- Taw qhia rau cov txheej txheem vuam ntau zaus
Tom qab cov hlau sawb nkag mus rau hauv lub tshuab tsim thiab ua ib lub raj cylindrical dawb paug tom qab slitting, uncoiling, leveling, shearing taub qab vuam, voj cia thiab lwm yam txheej txheem, nws ces dhau los ntawm induction kauj los yog hu rau vuam lub kaum sab xis, thiab lub magnetic teb nyob ze ntawm lub induction. coil yog induced. Cov hluav taws xob tam sim no dhau los ntawm ntug ntawm cov hlau sawb, thiab cov ntug ntawm cov hlau sawb yog rhuab vim cov cua kub tsis kam ua los ntawm nws tus kheej tsis kam. Lub ntug ntawm lub rhuab steel sawb yog extruded los ntawm ib tug extrusion roller los tsim ib tug weld. High-frequency welding tsis ntxiv hlau lossis vuam hlau, thiab yog ib hom forge vuam. Tus nqi ntawm lub siab los ntawm extrusion yog qhov txuas tseem ceeb. Yog tias tus nqi extrusion raug tswj kom tsim nyog thiab ruaj khov, yuav tsis muaj cov hlau molten lossis oxide nyob rau ntawm qhov chaw fusion.
Lub tshav kub-tshuaj tiv thaiv yog zoo li lub duav nruas nruas vim hais tias lub high-frequency tam sim no nkag mus rau hauv lub ntug ntawm steel sawb nkag mus rau hauv lub steel sawb los ntawm qhov kawg thiab ob sab ntawm steel strip ntug los ua kom sov. Cov xim ntawm thaj chaw muaj kev kub ntxhov yog me ntsis tsaus dua li lub hauv paus hlau vim tias cov pa roj carbon diffuses mus rau ntawm ntug ntawm cov rhuab steel sawb thaum vuam thiab yog absorbed ntawm ntug ntawm cov hlau sawb thaum lub vuam txias. Cov pa roj carbon tshwj xeeb ze rau ntawm ntug ntawm cov hlau sawb yog oxidized rau hauv CO los yog CO2, thiab cov hlau seem tsis muaj cov pa roj carbon thiab ua xim sib dua.
Cov hlau streamlines pom nyob rau hauv cov qauv metallographic tiag tiag yog cov high-carbon cheeb tsam tau dov mus rau hauv tiaj tus, tsis tu ncua dav hlau thaum lub billet yog dov rau hauv steel strips. Qhov loj ntawm cov hlau streamline nce lub kaum sab xis feem ntau yog siv los ntsuas qhov kev ntxhov siab thaum vuam.
- Feem ntau welding defects ntawm high-frequency welded kav
Ntau yam vuam tsis xws luag yuav tshwm sim nyob rau hauv high-frequency yeeb nkab ua. Txhua qhov tsis xws luag muaj ntau lub npe sib txawv. Tam sim no tsis muaj kev lees paub lub sijhawm ua haujlwm. Lub npe ntawm qhov tsis xws luag yog muab hauv qab no. Lwm lub npe ntawm qhov tsis xws luag yog nyob rau hauv kab lus: aInclusion (Dub overburned oxide); b Pre-arc (dawb overburned oxide); c fusion tsis txaus (qhib seams); d Tsis txaus ntug fusion (ntug nthwv dej); e Tsis txaus fusion nyob rau hauv nruab nrab (txias vuam nyob rau hauv nruab nrab); f nplaum welding (txias vuam); g cam khwb cia welding (nkaws vuam); h pores (pinholes); kuv dhia welding. Txawm hais tias cov no yog qee qhov tsis xws luag, lawv yog cov feem ntau siv vuam vuam tsis xws hauv ntau lawm.
