Tianjin Lefin Industrial Co., Ltd yog ib qho ntawm cov tuam txhab kev paub ntau tshaj plaws thiab cov neeg muag khoom ntawm dab tsi ua rau cov phab ntsa tsis sib xws hauv cov yeeb nkab steel hauv Suav teb. Thov koj xav tias dawb mus yuav cov khoom zoo yog dab tsi ua rau cov phab ntsa tsis sib xws hauv cov yeeb nkab steel los ntawm peb lub hoobkas. Kev pabcuam zoo thiab tus nqi tsim nyog muaj.
Cov phab ntsa tuab tsis sib xws hauv cov kav hlau dov (tshwj xeeb yog seamless steel kav, xws li kub- dov seamless steel kav thiab txias- dov seamless steel kav) yog ib qho teeb meem zoo hauv cov txheej txheem ntau lawm. Cov laj thawj tseem ceeb tuaj yeem raug ntaus nqi rau plaub pawg loj: cov khoom siv raw, khoom siv, txheej txheem, thiab kev ua haujlwm. Tshwj xeeb, nws tuaj yeem tawg mus rau hauv cov ncauj lus kom ntxaws hauv qab no, uas tau piav qhia hauv kev nthuav dav ua ke nrog lub hauv paus ntsiab lus dov (xws li tho, nruam dov, thiab txo cov txheej txheem tseem ceeb):
I. Raw Material Factors: Qhov "Inherent Basis" ntawm cov phab ntsa tsis sib xws
Cov khoom siv raw yog qhov pib ntawm cov yeeb nkab steel dov. Yog hais tias cov ntaub ntawv raw lawv tus kheej muaj qhov tsis xws luag, nws yuav ncaj qha mus rau deviations nyob rau hauv lub phab ntsa thickness ntawm cov khoom tiav, thiab nws yog ib qho nyuaj rau tag nrho kho lawv nyob rau hauv cov txheej txheem tom ntej.
1. Cov teeb meem zoo ntawm lub raj xa hluav taws xob (steel billets)
- Cov phab ntsa tsis sib xws / txoj kab uas hla ntawm lub raj billet:
Tube billet (xws li round steel billet, nruam casting billet) nws tus kheej muaj ellipticity, txoj kab uas hla fluctuations los yog lub zos thickness/thinness (piv txwv li, lub "loos cheeb tsam", "shrinkage kab noj hniav", "segregation" ntawm lub nruam casting billet), thiab cov hlau deformation thaum dov yog inconsistent - cov hlau ntws nyob rau hauv lub thickness ntawm lub sab thiab nyias. ceev, thaum kawg ua rau cov phab ntsa tsis sib xws ntawm cov khoom tiav.
- Internal defects ntawm lub raj billet:
Lub raj xa hluav taws xob muaj qhov sib txuam, qhov pores, tawg, thiab lwm yam. Thaum lub sij hawm dov, lub plasticity ntawm cov hlau nyob rau hauv qhov chaw tsis zoo yog qhov tsis zoo, thiab qhov deformation tsis tas yuav ua rau cov phab ntsa hauv zos tuab dhau lawm (cov hlau ntawm qhov chaw tsis zoo tsis tuaj yeem sau tau zoo) los yog tuab heev (hlau nyob ib ncig ntawm qhov tsis xws luag).
- Tsis sib xws tube billet kub:
Thaum lub raj xa hluav taws xob cua sov (xws li hauv lub nplhaib cua sov cua sov), cua sov tsis sib xws, nrog rau qhov kub thiab txias hauv cheeb tsam (cov hlau yog mos heev, cov dej ntws nrawm dhau) lossis qis dhau (cov hlau hnyav dhau lawm, cov dej ntws yog thaiv), uas ua rau muaj qhov sib txawv ntawm phab ntsa tuab tom qab dov (piv txwv li, sab sauv ntawm lub raj billet lub phab ntsa yog qhov kub thiab txias, tab sis sab sauv ntawm cov phab ntsa ntawm cov phab ntsa yog qhov siab, tab sis cov phab ntsa ntawm cov phab ntsa yog siab heev.
