Hauv kev lag luam hlau xws li steel thiab tsis yog -ferrous hlau, dov mills yog cov cuab yeej tseem ceeb rau kev ua tiav cov yas deformation ntawm cov ntaub ntawv. Ntawm lawv, cov phiajcim liner, uas yog ib qho tseem ceeb ntawm kev txhawb nqa thiab kev tiv thaiv cov khoom ntawm lub tshuab dov zeb yob, ncaj qha cuam tshuam rau dov qhov tseeb, cov khoom zoo, thiab cov cuab yeej ua haujlwm ruaj khov. Raws li kev ua haujlwm ntawm lub sijhawm ntev - raug cuam tshuam rau lub zog dov loj, siab - muaj kev cuam tshuam ntau zaus, thiab kev sib txhuam, hnav yog qhov tshwm sim tsis tuaj yeem. Kev nkag siab txog kev hnav kev tshawb fawb thiab siv txoj hauv kev kho kom zoo yog qhov tseem ceeb rau kev tswj cov nqi tsim khoom thiab ua kom muaj kev tsim khoom tas mus li.
Ua thiab cuam tshuam ntawm Rolling Mill Liner Plate Wear
Liner phaj hnav yog cov txheej txheem nyuaj thiab ua tiav, feem ntau yog los ntawm cov hauv qab no:
1. Mechanical hnav: Qhov no yog qhov tseem ceeb tshaj plaws ntawm kev hnav. Thaum lub sij hawm dov txheej txheem, cov yob siv lub zog loj ntawm cov hlau billet kom deform nws, thiab lub zog no tau xa mus rau cov kab hlau los ntawm cov rooj tog zaum. Nruam micro-kev sib txhuam thiab kev cuam tshuam tshwm sim ntawm daim phiaj liner thiab cov rooj tog zaum thiab cov qhov rooj zeb sawv ntsug, ua rau cov khoom ntog zuj zus thiab txo qhov raug.
2. Kev qaug zog: Lub zog ua haujlwm ntawm lub tshuab dov yog tus cwj pwm los ntawm kev mus sij hawm ntev. Nyob rau hauv lub sij hawm ntev - kev ua haujlwm ntawm kev sib hloov kev ntxhov siab, cov kab nrib pleb yuav tsim nyob rau hauv qhov chaw los yog subsurface txheej ntawm cov kab hlau rhuav. Cov kab nrib pleb no txuas ntxiv nthuav dav thiab sib txuas, thaum kawg ua rau cov khoom tev tawm hauv daim ntawv nyias nyias, tsim pitting lossis spalling.
3. Lubrication tej yam kev mob: Txawm hais tias muaj lubrication ntawm qhov chaw ntawm lub liner daim hlau, nyob rau hauv hnyav load thiab tsawg -ceev tej yam kev mob, nws yog ib qho nyuaj rau tsim ib tug tiav lubrication zaj duab xis, feem ntau ua rau ciam teb lubrication los yog qhuav kev sib txhuam, uas exacerbates nto khawb thiab hnav.
4. Kev txhim kho thiab kev ua kom raug qhov tseeb: Yog tias cov ntawv phaj tsis raug teeb tsa, lossis cov txheej txheem yob yob yob tsis zoo, nws yuav ua rau cov khoom tsis sib xws thiab kev thauj khoom eccentric, ua rau qee cov phaj phaj ua rau muaj kev ntxhov siab ntau, ua rau lawv hnav thiab puas.
Qhov cuam tshuam ncaj qha ntawm cov phaj phaj hnav muaj xws li: poob ntawm axial thiab radial qhov tseeb ntawm cov yob, ua rau tsis sib xws thiab cov duab tsis zoo ntawm cov dov strips; nce hnav tshem tawm ua rau cov khoom siv vibration thiab suab nrov, cuam tshuam rau lub neej ntev ntawm bearings thiab lwm yam khoom siv; thiab nyob rau hauv cov xwm txheej hnyav, liner phaj puas tuaj yeem tshwm sim, ua rau lub sijhawm tsis tau npaj tseg, cuam tshuam cov sijhawm tsim khoom, thiab ua rau muaj kev poob nyiaj txiag loj. II. Cov lus teb ib txwm: Cov kev txwv ntawm kev hloov nrog cov kab tshiab
Thaum ntsib nrog liner hnav, txoj hauv kev ncaj qha tshaj plaws yog los hloov cov khaub ncaws hnav nrog cov khoom seem tshiab. Txoj kev no muaj qhov zoo meej: cov ntaub ntawv tshiab muaj qhov ntev thiab ua haujlwm zoo ib yam, thiab lawv cov kev teeb tsa sai sai rov qab cov khoom siv rau nws qhov kev tsim qauv qub, ua rau kev ua haujlwm ncaj qha.
