Aluminium, nrog nws cov cim tshwj xeeb ntawm kev ua ke, muaj zog ua kom muaj zog hauv ntau yam kev lag luam xws li kev lag luam, aerospace, thiab kev tsim kho. Txawm li cas los xij, vuam aluminium tsis yog ib txoj haujlwm yooj yim. Nws lub siab thermal conductivity, qis melting point, thiab qhov yooj yim tsim ntawm ib txheej av tawv oxide rau saum npoo ua cov kev nyuaj loj rau vuam. MIG (hlau inert roj) vuam, raws li cov qauv vuam vuam, tuaj yeem ua tiav cov txiaj ntsig vuam zoo tshaj plaws thaum tsim nyog. Yog li, yuav ua li cas Weld Aluminium nrog MIG kom ntseeg tau siab siab- zoo welds? Ntawm no yog ib phau ntawv qhia kev tshaj lij.
Pre6 - vuam npaj: lub pob zeb ntawm txoj kev vam meej
Kev ua ntej -} Kev npaj npaj yog tus yuam sij kom muaj kev vam meej mig vuam ntawm txhuas. Qhov saum npoo ntawm txhuas yog qhov ua kom sov heev thiab yooj yim reacts nrog oxygen nyob rau hauv cov huab cua los ua ib txheej ntom ntom nti oxide). Lub ntsiab lus melting ntawm cov oxide txheej yog li ntawm 3,700℃f (2,037 degree), uas yog ntau dua li ntawm txhuas nws tus kheej (1,220 degree). Yog tias nws tsis raug tshem tawm, nws yuav cuam tshuam qhov fusion ntawm cov hlau hauv paus thiab cov xua xaim, ua rau cov hlau tsis muaj zog lossis tsis xws luag zoo li porosity. Yog li ntawd, ntxuav lub vuam thaj chaw yog qhov tseem ceeb. Siv tus hlau stainless hlau txhuam uas yog siv tshwj xeeb rau txhuas (kom tsis txhob txhuam qhov chaw sib xyaw thiab txhua qhov chaw uas yuav yog ib feem ntawm Weld pas dej. Rau cov khoom siv tawv ntoo xws li roj, roj, lossis av, so thaj chaw nrog acetone los yog tshwj xeeb txhuas nqus thiab cia nws qhuav tag nrho. Tom qab tu, tsis txhob kov cov khoom ntxuav kom huv nrog txhais tes liab qab, ua cov roj tawv nqaij tuaj yeem rov qab ua paug nws.
Rau thicker aluminium (1/4 nti lossis ntau dua), beveling cov npoo ntawm 30-45℃kaum sab xis yog qhov tsim nyog los xyuas kom tag nrho cov kev nkag mus. Vim hais tias ntawm txhuas lub siab thermal conductivity, tshav kub tuaj yeem zom ua ntej lub hauv paus ntawm cov pob tawb, thiab beveling pab daws cov teeb meem no. Siv Clamps ua los ntawm txhuas lossis stainless hlau kom ruaj ntseg qhov workpiece (kom tsis txhob muaj hlau hlau clamps, uas yuav tawm ntawm cov hlau thiab ua rau corrosion) los tiv thaiv kev sib ntaus sib tua. Aluminium yog ntau tshaj qhov cuam tshuam dua li cov hlau vim nws qis qis dua.
Xaiv cov khoom tsim nyog thiab cov khoom siv tsim nyog
Mig vuam ntawm txhuas yuav tsum muaj cov khoom siv tshwj xeeb thiab cov ntaub ntawv los tiv nrog nws cov khoom ntiag tug:
- Mig Welder:Xaiv cov welder nrog lub siab - zaus pib muaj nuj nqi (los tiv thaiv cov electrode ntawm cov khoom hluav taws xob (los kho cov hluav taws xob thiab cov xaim hluav taws xob thiab cov hlau. Ib qho welder nrog ntau ntawm cov 130-300 amps yog tsim nyog rau feem ntau aluminium vuam projects (rau txhuas nrog ib qho tuab ntawm 1 / {{} nti). Rau cov ntaub muag muag txhuas (muaj ntau yam hauv Mig VUAM), ib rab phom spool los yog laub {{9} Rub hlau feeder yog ib qho yuav tsum tau ua. Cov tshuab no txo kev sib txhuam, tiv thaiv cov hlau kinking lossis jamming uas yuav cuam tshuam rau arc.