2. Cov teeb meem zoo ntawm cov yeeb nkab nyoos (semi-cov khoom tiav tom qab perforation)
Thawj kauj ruam hauv seamless steel yeeb nkab dov yog "piercing" (threading lub raj tsis muaj nyob rau hauv lub hollow blank raj). Yog tias cov phab ntsa tuab ntawm lub raj dawb paug nws tus kheej tsis sib npaug, nws yog qhov nyuaj los kho nws hauv cov txheej txheem txuas ntxiv txuas ntxiv thiab sizing.
Kev kho tsis raug ntawm lub khob hliav qab thiab qhov chaw sab saum toj ntawm cov yob hauv lub tshuab tho (xws li tus ntoo khaub lig- dov tho tshuab) ua rau "eccentric phab ntsa thickness" (ib sab tuab thiab lwm sab nyias) los yog "kauv tsis sib luag phab ntsa thickness" (hloov thickness nyob rau hauv ib lub voj voog raws li qhov ntev ntawm cov yeeb nkab steel) nyob rau hauv cov yeeb nkab ntxhib.
Lub ellipticity ntawm lub raj dawb paug tshaj tus qauv: Tus ntoo khaub lig- seem ntawm lub raj dawb paug tsis yog puag ncig, thiab cov hlau deformation nyob rau hauv lub voj voog ncig thaum dov yog txawv, nws thiaj li ua rau cov phab ntsa tuab tsis sib xws.
II. Cov khoom siv: Qhov "hardware guarantee" rau dov qhov tseeb tau ua tsis tiav
Lub precision, hnav khaub ncaws thiab kev sib haum xeeb ntawm cov cuab yeej ncaj qha txiav txim siab qhov sib xws ntawm cov hlau deformation thiab yog cov tub ntxhais siv tshuab ua rau cov phab ntsa tsis sib xws.
1. Kev sib txawv / hnav ntawm cov khoom tseem ceeb ntawm lub tshuab dov
- Cov teeb meem ntawm cov menyuam:
Kev ua haujlwm raug ntawm cov yob lawv tus kheej (xws li kev ua haujlwm ntawm cov dov tsis tu ncua thiab cov yob ntawm cov tshuab sizing) tsis txaus (xws li cov yob txoj kab uas hla tsis sib xws thiab qhov sib txawv ntawm lub cylindricity ntawm yob nto), uas ua rau lub zog tsis sib xws ntawm cov hlau thaum dov.
Kev hnav tsis sib xws ntawm cov yob tom qab siv (xws li hnav hnyav ntawm ib sab), qhov sib txawv ntawm cov yob tsis sib xws (loj ntawm ib sab thiab me dua ntawm lwm qhov), thiab qhov sib txawv thickness thaum hlau hla dhau.
Qhov kub tsis sib xws ntawm cov yob (xws li thaiv cov dej txias, cov cua sov hauv zos thiab nthuav dav) ua rau muaj kev hloov pauv ntawm qhov sib txawv ntawm qhov yob.
- Top/mandrel qhov teeb meem:
Sab saum toj ntawm lub tshuab tho thiab lub mandrel ntawm lub nruam dov zeb (siv los txhawb lub puab phab ntsa ntawm cov yeeb nkab steel) yog eccentric (tsis ua raws li qhov nruab nrab ntawm cov yob), uas ua rau ib sab ntawm lub puab phab ntsa ntawm cov yeeb nkab steel yog ze ze rau lub mandrel thiab qhov sib txawv ntawm lwm sab yog loj heev, tsim ib qho "puab phab ntsa ntawm cov tuab tuab).
Hnav, deformation ntawm mandrel (xws li lub zos thinning), los yog tsis zoo nto lubrication (hlau adhesion) tuaj yeem ua rau cov phab ntsa thickness sib txawv ntawm cov phab ntsa sab hauv.
