Ib qho hluav taws xob arc yog ib qho hluav taws xob tawm uas tshwm sim ntawm ob lub electrodes, lossis ib qho hluav taws xob thiab cov khoom ua haujlwm, thiab uas tso cai rau ob lossis ntau qhov sib koom ua ke los ntawm vuam.
Lub vuam arc, nyob ntawm qhov chaw uas nws tshwm sim, muab faib ua ob peb pawg. Nws tuaj yeem qhib, kaw, thiab tseem nyob hauv ib puag ncig ntawm cov pa tiv thaiv.
Ib qho qhib arc ntws hauv huab cua qhib los ntawm ionization ntawm cov khoom hauv thaj chaw combustion, nrog rau vim cov hlau vapors ntawm cov khoom siv welded thiab cov khoom siv electrode. Lub kaw arc, nyob rau hauv lem, hlawv nyob rau hauv lub flux txheej. Qhov no tso cai rau koj los hloov cov muaj pes tsawg leeg ntawm gaseous nruab nrab nyob rau hauv combustion cheeb tsam thiab tiv thaiv cov hlau ntawm lub workpieces los ntawm oxidation. Hauv qhov no, cov hluav taws xob arc ntws los ntawm cov hlau vapors thiab ions ntawm flux additive. Lub arc uas hlawv nyob rau hauv ib puag ncig tiv thaiv roj ntws los ntawm cov ions ntawm cov pa thiab vaporhlau. Qhov no kuj pab tiv thaiv oxidation ntawm qhov chaw, thiab, yog li ntawd, ua kom muaj kev ntseeg siab ntawm kev sib txuas tsim.
Cov hluav taws xob arc txawv ntawm cov khoom siv tam sim no - hloov pauv lossis tas li - thiab nyob rau lub sijhawm kub hnyiab - mem tes lossis nyob ruaj ruaj. Tsis tas li ntawd, lub arc tuaj yeem muaj ncaj qha lossis rov qab polarity.
Raws li hom electrode siv, muaj cov khoom siv tsis siv tau thiab siv tau. Kev siv ib lossis lwm lub electrode ncaj qha nyob ntawm tus yam ntxwv uas lub tshuab vuam muaj. Lub arc uas tshwm sim thaum siv cov khoom siv hluav taws xob tsis siv, raws li lub npe cuam tshuam, tsis deform nws. Thaum vuam nrog cov khoom siv hluav taws xob, lub arc tam sim no melts cov khoom thiab nws tso rau ntawm qhov qub workpiece.
Qhov sib txawv arc tuaj yeem muab faib ua peb ntu: cathode, anode, thiab arc ncej. Hauv qhov no, ntu kawg, i.e. lub arc qia muaj qhov ntev tshaj plaws, txawm li cas los xij, cov yam ntxwv ntawm lub arc, nrog rau qhov muaj peev xwm ntawm nws qhov tshwm sim, raug txiav txim siab los ntawm cov cheeb tsam ze-electrode.
Feem ntau, cov yam ntxwv uas muaj hluav taws xob arc tuaj yeem ua ke rau hauv cov npe hauv qab no:
1. Arc ntev. Qhov no yog hais txog tag nrho qhov kev ncua deb ntawm lub cathode thiab anode cheeb tsam, nrog rau lub arc ncej.
2. Arc voltage. Nws muaj cov txiaj ntsig ntawm qhov poob qis hauv txhua qhov chaw: pob tw, ze-cathode thiab ze-anode. Nyob rau hauv cov ntaub ntawv no, qhov kev hloov ntawm voltage nyob rau hauv lub ze-electrode cheeb tsam yog loj npaum li cas nyob rau hauv cov seemthaj chaw.
3. Kub. Ib qho hluav taws xob arc, nyob ntawm seb muaj pes tsawg leeg ntawm qhov nruab nrab gaseous, cov khoom ntawm cov electrodes thiab qhov ceev tam sim no, tuaj yeem tsim qhov kub txog li 12 txhiab degrees Kelvin. Txawm li cas los xij, cov ncov zoo li no tsis nyob ntawm tag nrho lub dav hlau ntawm lub ntsej muag electrode. Txij li txawm tias nrog kev ua haujlwm zoo tshaj plaws, muaj ntau yam tsis xwm yeem thiab pob ntawm cov khoom ntawm cov khoom siv hluav taws xob, vim tias muaj ntau qhov paug tawm, uas pom tau tias yog ib qho. Ntawm chav kawm, qhov kub ntawm lub arc feem ntau nyob ntawm qhov chaw uas nws hlawv, nrog rau cov tsis muaj qhov muab tam sim no. Piv txwv li, yog tias koj nce tus nqi tam sim no, ces tus nqi kub yuav nce raws li.
Thiab, thaum kawg, tus yam ntxwv tam sim no-voltage lossis VAC. Nws sawv cev rau qhov kev vam khom ntawm qhov voltage ntawm qhov ntev thiab qhov loj ntawm qhov tam sim no.
