Lihlomo tsa lihlomo tsa litšepe tse fumanehang bakeng sa ho loants'a mosebetsi oa ho lokisa litšepe li eketsehile haholo ho theosa le lilemo, ho kenyeletsoa lethathamo la litlhaku tsa alfabeta.
Haeba u ka holimo ho lilemo tse 50, mohlomong u ithutile ho tjheseletsa ka mochini oa tjheseletsa oa SMAW (Shielded Metal Arc kapa Electrode).
Lilemong tsa bo-1990 ho ile ha re tlisetsa boiketlo ba ho cheselletsa MIG (metal inert gas) kapa FCAW (flux-cored arc welding), e ileng ea etsa hore li-buzzers tse ngata li tlohele mosebetsi. Haufinyane tjena, theknoloji ea TIG (tungsten inert gas) e kene ka har'a mabenkele a temo e le mokhoa o nepahetseng oa ho kopanya letlapa la tšepe, aluminium le tšepe e sa hloekang.
Botumo bo ntseng bo eketseha ba li-welders tse nang le merero e mengata joale bo bolela hore lits'ebetso tsohle tse 'ne li ka sebelisoa ka har'a sephutheloana se le seng.
Ka tlase ho na le lithuto tse khutšoane tsa welding tse tla ntlafatsa tsebo ea hau bakeng sa liphetho tse tšepahalang, ho sa tsotelehe hore na u sebelisa mokhoa ofe oa ho cheselletsa.
Jody Collier o nehetse mosebetsi oa hae ho koetlisa litšepe le ho koetlisa litšepe. Liwebsaete tsa hae Weldingtipsandtricks.com le Welding-TV.com li tletse malebela le maqheka a sebetsang bakeng sa mefuta eohle ea ho cheselletsa.
Khase e ratoang bakeng sa welding ea MIG ke carbon dioxide (CO2). Leha CO2 e na le moruo ebile e loketse ho theha litšepe tse tebileng tse kenang ka har'a litšepe tse teteaneng, khase ena e sireletsang e ka chesa haholo ha ho chesetsoa litšepe tse tšesaane. Ke kahoo Jody Collier a khothalletsang ho fetohela ho motsoako oa 75% argon le 25% carbon dioxide.
"Oh, o ka sebelisa argon e hloekileng ho MIG weld aluminium kapa tšepe, empa ke lisebelisoa tse tšesaane feela," o boletse joalo. Ntho e 'ngoe le e' ngoe e entsoe ka li-argon tse hloekileng.
Collier o hlokomela hore ho na le metsoako e mengata ea khase 'marakeng, e kang helium-argon-CO2, empa ka linako tse ling ho thata ho e fumana ebile e theko e boima.
Haeba u lokisa tšepe e sa hloekang polasing, u tla hloka ho eketsa metsoako e 'meli ea 100% argon kapa argon le helium bakeng sa aluminium ea ho cheselletsa le motsoako oa 90% argon, 7.5% helium le 2.5% carbon dioxide.
The permeability ea MIG weld e itšetlehile ka khase e sireletsang. Carbon dioxide (ka holimo ka ho le letona) e fana ka welding e tebileng ea ho kenella ha e bapisoa le argon-CO2 (holimo ka ho le letšehali).
Pele u etsa arcing ha u lokisa aluminium, etsa bonnete ba hore u hloekisa weld ka botlalo ho qoba ho senya weld.
Ho hloekisa weld ho bohlokoa hobane alumina e qhibiliha ho 3700 ° F 'me litšepe tsa motheo li qhibiliha ka 1200 ° F. Ka hona, oxide leha e le efe (oxidation kapa white corrosion) kapa oli holim'a sebaka se lokisitsoeng se tla thibela ho kenella ha tšepe ea ho tlatsa.
Ho tlosa mafura ho tla pele. Joale, 'me ke ka nako eo feela, ts'ilafalo ea oxidative e lokelang ho tlosoa. Seke oa fetola odara, ho lemosa Joel Otter oa Miller Electric.
Ka ho eketseha ha botumo ba mechine ea ho tjheseletsa ka terata lilemong tsa bo-1990, litšepe tse lekiloeng tsa 'nete tsa linotsi li ile tsa qobelloa ho bokella lerōle lihukung tsa mabenkele.
Ho fapana le li-buzzers tsa khale tse neng li sebelisoa feela bakeng sa ho fapanyetsana ha hona joale (AC), li-welders tsa morao-rao li sebetsa ka bobeli ba hona joale le hona joale (DC), ho fetola polarity ka makhetlo a 120 ka motsotsoana.
Melemo e fanoang ke phetoho ena e potlakileng ea polarity e mengata haholo, ho kenyelletsa ho qala habonolo, ho thella ho fokolang, ho fokotseha ho fokolang, li-welds tse khahlehang haholoanyane, le ho chesehela habonolo ho ea holimo le holimo.