- Kev sib txawv ntawm cov cuab yeej saib xyuas :
Cov ntawv qhia thiab cov khoom siv saib xyuas (xws li daim phiaj qhia thiab cov ntawv qhia cov menyuam) yog siv los coj cov raj xa dej / raj dawb rau hauv cov yob. Yog hais tias txoj hauj lwm ntawm cov lus qhia thiab tus neeg saib xyuas yog offset los yog qhov hnav tsis sib xws, nws yuav ua rau lub raj xa hluav taws xob "deviate", thiab thaum lub sij hawm dov, cov hlau quab yuam yuav ua rau ib sab, ua rau cov phab ntsa tsis sib xws.
2. Kev ua tsis tiav ntawm cov khoom sib dhos / qib
Qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov rolling mill thav duab thiab lub hauv paus (xws li lub hauv paus kev daws teeb meem thiab bolt loosening tom qab siv sij hawm ntev -} siv) ua rau cov kab nruab nrab ntawm cov yob thiab cov mandrels tsis raug ua kom zoo (kev ua tsis zoo), thiab cov hlau deformation yog asymmetrical.
Cov kab nruab nrab ntawm txhua qhov sawv ntsug ntawm ntau- sawv ntsug rolling mills tsis sib xws (ntev qhov kev sib dhos yog qhov tsis zoo), thiab cov hlab ntsha tsis zoo tau rov "squeezed thiab deflected" thaum hla dhau, ua rau lub sij hawm tsis sib xws ntawm phab ntsa thickness raws qhov ntev ntawm kev taw qhia.
3. Synchronization teeb meem ntawm kev sib kis
Kev ua txhaum ntawm cov khoom sib kis ntawm cov dov zeb xws li lub cev muaj zog, reducer thiab coupling (xws li kev sib hloov tsis sib haum thiab kev sib kis ntau dhau) ua rau kev sib hloov ceev ntawm txhua yob tsis sib xws, ua rau cov hlau "rub" lossis "sib sib zog nqus", thiab ua rau kev hloov pauv ntawm phab ntsa tuab.
III. Txheej txheem yam: Tsis tsim nyog "parameter matching" thaum lub sij hawm dov txheej txheem
Cov txheej txheem tsis yog tus yuam sij rau kev tswj cov hlau deformation. Tsis tsim nyog parameter Chaw tuaj yeem ua rau muaj qhov tsis sib xws hauv qhov deformation tus nqi, kub thiab ceev, ua rau cov phab ntsa tsis sib xws.
1. Cov txheej txheem kub tsis raug
- Qhov kub thiab txias sib txawv :
Yog hais tias qhov kub thiab txias ntawm lub raj dawb yog siab dhau (overheating), cov hlau yuav muaj cov yas ntau dhau, uas tuaj yeem ua rau "overdeformation" (lub zos thinning). Thaum qhov kub thiab txias tsis dhau (underheated), lub plasticity ntawm cov hlau tsis zoo, qhov deformation kuj loj, thiab "squeezing nyuaj" (loj thickness) yog feem ntau tshwm sim.
Lub sij hawm cua sov tsis txaus lossis kev txuag hluav taws xob tsis sib xws, qhov kub thiab txias sib txawv ntawm sab hauv thiab sab nraud ntawm lub raj xa hluav taws xob los yog nruab nrab ntawm sab saum toj thiab hauv qab (xws li tuab tuab heev ntawm cov raj xa hluav taws xob hauv lub nplhaib cua sov), thiab tsis sib xws thaum lub sij hawm dov.
- Kev tswj qhov kub thiab txias tsis ua haujlwm thaum lub sijhawm dov:
Thaum cov yeeb nkab ntxhib yog dov thiab txias sai heev (xws li cov dej txias dhau los lossis txias tsis sib xws), cov hlau hauv zos hardens ntxov ntxov, ua rau tom qab deformation nyuaj thiab ua rau phab ntsa thickness sib txawv.