- Tus tub lim hlau:Cov xua hlau yuav tsum phim lub hauv paus txhuas alloy . 4043 yog qhov ntau tshaj plaws, ua haujlwm zoo nrog 6061 (dav} lub hom phiaj) alloys. Nws ntws zoo thiab cov ntawv muaj zog, ductile vsard. Txog siab -} lub zog siv (xws li aerospace), 5356 yog qhov zoo dua. Nws yog sib xws nrog 5052 thiab 5083 alloys tab sis yuav tsum muaj ntau cov lus tawm tshiab. Xaiv cov cheeb tsam uas tsim nyog raws li cov ntaub tuab: {} nti rau 1 / {} nti aluminium, thiab {} nti rau cov tuab tuab rau cov tuab.
- Kev thaiv cov roj:Ntshiab Argon yog tus qauv thaiv cov roj rau mig vuam ntawm txhuas. Nws muab cov txheej txheem hluav taws xob ua haujlwm ruaj khov, zom cov txheej oxide, thiab tiv thaiv lub pas dej weld los ntawm cov paug ntawm covmom. Cov pa roj ntws tsawg ntawm 20-30 cubic feet ib teev (CFH). Tus nqi txo qis heev tuaj yeem ua rau oxidation, thiab tus nqi ntau dhau tuaj yeem ua rau muaj cua.
Teeb tsa kho qhov chaw vuam
Aluminium muaj siab thermal condal conductivity, txhais tau nws dissipates kub sai sai, yog li nws yuav tsum muaj ntau lub tswv yim cua sov dua li cov hlau. Qhov tseeb voltage, hlau pub ceev ceev (WFS), thiab kev mus ncig ua si yog qhov tseem ceeb heev kom tsis txhob poob siab (khaub thuas welds) lossis hlawv- los ntawm.
- Voltage thiab hlau pub ceev:Ob qho no yog sib cuam tshuam zoo. Cov kav dej pub ceev ceev tswj qhov amperage, thiab cov voltage txiav txim siab txog qhov ntev ntev. Rau 0.035 - nti hlau thiab 1 / {} nti aluminium, pib nrog 18-22-350 nti ib feeb (IPM). Rau 0.045 - nti hlau thiab 1 / {}} nti aluminium, cov tshuaj pom zoo thiab cov xaim pub ceev ceev ntawm 200-300 ipm. Nws yog qhov zoo tshaj plaws rau kev sim rau cov khoom seem ua ntej. Yog tias tus weld yog heev "txias" (ntxeem tau thiab tsis xwm yeem), ntxiv cov hlau pub ceev lossis voltage; Yog hlawv -} los ntawm tshwm sim, txo lawv.
- Polarity:Siv ncaj qha rau electrode zoo (DCEP). Cov polarity concentrates cua sov ntawm lub workpiece (tsis yog xaim), kom muaj cov hlau tso tawm txaus thiab pab kom tawg cov oxide txheej.
- Hu rau cov lus thiab tam sim no:Siv cov lus qhia loj dua (txuam nrog cov kab hlau voos) nrog lub duav du kom tiv thaiv cov hlau hlau. Ib 3 / 4 - nti inter lizzle muab cov roj av zoo dua li cov neeg me dua, tshwj xeeb tshaj yog rau tuab txhuas.
Mastering Vuam cov txheej txheem
Txawm tias muaj kev npaj zoo tag nrho thiab ntsuas qhov chaw, cov kev txiav txim siab vuam txiav txim siab zaum kawg weld zoo:
- Phom Lub Qub Zog thiab Kev Mus Ncig:Tswj lub kaum sab xis 10-15 kawm tiav lub kaum sab xis (thawb phom tawm ntawm lub pas dej weld) coj los thaiv cov pa hluav taws xob hla lub pas dej thiab pab ua kom tawg oxides. Khaws ib qho kev taug kev khov kho, uas yuav tsum tau nrawm dua thaum vuam hlau, kom tiv thaiv kev kub ntxhov. Yog tias lub pas dej weld dhau los ua loj dhau lossis sags, nce kev mus ncig ua si; Yog fusion tsis zoo, qeeb me ntsis.
