Qhov 7018 electrode yog ib qho staple nyob rau hauv cov qauv vuam, muaj nuj nqis rau nws cov khoom siv tsawg {} {}}}}}}}} Tsis muaj nyob hauv tuab hlau daim ntawv thov. Yuav kom ua tiav cov txiaj ntsig zoo, nkag siab qhov tseeb "hlawv" tsis (tam sim no, hluav taws xob, thiab kev ua haujlwm) yog qhov tseem ceeb. Cov teeb tsa no ncaj qha cuam tshuam arc stability, nkag mus, hlaws cov tsos, thiab tag nrho weld zoo. Cov xov xwm no tso tawm cov ntsiab lus tseem ceeb rau kev siv 7018 electrodes thiab muab cov lus qhia rau kev hloov kho lawv raws li vuam scararios.
Hom Hom Tam Sim No: Ncaj Nraim Hluav Taws Xob Cov Hluav Taws Xob Tam Sim No (DCEP) yog qhov zoo
7018 electrode yog tsim los ua qhov zoo tshaj plaws nrog ncaj qha rau electrode zoo (dcher) -}}} Tseem paub rov qab polarity. Hauv DCEP, lub davhlau ya nyob twg (lub davhlau ya nyob twg) nyiam hluav taws xob, tsom mus rau lub zog arc rau ntawm workpiece. Qhov no tsim kom tob tob, uas yog qhov tseem ceeb rau cov hlau tuab, thiab ua kom zoo fertion ntawm weld hlau thiab cov khoom siv hauv paus.
Txawm tias qee cov tuam ntxhab muaj tshwj xeeb 7018 cov neeg sib txawv rau kev hloov pauv tam sim no (AC), txheem 7018 elecodes tawm tsam nrog AC vim tsis sib xws. AC tuaj yeem ua rau kev sib tw, tsis sib luag, thiab nce kev pheej hmoo ntawm porosity, tshwj xeeb tshaj yog nyob rau hauv qis {3} ignage li. Rau feem ntau cov ntawv thov, DCEp tseem yog tus qauv kub, muab lub arc du, khov kho hlau hloov, thiab txhim khu kev qha fusion.
Cov kev tam sim no: piv txog kev ua raws li electrode loj
Qhov "hlawv" tam sim no rau 7018 electrodes yog txiav txim siab los ntawm lawv txoj kab uas hla. Siv kev ua kom qis dhau tsawg dhau rau Arc tsis muaj zog, nkag mus rau tsis zoo, thiab swb swb thiab swb rau. Kev ua kom dhau ib qho kev ua kom zoo tshaj plaws ua rau ntau dhau lawm, hlawv {}}} hydrogen txheej thiab ua kom muaj hydrogen txheej thiab ua kom muaj hydrogen tso rau hauv weld. Hauv qab no yog cov qauv kev pab cuam uas ib txwm muaj 7018 electrode qhov ntau thiab tsawg:
1/8 nti (3.2 hli): 90-160 amps
Qhov loj me no yog ntau yam rau nruab nrab - tuab hlau (1/4 mus rau 3/4 nti). Qhov qis kawg (90-120 amps) ua haujlwm rau cov chaw ntsug lossis siv nyiaj ntau dua, qhov twg qis dua hluav taws kub txo qis kev pheej hmoo ntawm kev pheej hmoo ntawm kev pheej hmoo ntawm sagging. Qhov siab tshaj plaws (130-160 amps) yog qhov zoo tagnrho rau tiaj tiaj lossis kab rov tav vuam, ua kom zoo tshaj plaws rau kev tso quav thiab nkag mus.
5/32 nti (4.0 hli): 140-220 amps
Siv rau cov hlau thicker (3/4 mus rau 1.5 nti), qhov loj me no yuav tsum muaj cua sov ntxiv rau qhov chaw fenteration, thaum xyoo 190-220
3/16 Nti (4.8 hli): 180-280 amps
Tsim los rau cov txheej txheem hnyav ua haujlwm ntawm steel dua 1 nti tuab {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} {
1/4 nti (6.4 hli): 250-350 amps
Tshwj tseg rau cov hlau tuab heev (dhau 2 nti) lossis siab - deposition cov ntawv thov uas siab ntshauv ntaub. Qhov loj me no yuav tsum muaj tshav kub kom sov kom yaj los ntawm cov ntu tuab, nrog 250-300 amps rau ntsug vuam thiab 310-350 amps rau txoj haujlwm tiaj.
Cov kev sib tw no yog cov txheej txheem dav dav {{0} Cov chaw tsim khoom yuav hais kom cov ntawv hloov me me, yog li xyuas cov ntaub ntawv electrode. Piv txwv li, qee qhov qis - hydrogen 7018 pas dej nrog cov hlau ntxiv yuav zam dua amperages rau kev tso tawm kom sai.
Voltage: parameter theem nrab rau arc stability
Thaum tam sim no (qhov zoo) yog qhov chaw teeb tsa, Voltage ua lub luag haujlwm txhawb nqa lub luag haujlwm Arc ruaj khov. Rau 7018 electrodes, qhov zoo tshaj plaws voltage ntau yog 22-30 volts, nyob ntawm seb thiab electrode loj. Txo cov amperagages (piv txwv li, 90-160 amps rau 1/8-nti, thaum siab dua amperages (piv txwv li amps rau 1/5, 250-nti.
Kev cuam tshuam rau Arc ntev: thiab arc ua luv luv thiab ua tsis ncaj ncees, ua rau "steving greying duab. Ntau dhau, thiab arc lengthens, ua kom muaj kev sib tw, porosity, thiab nkag mus tob. Feem ntau niaj hnub vuam tshuab yuav kho cov hluav taws xob kom phim rau arc, xiav} Lub tshuab dawb huv tam sim no qhia txog qhov ntsuas hluav taws xob tsawg heev.