1. Inclusions (dub burnt oxide)
Hom kev tsis zoo no yog tias cov hlau oxide tsis yog clamped ntawm fusion nto raws li cov hlau molten yog extruded. Cov hlau oxides no yog tsim nyob rau saum npoo ntawm cov hlau molten ntawm lub V-shaped qhib. Thaum lub V-shaped qhib, yog hais tias txoj kev ceev ntawm ntug ntawm cov hlau sawb yog tsawg tshaj li melting ceev thiab melting ceev yog siab tshaj li molten hlau tawm ceev, molten hlau oxide yog tsim tom qab lub apex ntawm V- zoo li qhib. Ib qho nqaim kiv cua zoo li thaj tsam ntawm cov hlau thiab hlau oxides. Cov molten hlau thiab hlau oxides no tsis tuaj yeem raug tshem tawm tag nrho tom qab extrusion ib txwm, yog li tsim ib qho chaw suav nrog.
Tom qab cov weld yog flattened thiab tawg, inclusions tau yooj yim pom ntawm qhov tawg ntawm qhov vuam. Piv nrog rau cov pob txha pob txha ntawm lub vuam, qhov kev suav nrog muaj qhov sib tsoo thiab tsis muaj hlau nplaum. Cov teeb meem zoo li no tuaj yeem tshwm sim ib leeg lossis hauv cov saw hlau. Thaum lub V-shaped qhib lub kaum sab xis yuav nqaim, piv txwv li, lub kaum sab xis yog tsawg dua 4 degrees lossis Mn / Si piv hauv cov hlau sawb tsawg dua 8: 1, qhov tshwm sim ntawm kev suav nrog nce ntxiv. Txawm li cas los xij, Mn / Si piv yog qhov nyuaj rau tswj dua li lwm yam cuam tshuam.
Kev ntsuas los tiv thaiv kev suav nrog: a. Tswj lub V-shaped qhib lub kaum sab xis ntawm 4 degree thiab 6 degree; b. Txhim khu kev txhim kho cov cuab yeej thiab cov khoom siv txhim kho kom ruaj khov V-shaped qhib ntev; c. Tsawg vuam kub kom tau txais cov vuam zoo zoo; d. Zam qhov sib piv ntawm Mn / Si hauv cov tshuaj muaj pes tsawg leeg ntawm cov hlau sawb tsawg dua 8: 1 (tsis txhob muaj tsawg dua 4: 1 thaum qhov kev xav tau ntawm qhov toughness tsawg).
2. Pre-arc (dawb perburnt oxide)
Nws tsis yog qhov tseeb los hu rau hom kev tsis zoo no "oxide" vim tias tsis muaj teeb meem txawv teb chaws sandwiched ntawm fusion nto. Qhov tseeb, nws tsis txaus fusion tshwm sim los ntawm pre-arc. Feem ntau, burrs lossis xeb poob rau pem hauv ntej ntawm sab saum toj ntawm V-shaped qhib los tsim ib tug choj, ua rau luv luv Circuit Court thiab ua rau tam sim no dhia thiab tsim ib tug pre-arc phenomenon. Qhov luv-circuit tam sim no hloov cov kev taw qhia ntawm tam sim no thiab txo qhov kub ntawm qhov chaw nres nkoj V-shaped.
Instantaneous shunting ua rau me me tsis xws luag, thiab feem ntau qhov ntev ntawm qhov tsis xws luag tsis tshaj phab ntsa thickness. Los ntawm cov vuam tawg koj tuaj yeem pom lub dav hlau ci ntsa iab, puag ncig los ntawm cov pob txha tawg
Nqus welded yeeb nkab ntau lawm tsis muaj xeb los yog burrs ua rau luv luv Circuit Court, tab sis lub nqaim V-shaped lub kaum sab xis thiab high voltage kuj yuav ua rau pre-arcing. Nws yog qhov tshwm sim arc paug tshwm sim los ntawm qhov hluav taws xob siab ntawm cov npoo ntawm ob lub steel strips uas ua rau tib yam tsis xws luag.
Kev ntsuas los tiv thaiv qhov tsis xws luag ua ntej arc: a. Tswj lub V-shaped qhib lub kaum sab xis ntawm 4 degree thiab 6; b. Txo ntug trimming burrs; c. Kev kho ntug tsim nyog kom txo tau cov hlua steel ntug kev puas tsuaj; d. Khaws cov dej txias kom huv si thiab tsis ntws mus rau qhov qhib V-shaped .
