumela: Aug-27-2024
