Cov siab -frequency arcyog ib tug tsis tshua muaj tam sim no arc. Kuv tau pom welders teeb lub siab - zaus tsuas yog ntawm lawv cov ntiv tes tsis muaj kev puas tsuaj. Raws li lwm tus tau hais, qhov siab - zaus pib yog qhov tseem ceeb heev los tsim qhov pib muag muag nrog kev tswj siab tshaj plaws ntawm arc thiab tsis tas yuav tsum kov cov khoom siv nrog cov tungsten. Qhov thib ob siv yog nrog AC tam sim no. Koj yuav tsum muaj qhov siab - zaus ntawm kev txuas mus ntxiv kom thiaj li muaj peev xwm txuas tau siv AC tam sim no.
Yog vim li cas qhov siab - zaus ua haujlwm rau 2 qhov kev siv no yog tib yam. Lub ntsiab arc yog qhov qis -voltage / high tam sim no arc, thaum lub siab - zaus arc yog siab -voltage / low tam sim no arc. Cov hluav taws xob tsis kam ntawm cov roj thaiv npog tsis tshua muaj siab txaus tias qhov tsis tshua muaj hluav taws xob tsawg ntawm lub zog arc tseem ceeb tsis tuaj yeem dhia qhov sib txawv ntawm tungsten mus rau ib feem thiab tsim lub ntsiab arc.
Lub siab -voltage / low tam sim no siab - zaus fais fab mov yog qhov ntxeev. Qhov siab -voltage nws tuaj yeem dhia qhov sib txawv. Thaum nws ua li ntawd, qhov siab - zaus kuj ionizes cov pa roj carbon monoxide, ua rau nws tig mus rau hauv cov ntshav. Lub plasma muaj qhov hluav taws xob tsis tshua muaj hluav taws xob, uas lub zog hluav taws xob tseem ceeb tuaj yeem dhia. Thaum lub ntsiab arc pib, nws tswj nws tus kheej plasma kom nyob twj ywm. qhov no txhais tau hais tias lub nkoj tuaj yeem teeb ntawm qhov uas yuav yog qhov tsis tshua muaj tam sim no.
Nrog AC tam sim no, nws zoo ib yam, tsuas yog sib txawv. Raws li AC voltage cycles ntawm 0 mus rau qhov siab tshaj plaws rov qab mus rau 0 mus rau qhov tsis zoo siab tshaj plaws thiab tom qab ntawd rov qab mus rau 0 thiab dhau mus nws txuas ntxiv mus rau 0 point. Thaum muaj 0 voltage, kuj tseem muaj 0 tam sim no, uas txhais tau hais tias lub arc kaw. Nrog rau qhov siab - zaus arc nyob tas li, qhov siab - zaus arc yog muab cov hluav taws xob tsis tshua muaj zog plasma rau lub ntsiab tam sim no kom dhau los ntawm qhov hluav taws xob nce ntawm 0, yog li rov tsim kho lub ntsiab arc 120 zaug ib ob ntawm 60 Hz.
