Aluminium welding yog ib qho txuj ci tseem ceeb hauv ntau yam kev lag luam, los ntawm automotive mus rau aerospace, vim aluminium lub teeb yuag thiab corrosion-resistant zog. Txawm li cas los, welding aluminium poses tshwj xeeb cov kev cov nyom vim nws cov thermal conductivity thiab tsawg melting point. Qhov blog no yuav qhia koj txog qhov tseem ceeb ntawm yuav ua li cas vuam aluminium, muab kev nkag siab txog kev kov yeej cov kev cov nyom thiab ua kom muaj zog, ruaj welds.

Nkag siab txog Aluminium Vuam

Ua ntej dhia mus rau hauv qhov tshwj xeeb ntawm vuam aluminium, Nws yog ib qho tseem ceeb kom nkag siab txog cov khoom ntawm txhuas uas cuam tshuam rau nws cov weldability:

• High Thermal conductivity: Aluminium ua kom sov sai sai, uas txhais tau tias nws muaj peev xwm dissipate tshav kub los ntawm weld cheeb tsam sai heev. Qhov no yuav tsum muaj cua sov ntau dua thaum lub sij hawm vuam piv rau cov hlau.
• Tsawg Melting Point: Aluminium alloys yaj ntawm ib ncig ntawm 600 ° C, qis dua hlau. Qhov no tuaj yeem ua rau muaj kev pheej hmoo siab kub hnyiab yog tias tsis ceev faj.
• Oxide Txheej: Aluminium ib txwm tsim cov txheej txheem oxide uas siab dua hauv cov ntsiab lus melting dua li cov hlau hauv qab. Cov txheej no yuav tsum tau muab tshem tawm kom ua tiav vuam.

Xaiv txoj kev vuam txoj cai

Feem ntau txoj hauv kev rau vuam aluminium yog Gas Tungsten Arc Vuam (GTAW, lub TIG) thiab Gas Hlau Arc Vuam (GMAW, lub MIG). Nov yog qhov lawv sib piv:

• TIG Welding: Zoo tagnrho rau cov ntaub ntawv nyias thiab zoo, cov haujlwm ntxaws. Nws muab cov welder tswj ntau dua ntawm cov vuam dua li lwm txoj hauv kev, ua rau nws zoo meej rau high-quality, meej welds.
• MIG Vuam: Zoo dua haum rau cov tuab tuab tuab thiab vuam nrawm dua. Nws feem ntau yooj yim kawm thiab zam txim ntau dua li TIG, txawm nws yuav ua tau tsawg dua.

Khoom siv thiab kev npaj

Pib welding aluminium, koj yuav xav tau cov cuab yeej zoo. TIG welding, koj yuav xav tau:

• AC muaj peev xwm TIG welder
• High-frequency pib muaj peev xwm
• Ntshiab tungsten los yog zirconated tungsten electrode
• Argon tiv thaiv roj
• Tsim nyog cov ntaub ntawv muab tub lim, 4043 hlau alloy (Al-Yog) thiab 5356 hlau alloy (Al-Mg) feem ntau yog siv cov khoom siv hlau

Rau MIG vuam:

• MIG welder nrog lub tshuab ua haujlwm aluminium-tshaj
• Argon los yog argon-helium mix rau shielding roj
• Ib rab phom rab phom los yog rab phom laub los tiv thaiv cov teeb meem pub mis

Kev npaj Nws yog ib qho tseem ceeb thaum welding aluminium. Ntxuav cov khoom kom huv si kom tshem tau cov roj, av, thiab tshwj xeeb tshaj yog cov oxide txheej. Kev tshem tawm tshuab (txhuam hlau) los yog kev siv tshuaj lom neeg tuaj yeem siv los xyuas kom cov txhuas tsis muaj kab mob ua ntej koj pib.

Yog xav paub ntxiv txog aluminium welding, thov xa mus rau ‘Aluminium Vuam: Phau Ntawv Qhia Txog Tswv Yim‘

Cov txheej txheem vuam

• Preheating: Nyob ntawm qhov tuab thiab hom aluminium, preheating tuaj yeem pab tswj cov cua sov dissipation thiab tsis txhob thermal distortion.
• Push Technique: Thaum MIG vuam, siv cov txheej txheem thawb, qhov twg lub teeb yog angled nyob rau hauv cov kev taw qhia ntawm lub weld, thawb lub pas dej nrog. Qhov no muab cov pa roj zoo dua thiab cov welds huv.
• Puddle Control: Aluminium's fluidity txhais tau hais tias kev tswj cov weld puddle yog qhov tseem ceeb. Ua tib zoo saib xyuas lub pas dej weld qhov loj thiab tus cwj pwm, kho koj ceev thiab lub zog raws li.

Troubleshooting Common Problems

• Porosity: Qhov no tuaj yeem tshwm sim los ntawm kev sib kis, tsis raug shielding gas, los yog noo noo ntau dhau. Xyuas kom txhua yam huv si thiab qhuav thiab tias koj siv hom thiab cov pa roj.
• Kev tawg: Aluminium yog feem ntau tawg, tshwj xeeb tshaj yog thaum kawg ntawm qhov vuam. Tiv thaiv qhov no, xyuas kom cov kev sib koom ua ke tsim nyog thiab cov khoom yog preheated yog tias tsim nyog. Ntxiv cov khoom muab tub lim rau qhov kawg ntawm qhov vuam tuaj yeem pab tau.
• Distortion: Vim nws cov khoom thermal, aluminium tuaj yeem warp dramatically thaum welded. Kom tawm tsam qhov no, siv kev sib koom ua ke kom zoo, khoom siv, thiab tack welds tuav txhua qhov chaw.

Wrapping Up

Vuam aluminium yuav tsum nkag siab nws cov khoom tshwj xeeb thiab hloov kho koj cov txheej txheem kom haum rau lawv. Nrog kev xyaum, cov khoom siv zoo, thiab kev npaj txhij txhua, koj tuaj yeem paub qhov kos duab ntawm aluminium welding, ua txhua yam los ntawm kev kho yooj yim mus rau kev sib dhos ua tau. Seb koj xaiv TIG lossis MIG txoj kev, kev ua siab ntev thiab precision yuav coj koj mus rau kev vam meej thiab muaj zog welds nyob rau hauv no nyuaj tab sis khoom plig.