Umehluko phakathi kokushisela kwe-TIG, MIG kanye ne-MAG
1. I-TIG yokushisela ngokuvamile iyithoshi lokushisela elibanjwe ngesandla esisodwa kanye nocingo lokushisela olubanjwe kwesinye, olulungele ukushiselwa okwenziwa ngesandla sokusebenza nokulungisa izinto ezincane.
2. Ku-MIG ne-MAG, ucingo lokushisela luthunyelwa lusuka kuthoshi lokushisela ngomshini wokuphakela ucingo oluzenzakalelayo, ofanele ukushisela okuzenzakalelayo, futhi vele lungasetshenziswa ngesandla.
3. Umehluko phakathi kwe-MIG ne-MAG ikakhulukazi kugesi elivikelayo. Imishini iyafana, kodwa eyokuqala ngokuvamile ivikelwe i-argon, efanele ukushisela izinsimbi ezingenayo ayoni; lena yakamuva ngokuvamile ixutshwe ne-carbon dioxide gas esebenzayo ku-argon, futhi ifanele ukushisela insimbi enamandla amakhulu kanye nensimbi ye-alloy ephezulu.
4. I-TIG kanye ne-MIG i-inert gas shielded welding, eyaziwa ngokuthi i-argon arc welding. Igesi ye-inert ingaba i-argon noma i-helium, kodwa i-argon ishibhile, ngakho-ke ivame ukusetshenziswa, ngakho-ke i-inert gas arc welding ngokuvamile ibizwa ngokuthi i-argon arc welding.
Ukuqhathaniswa kwe-MIG welding kanye ne-TIG welding
Ukuqhathanisa i-MIG welding kanye ne-TIG welding ye-MIG (i-melting gas shielded welding) ngesiNgisi: i-metal inert-gas welding isebenzisa i-electrode encibilikayo.
Indlela yokushisela i-arc esebenzisa igesi eyengeziwe njenge-arc medium futhi ivikela amaconsi ensimbi, i-welding pool kanye nensimbi enezinga eliphezulu lokushisa endaweni yokushisela ibizwa ngokuthi i-gas metal shielded arc welding.
Indlela yokushisela ye-arc evikelekile (Ar noma He) ene-arc evikelwe ngocingo oluqinile ibizwa ngokuthi i-molten inert gas shielded welding, noma i-MIG welding kafushane.
Ukushisela kwe-MIG kuyafana nokushisela kwe-TIG ngaphandle kokuthi kusetshenziswa ucingo esikhundleni se-electrode ye-tungsten esibani. Ngakho-ke, i-welding wire iyancibilika yi-arc futhi ifakwe endaweni yokushisela. Amarola ashayelwa ngogesi aphakela intambo ukusuka ku-spool ukuya ethoshi njengoba kudingeka ekushiseleni, futhi umthombo wokushisa nawo uyi-DC arc.
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Kodwa i-polarity ihluke kakhulu kulokho okusetshenziswe ku-TIG welding. Igesi yokuvikela esetshenzisiwe nayo ihlukile, futhi i-oxygen engu-1% yengezwe ku-argon ukuze kuthuthukiswe ukuzinza kwe-arc.
Njengokushisela i-TIG, ingashisela cishe zonke izinsimbi, ifaneleka ngokukhethekile izinto zokushisela njenge-aluminium ne-aluminium alloys, ama-alloys ethusi nawethusi, nensimbi engagqwali. Cishe akukho ukulahleka kokushiswa kwe-oxidation enqubweni yokushisela, inani elincane kuphela lokulahleka kokuhwamuka, futhi inqubo ye-metallurgical ilula.
Ukushisela kwe-TIG (i-Tungsten Inert Gas Welding), eyaziwa nangokuthi i-non-melting gas tungsten welding evikelekile. Kungakhathaliseki ukuthi i-welding manual noma i-othomathikhi yensimbi engagqwali engu-0.5-4.0mm, i-TIG iyindlela evame ukusetshenziswa kakhulu.
Indlela yokwengeza i-filler wire nge-TIG welding ivame ukusetshenziselwa ukusekela i-welding yemikhumbi yokucindezela, ngoba ukuqina komoya kwe-TIG welding kungcono futhi kunganciphisa i-porosity ye-weld seam ngesikhathi sokushisela imikhumbi yokucindezela.
Umthombo wokushisa we-TIG welding yi-DC arc, i-voltage esebenzayo ingu-10-95 volts, kodwa yamanje ingafinyelela kuma-amps angu-600.
Indlela efanele yokuxhuma umshini wokushisela iwukuxhuma i-workpiece esigxotsheni esihle sokuhlinzekwa kwamandla, kanye nesigxobo se-tungsten esitoshi sokushisela njengesigxobo esibi.
Igesi ye-inert, ngokuvamile i-argon, ifakwa ngethoshi ukuze kwakheke isihlangu esizungeza i-arc nangaphezulu kwedamu lokushisela.
Ukwandisa okokufaka ukushisa, ngokuvamile i-hydrogen engu-5% yengezwa ku-argon. Kodwa-ke, lapho ushisela insimbi engagqwali ye-ferritic, i-hydrogen ayikwazi ukungezwa ku-argon.
Ukusetshenziswa kwegesi cishe amalitha angama-3-8 ngomzuzu.
Enqubweni yokushisela, ngaphezu kokuvuthela igesi ye-inert evela kuthoshi lokushisela, kungcono ukuvuthela igesi esetshenziselwa ukuvikela ingemuva le-weld ngaphansi kwe-weld.
Uma uthanda, i-weld puddle ingagcwaliswa ngocingo lokubunjwa okufanayo nokushiselwa kwe-austenitic material. Uhlobo lwe-316 filler luvame ukusetshenziswa lapho kushiselwa izinsimbi ezingenasici ze-ferritic.
Ngenxa yokuvikelwa kwegesi ye-argon, ingahlukanisa umphumela olimazayo womoya ensimbi encibilikisiwe, ngakho-ke ukushisela kwe-TIG kusetshenziswa kabanzi ekushiseleni.
Izinsimbi ezingezona ayoni ezifakwe i-oxid kalula njenge-aluminium, i-magnesium nama-alloys azo, insimbi engagqwali, ama-alloys ashisa kakhulu, i-titanium ne-titanium alloys, kanye nezinsimbi ezisebenzayo eziphikisayo (njenge-molybdenum, i-niobium, i-zirconium, njll.), kuyilapho i-carbon evamile evamile insimbi, insimbi ephansi ye-alloy, njll., i-TIG welding ngokuvamile ayisetshenziswa ngaphandle kwezikhathi ezidinga ikhwalithi ephezulu yokushisela.
Isikhathi sokuthumela: Aug-24-2023
