Seamless Steel Pipe Production Method

(1) Tsis siv neeg cov yeeb nkab dov ntau lawm
Ib txoj hauv kev los tsim cov kav dej seamless steel. Cov khoom siv ntau lawm muaj cov tshuab xuas nrig ntaus, tsis siv neeg cov yeeb nkab dov cav tov, tshuab leveling, tshuab sizing thiab txo cov cav tov.
(2) Nruam dov yeeb nkab ntau lawm
Cov khoom siv ntau lawm muaj lub tshuab xuas nrig ntaus, txuas txuas txuas yeeb nkab dov tshuab thiab nro txo ​​tshuab. Lub round billet yog xuas nrig ntaus rau hauv lub raj capillary thiab muab tso rau hauv ib lub mandrel, thiab tom qab ntawd dov tsis tu ncua los ntawm ob lub yob zeb nrog 7 mus rau 9 yob axes teem ntawm 90 degree rau ib leeg. Tom qab dov, cov tub ntxhais-rub cov pas nrig yog rov ua kom sov thiab txo qis, thiab tuaj yeem dov rau hauv cov kav hlau mus txog 165m. Cov zis txhua xyoo ntawm 140mm txuas txuas txuas txuas txuas yog 400, 000 txog 600,{11}} tons, uas yog 2 mus rau 4 npaug ntawm cov yeeb nkab tsis siv neeg dov. Cov yam ntxwv ntawm chav tsev no yog qhov tsim nyog rau kev tsim cov kav hlau steel nrog ib txoj kab uas hla sab nraud tsawg dua 168mm. Nws xav tau cov cuab yeej siv loj loj, lub peev xwm loj, lub mandrel ntev txog 30m, thiab kev ua haujlwm nyuaj thiab kev tsim khoom.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3) Periodic dov yeeb nkab ntau lawm
Polygonal thiab round steel ingots lossis nruam casting billets yog siv los ua raw khoom. Tom qab cua sov, lawv yog perforated los ntawm dej siab los ua khob-zoo li tus blanks, uas yog ces dov mus rau hauv cov hlab ntsha ntxhib los ntawm ob-rolling cross-rolling elongation tshuab. Tom qab ntawd, lawv tau dov rau ntawm lub voj voog cov yeeb nkab dov tshuab nrog qhov sib txawv ntawm txoj kab uas hla qhov qhov. Cov menyuam tig ib zaug kom yob tawm ib ntu ntawm cov yeeb nkab steel. Lub voj voog yeeb nkab dov tshuab tseem hu ua Pilger yeeb nkab dov tshuab. Cycle dov yeeb nkab ntau lawm siv steel ingots li raw cov ntaub ntawv thiab yog tsim rau dov loj-inch tuab-walled steel kav thiab kuj sib txawv-section kav.
