Txoj Cai:
Cov khoom siv hluav taws xob vuam yog siv lub zog hluav taws xob, los ntawm cov cua sov thiab kev kub siab, uas yog, qhov kub thiab txias arc tsim los ntawm qhov zoo thiab tsis zoo electrodes nyob rau hauv lub luv luv Circuit Court, yaj lub solder thiab welded khoom ntawm lub electrode, nrog kev pab los ntawm kev sib xyaw thiab diffusion ntawm hlau atoms, thiaj li hais tias ob los yog ntau tshaj welds tau ruaj khov ua ke. Nws yog tshwj xeeb yog tsim los ntawm cov electrode, lub tshuab hluav taws xob vuam, hluav taws xob vuam vuam, lub hauv paus clamp thiab cov hlau txuas. Raws li hom tso zis hluav taws xob, nws tuaj yeem muab faib ua ob hom, ib qho yog AC vuam tshuab thiab lwm yam yog DC vuam tshuab.
Vuam tshuabkev sib txuas:
• Cov hlua vuam txuas nrog cov hlua vuam txuas txuas qhov ntawm lub tshuab vuam los ntawm cov xov hlau txuas;
• Lub grounding clamp txuas nrog lub grounding clamp txuas lub qhov ntawm lub tshuab vuam los ntawm cov hlau txuas;
• Muab cov welment tso rau ntawm qhov flux ncoo thiab tuav lub hauv av clamp mus rau ib qho kawg ntawm qhov vuam;
• Tom qab ntawd clamp qhov koob hmoov kawg ntawm cov electrode mus rau lub puab tsaig vuam;
• Kev tiv thaiv hauv av lossis xoom kev sib txuas ntawm lub plhaub ntawm lub tshuab vuam (cov khoom siv hauv av tuaj yeem siv cov yeeb nkab tooj liab lossis seamless steel yeeb nkab, qhov tob ntawm nws cov faus rau hauv av yuav tsum yog> 1m, thiab qhov kev tiv thaiv hauv av yuav tsum yog <4Ω), uas yog, siv cov xaim txuas mus rau ib qho kawg ntawm cov khoom siv hauv av thiab lwm qhov kawg ntawm qhov av kawg ntawm lub plhaub ntawm lub plhaub.vuam tshuab.
• Tom qab ntawd txuas lub tshuab vuam nrog lub thawv xa khoom los ntawm cov kab sib txuas, thiab xyuas kom meej tias qhov ntev ntawm txoj kab txuas yog 2 mus rau 3 meters, thiab lub thawv xa khoom yuav tsum tau nruab nrog cov khoom siv tiv thaiv overload thiab riam hloov hloov, thiab lwm yam, uas tuaj yeem tswj lub zog ntawm lub vuam tshuab cais.
• Ua ntej vuam, tus neeg tsav tsheb yuav tsum hnav cov khaub ncaws vuam, cov khau khiab roj hmab, cov hnab looj tes tiv thaiv, lub ntsej muag tiv thaiv thiab lwm yam cuab yeej tiv thaiv kev nyab xeeb, txhawm rau ua kom muaj kev nyab xeeb ntawm tus neeg teb xov tooj.
Kev sib txuas ntawm lub zog nkag thiab tawm ntawm lub tshuab vuam:
Feem ntau muaj 3 txoj kev daws teeb meem rau cov kab hluav taws xob nkag: 1) cov xaim nyob, cov xaim nruab nrab, thiab cov xaim hauv av; 2) Ob txoj hlua nyob thiab ib lub hauv av xaim; 3) 3 kab nyob, ib kab hauv av.
Cov kab tso zis ntawm lub tshuab hluav taws xob vuam tsis txawv tshwj tsis yog rau AC vuam tshuab, tab sis DC vuam tshuab muab faib ua qhov zoo thiab qhov tsis zoo:
DC vuam tshuab zoo polarity kev twb kev txuas: polarity kev twb kev txuas txoj kev ntawm DC vuam tshuab yog raws li nyob rau hauv lub workpiece raws li ib tug siv, uas yog, lub vuam workpiece yog txuas nrog lub zoo electrode tso zis ntawm lub welding tshuab, thiab vuam kov (clamp) yog txuas nrog rau qhov tsis zoo electrode. Qhov zoo polarity kev twb kev txuas arc muaj cov yam ntxwv nyuaj, lub arc yog nqaim thiab ntxhab, lub tshav kub yog concentrated, kev nkag mus yog muaj zog, qhov sib sib zog nqus nkag tau nrog ib tug me me tam sim no, lub weld hlaws (weld) tsim yog nqaim, thiab welding txoj kev kuj yog ib qho yooj yim rau tus tswv, thiab nws kuj yog cov feem ntau lug siv kev twb kev txuas.
