Kodi kugwirizana panopa mwachindunji, chimene mwachindunji panopa n'zosiyana kugwirizana, ndi mmene kusankha pamene kuwotcherera

1. Kulumikiza kwa DC kutsogolo (njira yolumikizira kutsogolo):

Njira yolumikizira kutsogolo imatanthawuza njira yolumikizira waya yomwe imagwiritsidwa ntchito kuyeza kutayika kwa dielectric mu mayeso a Xilin Bridge circuit. Dielectric loss factor kuyezedwa ndi njira yolumikizira kutsogolo ndi yaying'ono, ndipo chotayika cha dielectric choyesedwa ndi njira yolumikizira kumbuyo ndi yayikulu. Poyerekeza ndi njira yolumikizira kumbuyo, njira yolumikizira kutsogolo imatha kuchepetsa kukana kwa antihalo wosanjikiza pamwamba pa mtengo woyeserera wa dielectric loss factor.

2. Kulumikizika kwa DC m'mbuyo (mwachitsanzo njira yolumikizira m'mbuyo):

Amatanthauza njira yolumikizira dera panthawi yowotcherera. Mu kuwotcherera kwa tungsten arc, DC reverse connection imakhala ndi zotsatira zochotsa filimu ya okusayidi, yotchedwa "cathode fragmentation" kapena "cathode atomization".

Zotsatira za kuchotsa mafilimu okusayidi ziliponso mu reverse polarity theka la mafunde a AC kuwotcherera. Ndi chinthu chofunikira pakuwotcherera bwino aluminium, magnesium ndi ma aloyi awo.

3. Pamene kuwotcherera, muyenera kusankha makamaka DC kutsogolo kugwirizana kapena DC n'zosiyana kugwirizana malinga ndi zosowa za zipangizo kuwotcherera.

Zochita zatsimikizira kuti pamene DC imalumikizidwa mosinthika, filimu ya oxide yomwe ili pamwamba pa workpiece imatha kuchotsedwa pansi pa arc kuti ipeze weld yowala, yokongola komanso yopangidwa bwino. Ngati chingwe cha waya chingathe kulekanitsidwa ndi nthaka, kuyesa kwapamalo kuyenera kugwiritsa ntchito njira yolumikizira yabwino momwe mungathere.

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Mfundo yolumikizana ndi DC reverse:
Pamene DC imasinthidwa, filimu ya oxide yomwe ili pamwamba pa workpiece imatha kuchotsedwa pansi pa arc kuti ipeze weld yowala, yokongola komanso yopangidwa bwino.

Izi ndichifukwa choti ma oxide achitsulo amakhala ndi ntchito zazing'ono ndipo amatulutsa ma elekitironi mosavuta, kotero mawanga a cathode ndi osavuta kupanga pafilimu ya oxide ndikupanga ma arcs. Mawanga a cathode ali ndi katundu wofufuza okha zitsulo zachitsulo.

Kuchulukana kwamphamvu kwa malo a cathode ndikokwera kwambiri, ndipo kumakhudzidwa ndi ayoni abwino okhala ndi misa yayikulu, yomwe imaswa filimu ya oxide.

Komabe, kutentha kwa DC reverse kugwirizana kumawononga kuwotcherera, chifukwa anode ya tungsten argon arc kuwotcherera kumatentha kwambiri kuposa cathode. Polarity ikasinthidwa, ma elekitironi amawombera ma elekitirodi a tungsten ndikutulutsa kutentha kwakukulu, komwe kumatha kutenthetsa mosavuta ndikusungunula ma elekitirodi a tungsten. Pa nthawiyi, ngati kuwotcherera kwa 125A kudzadutsa, ndodo ya tungsten yokhala ndi mainchesi pafupifupi 6mm imafunika kuti ma elekitirodi a tungsten asasungunuke.

Nthawi yomweyo, chifukwa palibe mphamvu zambiri zomwe zimatulutsidwa pakuwotcherera, kuya kwa kulowetsedwa kwa weld kumakhala kozama komanso kokulirapo, zokolola zimakhala zochepa, ndipo mbale za aluminiyamu za 3mm zokha zimatha kuwotcherera. Chifukwa chake, kulumikizana kwa DC reverse sikugwiritsidwa ntchito kaŵirikaŵiri pakuwotcherera kwa tungsten arc kupatulapo kuwotcherera aluminium ndi mbale zoonda za magnesium.