1. Dab tsi yog "weld spots" ntawm galvanized coils? Vim li cas lawv feem ntau xav tau kev sib tsoo kom tshem tawm lawv?
A: Tom qab welding galvanized coils, pom tsis pom kev, blackening, los yog roughness tshwm nyob rau hauv weld cheeb tsam, feem ntau hu ua "weld me ntsis." Muaj ob lub laj thawj tseem ceeb rau qhov no: Ua ntej, qhov kub thiab txias tsim thaum lub sij hawm vuam (nce mus txog ntau txhiab degrees Celsius) ua rau cov zinc txheej, nrog rau lub melting point ntawm tsuas yog 420 degree, kom sai yaj, boil, los yog txawm vaporize, tag nrho cov zinc txheej nyob ze ntawm lub weld. Thib ob, ntawm qhov kub thiab txias, zinc reacts nrog huab cua los ua dawb tab sis complex zinc oxide (ZnO), uas sib tov nrog cov hlau weld, ua rau qhov tsaus ntuj no - xim, tawv oxide txheej.
Yog vim li cas kev sib tsoo yog thawj txoj hauv kev ntawm kev tshem tawm yog tias weld me ntsis sawv cev rau kev hloov pauv ntawm lub cev thiab tshuaj lom neeg lub xeev ntawm lub substrate nto tom qab zinc txheej tau raug hlawv, thiab nyuaj rau rov qab siv cov tshuaj ntxuav tes lossis tshuaj siv tshuaj ib leeg. Lub hom phiaj ntawm polishing yog "kev tshem tawm lub cev": nws tuaj yeem tshem tawm qhov tsis sib xws ntawm vuam slag, spatter, thiab nkig thiab corrosion -deficient oxide txheej, tsim kom huv si thiab tiaj tus hlau substrate rau tom ntej re- tsim los tiv thaiv - xeb txheej.
2. Dab tsi yog cov txheej txheem tiav rau kev sib tsoo thiab kho qhov chaw vuam? Cov cuab yeej twg xav tau?
A: Kev sib tsoo thiab kho qhov chaw vuam ntawm cov galvanized coils tsis yog ib qho yooj yim ntawm "polishing," tab sis cov txheej txheem ntau- kauj ruam los xyuas kom meej qhov kev kho zaum kawg. Cov txheej txheem txheej txheem feem ntau suav nrog cov kauj ruam tseem ceeb hauv qab no:
Kev Tu Nto: Qhov no yog kev npaj ua ntej sib tsoo. Cov khoom loj ntawm weld slag thiab spatter nyob rau hauv qhov chaw weld yuav tsum tau muab tshem tawm siv ib tug hlau txhuam los yog sandblasting, saib xyuas los tiv thaiv ib puag ncig zoo zinc txheej thiab tsis txhob muaj kev puas tsuaj.
Mechanical Sib Tsoo: Qhov no yog cov kauj ruam tseem ceeb. Lub kaum sab xis grinder lossis lub tshuab abrasive, nruab nrog lub log sib tsoo uas tsim nyog lossis lub log nrov plig plawg, yuav tsum tau ua kom sib npaug ntawm qhov chaw sib tsoo kom txog thaum lub teeb ci, huv si hlau raug nthuav tawm.
Fine Finishing: Kom tau txais qhov zoo ntawm qhov chaw zoo, tom qab sib tsoo sib tsoo, hloov mus rau cov ntawv xuab zeb zoo dua (xws li, maj mam nce ntawm 240 grit mus rau 800 grit) rau phau ntawv los yog siv tshuab polishing kom cov av hauv av du thiab txawm.
Cleansing thiab Degreasing: Sib tsoo ua kom muaj plua plav thiab roj paug. Nco ntsoov siv cawv, acetone, lossis ib lub tshuab ntxhua khaub ncaws tshwj xeeb los so kom huv si kom huv si kom paub meej tias qhov chaw tsis muaj roj, plua plav, thiab lwm yam kab mob. Qhov no yog ib qho tseem ceeb heev rau cov adhesion ntawm cov coatings tom ntej.
3. Dab tsi yog qhov tseem ceeb ceev faj thiab cov txheej txheem kev khiav hauj lwm rau kev sib tsoo thiab kho qhov chaw vuam?
A: Kev sib tsoo yuav zoo li yooj yim, tab sis ntau cov ntsiab lus txiav txim siab qhov ua tiav lossis tsis ua tiav ntawm kev kho. Nov yog qee qhov kev ceev faj thiab cov txheej txheem tseem ceeb:
Qeb|Cov txheej txheem ua haujlwm tshwj xeeb
Cov cuab yeej xaiv|Nyob rau hauv qhov kev sib tsoo ntxhib, siv lub kaum sab xis nrog lub log hloov tau yooj yim (fineness pom zoo ntau dua 200 grit) kom ntseeg tau tias kev ua haujlwm zoo thiab tiaj tus; nyob rau hauv qhov zoo sib tsoo theem, hloov mus rau 240-800 grit sandpaper nyob rau hauv ib theem zuj zus kom ua tau ib tug smoother nto.
