I-Welding Technique ye-TIG yokushisela

I-welding current ye-tungsten inert gas arc welding ivamise ukukhethwa ngokusekelwe ezintweni ezibonakalayo, ukujiya, kanye nokuma kwendawo kwendawo yokusebenza. Njengoba ukwanda kwamanje kwe-welding, ukujula kokungena kuyanda, futhi ububanzi nokuphakama okweqile kwe-weld seam kukhuphuka kancane, kodwa ukwanda kuncane. Umsinga wokushisela oweqile noma onganele ungabangela ukwakheka okungekuhle kwe-weld noma ukonakala kokushisela.

I-arc voltage ye-tungsten inert gas welding inqunywa ngokuyinhloko ubude be-arc. Njengoba ubude be-arc bukhula, i-arc voltage iyanda, ububanzi be-weld buyanda, futhi ukujula kokungena kuncipha. Uma i-arc iyinde kakhulu futhi i-arc voltage iphezulu kakhulu, kulula ukubangela ukushisela okungaphelele kanye ne-undercutting, futhi umphumela wokuvikela awumuhle.
Kodwa i-arc ayikwazi ukuba mfishane kakhulu nayo. Uma i-arc voltage iphansi kakhulu noma i-arc imfushane kakhulu, intambo yokushisela ijwayele ukujikeleza okufushane lapho ithinta i-electrode ye-tungsten ngesikhathi sokuphakela, okubangela ukuthi i-electrode ye-tungsten ishe futhi ibambe kalula i-tungsten. Ngakho-ke, ubude be-arc ngokuvamile benziwa cishe bulingane nobubanzi be-electrode ye-tungsten.

Lapho ijubane lokushisela likhuphuka, ukujula nobubanzi bokuhlanganiswa kuncipha. Uma ijubane lokushisela lishesha kakhulu, kulula ukukhiqiza ukuhlanganisa okungaphelele kanye nokungena. Uma ijubane lokushisela lihamba kancane, i-weld seam iba banzi futhi ingase ibe namaphutha njengokuvuza kwe-weld nokusha. Ngesikhathi sokushisela igesi ye-tungsten enert manual, isivinini sokushisela ngokuvamile silungiswa nganoma yisiphi isikhathi ngokusekelwe kusayizi, ukwakheka, nesimo sokuhlanganisa sechibi elincibilikisiwe.

1. Ububanzi benobhobho
Lapho ububanzi be-nozzle (ebhekisela kububanzi obungaphakathi) bukhuphuka, izinga lokugeleza kwegesi elivikelayo kufanele lenyuke. Ngalesi sikhathi, indawo evikelekile inkulu futhi umphumela wokuvikela muhle. Kodwa lapho umlomo wombhobho umkhulu kakhulu, awugcini nje ukwandisa ukusetshenziswa kwegesi ye-argon, kodwa futhi kwenza kube nzima ukubuka i-arc welding kanye nokusebenza kwe-welding. Ngakho-ke, ububanzi bombhobho osetshenziswa kakhulu ngokuvamile buphakathi kuka-8mm no-20mm.

2. Ibanga phakathi kwe-nozzle kanye ne-weldment
Ibanga phakathi kombhobho nesiqeshana sokusebenza libhekisela ebangeni eliphakathi kobuso bokuphela kombhobho kanye nendawo yokusebenza. Uma leli banga lincane, umphumela wokuvikela uba ngcono. Ngakho-ke, ibanga phakathi kwe-nozzle kanye ne-weldment kufanele libe lincane ngangokunokwenzeka, kodwa lincane kakhulu alihambisani nokubuka ichibi elincibilikisiwe. Ngakho-ke, ibanga phakathi kwe-nozzle kanye ne-weldment ngokuvamile lithathwa njenge-7mm kuya ku-15mm.

3. Ubude besandiso se-tungsten electrode
Ukuze uvimbele i-arc ekushiseni ngokweqile nasekushiseni umbhobho, ithiphu le-electrode ye-tungsten ngokuvamile kufanele lidlulele ngaphesheya kombhobho. Ibanga ukusuka kuthiphu ye-electrode ye-tungsten ukuya ebusweni bokuphela kwenobholi ubude besandiso se-electrode ye-tungsten. Ubude besandiso se-electrode ye-tungsten buncane, ibanga eliseduze phakathi kombhobho nocezu lokusebenza, futhi kuba ngcono umphumela wokuvikela. Nokho, uma lincane kakhulu, lizophazamisa ukubonwa kwechibi elincibilikisiwe.
Ngokuvamile, lapho ushisela amalunga ezinqeni, kungcono ukuthi i-electrode ye-tungsten inwebe ubude obungu-5mm kuya ku-6mm; Uma welding fillet welds, kungcono ukuba Tungsten electrode extension ubude 7mm kuya 8mm.

4. Indlela yokuvikela igesi kanye nezinga lokugeleza
Ngaphezu kokusebenzisa imibhobho eyindilinga ukuze kuvikelwe indawo yokushisela, ukushisela igesi ye-tungsten inert kungenza futhi umlomo wombhobho ube flat (njengegebe eliwumngcingo le-tungsten inert gas welding) noma ezinye izimo ngokuya ngendawo yokushisela. Uma ushisela i-root weld seam, i-back weld seam yengxenye eshiselwe izongcoliswa futhi ifakwe i-oxidized emoyeni, ngakho-ke ukuvikela emuva kwamandla emali kumele kusetshenziswe.

I-Argon ne-helium amagesi aphephe kunazo zonke ukufutha ngemuva ngesikhathi sokushisela zonke izinto zokwakha. Futhi i-nitrogen iyigesi ephephe kunazo zonke yokuvikela ukukhuphuka kwamandla emali lapho kushiselwa insimbi engagqwali nama-alloys ethusi. Ibanga lesilinganiso sokugeleza kwegesi lokuvikela ukwehla kwamandla emali emuva kwegesi ye-inert evamile lingu-0.5-42L/min.

Ukugeleza komoya okuvikelayo kubuthakathaka futhi akusebenzi, futhi kujwayele ukukhubazeka okufana ne-porosity kanye ne-oxidation yama-welds; Uma izinga lokugeleza komoya likhulu kakhulu, kulula ukukhiqiza isiphithiphithi, umphumela wokuvikela awulungile, futhi uzophinde uthinte ukushiswa okuzinzile kwe-arc.

Lapho ufaka izinsimbi zamapayipi, izindawo ezifanele zegesi kufanele zishiywe ukuze kuvinjelwe ukucindezela kwegesi ngokweqile ngaphakathi kwamapayipi ngesikhathi sokushisela. Ngaphambi kokuphela kwe-root weld bead welding, kuyadingeka ukuqinisekisa ukuthi ingcindezi yegesi ngaphakathi kwepayipi ayiphezulu kakhulu, ukuze kuvinjwe ichibi lokushisela ukuthi lingaphumi noma impande ingabi yi-concave. Uma usebenzisa igesi ye-argon ukuze uvikeleke ngemuva kokufakwa kwamapayipi ngesikhathi sokushisela, kungcono ukungena usuka phansi, uvumele umoya ukuthi uphume ubheke phezulu futhi ugcine igesi iphuma kumthungo wokushisela.