Ekukhiqizeni, ukushintshashintsha kwamanje kuvame ukusetshenziswa lapho kushiswa i-aluminium, i-magnesium nama-alloys abo, ukuze inqubo yokushintshanisa i-welding yamanje, lapho i-workpiece iyi-cathode, ingasusa ifilimu ye-oxide, engasusa ifilimu ye-oxide eyakhiwe ubuso bechibi elincibilikisiwe; i-tungsten idlulele kakhulu Lapho i-cathode isetshenziswa, i-electrode ye-tungsten ingapholiswa, futhi ngesikhathi esifanayo, ama-electron anele angakhishwa, okusiza ekuzinzeni kwe-arc, ukuze kokubili kucatshangelwe, kanye nokushisela. inqubo ingaqhubeka kahle.
Nokho, uma usebenzisa amandla e-AC, izinkinga ezilandelayo nazo ziyavela: Okokuqala, izokhiqiza ingxenye ye-DC, eyingozi; okwesibili, amandla e-AC adlula endaweni eyiziro izikhathi eziyi-100 ngomzuzwana, futhi izinyathelo zokuzinzisa i-arc kufanele zithathwe.
Okulandelayo kwethula ngokuyinhloko ukwenziwa nokuqedwa kwengxenye ye-DC.
Endabeni ye-AC arc, ngenxa yomehluko wezinto ezibonakalayo zikagesi nezishisayo kanye nobukhulu bejiyomethri be-electrode kanye nesisekelo sensimbi, ikholomu ye-arc conductivity, ukuqina kwenkundla kagesi kanye ne-arc voltage emijikelezweni emibili yengxenye ye-AC yamanje kukhona. i-asymmetrical, okwenza i-arc current Futhi ingabi ne-symmetrical. Emjikelezweni wesigamu we-tungsten pole cathode, ukuqhutshwa kwekholomu ye-arc kuphezulu, ukuqina kwensimu kagesi kuncane, i-arc voltage iphansi futhi yamanje inkulu; emjikelezweni wesigamu lapho isisekelo sensimbi siyi-cathode, isimo siphambene nje, i-arc voltage iphezulu futhi yamanje incane. Ngenxa ye-asymmetry yamanje emijikelezweni emibili yesigamu, yamanje ye-AC arc ingathathwa njengeyakhiwe izingxenye ezimbili, eyodwa ingeyamanje ye-AC, kanti enye iyi-DC yamanje ebekwe phezulu engxenyeni ye-AC, kanti yokugcina yingxenye ye-DC. Isenzeko sokuthi ingxenye ye-DC ikhiqizwa ku-AC arc ibizwa ngokuthi umphumela wokulungisa we-tungsten AC argon arc welding. Lo mphumela wokulungisa awukho nje kuphela phakathi ne-AC TIG yokushisela i-aluminium, kodwa futhi kwenzeka lapho izakhiwo ezibonakalayo zezinto ezimbili zama-electrode zihluke kakhulu. Le nkinga iphinde ibe khona lapho ama-alloys e-welding njengethusi ne-magnesium ene-AC. Ngisho nalapho into efanayo isetshenziselwa ukushiswa kwe-AC, ngenxa yomehluko phakathi kwe-electrode kanye ne-workpiece geometry nezimo zokushisa ukushisa, kuzoba nengxenye ye-DC, kodwa inani lincane kakhulu futhi alithinti ukusebenza okuvamile kwemishini.
I-Xinfa argon arc welding inekhwalithi enhle kakhulu nokuqina okuqinile, ukuze uthole imininingwane, sicela uhlole:https://www.xinfatools.com/tig-torches/
Uma izakhiwo zikagesi neze-thermophysical zesisekelo sensimbi kanye ne-electrode zihlukile, i-asymmetry eshiwo ngenhla izoba bucayi kakhulu, futhi ingxenye ye-DC izoba nkulu. Ngokuphambene nalokho, izakhiwo zikagesi neze-thermophysical zensimbi eyisisekelo kanye ne-electrode azifani kakhulu, futhi umehluko ekushiseni kokushisa phakathi kokubili kubangelwa kuphela izilinganiso ezihlukene zejometri, futhi umphumela wokulungisa awubonakali. Isibonelo, ku-MIG welding, i-welding wire kanye ne-workpiece ngokuvamile yenziwe ngezinto ezifanayo, ngakho-ke i-asymmetry eshiwo ngenhla ayibonakali, futhi ingxenye encane ye-DC inganakwa.
Ukuqondiswa kwengxenye ye-DC kuyafana nendlela yamanje kumjikelezo wengxenye ye-tungsten pole cathode, egeleza isuka kusisekelo kuya esigxotsheni se-tungsten, okulingana nogesi omuhle we-DC kusekethe ngesikhathi sokushisela. Ngenxa yokuba khona kwengxenye ye-DC, okokuqala, ukususwa kwefilimu ye-oxide nge-cathode kuzokwenziwa buthaka, futhi okwesibili, ingxenye ye-DC magnetic flux izokhiqizwa engxenyeni yensimbi ye-welding transformer, futhi le ngxenye i-DC magnetic flux izobe ibekwe phezu kwe-alternating flux magnetic, okwenza insimbi I-core ingase ifinyelele ukugcwala kazibuthe ohlangothini olulodwa, okuholela ekwandeni okukhulu kwe-transformer excitation current. Ngale ndlela, ngakolunye uhlangothi, ukulahlekelwa kwensimbi nokulahlekelwa kwethusi kwe-transformer kuzokwanda, ukusebenza kahle kuzokwehla, futhi ukuphakama kwezinga lokushisa kuzokwanda; ngakolunye uhlangothi, i-waveform ye-welding current izohlanekezelwa kakhulu, futhi isici samandla sizoncishiswa. Lokhu kuzoba nemiphumela emibi ekushiseni okuzinzile kwe-arc.
Isikhathi sokuthumela: May-08-2023