Kev Tswjhwm|Ua raws li lub hauv paus ntsiab lus ntawm "me me, ntau zaus, txawm tias quab yuam," thiab siv cov txheej txheem "lub teeb sib tsoo". Tsis txhob sib tsoo ntau dhau ntawm ib qho chaw rau lub sijhawm ntev los tiv thaiv kev sib tsoo hauv zos lossis sib tsoo los ntawm cov khoom siv hauv paus.
Thaj Chaw Tswj|Kev tiv thaiv ib puag ncig zoo zinc txheej yog lub hauv paus ntsiab lus. Qhov chaw sib tsoo yuav tsum raug txwv rau thaj chaw weld thiab nws cov cua sov nyob ib puag ncig- thaj tsam cuam tshuam (feem ntau yog 5-10 cm ntawm txhua sab ntawm qhov vuam) kom tsis txhob muaj kev puas tsuaj tsis tsim nyog thiab ua kom cov haujlwm ntawm kev kho tom ntej.
4. Tom qab sib tsoo, qhov chaw vuam puas yuav kho nws tus kheej yam tsis muaj kev kho mob? Puas yog kev tiv thaiv - kev kho corrosion tsim nyog?
A: Tom qab sib tsoo, qhov chaw vuam tsis tuaj yeem kho nws tus kheej yam tsis muaj kev kho mob, thiab kev tiv thaiv kev tiv thaiv - kev kho corrosion yog qhov yuav tsum tau ua.
Yog vim li cas yog tias kev sib tsoo tag tshem tawm cov txheej txheem tiv thaiv galvanized nrog rau cov vuam, tawm hauv cov hlau substrate kom raug. Yog tsis muaj kev tiv thaiv- kev kho corrosion, thaj chaw no yuav raug ncaj qha rau huab cua ntub, tam sim ntawd los ua qhov pib ntawm corrosion, xeb, thiab yog li cuam tshuam lub zog ntawm cov qauv thiab kev pab cuam lub neej ntawm tag nrho cov galvanized coil. Lub hom phiaj tseem ceeb ntawm kev sib tsoo yog los tsim kom muaj kev pom zoo adhesion rau cov tom ntej los tiv thaiv -corrosion txheej.
Yog li ntawd, kev sib tsoo tsuas yog "kev npaj theem" ntawm tag nrho cov txheej txheem kho; cov tom ntej "corrosion restoration" yog lub hauv paus. Cov txheej txheem muaj xws li:
Siv zinc-nplua nuj txheej: Qhov no yog txoj hauv kev tshaj plaws. Nyob rau ntawm polished thiab huv si hlau nto, ib tug siab -zinc- cov ntsiab lus zinc- nplua nuj txheej (feem ntau yuav tsum tau zinc hmoov cov ntsiab lus ntawm ntau tshaj los yog sib npaug rau 80% nyob rau hauv cov zaj duab xis qhuav, thiab ntau tshaj los yog sib npaug li 92% pom zoo rau kub -dip galvanized qhov chaw) tuaj yeem ncaj qha txhuam los yog txau. Cov txheej no tseem tiv thaiv lub substrate los ntawm electrochemical txhais tau tias.
Thermal spray zinc: Qhov no yog qhov kim dua tab sis muaj txiaj ntsig zoo tshaj plaws. Molten zinc hlau yog txau rau ntawm qhov chaw kho mob uas siv cov cuab yeej tshwj xeeb, tsim cov zinc txheej nrog cov khoom zoo ib yam li kub -dip galvanizing.
5. Dhau li ntawm kev sib tsoo tshuab, puas muaj lwm yam thev naus laus zis lossis kev txhim kho cov txheej txheem rau kev tshem tawm cov weld spatter?
A: Dhau li ntawm kev siv tshuab sib tsoo feem ntau, muaj tseeb ntau lwm yam thev naus laus zis muaj, feem ntau yog siv hauv high -kawg manufacturing teb nrog cov kev xav tau siab dua rau kev ua tau zoo thiab kev ua haujlwm zoo.
Ib qho kev xaiv tshaj plaws yog laser tu. Nws siv lub siab - lub zog laser beam los irradiate lub workpiece nto, ua rau weld spatter, oxide nplai, thiab lwm yam kab mob kom sai sai nthuav thiab "tev tawm" los ntawm substrate. Tag nrho cov txheej txheem tsis yog- sib tsoo, tsis yog- sib cuag, thiab muaj cua sov tsawg heev- thaj chaw cuam tshuam, ua rau nws tsim tshwj xeeb rau qhov siab - qhov tseeb lossis qhov xav tau qhov zoo nkauj. Txawm li cas los xij, tus nqi ntawm nws cov cuab yeej tshwj xeeb yog qhov siab.
Tsis tas li ntawd, rau cov khoom siv tseem ceeb, cov khoom siv - raws li cov txheej txheem txhim kho tuaj yeem raug txiav txim siab. Piv txwv li, siv cov khoom siv vuam nrog cov ntsiab lus tsis tshua muaj silicon lossis titanium-cored vuam hlau, tswj cov txheej txheem vuam nws tus kheej, kuj tuaj yeem txo qhov tsim ntawm vuam spatter thiab spatter rau qee qhov.
Tau kawg, tsis hais txog kev siv thev naus laus zis, lub hom phiaj yog los tsim cov hlau huv huv.