DC vuam tshuab tsis zoo polarity kev twb kev txuas txoj kev (tseem hu ua rov qab polarity kev twb kev txuas): lub workpiece yog txuas nrog rau qhov tsis zoo electrode, thiab vuam kov yog txuas nrog rau qhov zoo electrode. Qhov tsis zoo polarity arc yog mos, divergent, ntiav nkag, kuj loj tam sim no, loj spatter, thiab yog haum rau cov chaw uas muaj tshwj xeeb vuam txheej txheem yuav tsum, xws li lub nraub qaum nto ntawm lub nraub qaum, surfacing vuam, qhov vuam hlaws yuav tsum dav thiab tiaj tus, vuam nyias daim hlau thiab cov hlau tshwj xeeb, thiab lwm yam. Tsis tshua muaj polarity welding yog tsis yooj yim. Tsis tas li ntawd, thaum siv alkaline low-hydrogen electrodes, qhov kev sib txuas rov qab yog qhov ruaj khov dua li qhov zoo arc, thiab tus nqi ntawm spatter yog me me.
Raws li seb yuav siv qhov zoo polarity kev twb kev txuas los yog tsis zoo polarity kev twb kev txuas txoj kev thaum lub sij hawm vuam, nws yuav tsum tau txiav txim siab raws li cov txheej txheem vuam,vuam mobcov khoom thiab cov khoom siv electrode.
Yuav txiav txim qhov polarity ntawm cov zis ntawm DC welding tshuab: Lub tshuab vuam tsis tu ncua yog cim nrog + thiab - ntawm qhov tso zis davhlau ya nyob twg lossis lub davhlau ya nyob twg, + txhais tau tias tus ncej zoo thiab - qhia tus ncej tsis zoo. Yog tias qhov zoo thiab qhov tsis zoo electrodes tsis tau sau npe, cov txheej txheem hauv qab no tuaj yeem siv los paub qhov txawv ntawm lawv.
1) Cov txheej txheem empirical. Thaum siv cov khoom siv hluav taws xob tsawg (lossis alkaline) electrodes rau vuam, yog tias qhov arc combustion tsis ruaj khov, qhov tawg yog qhov loj, thiab lub suab nrov heev, nws txhais tau hais tias txoj kev txuas rau pem hauv ntej yog siv; Txwv tsis pub, nws yog thim rov qab.
2) Charcoal rod method. Thaum cov pa roj carbon rod txoj kev siv los txiav txim siab txoj kev txuas rau pem hauv ntej lossis txoj kev rov qab sib txuas, nws tuaj yeem raug txiav txim los ntawm kev soj ntsuam cov arc thiab lwm yam kev mob:
ib. Yog hais tias lub arc combustion yog ruaj khov thiab cov pa roj carbon monoxide burns maj mam, nws yog ib tug zoo kev twb kev txuas txoj kev.
b. Yog hais tias lub arc combustion tsis ruaj tsis khov thiab cov pa roj carbon rods raug hlawv hnyav, nws yog txoj kev rov qab sib txuas.
3) Multimeter txoj kev. Cov txheej txheem thiab cov kauj ruam ntawm kev siv multimeter los txiav txim rau txoj kev sib txuas rau pem hauv ntej lossis rov qab txoj kev sib txuas yog:
ib. Muab lub multimeter tso rau hauv qhov siab tshaj plaws ntawm DC voltage (sab saum toj 100V), lossis siv DC voltmeter.
b. Lub multimeter cwj mem thiab DC vuam tshuab yog feem ntau kov, yog tias nws pom tias tus taw tes ntawm lub multimeter yog deflected clockwise, ces lub davhlau ya nyob twg ntawm lub vuam tshuab txuas nrog tus cwj mem liab yog tus ncej zoo, thiab lwm qhov kawg yog tus ncej tsis zoo. Yog tias koj sim nrog digital multimeter, thaum lub cim tsis zoo tshwm sim, nws txhais tau hais tias tus cwj mem liab txuas nrog tus ncej tsis zoo, thiab tsis muaj lub cim tshwm, uas txhais tau hais tias tus cwj mem liab txuas nrog tus ncej zoo.
Tau kawg, rau lub tshuab vuam siv, koj tseem yuav tsum tau kuaj xyuas cov ntawv qhia sib raug.
Qhov ntawd yog txhua yam rau cov hauv paus ntsiab lus niaj hnub no hauv kab lus no. Yog tias muaj qhov tsis tsim nyog, thov nkag siab thiab kho
Post lub sij hawm: Mar-22-2025
