1. Okubalulekile kwezobuchwepheshe kwe-argoni-tungsten arc welding
1.1 Ukukhethwa komshini wokushisela we-tungsten argon arc namandla polarity
I-TIG ingahlukaniswa ibe yi-DC kanye ne-AC pulses.I-DC pulse TIG isetshenziselwa kakhulu ukushisela insimbi, insimbi emnene, insimbi engashisi, njll., futhi i-AC pulse TIG isetshenziselwa kakhulu ukushisela izinsimbi ezikhanyayo ezifana ne-aluminium, i-magnesium, ithusi nama-alloys azo.Kokubili ama-pulses e-AC kanye ne-DC asebenzisa amandla kagesi anezici zokuwa, futhi ukushisela kwe-TIG kwamashidi ensimbi engagqwali kuvame ukusebenzisa uxhumano oluhle lwe-DC.
1.2 Izinto ezibalulekile zobuchwepheshe zokushisela i-argon tungsten arc
1.2.1 I-arc eshayayo
Kunezinhlobo ezimbili ze-arc ignition: ukungathinteki kanye ne-short-circuit arc ignition.I-electrode yangaphambili ayixhumani ne-workpiece futhi ifanele kokubili i-DC ne-AC welding, kanti lena yokugcina ifaneleka kuphela i-DC welding.Uma indlela ye-short-circuit isetshenziselwa ukushaya i-arc, i-arc akufanele iqalwe ngokuqondile kwi-weldment, ngoba kulula ukubangela ukufakwa kwe-tungsten noma ukuhlanganiswa ne-workpiece, i-arc ayikwazi ukuzinziswa ngokushesha, futhi i-arc kulula ukuyifaka. ngena ezintweni eziyisisekelo, ngakho-ke ipuleti lesiteleka se-arc kufanele lisetshenziswe.Faka ipuleti lethusi elibomvu eduze kwephoyinti le-arc, qala i-arc kuyo kuqala, bese udlulela engxenyeni ezoshiselwa ngemva kokuba ithiphu le-tungsten lishiselwe ezingeni lokushisa elithile.Ekukhiqizeni kwangempela, i-TIG ivamise ukusebenzisa i-arc starter ukuze iqale i-arc.Ngaphansi kwesenzo se-pulse current, igesi ye-argon i-ionized ukuze iqalise i-arc.
1.2.2 I-tack welding
Ngesikhathi se-tack welding, intambo yokushisela kufanele ibe mncane kunocingo oluvamile lokushisela.Ngenxa yokushisa okuphansi nokupholisa ngokushesha ngesikhathi sokushisela, i-arc ihlala isikhathi eside, ngakho kulula ukuyishisa.Lapho wenza i-spot welding, ucingo lokushisela kufanele lubekwe endaweni yokushisela, futhi i-arc izinzile.
1.2.3 Ukushisela okujwayelekile
Lapho i-TIG evamile isetshenziselwa ukushisela amashidi ensimbi engagqwali, yamanje ithatha inani elincane, kodwa lapho yamanje ingaphansi kuka-20A, i-arc drift kulula ukwenzeka, futhi izinga lokushisa lendawo ye-cathode liphezulu kakhulu, okuzobangela ukulahlekelwa ukushisa. endaweni yokushisela kanye nezimo ezimbi zokukhishwa kwe-electron, okuholela ekutheni Indawo ye-cathode ihlale igxuma futhi kunzima ukugcina i-soldering evamile.Uma i-pulsed TIG isetshenziswa, umthamo wamanje ophakeme ungenza i-arc izinze, ukuqondisa kuhle, futhi isisekelo sensimbi kulula ukuncibilika futhi sakheke, futhi imijikelezo iyashintshaniswa ukuze kuqinisekiswe ukuqhubeka kahle kwenqubo yokushisela.amashisela.
2. Ukuhlaziywa kokushisela kweshidi lensimbi engagqwali
Izakhiwo ezibonakalayo kanye nokuma kweshidi lensimbi engagqwali kuthinta ngqo ikhwalithi ye-weld.Ishidi lensimbi engagqwali line-conductivity encane eshisayo kanye ne-coefficient enkulu yomugqa wokunweba.Lapho izinga lokushisa lokushisela lishintsha ngokushesha, ukucindezeleka okushisayo okukhiqizwayo kukhulu, futhi kulula ukubangela ukushiswa, ukuguqulwa kwe-undercut kanye ne-wave deformation.Ukushiselwa kwamashidi ensimbi engagqwali ngokuvamile kusebenzisa i-flat butt welding.Ichibi elincibilikisiwe lithinteka kakhulu amandla e-arc, amandla adonsela phansi ensimbi yechibi elincibilikisiwe kanye nokushuba kwangaphezulu kwensimbi yechibi elincibilikisiwe.Lapho ivolumu, ikhwalithi nobubanzi obuncibilikisiwe bensimbi yechibi elincibilikisiwe ihlala njalo, ukujula kwechibi elincibilikisiwe kuncike ku-arc.Usayizi, ukujula kokungena namandla e-arc kuhlobene namandla okushisela, futhi ububanzi bokuhlanganisa bunqunywa i-arc voltage.
