Ukushisela kungasebenzisa umshini wokushisela we-AC noma we-DC.Uma usebenzisa umshini wokushisela we-DC, kukhona ukuxhumana okuhle nokuhlehla.Izinto ezifana ne-electrode esetshenzisiwe, isimo semishini yokwakha, kanye nekhwalithi yokushisela kufanele kucatshangelwe.
Uma kuqhathaniswa nokunikezwa kwamandla e-AC, ugesi we-DC unganikeza i-arc ezinzile kanye nokudluliswa kwamaconsi abushelelezi.- Uma i-arc ibasiwe, i-DC arc ingagcina ukuvutha okuqhubekayo.
Uma usebenzisa i-welding yamandla e-AC, ngenxa yokuguqulwa kwesiqondiso samanje ne-voltage, futhi i-arc idinga ukucisha futhi iphinde ivuthwe izikhathi ezingu-120 ngomzuzwana, i-arc ayikwazi ukushisa ngokuqhubekayo nangokuzinza.
Endabeni ye-welding yamanje ephansi, i-DC arc inomphumela omuhle wokumanzisa ensimbi encibilikisiwe ye-weld futhi ingalawula usayizi we-weld bead, ngakho ifaneleka kakhulu ukushisela izingxenye ezincane.Amandla e-DC afaneleka kakhulu ukushisela phezulu nokuma mpo kunamandla e-AC ngoba i-DC arc yimfushane.
Kodwa ngezinye izikhathi ukushaywa kwe-arc kokunikezwa kwamandla kagesi e-DC kuyinkinga evelele, futhi isisombululo siwukuguqulela kugesi we-AC.Kuma-electrode anezinjongo ezimbili ze-AC ne-DC akhelwe ukushisela amandla e-AC noma e-DC, izinhlelo eziningi zokushisela zisebenza kangcono ngaphansi kwezimo zamandla e-DC.
(1)Ukushisela okujwayelekile kwensimbi yesakhiwo
Kuma-electrode ensimbi yesakhiwo ajwayelekile nama-electrode e-asidi, kokubili i-AC ne-DC ingasetshenziswa.Uma usebenzisa umshini wokushisela we-DC ukushisela amapuleti amancane, kungcono ukusebenzisa uxhumano lwe-DC reverse.
Ngokuvamile, uxhumano lwamanje oluqondile lungasetshenziselwa ukushisela ipuleti eliwugqinsi ukuze kutholakale ukungena okukhulu.Vele, ukuhlanekezela ukuxhumana okuqondile kwamanje nakho kungenzeka, kepha ekusekeleni i-welding yamapuleti aminyene anemifantu, kusengcono ukusebenzisa ukuxhumana okuqondile kwamanje.
Ama-electrode ayisisekelo ngokuvamile asebenzisa uxhumano lwe-DC reverse, olunganciphisa i-porosity ne-spatter.
(2)I-Molten arc welding (welding ye-MIG)
I-Metal arc welding ngokuvamile isebenzisa uxhumano lwe-DC reverse, olungagcini nje ngokuzinzisa i-arc, kodwa futhi lususa ifilimu ye-oxide ebusweni be-weldment lapho i-aluminium ishisela.
(3) I-tungsten argon welding (welding ye-TIG)
I-tungsten argon welding yezingxenye zensimbi, i-nickel kanye nama-alloys ayo, ithusi kanye nama-alloys ayo, ithusi nama-alloys ayo angaxhunywa kuphela namanje okuqondile.Isizathu siwukuthi uma uxhumano lwe-DC luhlehliswa futhi i-electrode ye-tungsten ixhunywe ku-electrode enhle, izinga lokushisa le-electrode elihle lizoba phezulu, ukushisa kuyoba ngaphezulu, futhi i-electrode ye-tungsten izoncibilika ngokushesha.
Ukuncibilika ngokushesha okukhulu, okungakwazi ukwenza i-arc ishe iqine isikhathi eside, futhi i-tungsten encibilikisiwe iwela echibini elincibilikisiwe kuzodala ukufakwa kwe-tungsten futhi kunciphise ikhwalithi yokushisela.
(4)I-CO2 i-gas shielded welding (i-MAG welding)
Ukuze ugcine i-arc izinzile, ukuma okuhle kakhulu kwe-weld, nokunciphisa i-spatter, i-CO2 yegesi evikelekile yokushisela ngokuvamile isebenzisa uxhumano lwe-DC reverse .Kodwa-ke, ekufakeni i-welding kanye nokulungisa i-welding ye-cast iron, kuyadingeka ukwandisa izinga lokubeka insimbi nokunciphisa. ukushisa kwe-workpiece, kanye nokuxhumeka kwe-DC positive kuvame ukusetshenziswa.