3. Tsis txaus fusion (qhib seams)
Raws li lub npe qhia, cov npoo ntawm ob lub steel strips tsis tag fused los tsim ib tug zoo weld. Lub ntug ntawm lub seam qhib yog xiav, qhia tau hais tias cov hlau sawb tau rhuab, tab sis cov npoo ntawm cov hlau sawb yog tiaj tus thiab du, thiab qhov chaw weld tsis tag fused. Qhov cuam tshuam ncaj qha tshaj plaws yog qhov tsis txaus vuam cua sov, tab sis lwm yam tseem ceeb yuav tsum tau txiav txim siab, xws li vuam cua sov input, V-shaped qhib lub kaum sab xis thiab V-shaped cua sov ntev, sib nqus pas nrig installation txoj hauj lwm thiab cua txias, induction coil loj. , thiab lwm yam. Cov yam ntxwv no tuaj yeem ua rau tus kheej lossis ua ke los tsim qhov tsis xws luag. Tab sis qee zaus cov cua sov tsim nyog yuav tsim cov seams. Qhov no yog vim hais tias tus nqi ntawm extrusion tsis txaus, cov oxides tseem nyob rau saum npoo ntawm cov hlau molten, thiab cov npoo yog melted tab sis tsis fused ua ke. Tom qab lub weld dhau los ntawm cov menyuam extrusion, cov hlau sawb rebounds rau daim Slit.
Kev ntsuas los tiv thaiv tsis txaus fusion: a. Txuas lub vuam cua sov nkag mus rau cov khoom siv thiab vuam ceev; b. Txoj hauj lwm ntawm tus pas nrig sib nqus tshaj qhov nruab nrab ntawm cov menyuam extrusion los ntawm 3.18mm; c. Qhov ntev ntawm V-shaped qhib tsis pub tshaj qhov ntev ntawm cov yeeb nkab txoj kab uas hla; d. Lub V-shaped qhib Lub kaum sab xis tsis tshaj 7 degree; e. Qhov sib txawv ntawm txoj kab uas hla ntawm induction coil thiab sab nraud ntawm cov yeeb nkab steel tsis ntau tshaj 6.35mm; f. Qhov dav ntawm steel sawb yog tsim nyog thiab ua tau raws li qhov xav tau ntawm cov yeeb nkab ntau lawm kab.
4. Tsis txaus ntug fusion (ntug nthwv dej)
Yog vim li cas rau qhov tsis txaus fusion ntawm ntug ntawm lub vuam yog tias tsis muaj hlau nyob rau hauv fusion nto. Cov kev tsis zoo no feem ntau tshwm sim rau sab nraud lossis sab hauv ntawm ntug ntawm cov hlau sawb, lossis zoo ib yam li cov teeb meem uas tshwm sim los ntawm kev kub hnyiab oxides. Hom kev puas tsuaj no yog tshwm sim los ntawm qhov vuam raug tsoo thiab tawg ntawm qhov chaw 3 teev. Cov pob txha tawg yog tiaj tus thiab tsis muaj xim hlau ci.
Lwm daim ntawv yog tshwm sim los ntawm bulging, uas ua rau lub sab nraud kub ntawm ntug ntawm steel sawb yuav tsum tau qis dua sab hauv. Cov pob txha tawg yog silver-grey. Lub bulging defect yog ib daim ntawv ntawm over-burned oxide thiab tsis txaus fusion.
Kev tiv thaiv kev kub hnyiab thiab tsis txaus fusion: a. Cov npoo ntawm cov hlau strips yog ncaj thiab sib luag; b. Siv cov nyiaj extrusion loj dua; c. Yog hais tias qhov tawg los ntawm lub pob yog nyiaj-grey, siv lub vuam loj dua cov khoom siv hluav taws xob.