Thaum nruam dov, qhov kub hloov pauv ntawm txhua tus ncej loj heev (piv txwv li, qhov hluav taws xob kub ntawm lub hauv ntej ncej yog siab dhau, thiab deformation ntawm lub nraub qaum thaum lub sij hawm dov yog ntau dhau).
2. Deformation tsis sib xws
- Kev teeb tsa tsis raug ntawm qhov sib txawv:
Qhov sib txawv ntawm qhov yob yog ib qho tseem ceeb parameter uas txiav txim siab phab ntsa thickness ntawm cov yeeb nkab steel. Yog hais tias qhov sib txawv ntawm ib sab yog loj heev thaum lub sij hawm hloov ntawm yob qhov sib txawv (xws li tsis calibrating raws li qhov tseeb qhov loj ntawm cov yeeb nkab dawb paug), los yog yob qhov sib txawv ntawm txhua tus ncej tsis tas li (xws li lub yob loj nyob rau hauv pem hauv ntej ncej thiab ib tug me me yob qhov sib txawv nyob rau hauv lub rear thav duab), nws yuav ua rau ib tug tam sim ntawd hloov nyob rau hauv cov hlau deformation thiab cov phab ntsa thickness tsis sib xws.
- Tsis tsim nyog elongation coefficient:
Lub elongation coefficient (qhov piv ntawm qhov ntev tom qab dov mus rau qhov ntev ua ntej dov) yog loj dhau los yog me me, los yog cov elongation coefficient yog unevenly faib ntawm txhua thav duab - yog hais tias lub elongation coefficient loj dhau lawm, cov hlau ntws sai heev, uas yog nquag mus rau hauv zos thinning. Kev faib tawm tsis sib xws yuav ua rau muaj qhov sib txawv ntawm qhov deformation ntawm txhua ntu, ua rau muaj kev hloov pauv ntawm phab ntsa thickness.
- Kev ceev tsis raug:
Kev pub mis ceev ntawm lub billet (piercing ceev), kev sib hloov ceev ntawm cov yob, thiab qhov ceev ntawm lub mandrel extraction tsis sib xws, ua rau cov hlau tsis txaus los yog tsub zuj zuj. Piv txwv li, yog tias qhov tho qhov nrawm nrawm dhau thiab qhov kev txhawb nqa mandrel tsis tuaj yeem raws sijhawm, cov phab ntsa sab hauv ntawm cov yeeb nkab steel yuav ua rau hauv zos thinner.
3. Ua tsis tiav ntawm lubrication / txias txheej txheem
Lub lubrication tsis txaus thaum lub sij hawm dov (xws li cov roj lubricating tsis txaus lossis cov roj tsis zoo) ua rau muaj kev sib txhuam ntau dhau ntawm cov hlau thiab cov yob los yog mandrel, uas ua rau muaj zog tiv thaiv hauv zos deformation thiab cov phab ntsa tuab.
Cov txheej txheem cua txias tsis sib xws (xws li thaiv cov dej txias, qhov sib txawv ntawm lub kaum sab xis), qhov cua txias hauv zos sai ntawm cov yeeb nkab steel nto, nce hardness, thiab tsis muaj peev xwm kho tau zoo hauv cov txheej txheem tom ntej, ua rau phab ntsa thickness sib txawv.
IV. Kev khiav hauj lwm yam tseem ceeb: Qhov "precision execution" tswj los ntawm tib neeg tsis nyob rau hauv qhov chaw
Cov kev txawj ntse ntawm cov neeg ua haujlwm, lub sijhawm ntawm kev tshuaj xyuas thiab kev hloov kho ncaj qha cuam tshuam rau kev ua tiav ntawm cov txheej txheem thiab yog "tib neeg ua rau" ntawm cov phab ntsa tsis sib xws.
1. yuam kev nyob rau hauv parameter hloov
Tus neeg teb xov tooj tsis tuaj yeem kho qhov tsis sib xws xws li qhov sib txawv ntawm qhov sib txawv, kev sib hloov ceev, thiab qhov kub thiab txias raws li qhov tshwj xeeb thiab cov khoom siv ntawm lub raj xa hluav taws xob (piv txwv li, siv cov khoom qub los tsim cov yeeb nkab steel ntawm cov khoom sib txawv), ua rau muaj qhov tsis sib haum xeeb ntawm cov khoom siv thiab cov khoom siv raw.
