Kwimveliso yokuvelisa, ukutshintshwa kwangoku kusetyenziswa xa kuthungelwa i-aluminium, i-magnesium kunye ne-alloys zabo, ukuze kwinkqubo yokutshintshela i-welding yangoku, xa i-workpiece yi-cathode, inokususa ifilimu ye-oxide, enokuthi isuse ifilimu ye-oxide eyenziwe kuyo. umphezulu wechibi elityhidiweyo; I-tungsten igqithise kakhulu Xa i-cathode isetyenzisiweyo, i-electrode ye-tungsten inokupholiswa, kwaye ngexesha elifanayo, ii-electron ezaneleyo zinokukhutshwa, ezilungele ukuzinza kwe-arc, ukuze zombini zithathelwe ingqalelo, kunye ne-welding. inkqubo inokuqhubeka kakuhle.
Nangona kunjalo, xa usebenzisa amandla e-AC, ezi ngxaki zilandelayo nazo zivela: Okokuqala, iya kuvelisa icandelo le-DC, eliyingozi; okwesibini, amandla e-AC adlula kwindawo ye-zero ngamaxesha angama-100 ngesibini, kwaye amanyathelo okuzinzisa i-arc kufuneka athathwe.
Oku kulandelayo kwazisa ukuveliswa kunye nokupheliswa kwecandelo le-DC.
Kwimeko ye-AC arc, ngenxa yomahluko kwiipropati zombane kunye ne-thermal emzimbeni kunye nemilinganiselo yejometri ye-electrode kunye nesiseko sesinyithi, i-arc column conductivity, amandla entsimi yombane kunye ne-arc voltage kwisiqingatha semijikelo ye-AC yangoku. i-asymmetrical, yenza i-arc yangoku Kwakhona ingabi macala. Kumjikelezo wesiqingatha se-tungsten pole cathode, i-conductivity yekholomu ye-arc iphezulu, umbane wentsimi yombane uncinci, i-arc voltage iphantsi kwaye ikhoyo inkulu; kumjikelezo wesiqingatha xa isiseko sesinyithi siyi-cathode, imeko ichasene nje, i-voltage ye-arc iphezulu kwaye ikhoyo incinci. Ngenxa ye-asymmetry yangoku kwimijikelezo emibini yesiqingatha, i-AC yangoku ye-arc inokuthi ithathwe njengenxalenye ezimbini, enye yi-AC yangoku, kwaye enye yi-DC yangoku efakwe kwi-AC inxalenye, kunye neyokugqibela. yinxalenye yeDC. Isenzeko sokuba i-DC component yenziwe kwi-AC arc ibizwa ngokuba yi-rectification effect ye-tungsten AC argon arc welding. Le mpembelelo yokulungiswa ayikho kuphela ngexesha le-AC TIG ye-welding ye-aluminium, kodwa iyenzeka naxa iimpawu ezibonakalayo zezixhobo ezimbini ze-electrode zahluke kakhulu. Le ngxaki ikhona xa udibanisa ialloys ezifana nobhedu kunye ne-magnesium ene-AC. Kwanaxa izinto ezifanayo zisetyenziselwa ukuwelda kwe-AC, ngenxa yomahluko phakathi kwe-electrode kunye nejometri ye-workpiece kunye neemeko zokutshatyalaliswa kobushushu, kuya kubakho icandelo le-DC, kodwa ixabiso lincinci kwaye alichaphazeli ukusebenza okuqhelekileyo kwesixhobo.
I-Xinfa argon arc welding inomgangatho obalaseleyo kunye nokuqina olomeleleyo, ngeenkcukacha, nceda ujonge:https://www.xinfatools.com/tig-toches/
Ukuba iipropati zombane kunye ne-thermophysical yesiseko sesinyithi kunye ne-electrode zihluke, i-asymmetry ekhankanywe ngasentla iya kuba yinto enzulu kakhulu, kwaye icandelo le-DC liya kuba likhulu. Ngokuchasene noko, iipropati zombane kunye ne-thermophysical yesiseko sesinyithi kunye ne-electrode ayifani kakhulu, kwaye ukuhlukana kokushisa kobushushu phakathi kwezi zibini kubangelwa kuphela imilinganiselo yejometri eyahlukeneyo, kwaye umphumo wokulungiswa awubonakali. Ngokomzekelo, kwi-MIG welding, i-welding wire kunye ne-workpiece ngokuqhelekileyo yenziwe ngezinto ezifanayo, ngoko ke i-asymmetry ekhankanywe ngasentla ayibonakali, kwaye inxalenye encinci ye-DC ayinakuhoywa.
Ulwalathiso lwecandelo le-DC lufana nolwalathiso lwangoku kumjikelo wesiqingatha se-tungsten pole cathode, ephuma kwizinto ezisisiseko ukuya kwipali ye-tungsten, elingana nonikezelo lwamandla olulungileyo lwe-DC kwisekethe ngexesha le-welding. Ngenxa yobukho becandelo le-DC, okokuqala, ukususwa kwefilimu ye-oxide nge-cathode kuya kuba buthathaka, kwaye okwesibini, inxalenye ye-DC magnetic flux iya kuveliswa kwi-core yentsimbi ye-welding transformer, kwaye le nxalenye i-DC magnetic flux iya kubekwa phezulu kwi-original alternating flux magnetic, okwenza intsimbi engundoqo inokufikelela kwi-saturation magnetic kwicala elinye, okubangela ukwanda okukhulu kwi-excitation ye-transformer yangoku. Ngale ndlela, ngakwesinye icala, ukulahleka kwesinyithi kunye nokulahleka kobhedu kwe-transformer kuya kwanda, ukusebenza kakuhle kuya kuncipha, kwaye ukunyuka kweqondo lokushisa kuya kwanda; kwelinye icala, i-waveform ye-welding current iya kugqwethwa kakhulu, kwaye i-factor factor iya kuncitshiswa. Ezi ziya kuba nemiphumo emibi ekutshiseni okuzinzileyo kwe-arc.
Ixesha lokuposa: May-08-2023