Txawm li cas los xij, kev cia siab ib leeg los ntawm kev hloov cov khoom tshiab muaj cov kev txwv tseem ceeb:
Tus nqi siab: Liners rau loj dov mills feem ntau yog forged los ntawm siab - zoo alloy steel, thiab txhua chav tsev yog kim. Kev hloov ntau zaus sawv cev rau kev siv nyiaj ntau ntawm cov khoom seem.
Logistical Siab: Los ntawm kev yuav khoom thiab kev thauj mus los rau kev tswj cov khoom muag, cov peev txheej tseem ceeb thiab cov khoom lag luam yuav tsum muaj. Yog tias qhov tshwm sim sai thiab hnyav hnyav thiab cov khoom muag tsis txaus, tos cov khoom tshiab tuaj txog tuaj yeem ua rau lub sijhawm poob ntev.
Cov Khoom Siv Khib Nyiab: Hnav feem ntau yog tsom rau hauv thaj chaw ua haujlwm hauv cheeb tsam. Hloov tag nrho cov liner txhais tau tias muab pov tseg ntau ntawm cov khoom siv uas tseem ua haujlwm, uas cuam tshuam rau lub hauv paus ntsiab lus ntawm kev txuag cov peev txheej.
Txwv Adaptability: Cov khoom siv thiab kev ua tau zoo ntawm cov txheej txheem tshiab liners raug kho thiab tsis tuaj yeem "customized" los ua kom zoo rau cov kev hnav tshwj xeeb ntawm cov zeb sawv thiab cov khoom.
Kho Technology rau Hnav Liners: Tus nqi thiab txoj hauv kev
Muab piv rau kev hloov ua tiav, kho thiab rov siv dua cov ntaub qhwv lub tsho yog dhau los ua kev lag luam ntau dua thiab kev xaiv hom phiaj. Lub tswv yim tseem ceeb ntawm kev kho yog los kho qhov loj thiab cov duab ntawm lub hauv paus hnav thiab txhim kho nws cov kev ua tau zoo hauv zos los ntawm kev tsim khoom ntxiv thiab lwm txoj hauv kev.
Tam sim no, cov txheej txheem kho tshuab tseem ceeb suav nrog:
1. Surfacing Repair: Qhov no yog cov cuab yeej siv dav tshaj plaws. Nws suav nrog kev tso ib lossis ntau txheej ntawm cov khoom siv vuam vuam mus rau qhov hnav ntawm lub liner siv txoj hauv kev xws li arc vuam thiab roj tiv thaiv vuam. Tus yuam sij rau txoj kev kho yog:
Kev sib txuam ntawm cov khoom siv: Raws li cov tshuaj muaj pes tsawg leeg ntawm cov khoom siv liner thiab kev ua haujlwm (xws li lub siab, qhov cuam tshuam, thiab qhov kub thiab txias), xaiv qhov sib txuam lossis zoo dua vuam hlau / electrodes los xyuas kom muaj kev sib raug zoo ntawm cov txheej txheem kho thiab cov khoom siv hauv paus, thiab qhov hardness, hnav tsis kam, thiab tawg tsis kam ua tau raws li qhov xav tau.
Kev Tswj Xyuas Txheej Txheem: Cov txheej txheem vuam nruj yuav tsum tau tswj xyuas qhov kub thiab txias, kev sib cuam tshuam, vuam tam sim no thiab qhov hluav taws xob, thiab tom qab- vuam qeeb txias ntsuas los tiv thaiv kev vuam ntau dhau ua rau deformation lossis tawg. Machining: Tom qab surfacing welding tiav, ntau yam kev ua haujlwm xws li milling thiab sib tsoo yog siv los kho qhov tseeb qhov tseeb thiab qhov chaw tiav ntawm cov kab kho kom zoo raws li cov qauv tsim.