Uma umkhulu umthamo wechibi elincibilikisiwe, kukhulu ukushuba kwendawo.Lapho ukungezwani okungaphezulu kungakwazi ukulinganisa amandla e-arc namandla adonsela phansi ensimbi yechibi elincibilikisiwe, kuzokwenza ukuthi ichibi elincibilikisiwe lishise, futhi lizoshiswa futhi lipholiswe endaweni ngesikhathi senqubo yokushisela, okubangela ukushisela ku-Inhomogeneous stress and strain, lapho ukufinyezwa kwe-longitudinal komthungo we-weld kubangela ukucindezeleka onqenqemeni lwepuleti elincanyana ukuba lidlule inani elithile, kuzokhiqiza ukuguquguquka okukhulu kwamagagasi futhi kuthinte ikhwalithi yomumo we-workpiece.Ngaphansi kwendlela efanayo yokushisela kanye nemingcele yenqubo, izimo ezihlukene zama-electrode e-tungsten zisetshenziselwa ukunciphisa okokufaka kokushisa endaweni ehlangene yokushisela, okungaxazulula izinkinga zokushiswa kwe-weld kanye nokuguqulwa kwe-workpiece.
3. Ukusetshenziswa kwe-manuwali ye-tungsten argon arc welding ku-stainless steel sheet welding
3.1 Umgomo wokushisela
I-Argon tungsten arc welding iwuhlobo lwe-arc welding evulekile ene-arc ezinzile kanye nokushisa okugxilile.Ngaphansi kokuvikelwa kwegesi ye-inert (i-argon gas), ichibi lokushisela lihlanzekile futhi ikhwalithi ye-weld seam yinhle.Nokho, lapho Welding insimbi engagqwali, ikakhulukazi austenitic insimbi engagqwali, ngemuva weld futhi kudingeka uvikelwe, kungenjalo i-oxidation sína kuzokwenzeka, okuzothinta ukwakheka weld nokusebenza Welding.
3.2 Izici zokushisela
Ukushiselwa kwamashidi ensimbi engagqwali kunezici ezilandelayo:
I-1) I-conductivity eshisayo yeshidi lensimbi engenasici impofu, futhi kulula ukuyishisa ngokuqondile.
2) Ayikho i-welding wire edingekayo ngesikhathi sokushisela, futhi isisekelo sensimbi sihlanganiswe ngokuqondile.
Ngakho-ke, ikhwalithi ye-stainless steel sheet welding ihlobene eduze nezici ezifana nabaqhubi, imishini, izinto zokwakha, izindlela zokwakha, imvelo yangaphandle kanye nokuhlolwa ngesikhathi sokushisela.
Enqubweni yokushisela amashidi ensimbi engagqwali, izinto ezisetshenziswayo zokushisela azidingeki, kepha izidingo zezinto ezilandelayo ziphakeme kakhulu: enye ukuhlanzeka kwegesi ye-argon, izinga lokugeleza kanye nesikhathi sokugeleza kwe-argon, kanti enye i-tungsten i-electrode.
1) I-Argon
I-Argon iyigesi engasebenzi, futhi akulula ukusabela nezinye izinto zensimbi namagesi.Ngenxa yomphumela wokupholisa we-airflow yayo, indawo ye-weld ethintekile ukushisa incane, futhi ukuguqulwa kwe-weldment kuncane.Yigesi evikelayo ekahle kakhulu yokushisela i-argon tungsten arc.Ukuhlanzeka kwe-argon kumele kube kukhulu kuno-99.99%.I-Argon isetshenziselwa ukuvikela ngempumelelo ichibi elincibilikisiwe, ukuvimbela umoya ekugugulekeni kwechibi elincibilikisiwe futhi kubangele i-oxidation ngesikhathi senqubo yokushisela, futhi ngesikhathi esifanayo ihlukanise ngokuphumelelayo indawo yokushisela emoyeni, ukuze indawo yokushisela ivikelwe futhi ukusebenza kwe-welding kuyathuthukiswa.
2) I-electrode ye-Tungsten
Ubuso be-electrode ye-tungsten kufanele bushelelezi, futhi isiphetho kufanele sicijwe ngokugxila okuhle.Ngale ndlela, ukuthungela kwe-arc yemvamisa ephezulu kuhle, ukuzinza kwe-arc kuhle, ukujula kwe-welding kujulile, ichibi elincibilikisiwe lingagcinwa lizinzile, umthungo we-weld wakheke kahle, kanye nekhwalithi yokushisela yinhle.Uma ingaphezulu le-electrode ye-tungsten ishisiwe noma kuneziphambeko ezinjengokungcola, ukuqhekeka, kanye nezimbotshana ezinciphayo ebusweni, kuzoba nzima ukuqala i-arc high-frequency ngesikhathi sokushisela, i-arc izobe ingazinzile, i-arc izoba nzima. ukukhukhuleka, ichibi elincibilikisiwe lizohlakazeka, indawo engaphezulu izokhula, ukujula kokungena kuzobe kuncane, futhi umthungo wokushisela uzolimala.Ukwakheka okubi, izinga lokushisela elimpofu.
4 Isiphetho
1) Ukuzinza kwe-argon tungsten arc welding kuhle, futhi umumo ohlukile we-electrode we-tungsten unethonya elikhulu kukhwalithi yokushisela yamashidi ensimbi engagqwali.
2) I-Tungsten electrode welding ene-flat top kanye nethiphu eyi-conical ingathuthukisa izinga lokubunjwa kwe-welding ehlangothini olulodwa kanye nokushisela okuhlangene kabili, ukunciphisa indawo ethinteke ukushisa yokushisela, umumo we-weld muhle, kanye nezakhiwo ezibanzi zemishini zingcono.
3) Ukusebenzisa indlela yokushisela efanele kungavimbela ngempumelelo amaphutha e-welding.
Isikhathi sokuthumela: Jul-18-2023