1. Dab tsi yog txoj kev vuam ntau tshaj plaws rau galvanized coils?
A. Cov txheej txheem vuam ntau tshaj plaws rau galvanized coils yog cov roj hlau arc vuam (MIG/MAG vuam), tshwj xeeb tshaj yog thaum siv cov khoom siv los yog cov khoom siv flux-cored vuam hlau uas muaj cov khoom deoxidizing. Txoj kev vuam no yog qhov ua tau zoo thiab hloov tau. Nrog rau qhov tsim nyog welding tsis thiab kev tiv thaiv roj (xws li argon lossis argon-} nplua nuj sib xyaw), nws tuaj yeem txo qhov cuam tshuam ntawm zinc vapor ntawm lub pas dej molten, uas ua rau lub vuam zoo ruaj khov.
2. Vim li cas feem ntau nws yog qhov yuav tsum tau tshem tawm cov zinc txheej hauv qhov chaw vuam ua ntej vuam galvanized coils?
A: Lub melting point ntawm zinc (kwv yees li 419 degree) yog qis dua cov hlau (kwv yees li 1500 degree). Thaum lub sij hawm vuam, zinc txheej melts ua ntej thiab ces sai vaporizes, ua ib tug loj npaum li cas ntawm zinc vapor. Zinc vapor tsis tsuas yog yooj yim ua rau porosity, spatter, thiab tsis muaj fusion defects, tab sis kuj oxidizes tsim zinc oxide, paug cov vuam thiab txo kev sib koom ua ke. Yog li ntawd, ntau txoj kev vuam (xws li phau ntawv arc vuam thiab tsis yog -miv MIG vuam) siv kev sib tsoo los yog cov khoom siv txhuam kom tshem tawm cov zinc txheej ntawm bevel thiab cheeb tsam ib puag ncig (kwv yees li 20-30mm) ua ntej vuam kom ntseeg tau qhov zoo ntawm vuam.
3. Dhau li ntawm MIG / MAG vuam, dab tsi lwm txoj kev vuam yog tsim rau galvanized coils?
A: Feem ntau siv txoj kev muaj xws li qhov chaw vuam thiab seam vuam, haum rau nyias phaj ncej puab. Cov txheej txheem no ceev ceev thiab tsis tas yuav tshem cov zinc txheej (tab sis yuav tsum tau nce electrode siab thiab luv luv vuam lub sij hawm kom tshem tawm zinc vapor). Thib ob, brazing (xws li nplaim taws brazing lossis induction brazing) siv cov khoom siv hlau nrog cov ntsiab lus melting qis dua zinc kom ua tiav qhov kev sib txuas, tsis txhob muaj kev puas tsuaj rau zinc txheej. Tsis tas li ntawd, laser welding, ntawm lub zog siab ceev, tuaj yeem ua rau cov txheej txheem zinc tam sim ntawd thiab tsim cov nyhuv keyhole, kuj tsim nyog rau galvanized coils, tab sis nws yuav tsum tau nruj tswj xyuas cov workpiece sib dhos clearance.
4. Yuav ua li cas tiv thaiv porosity thiab tawg thaum vuam galvanized coils?
A: Tus yuam sij rau kev tiv thaiv porosity yog tswj txoj kev khiav ntawm zinc vapor: Rau cov roj shielded welding, siv ib hom mem tes, nce lub shielding gas flow rate (piv txwv li, 95% argon + 5% carbon dioxide), thiab tswj kom tsim nyog cov cua sov ntxiv; rau cov vuam tsis kam, tsim venting grooves ntawm electrodes los yog siv electrodes nrog ib tug serrated nto. Kev ntsuas los tiv thaiv cov kab nrib pleb (tshwj xeeb tshaj yog liquefaction tawg) muaj xws li: siv vuam hlau uas muaj deoxidizing cov ntsiab lus xws li titanium thiab txhuas (xws li, ER70S-6), tsim nyog ua kom cov vuam ceev kom txo tau cov cua sov, thiab preheating rau 150-200℃kom txo tau hardening nyiam. Yog tias cov zinc txheej tau raug tshem tawm, qhov kev pheej hmoo ntawm kev tawg yog txo qis.
5. Dab tsi yuav tsum tau ceev faj thaum laser vuam galvanized coils?
A: Qhov tseem ceeb tshaj plaws uas yuav tsum tau them sai sai rau thaum laser vuam galvanized coils yog tswj cov pa ntawm zinc vapor. Vim hais tias lub zog laser yog shielded saum lub qhov me me uas tsim los ntawm kev sib sib zog nqus nqus laser vuam, ntau zinc vapor uas tsis tuaj yeem khiav hauv lub sijhawm tuaj yeem ua rau vuam porosity lossis spatter. Cov kev daws teeb meem suav nrog: txhob txwm tawm ntawm 0.1-0.3mm sib dhos qhov sib txawv hauv lub puab tsaig sib koom kom tso cai rau zinc vapor khiav; los yog siv dual-beam laser vuam (ib lub beam rau preheating thiab evaporating zinc txheej, thiab lwm yam rau vuam). Tsis tas li ntawd, ib qho kev tiv thaiv roj loj loj yuav tsum tau siv los ntxuav cov zinc vapor tom qab, thiab txoj haujlwm tseem ceeb yuav tsum tau tswj nruj me ntsis txhawm rau tiv thaiv zinc txheej ablation thiab paug ntawm cov lo ntsiab muag kho qhov muag.