Kho kom haum rau txoj haujlwm vuam thiab cov ntaub tuab
7018 elecatility rau txhua txoj haujlwm (tiaj tus, ntsug, overhead) yuav tsum tau hloov dua siab) yuav tsum tau hloov dua siab rau kev nqus rau lub ntiajteb txawj nqus thiab hluav taws xob kub:
Tiaj tus thiab cov kab rov tav: rov qab amperages (mus rau sab saum toj ntawm cov kev pom zoo tau ntau) yog tau txais ntawm no, tsis zoo li ntawm cov hlau hauv qhov chaw. Qhov no nce nqi tso nyiaj ntxiv thiab ua kom sib sib zog nqus sib sib zog nqus, tseem ceeb rau cov hlau tuab. Piv txwv li, ib tus pas nrig 5/32-nti hauv tiaj vuam ntawm 1-nti hlau tuaj yeem siv 190-220 amps.
Ntsug thiab cov nyiaj ua haujlwm ntau tshaj plaws: tsawg dua amperages (mus rau hauv qab ntawm cov khoom) tiv thaiv cov hlau los ntawm sagging lossis dripping. Ib 5/32-nti pas nrig nyob rau hauv ntsug vuam yuav siv 140-170 amps, maj mam tso nyiaj thiab cia lub pas dej weld kom ua tau sai dua. Kev mus ncig ua si yuav tsum nce ntxiv me ntsis kom tsis txhob tsim kev ua dhau.
Cov ntaub ntawv tuab tuab: ntawm cov hlau tuab: ntawm cov hlau thinner (1/4 rau 1/2 nti), nyob twj ywm mus rau qis kawg ntawm cov kev kub siab kom tsis txhob hlawv - los ntawm. On tuab hlau (ntau dua 1 nti), siv ntau dua amperages kom paub meej txog kev sib koom ua ke, tshwj xeeb tshaj yog nyob rau hauv lub hauv paus yog qhov tseem ceeb.
Cov lus qhia tseem ceeb rau kom tsim nyog "Hlawv"
Tshaj li ntawm cov tsis muaj, tsim nyog tuav ntawm 7018 electrodes ua kom lawv kub hnyiab raws li kev npaj:
Kev tswj hwm yaiab: 7018's qes - hydrogen txheej yog cov noo noo- rhiab. Raug rau cov av noo, nws nqus dej, uas tso tawm hydrogen thaum vuam thiab ua rau tawg. Khaws cia cov pas nrig uas tsis muaj kev cia hauv cov thawv ntim khoom, thiab ib zaug qhib, rov qab ua rau lawv muaj ntau dua 4 teev, rov qab siv rau 1-2 teev ua ntej siv.
Kev ntxuav cov hlau: Roj, xeb, lossis pleev xim rau ntawm cov neeg ua haujlwm tsis huv weld thiab cuam tshuam rau arc. Ntxuav thaj chaw nrog lub xaim txhuam lossis grinder ua ntej vuam los xyuas kom meej 70-1 elrounded fleinly.
ARC Leng Leng Leng Leng Leng Leng Length: Tswj qhov luv luv Arc (1/8 rau 3/16 nti) kom txo tau cover sib tw thiab tiv thaiv lub pas weld pas nrog hluav taws xob. Ib lub arc ntev tso cai rau cov pa roj atmospheric (oxygen, nitrogen) nkag mus rau hauv pas dej, ua rau muaj tus porosity.
Qhov tshwm sim ntawm cov tsis raug
Siv cov chaw tsis yog rau 7018 cov hluav taws xob tuaj yeem ua rau muaj nqi tsis xws luag:
Tsawg amperage: qaug zog arc, nkag mus rau tsis zoo, thiab swb swb thiab swb. Welds tej zaum yuav ua tsis tiav vim tsis muaj fusion.
Kev kub siab: ntau dhau lawm, hlawv -}} ntawm (hauv nyias steel), thiab overheating. Qhov no tuaj yeem txwv qhov qis - hydrogen txheej, tso cov kab mob hydrogen thiab nce zuj zus kev pheej hmoo. Weld hlaws kuj tseem yuav dhau los ua convex thiab tej xwm txheej, uas yuav tsum tau tshaj tawm {{}} weld sib tsoo.
Tsis yog polarity (AC lossis DCEN): AC ua rau muaj arcs tsis ruaj khov thiab txhais tau; DCEN (ncaj qha rau electrode tsis zoo) tsom kwm kub hnyiab ntawm lub electrode, txo kev nkag mus rau overheat sai heev.
Tag
Hlawv li 7018 electrode hinges ntawm peb cov tseem ceeb: Siv DCeptage zoo rau lub electrode loj thiab txoj hauj lwm, thiab tswj cov voltage. Rau feem ntau cov ntawv thov:
1/8-nti qws: 90-160 amps (DCEp), 22-25 volts
5/333 nti pas nrig: 140-220 amps (DCEp), 23-27 volts
3/3-nti Qws: 180-280 Amps (DCEp), 24-28 volts
1/4-nti Qws: 250-350 amps (DCTS), 26-30 volts
Kho cov hauv qab rau ntsug / nyiaj siv ua haujlwm thiab thinner steel, thiab upward rau tiaj tus qauv thiab tuab hlau. Khub cov chaw no nrog noo noo - tswj kev cia, huv si arc kom ua tiav muaj zog, puas yog {}}} welds dawb welds.
Los ntawm mastering cov tsis sib haum no, Welders tuaj yeem qhib cov peev txheej 708}}}}}} {} {} lub zog welds