Thaum kho qhov sib txawv ntawm cov menyuam, nws tsis tau ntsuas (xws li tsuas yog kho raws li kev paub dhau los yam tsis siv cov cuab yeej zoo li lub ntsuas ntsuas rau kev ntsuas), uas ua rau muaj qhov sib txawv ntawm qhov sib txawv ntawm cov menyuam sib txawv thiab cov nqi teev.
2. Kev tshuaj xyuas thiab kev saib xyuas tsis raug raws sijhawm
- Cov kev hnav ntawm cov khoom xws li yob, mandrels, thiab cov neeg saib xyuas tsis tau tshuaj xyuas tsis tu ncua (piv txwv li, cov yob tsis tau hloov thaum hnav dhau tus qauv), lossis cov hlau adhesions thiab oxide nplai ntawm cov khoom tsis raug ntxuav hauv lub sijhawm, ua rau tsis sib xws.
- Tsis pom cov khoom sib txawv ntawm qhov sib txawv raws sij hawm (xws li thav duab offset, xoob cov lus qhia guards), los yog tsis ua hauj lwm kho raws sij hawm tom qab tshawb pom.
3. Kev xaiv cov khoom siv raw tsis nruj
Cov neeg ua haujlwm ua tsis tau raws li qhov tshwm sim thiab kev tshuaj xyuas qhov ntev ntawm lub raj xa hluav taws xob (xws li siv cov raj xa hluav taws xob nrog cov ellipticity ntau dhau), uas ua rau "qhov tsis xws luag" ntws mus rau hauv cov txheej txheem dov.
V. Tej yam tshwm sim ntawm qhov tsis sib xws ntawm phab ntsa Thickness Vim muaj cov txheej txheem dov sib txawv (cov lus xaus)
| Rolling txheej txheem: | Cov ntaub ntawv tsis sib xws ntawm phab ntsa thickness; |
Core ua |
| Kub- dov seamless steel raj ( tho + nruam dov) | Eccentric phab ntsa (thickness / thinness ntawm ib sab) | Cov cua kub tsis sib xws ntawm lub billet, eccentricity ntawm lub tshuab tho lub taub hau sab saum toj, kev ua haujlwm tsis zoo ntawm lub tshuab dov tsis tu ncua, tsis sib xws ntawm cov yob |
| Cov phab ntsa tsis sib xws nyob rau hauv cov duab kauv | Lub khob hliav qab tsis zoo Lub kaum sab xis ntawm lub tshuab xuas nrig ntaus cov menyuam, offset ntawm cov khoom siv tiv thaiv, thiab sib txawv ntawm cov yeeb nkab ntxhib | |
| Periodic fluctuations nyob rau hauv phab ntsa thickness | Cov kev sib hloov ceev ntawm txhua tus ncej ntawm lub nruam dov zeb tsis synchronized, yob qhov sib txawv chaw tsis tas li, thiab cov mandrels yog unevenly hnav. | |
| Txias- dov seamless steel yeeb nkab | Sab hauv offset phab ntsa (tsis sib xws ntawm phab ntsa sab hauv) | mandbar eccentricity, tsis zoo sib xws ntawm lub txias dov zeb yob, lubrication tsis txaus ua rau hlau adhesion |
| Local nyias dots/thick dots | Cov khoom tsis zoo hauv zos hauv cov khoom siv raw (cov raj tsis muaj), impurities adhering rau saum npoo ntawm cov yob, thiab cua txias tsis sib xws | |
| Qhov loj me / txo cov txheej txheem | Phab ntsa thickness ntawm qhov kawg yog tsis sib npaug | Qhov kub ntawm qhov kawg ntawm cov yeeb nkab khoob yog qhov tsawg dhau, qhov sib txawv ntawm cov menyuam ntawm lub tshuab sizing yog hloov tsis raug, thiab cov kev taw qhia sib txawv ntawm tus neeg saib xyuas. |
impurities adhering rau saum npoo ntawm cov yob, tsis sib xws txias
Sizing / txo cov txheej txheem: Cov phab ntsa tsis sib npaug ntawm qhov kawg, qhov kub thiab txias dhau ntawm qhov kawg ntawm cov yeeb nkab khoob, kev hloov tsis raug ntawm cov menyuam sib txawv ntawm lub tshuab sizing, sib txawv ntawm cov lus qhia thiab tus neeg saib xyuas
VI. Yuav txheeb xyuas thiab daws qhov tsis sib xws ntawm Phab Ntsa Thickness? (Cov lus qhia luv luv)
1. Kev txheeb xyuas thiab qhov chaw:
Siv lub ntsuas ntsuas ultrasonic thickness ntsuas raws qhov ncig ntawm cov yeeb nkab steel (tsawg kawg yog plaub txoj kev qhia) thiab qhov ntev kev taw qhia (txhua 100-200mm) los txiav txim seb daim ntawv tsis sib xws (eccentricity, helical, periodic).