5. Tsis txaus fusion nyob rau hauv nruab nrab (txias vuam nyob rau hauv nruab nrab)
Tom qab qhov tsis txaus fusion weld puas lawm, ntu nruab nrab ntawm phab ntsa tuab zoo li lub tiaj tus, silvery grey band nrog fibrous npoo. Qhov zoo ntawm vuam tsis zoo no yog tshwm sim los ntawm lub zog xav tau los ntawm vuam ceev tshaj qhov ntsuas lub zog ntawm lub tshuab vuam, thiab tag nrho lub ntsej muag kawg ntawm cov hlau strip ntug tsis muaj sij hawm txaus kom sov rau qhov zoo tshaj plaws kub thiab cua sov qhov tob yuav tsum tau rau lub vuam. Tsis txaus fusion nyob rau hauv nruab nrab kuj tuaj yeem tshwm sim los ntawm kev tawm tsis txaus thiab tsis tiav ntawm cov hlau molten ntawm qhov sib koom ua ke.
Txhawm rau tiv thaiv tsis txaus fusion hauv nruab nrab: a. Ua kom lub zog ntawm lub tshuab vuam; b. Nce tus nqi ntawm vuam extrusion; c. Ua kom qhov ntev ntawm V-shaped qhib lossis txo qhov vuam ceev.
6. Nplaum vuam (txias vuam)
Nplaum vuam tsis xws luag tsis tuaj yeem ntes tau siv cov kev tshuaj ntsuam xyuas tam sim no thiab yog li ntawd qhov kev puas tsuaj loj tshaj plaws hauv vuam vuam tsis zoo. Qhov sib koom ua ke tsim los ntawm cov nplaum vuam tsis muaj qhov khoob, tuaj yeem xa cov cim ultrasonic, thiab tsis tuaj yeem tshawb pom los ntawm electromagnetic. Txawm li cas los xij, nws tawg thaum crushed, thiab qhov tawg yog tiaj thiab nkig. Piv nrog rau tag nrho fused weld tawg, nws yog me ntsis fibrous. Qee qhov khoob tuaj yeem kuaj pom. Yog tias koj saib cov ntu transverse metallographic, koj tuaj yeem pom tias HAZ (tshav kub cuam tshuam cheeb tsam) yog nqaim heev, tsis muaj kab dawb fusion, thiab cov hlau streamline nce lub kaum sab xis me heev. Kev ntsuas los tiv thaiv kev sib tsoo vuam: a. Rau qhov sib txawv ntawm cov khoom siv thiab vuam ceev, siv lub zog vuam txaus; b. Tag nrho extrusion thiab nce steel sawb dav.
7. Cam khwb cia hlau (nplaum vuam)
Cam khwb cia hlau txhais tau hais tias tag nrho cov hlau molten ntawm qhov sib koom ua ke yog tsis tawm, thiab cov cam khwb cia hlau nyob rau hauv fusion nto muaj oxides thiab overburned oxides. Lub pob txha morphology hloov raws li qhov seem ntawm cov hlau cam khwb cia. Tab sis feem ntau ntawm lawv muaj lub tiaj tus, nkig morphology. Metallographic ntsuam xyuas qhia tau hais tias muaj cam khwb cia hlau rau ntawm qhov chaw sib txuas. Cam khwb cia welds tawg thaum flattened. Hom kev tsis zoo no muaj cua sov txaus los yaj cov ntug ntawm cov sawb, tab sis tsuas yog ib qho yooj yim yaj.
Kev tiv thaiv kev cam khwb cia welding: a. Ua kom vuam tawm; b. Nce steel sawb dav.
8. Stomata (pinhole)
Lub qhov hws ntawm qhov sib txuas ntawm qhov sib txuas yog tshwm sim los ntawm qhov kub-kub vuam tab sis tsis txaus tawm, thiab cov pob txha tawg yog fibrous. Spherical ci dawb me ntsis yog random faib rau tag nrho cov pob txha. Thaum cov pob dawb tshwm rau ntawm phab ntsa sab nrauv, qhov chaw ntawm cov pob dawb tig dub vim yog oxidation. Cov pores me me tuaj yeem pom ua ntej cov burrs sab nraud raug tshem tawm, thiab lawv tuaj yeem pom ntawm txoj kab fusion tom qab cov burrs sab nraud raug tshem tawm. mus rau stomata.
Kev ntsuas los tiv thaiv qhov pores: a. Txo cov vuam cua sov nkag; b. Nce tus nqi ntawm extrusion.