Ho kopantsoe le taba ea hore ho cheselletsa lithupa ho hlahisa litšepe tse tebileng, ho molemo bakeng sa mosebetsi oa kantle (MIG shielding gas e fefoloa ke moea), e sebetsa ka katleho ka thepa e teteaneng, 'me e chesa ka mafome, litšila le pente. Mechini ea welding le eona e ea nkeha habonolo ebile e bonolo ho e sebetsa, kahoo o ka bona hore na hobaneng mochini o mocha oa li-electrode kapa multi-processor welding o bohlokoa ho tsetela.
Joel Orth oa Miller Electric o fana ka lintlha tse latelang tsa electrode. Ho fumana lintlha tse ling etela: millerwelds.com/resources/welding-guides/stick-welding-guide/stick-welding-tips.
Khase ea haerojene ke kotsi e tebileng ea ho cheselletsa, e bakang tieho ea ho cheselletsa, ho phatloha ha HAZ ho etsahalang lihora kapa matsatsi kamora hore tjheseletso e phetheloe, kapa ka bobeli.
Leha ho le joalo, tšokelo ea haedrojene hangata e felisoa habonolo ka ho hloekisa tšepe hantle. E tlosa oli, mafome, pente le mongobo ofe kapa ofe kaha ke mohloli oa hydrogen.
Leha ho le joalo, haedrojene e lula e le tšokelo ha ho chesetsoa tšepe e matla a phahameng (e sebelisoang haholo thepa ea morao-rao ea temo), litšepe tse teteaneng, le libakeng tse thibetsoeng haholo. Ha u lokisa lisebelisoa tsena, etsa bonnete ba hore u sebelisa electrode e tlaase ea hydrogen le ho futhumatsa sebaka sa weld.
Jody Collier o bontša hore masoba a seponche kapa lipululana tsa moea tse hlahang holim'a cheseletso ke sesupo se tiileng sa hore weld ea hau e na le porosity, eo a e nkang e le bothata ba pele ba ho cheselletsa.
Weld porosity e ka nka mefuta e mengata, ho kenyelletsa le masoba a holim'a metsi, li-wormholes, craters le cavities, tse bonahalang (ka holim'a metsi) le tse sa bonahaleng (ka hare ho weld).
Collier o boetse oa eletsa, “E-re letamo le lule le qhibilihile nako e teletsana, e leng se etsang hore khase e tsoe ka har’a cheseletso pele e hoama.”
Le hoja li-diameter tse tloaelehileng tsa terata li le 0.035 le 0.045 lisenthimithara, mohala o monyenyane oa bophara o etsa hore ho be bonolo ho theha weld e ntle. Carl Huss oa Lincoln Electric o khothaletsa ho sebelisa terata ea 0.025 ″, haholo ha ho chesetsoa lisebelisoa tse tšesaane tse 1/8 ″ kapa ka tlase.
O tlhalositse fa bontsi jwa ditshipi di na le mokgwa wa go dira ditshipi tse di leng ditona, tse di ka felelang di tshuba. terata e nyane ea bophara e fana ka weld e tsitsitseng haholoanyane maemong a tlase e etsang hore e seke ea chesoa.
E-ba hlokolosi ha u sebelisa mokhoa ona ho lisebelisoa tse teteaneng (3⁄16″ le tse teteaneng), kaha terata e bophara ba 0.025″ e ka baka ho se qhibidihe ho lekaneng.
Hang ha lihoai li batla tsela e betere ea ho tjheseletsa litšepe tse tšesaane, aluminium le tšepe e sa hloekang, li-welders tsa TIG li se li ata haholo mabenkeleng a mapolasi ka lebaka la botumo bo ntseng bo eketseha ba li-welder tse ngata.
Leha ho le joalo, ho ipapisitse le boiphihlelo ba motho, ho ithuta welding ea TIG ha ho bonolo joalo ka ho ithuta welding ea MIG.
TIG e hloka matsoho a mabeli (e 'ngoe ea ho tšoara mohloli oa mocheso letsatsing le chesang la tungsten electrode, e' ngoe e le ho fepa molamu oa ho tlatsa ka har'a arc) le leoto le le leng (ho sebetsa pedal ea leoto kapa molaoli oa hona joale o behiloeng holim'a lebone) Ho sebelisoa mekhoa e meraro ea ho hokahanya ho sebelisoa ho qala, ho lokisa le ho emisa phallo ea hona joale).
E le ho qoba liphello tse kang tsa ka, ba qalang le ba batlang ho ntlafatsa tsebo ea bona ba ka sebelisa monyetla oa ho sebelisa malebela ana a TIG, ho latela mantsoe a moeletsi oa Miller Electric Ron Covell, Litlhahiso tsa Welding: Lekunutu la Katleho ea TIG Welding.
Bokamoso: Liehe bonyane metsotso e 10. Lintlha li fanoe "joalo ka" molemong oa tlhahisoleseling feela eseng molemong oa khoebo kapa likhothaletso. Ho bona tieho eohle ea phapanyetsano le lipehelo tsa ts'ebeliso, bona https://www.barchart.com/solutions/terms.