2. Lub Hom Phiaj Kev Tshawb Fawb:
- Eccentric phab ntsa: Ua ntej kuaj xyuas cov cuab yeej kev sib raug zoo (cov menyuam-mandbar centerline), eccentricity ntawm sab saum toj / mandbar, thiab tsis sib xws cua sov ntawm lub raj billet.
- Cov duab tsis sib xws: Txheeb xyuas cov lus qhia ntawm lub tshuab xuas nrig ntaus, lub khob hliav qab ntawm cov yob, thiab qhov sib txawv ntawm cov yeeb nkab khoob.
- Kev hloov pauv raws sijhawm: Tshawb xyuas cov synchronization ntawm qhov nrawm nrawm nrawm, lub voj voog ntawm cov yob, thiab qhov chaw ntawm qhov sib txawv ntawm qhov yob.
3. Kev daws teeb meem:
- Cov ntaub ntawv raw:
Tshuaj ntsuam cov raj xa dej uas tsim nyog (nrog qhov loj me thiab qhov kub thiab txias), thiab tshem tawm cov khoom tsis zoo;
- Khoom siv:
Calibrate alignment thiab levelness, hloov cov khoom hnav (rolls, mandrels, guide guards), thiab ntxuav qhov chaw ntawm cov khoom;
- Txheej txheem:
Txhim kho qhov kub thiab txias (cov rwb thaiv tsev tsis zoo), kho qhov sib txawv ntawm cov menyuam sib txawv / nrawm, thiab txhim kho lubrication thiab txias;
- Kev ua haujlwm:
Txhim khu kev soj ntsuam (calibrate tsis thiab xyuas cov khoom raws li txoj cai rau txhua batch), thiab txhim khu kev txawj ntse ntawm cov tswv.
Los ntawm kev txheeb xyuas saum toj no, nws tuaj yeem pom tias qhov tsis sib xws ntawm phab ntsa tuab ntawm cov yeeb nkab steel yog qhov tshwm sim los ntawm kev sib koom ua haujlwm tsis ua haujlwm ntawm ntau qhov txuas xws li "raws li cov khoom siv - cov khoom siv - txheej txheem - kev ua haujlwm", thiab cov tub ntxhais nyob hauv kev puas tsuaj ntawm cov hlau deformation. Hauv kev tsim khoom, tag nrho - txheej txheem tswj los ntawm "qhov chaw (cov ntaub ntawv raw) - txheej txheem (cov khoom siv + thev naus laus zis) - kev ua tiav (kev ua haujlwm)" yog qhov tsim nyog los txo qhov tshwm sim ntawm cov phab ntsa tsis sib xws.
Cim npe nrov: Dab tsi ua rau cov phab ntsa tsis sib xws hauv cov yeeb nkab steel, Tuam Tshoj, lwm tus neeg, manufacturers, hoobkas, nqe
