Lub unevenness ntawm phab ntsa thickness ntawm steel kav yuav muab faib ua lateral phab ntsa thickness unevenness (qhov txawv ntawm qhov siab tshaj plaws thiab yam tsawg kawg nkaus phab ntsa thickness nyob rau hauv tib tug ntoo khaub lig-section) thiab longitudinal phab ntsa thickness unevenness (qhov txawv ntawm phab ntsa thickness raws li qhov ntev ntawm cov yeeb nkab). Nws yog ib qho ntawm feem ntau qhov tseeb qhov tsis xws luag hauv steel yeeb nkab ntau lawm. Nws ua rau muaj kev cuam tshuam rau cov txheej txheem ntau lawm. Cov laj thawj tseem ceeb sib txawv ntawm cov kav dej seamless thiab welded kav. Tib lub sijhawm, nws raug cuam tshuam los ntawm ntau yam xws li cov khoom siv raw, khoom siv, thiab kev ua haujlwm.
I. Cov laj thawj tseem ceeb rau cov phab ntsa tsis sib xws
1. Inherent deviations ntawm raw khoom
- Seamless steel yeeb nkab: Txoj kab uas hla ntawm cov yeeb nkab billet yog loj, lub roundness tsis zoo, muaj lub hauv paus porosity / qhov cub shrinkage los yog muaj pes tsawg leeg segregation, uas ncaj qha ua rau eccentricity nyob rau hauv lub phab ntsa thickness tom qab tho; yog tias qhov cua sov ntawm pipe billet yog qhov tsis sib xws (nrog qhov kub thiab txias sib txawv ntawm cov phab ntsa sab hauv thiab sab nrauv, thiab lub taub hau thiab tus Tsov tus tw), qhov deformation kuj tsis sib haum, thiab tom qab qhov tho deformation, phab ntsa thickness sib txawv yuav ua kom nrov ntxiv.
- Welded steel kav:Lub thickness kam rau ua ntawm steel sawb / steel phaj yog ntau dhau. Muaj "ntug thinning" (cov ntug tuab yog tsawg dua qhov nruab nrab) nyob rau hauv tib lub steel sawb yob, los yog cov thickness fluctuation ntawm lub taub hau thiab tus Tsov tus tw ntawm steel sawb, uas ncaj qha converts mus rau hauv longitudinal thiab transverse phab ntsa thickness inhomogeneity ntawm lub cev yeeb nkab; Thaum cov hlau sawb muaj crescent khoov, qhov hloov pauv ntawm lub kaum sab xis kuj tseem yuav ua rau phab ntsa thickness sib txawv.
2. Cov txheej txheem sib txawv hauv cov txheej txheem tsim / dov
- Seamless yeeb nkab - tho txheej txheem: Qhov no yog lub hauv paus tseem ceeb ntawm cov phab ntsa tsis sib npaug ntawm cov yeeb nkab. Hnav thiab eccentricity ntawm lub tshuab tho lub taub hau, khoov ntawm lub laub pas nrig, qhov tsis raug qhov chaw ntawm cov yeeb nkab billet, asymmetry nyob rau hauv lub inclination lub kaum sab xis ntawm cov yob, thiab tsis tsim nyog qhov chaw ntawm lub laub pas nrig extension tus nqi, tag nrho cov yuav ua rau "deviation ntawm qhov chaw" thaum lub sij hawm tho cov yeeb nkab raw, uas ua rau tag nrho cov phab ntsa thickness.
- Seamless yeeb nkab - nruam dov thiab sizing txo cov txheej txheem: Kev hloov kho ntawm qhov sib txawv ntawm qhov sib txawv ntawm lub tshuab dov tsis tu ncua, kev hnav tsis sib haum ntawm qhov tuag, tsis ruaj khov rolling nro (rub steel / stacking steel), tuaj yeem ua rau qhov sib txawv ntawm cov phab ntsa tuab ntawm cov yeeb nkab ntev; Kev txo qis ntau dhau ntawm lub tshuab sizing txo, kev sib txuam tsis zoo, tsis tsuas yog nws yuav ua kom cov phab ntsa thickness sib txawv, tab sis kuj yuav ua rau cov tuab tuab ntawm cov yeeb nkab kawg phab ntsa tuab (nrog rau qhov kawg phab ntsa thickness ntau dua qhov nruab nrab ntawm cov yeeb nkab lub cev).