- Lo - tawm:Khaws lub hlau stick -} tawm (qhov kev ncua deb ntawm cov ncauj lus sib tiv thaiv) luv luv) luv luv) luv luv, ntawm 1/4 thiab 3/8 nti. Ib lub pas ntev dua - tawm yuav ua rau muaj hluav taws xob poob, ua rau muaj kev sib kub tsis ruaj khov thiab ua kom sov tsis txaus.
- Arc Leng Lwj:Taw rau luv luv thiab zoo sib xws arc. Lub arc ntev yuav ua rau muaj lub ntsej muag, porosity, thiab oxide suav nrog. Lub "hissing" lub suab hais tias ib lub arc ruaj khov.
- Nws:Zam kev tawm heev tab sis, raws li nws nce tawm cov kev tawm tshiab thiab ua rau muaj kev sib yuav. Rau pob qij txha dav dua li cov kab hlau tshaj plaws, siv lub zog zigzag dav (1-2 xaim diamiters dav) kom paub meej tias fusion tsis muaj overheating.
Ncej -} vuam kuaj thiab txij nkawm
Tom qab vuam, cia tus ua haujlwm txias ib txwm muaj. Quenching nrog dej yuav ua rau muaj kev ntxhov siab thiab tawg. Tshawb xyuas Weld rau cov hauv qab no:
- Porosity:Cov qhov me me tshwm sim los ntawm kev sib kis, tiv thaiv kev tiv thaiv tsis txaus, lossis roj tsis raug. Cov qhov tsis muaj zog ntawm weld thiab txo nws cov xeb tsis kam.
- Hlawv -} los ntawm:Qhov no yog lub cim ntawm ntau dhau los yog qeeb mus ncig ua si.
- Tsis muaj fusion:Pom qhov khoob ntawm Weld thiab cov hlau hauv paus, feem ntau tshwm sim los ntawm cov cua sov tsis txaus lossis nrawm nrawm mus ncig ua si nrawm.
- Discoloration:Lub ntsej muag daj lossis dub los yog dub tint qhia oxidation, uas yog lub cim ntawm kev tiv thaiv tsis zoo.
Rau cov ntawv thov tseem ceeb (xws li cov tub rog marine), tshaj tawm {{{}} Weld tu tau yuav tsum tau. Siv cov hlau stainless txhuam kom tshem tawm tau lub ntsej muag, tom qab ntawd etch nrog cov kua roj Oxides kom tshem tawm cov npoo oxides thiab kho kom haum corrosion.
Kev daws teeb meem cov teeb meem nquag
- Cov Ntaus Ntaus Cov Hlau Hlau: Yog tias cov hlau kinks lossis jams, kos rau ib lub taub hau npog, ib qho kev qias neeg, lossis tsis muaj tseeb. Ib rab phom spool tuaj yeem daws cov teeb meem pub tshaj plaws rau cov xov hlau txhuas cov hlau.
- Porosity: Xyuas kom cov workpiece huv si, cov roj flow yog qhov txaus, thiab rab phom nozzle tsis txhaws nrog lub tis.
- Warping: Siv Clamps lossis Fixtures kom ruaj ntseg qhov workpiece, thiab rau cov pob qij txha ntev, siv cov txheej txheem sib tw (vuam luv ntu nrog cua txias).
Cov lus qhia kawg rau kev ua tiav
Xyaum ntawm seem ua ntej, nyiam dua nrog tib qho alloy thiab tuab raws li koj qhov project. Aluminium coj txawv ntawm cov hlau, yog li siv sijhawm los hloov kho nws cov cua sov. Khaws cov ntaub ntawv huv si: cov ntaub ntawv qias neeg lossis cov lus sib tiv tauj tuaj yeem rhuav tshem tau qhov zoo tshaj plaws- npaj ua haujlwm. Nco ntsoov tias mig vuam ntawm txhuas yog hais txog kev sib npaug kub, tiv thaiv, thiab txheej txheem. Mastering Qhov Tshuav Qhov Tshuav yuav tso cai rau koj los tsim cov muaj zog thiab corrosion - tsis kam welds.
Raws li txhuas txuas ntxiv mus hloov cov ntaub ntawv hnyav tshaj hauv kev tsim khoom niaj hnub, ua kom pom tseeb ntawm lub ntsej muag vuam ntawm txhuas tau ua cov txuj ci tseem ceeb. Los ntawm kev ua raws li cov lus qhia no, koj yuav muaj peev xwm ntseeg siab tau ntau yam haujlwm, los ntawm automotive nkhaus mus rau kev cai fabriccations.