Qhov zoo ntawm surfacing welding kho yog nyob rau hauv loj thickness ntawm lub kho txheej thiab siab bonding zog, tso cai rau hloov tau cov ntaub ntawv ntxiv raws li hnav tej yam kev mob. Cov kev sib tw muaj xws li cov kev xav tau siab tshaj plaws rau cov neeg ua haujlwm, kev pheej hmoo ntawm kev qhia qhov tsis xws luag vim cov txheej txheem tsis raug, thiab qhov ua tau ntawm cov cua sov- muaj kev cuam tshuam thaj chaw hloov cov khoom hauv zos ntawm cov khoom siv hauv paus.
2. Thermal Spraying Repair: Cov thev naus laus zis no suav nrog cov tshuaj molten lossis semi- cov ntaub ntawv molten (xws li hlau alloys, ceramics, los yog hlau-ceramic composites) mus rau lub pre-kho liner nto siv lub siab - gas kwj los ua txheej txheej. Feem ntau siv txoj kev muaj xws li arc txau, nplaim hluav taws, thiab tshuaj tsuag plasma.
Nws qhov zoo muaj xws li qhov kub thiab txias ua haujlwm, tsis tshua muaj hluav taws xob nkag mus rau cov ntaub ntawv hauv qab, thiab tsis tshua muaj kev pheej hmoo ntawm deformation; nws tuaj yeem txau ntau yam siab - cov ntaub ntawv ua tau zoo, txhim kho qhov hnav tsis kam thiab corrosion kuj; thiab txheej thickness yog tswj tau.
Cov kev txwv muaj xws li kev sib txuas ntawm cov txheej txheej thiab cov khoom siv hauv paus yog cov neeg kho tshuab (qee cov txheej txheem tuaj yeem ua tiav metallurgical bonding), thiab lub zog sib txuas yuav qis dua li ntawm cov txheej txheej saum npoo thaum muaj kev cuam tshuam loj; txheej txheej yog feem ntau nyias thiab tsis haum rau kho qhov sib sib zog nqus hnav.
3. Composite Repair Technology: Hauv kev siv cov tswv yim, cov thev naus laus zis sib xyaw feem ntau yog siv los txhawb lawv lub zog thiab txo lawv qhov tsis muaj zog. Piv txwv li, rau cov cheeb tsam uas hnav hnyav heev, kev siv vuam surfacing yog siv los sau cov cheeb tsam ua ntej, thiab tom qab ntawd ib txheej ntawm hnav ntau dua - cov khoom tshwj xeeb uas tiv taus yog txau rau saum npoo; los yog laser cladding tshuab yog siv, uas tuaj yeem ua tiav metallurgical bonding ntawm hmoov cov ntaub ntawv nrog cov khoom siv hauv paus nrog tus nqi qis heev, ua rau cov thermal deformation tsawg dua thiab cov qauv denser, tab sis cov cuab yeej siv thiab cov nqi ntau dua.
Sib piv Kev Tshawb Fawb Kev Kho thiab Hloov Kho
Kev xaiv ntawm kev kho thiab hloov yuav tsum muaj kev txiav txim siab raws li cov txheej txheem thiab kev lag luam:
Hais txog tus nqi: Tus nqi kho yog feem ntau tsuas yog 30% -60% ntawm tus nqi ntawm kev yuav khoom tshiab, uas yog qhov txiaj ntsig tseem ceeb. Qhov no yog qhov tseeb tshwj xeeb tshaj yog rau cov hnab ntim loj thiab kim, qhov chaw khaws nyiaj tshwj xeeb yog qhov tseem ceeb.
Hais txog lub sij hawm voj voog: Lub voj voog kho feem ntau luv dua qhov kev yuav khoom thiab kev tsim khoom ntawm cov khoom tshiab, tshwj xeeb tshaj yog rau cov tuam txhab nrog rau ntawm - muaj peev xwm kho qhov chaw lossis cov koom tes kho hauv zos, uas tuaj yeem txo qis sijhawm.
Hais txog kev ua tau zoo: Kho thev naus laus zis muaj qhov ua tau ntawm "kev ua tau zoo hloov kho dua tshiab." Los ntawm kev siv ntau dua- tiv taus thiab cuam tshuam- cov ntaub ntawv kho kom tsis muaj zog, cov ntsiab lus tsis muaj zog uas yav dhau los hnav tuaj yeem ntxiv dag zog, thiab lub neej ntev ntawm cov khoom siv kho dua tshiab tuaj yeem tshaj qhov qub qub. Qhov kev ua tau zoo ntawm ib feem tshiab, txawm li cas los xij, yog kho.