- Txias- kos steel yeeb nkab: Hnav thiab kev puas tsuaj ntawm cov pwm sab nrauv thiab lub taub hau tub ntxhais, qhov tsis txaus qhov chaw raug, tsis ruaj khov nrawm nrawm, lubrication tsis sib xws, tuaj yeem ua rau qhov tsis sib xws ntawm phab ntsa thickness txo tus nqi, uas ua rau qhov ntev ntawm phab ntsa thickness deviations.
- Welded yeeb nkab - txheej txheem tsim thiab sizing: Kev hloov siab tsis sib haum ntawm cov ntawv yob, qhov tsis sib xws bending deformation tus nqi ntawm cov npoo, tuaj yeem ua rau deformation sib txawv ntawm phab ntsa thickness ntawm ob sab tom qab vuam; Kev tsis sib haum xeeb ntawm qhov tuag nyob rau hauv lub tshuab sizing yuav ntxiv exacerbate lub lateral phab ntsa thickness sib txawv; Kev tswj tsis tsim nyog ntawm tus nqi extrusion nyob rau hauv cheeb tsam weld kuj tuaj yeem ua rau cov phab ntsa thickness txawv txav.
3. Tsis txaus qhov tseeb ntawm cov cuab yeej thiab cov cuab yeej
- Kev ua tiav ntawm cov yob yob thiab tuag profiles tsis ua raws li cov qauv.Tom qab lub sijhawm ntev- ntau lawm, lawv yuav muaj kev hnav tsis sib xws lossis hauv zos tawg, uas tsis tuaj yeem ua kom ruaj khov qhov ntev.
- Kev sib raug zoo ntawm cov khoom siv qhia, mandrels / headers tsis zoo.Los yog cov mandrels yuav khoov los yog hnav tsis sib xws, ua rau cov yeeb nkab steel deviate thaum dov thiab ua rau asymmetric quab yuam deformation.
- Lub rigidity ntawm cov khoom tseem ceeb yog tsis txaus. Thaum lub sij hawm dov ntawm loj- qhov loj tuab- cov kav dej uas muaj phab ntsa, tus nqi bounces hloov pauv tau zoo heev, thiab tus nqi tiag tiag ntawm tus nqi txo qis deviates ntau ntawm cov nqi teev.
4. Kev ua haujlwm tsis txaus thiab kev tswj cov txheej txheem
- Tom qab hloov cov kev qhia tshwj xeeb, hloov cov yob / hloov nozzles, tsis txaus debugging tau ua. Thawj batch ntawm cov kav hlau steel tau tsim tsis muaj qhov tseeb ntawm phab ntsa tuab.
- Qhov ntsuas kub ntawm qhov cub hluav taws xob tsis sib xws, thiab cov cua kub sib txawv tsis tsim nyog. Qhov kub ntawm qhov sib txawv ntawm cov yeeb nkab billets tshaj qhov tso cai ntawm cov txheej txheem.
II. Kev ceev faj thaum tsim khoom thiab siv
1. Cov ntsiab lus tseem ceeb rau kev tswj xyuas ntau lawm
- nruj me ntsis tswj kev nkag ntawm cov ntaub ntawv raw:Ua cov qauv tshuaj ntsuam xyuas ntawm txoj kab uas hla, roundness, nto zoo ntawm cov billets, nrog rau cov thickness kam rau ua thiab ntug thickness sib txawv ntawm cov hlau strips. Cov khoom tsis tsim nyog yuav tsum tsis txhob muab tso rau hauv kev tsim khoom; xyuas kom qhov tseeb qhov chaw nruab nrab ua ntej billet tho.
- Tsis tu ncua calibration thiab hloov cov cuab yeej:Tsim kom muaj cov qauv kuaj pom kev rau yob, taub hau, cores, thiab tuag. Hloov lawv tam sim yog tias lawv tshaj qhov txwv; Tom qab txhua lub cuab yeej hloov pauv lossis kev hloov pauv tshwj xeeb, ua qhov hloov kho qhov nruab nrab thiab ua ntej - daim phab ntsa thickness ntsuas, thiab tsuas yog ua nrog cov khoom tsim tawm yog tias tsim nyog.