(5)Ukushisela insimbi engagqwali
I-electrode yensimbi engagqwali kungcono ukuthi iguqulwe i-DC.Uma ungenayo umshini wokushisela we-DC futhi izidingo zekhwalithi aziphezulu kakhulu, ungasebenzisa i-electrode yohlobo lwe-Chin-Ca ukushisela ngomshini wokushisela we-AC.
(6)Lungisa ukushisela kwensimbi eyinsimbi
I-welding yokulungisa izingxenye zensimbi ngokuvamile isebenzisa indlela yokuxhuma i-DC reverse.Ngesikhathi sokushisela, i-arc izinzile, i-spatter incane, futhi ukujula kokungena akujulile, okuvele kuhlangabezane nezidingo zezinga eliphansi lokuhlanjululwa kwe-cast iron repair welding ukuze kuncishiswe ukwakheka kokuqhekeka.
(7) Ukushisela okuzenzakalelayo kwe-arc
Ukushisela okuzenzakalelayo kwe-arc okungaphansi kwamanzi kungashiselwa ngogesi we-AC noma we-DC.Kukhethwa ngokuya ngezidingo zokushisela umkhiqizo kanye nohlobo lwe-flux.Uma kusetshenziswa i-nickel-manganese low-silicon flux, i-DC power supply welding kumele isetshenziselwe ukuqinisekisa ukuzinza kwe-arc ukuze kutholwe ukungena okukhulu.
(8) Ukuqhathanisa phakathi kwe-AC welding kanye ne-DC welding
Uma kuqhathaniswa nokunikezwa kwamandla e-AC, ugesi we-DC unganikeza i-arc ezinzile kanye nokudluliswa kwamaconsi abushelelezi.- Uma i-arc ibasiwe, i-DC arc ingagcina ukuvutha okuqhubekayo.
Uma usebenzisa i-welding yamandla e-AC, ngenxa yokuguqulwa kwesiqondiso samanje ne-voltage, futhi i-arc idinga ukucisha futhi iphinde ivuthwe izikhathi ezingu-120 ngomzuzwana, i-arc ayikwazi ukushisa ngokuqhubekayo nangokuzinza.
Endabeni ye-welding yamanje ephansi, i-DC arc inomphumela omuhle wokumanzisa ensimbi encibilikisiwe ye-weld futhi ingalawula usayizi we-weld bead, ngakho ifaneleka kakhulu ukushisela izingxenye ezincane.Amandla e-DC afaneleka kakhulu ukushisela phezulu nokuma mpo kunamandla e-AC ngoba i-DC arc yimfushane.
Kodwa ngezinye izikhathi ukushaywa kwe-arc kokunikezwa kwamandla kagesi e-DC kuyinkinga evelele, futhi isisombululo siwukuguqulela kugesi we-AC.Okwama-electrode e-AC kanye ne-DC ahloselwe ukushisela amandla e-AC noma e-DC, izicelo eziningi zokushisela zisebenza kangcono ngaphansi kwezimo zamandla e-DC.
Emshinini wokushisela we-arc owenziwe ngesandla, imishini yokushisela i-AC kanye namanye amadivaysi angeziwe ashibhile, futhi angagwema imiphumela eyingozi yamandla okufutha i-arc ngangokunokwenzeka.Kodwa ngaphezu kwezindleko eziphansi zemishini, ukushisela ngamandla e-AC akuphumelelanga njengamandla e-DC.
Imithombo yamandla okushisela i-Arc (CC) enezici zokuwa phansi ifaneleka kangcono ukushiselwa kwe-arc okwenziwa ngesandla.Ushintsho ku-voltage oluhambisana noshintsho lwamanje lubonisa ukwehla kancane kancane kwamandla njengoba ubude be-arc bukhula.Lesi sici sikhawulela umkhawulo wamanje we-arc noma ngabe i-welder ilawula usayizi wechibi elincibilikisiwe.
Izinguquko eziqhubekayo kubude be-arc azinakugwenywa njengoba isishiseli sihambisa i-electrode endaweni yokushisela, futhi isici sokucwilisa somthombo wamandla we-arc welding siqinisekisa ukuzinza kwe-arc phakathi nalezi zinguquko.
Isikhathi sokuthumela: May-25-2023