9. dhia vuam
Dhia soldering los ntawm ntau hom. Nquag, raws li pom nyob rau hauv daim duab 14. Hom kev tsis xws luag no muaj me ntsis tsis tu ncua thiab tsis tu ncua. Qhov tsis xws luag nyob rau sab nraud ntawm phab ntsa tuab yog zoo ib yam li wavy tsis xws luag, thiab qhov sib nrug yog ib qho tseem ceeb ntawm ntau lub zog zaus (60HZ).
(1 hauv =25.4mm, 1 ft=304.8mm)
Kev ntsuas los tiv thaiv dhia vuam: a. Txhim kho cov khoom siv lim rau vuam tam sim no; b. Kos lub input theem voltage; c. Xyuas cov rollers thiab shafts.
- Cov lus qhia rau kev tiv thaiv qhov tsis xws luag
Hauv kev tsim khoom tiag tiag, qhov tsis xws luag feem ntau tshwm sim los ntawm kev sib xyaw ua ke ntawm ntau yam. Qhov qhib V-shaped nqaim tsis tas yuav tsim cov oxide hlawv tshwj tsis yog tias tus nqi extrusion tsawg dua li qhov yuav tsum tau ua. Qhov me me ntawm extrusion tej zaum yuav tshwm sim los ntawm ib tug me ntsis nqaim slitting dav ntawm lub steel sawb, hnav cov cuab yeej, los yog tsis tsim nyog installation ntawm cov khoom.
Vuam tsis xws kuj tuaj yeem tshwm sim los ntawm cov laj thawj uas tsis yog qhov chaw vuam. Piv txwv li, kev vuam txias tuaj yeem ua rau cavitation (kev khiav tawm) hauv lub twj tso kua mis txias, uas tsis tuaj yeem ua kom txias ntawm cov hlau nplaum. Cov pas nrig hlau nplaum heats tam sim ntawd, ua rau tam sim no mloog zoo rau ntawm qhov chaw nres nkoj V-shaped. Tsis muaj zog, tam sim no yog ua raws li nram qab ntawm cov yeeb nkab steel, cua sov ntawm V-shaped lub qhov ncauj raug txo, thiab txias vuam tshwm sim. Ua ntej lub twj tso kua mis txias tsis ua haujlwm kom zoo thiab cov pas nrig sib nqus ua tsis tiav, ua kom lub vuam cov khoom siv hluav taws xob tuaj yeem tiv thaiv qhov tshwm sim ntawm qhov txias vuam tsis xws luag.
Txoj hauv kev zoo tshaj plaws los tiv thaiv qhov tsis xws luag yog txhawm rau txheeb xyuas cov hauv paus hauv paus ntawm qhov tsis xws luag thiab sim sau ntau yam kev ua haujlwm uas yuav ua rau muaj qhov tsis xws luag. Nws yog qhov muaj txiaj ntsig zoo los txiav txim siab txog qhov tsis sib xws xws li: kev ua haujlwm dav, vuam ceev, lub vijtsam ntws, lub vijtsam siab, daim phiaj ntws, tus nqi extrusion, thiab lwm yam. . Thaum lub sij hawm tsim khoom, tus nqi teeb tsa yuav me ntsis siab dua tus nqi ib txwm, tab sis ob peb yam sib txawv me ntsis tshaj qhov yuav tsum tau muaj nyob rau tib lub sij hawm, thiab cov txiaj ntsig tau txaus los ua qhov tsis xws luag.
- Xaus
1. Feem ntau cov vuam tsis zoo yog tshwm sim los ntawm kev teeb tsa tsis raug lossis hloov kho ntawm chav tsev;
2. Xaiv cov phiaj xwm tsim khoom tsim nyog, saib xyuas cov ntaub ntawv kev ua haujlwm txhua hnub, thiab kev cob qhia cov vuam siv hluav taws xob tsis tu ncua yuav pab txo qhov tsis xws luag;
3. Txhim kho qhov zoo ntawm trimming thiab ntug kev thiab cov txheej txheem coil lub zog cia, uas yuav pab txo qis kev puas tsuaj ntawm ntug;
4. Kev tu ua ntej tuaj yeem tiv thaiv qhov tsis xws luag los ntawm kev hnav lossis kev puas tsuaj ntawm cov cuab yeej.