- Optimize lub stability ntawm cov txheej txheem tsis: Tswj qhov sib xws ntawm billet cua sov, txo qhov kub ntawm qhov sib txawv ntawm lub taub hau thiab tus Tsov tus tw thiab sab hauv thiab sab nraud; precisely phim lub dov ceev, nro, thiab txo tus nqi kom tsis txhob muaj kev hloov pauv loj; rau qhov teeb meem ntawm tus Tsov tus tw thickening nyob rau hauv tas li txo lub taub hau, lub nro system thiab kawg thinning nyiaj them txheej txheem yuav optimized los txhim kho qhov teeb meem.
- Configure online nrhiav loops: Txhim kho ultrasonic lossis radiographic online thickness ntsuas tshuab los saib xyuas lub lateral thiab longitudinal phab ntsa thickness deviations nyob rau hauv lub sij hawm, thiab kho cov dov tsis nyob rau hauv ib tug kev sib koom tes kom sai deviations.
2. Kev ceev faj rau kev txais khoom
- nruj me ntsis xyuasQhov tso cai sib txawv ntawm phab ntsa tuab raws li cov qauv siv tau (xws li GB / T 8163, API 5L, ASTM A106, DIN 2448, thiab lwm yam): Kev kam rau cov phab ntsa tuab hauv cov kav dej ua ke feem ntau yog ± 10% rau ± 12.5%, thaum siab {{7}%, nws tuaj yeem ncav cuag ± 8%.
- Kev tshuaj xyuas yuav tsum npog cov haujlwm tseem ceeb xws li qhov nruab nrab ntawm cov yeeb nkab lub cev, ob qho kawg, thiab cov hlua khi (welded kav), tsis tsuas yog ntsuas qhov -taw tes phab ntsa tuab, tab sis kuj tseem ntsuas qhov siab tshaj plaws / tsawg phab ntsa thickness ntawm tib seem thiab xam cov phab ntsa thickness unevenness.
- Rau cov kav hlau steel nrog qhov tseem ceeb ntawm phab ntsa thickness sib txawv, kev txheeb xyuas ntxiv ntawm roundness yuav tsum tsis txhob txiav txim siab ntawm phab ntsa thickness vim "compression deformation".
- Tsis muaj nyob rau ntawm - kab phab ntsa thickness xyuas txoj kev.Thaum lub sijhawm tsim khoom, cov ntsuas tsis tuaj yeem hloov kho raws sijhawm, thiab kev sib txawv txuas ntxiv mus.
3. Tshaj tawm -kev ua haujlwm thiab kev siv ceev faj
- Ua ntej ua cov txheej txheem thib ob xws li threading, dabtsi yog khoov, flaring, thiab kos duab txias, nws yog ib qho tsim nyog yuav tau kuaj xyuas cov phab ntsa thickness sib txawv. Thaum ua cov kav hlau tsis sib npaug hnyav, cov teeb meem xws li tawg, tsis tsim nyog xov profile, thiab cov thinning ntau dhau ntawm sab nraud ntawm cov yeeb nkab khoov yuav tshwm sim.
- Rau siab -cov kav xa dej thiab cov khoom siv thauj khoom- cov xwm txheej ntawm cov kabmob, yuav tsum tau them nyiaj tshwj xeeb: Cov phab ntsa tuab tsis sib xws tuaj yeem ua rau muaj kev ntxhov siab, txo qhov siab tag nrho- cov kabmob muaj peev xwm thiab kev nyab xeeb ntawm cov qauv. Nyob rau hauv siab - siab thiab corrosive tej yam kev mob, qhov kev pheej hmoo ntawm kev ua tsis tiav hauv zos yuav raug exacerbated.
- Thaum lub sij hawm cia thiab kev thauj mus los, tsis txhob hnyav cov khoom squeezing los yog khob, thiab tiv thaiv lub zos deformation ntawm cov yeeb nkab kawg uas ua rau kev ntsuas deviation ntawm phab ntsa thickness.