(4) Peb-yob yeeb nkab ntau lawm
Feem ntau yog siv los tsim cov phab ntsa tuab tuab nrog qhov tseeb qhov tseeb. Phab ntsa tuab qhov tseeb ntawm cov kav dej uas tsim los ntawm txoj kev no nce mus txog ± 5%, uas yog kwv yees li ob zaug raws li cov kav dej tsim los ntawm lwm txoj kev. Nyob rau xyoo 1960, vim yog qhov kev tsim tshiab ntawm peb-cov menyuam ntoo khaub lig-rolling zeb (hu ua Transval zeb), txoj kev no tau tsim sai heev. Cov yam ntxwv ntawm cov tshiab dov zeb yog tias thaum dov mus rau tus Tsov tus tw, qhov nkag teb ncej yog nrawm tig los hloov lub dov lub kaum sab xis, yog li tiv thaiv kev tsim ntawm daim duab peb sab ntawm tus Tsov tus tw, thiab nthuav qhov sib piv ntawm sab nraud ntawm phab ntsa. thickness ntawm ntau lawm ntau yam los ntawm 12 mus rau 35, uas tsis tau tsuas yog tsim nyias-walled hlab, thiab kuj muaj peev xwm ntau lawm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(5) Pipe jacking ntau lawm
Cov txheej txheem ib txwm siv yog txhawm rau txuas lub pob zeb rau hauv lub khob zoo li lub raj capillary los ntawm hydraulic perforation thiab cross-rolling. Lub mandrel ntev yog muab tso rau hauv qab ntawm lub khob capillary los ntawm lub laub pas nrig, thiab tom qab ntawd dhau los ntawm cov txheej txheem ntawm cov menyuam pwm thav ntawv nrog maj mam txo qhov, thiab dov mus rau hauv lub raj. . Txoj kev tsim khoom no muaj cov cuab yeej siv qis thiab tuaj yeem siv rau kev nruam casting billets. Nws tuaj yeem tsim cov kav dej loj thiab tuab ntxiv nrog txoj kab uas hla mus txog 1070mm thiab phab ntsa thicknesses txog 200mm. Txawm li cas los xij, kev ua haujlwm ntau lawm yog tsawg, phab ntsa thickness kuj yog tuab, thiab cov yeeb nkab ntev yog luv luv piv rau qhov ua tau zoo. Tom qab qhov tshwm sim ntawm cov txheej txheem tshiab ntawm CPE txoj kev, cov yeeb nkab khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Txoj kev no overcomes ib co shortcomings ntawm cov tsoos txoj kev thiab tau dhau los ua ib txoj kev nrog zoo nyiaj txiag kev pab nyob rau hauv zus tau tej cov seamless kav.
(6) Extruded raj ntau lawm
Ua ntej, lub peeled round billet yog perforated los yog nthuav, thiab ces rhuab los ntawm induction cua sov los yog ntsev da dej, thiab lub puab nto yog coated nrog lubricant thiab xa mus rau lub extruder. Cov hlau yog extruded rau hauv cov yeeb nkab los ntawm qhov sib txawv ntawm lub qhov tuag thiab lub mandrel. . Nws yog tsuas yog siv los tsim cov yeeb nkab uas tsis muaj plasticity high-temperature alloy kav, tshwj xeeb zoo li cov kav dej, cov kav dej sib txuas, cov kav hlau tsis muaj hlau, thiab lwm yam. Nyob rau hauv xyoo tas los no, extruded raj ntau lawm kuj tau tsim los ntawm kev txhim kho cov khoom pwm, lubricants, extrusion speeds, thiab lwm yam.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(7) Qhia phaj dov yeeb nkab ntau lawm
Kuj tseem hu ua Diessel method. Tom qab perforation, lub capillary raj nrog ib tug ntev mandrel yog dov mus rau hauv ib tug nyias-walled raj ntawm ib daim ntawv qhia phaj dov tshuab. Rolling mills zoo ib yam li ob-yob ntoo khaub lig-dov thom khwm, tshwj tsis yog tias daim ntawv qhia kev ruaj khov hloov mus rau lub phaj qhia. Vim hais tias nws yog tsim nrog ib tug ntev mandrel, lub puab phab ntsa ntawm cov yeeb nkab yog du thiab tsis muaj khawb; Txawm li cas los xij, tus nqi cuab yeej yog siab thiab kev hloov kho nyuaj. Nws yog tsuas yog siv los tsim cov hom phiaj dav dav carbon steel kav nrog ib txoj kab uas hla ntawm tsawg dua 150mm. Tam sim no nws tsis tshua siv thiab tsis muaj kev cia siab rau kev loj hlob zoo.
(8) Spinning tube ntau lawm
Lub phaj tiaj tus los yog hollow blank yog ua tiav rau hauv cov yeeb nkab nyias nyias los ntawm ib los yog ntau dua spinning ntawm lub tshuab spinning. Cov raj muaj qhov siab precision, zoo mechanical zog thiab ntau qhov ntau thiab tsawg, tab sis cov khoom siv tau tsawg. Feem ntau yog siv rau kev tsim cov kav hlau tsis muaj hlau, tab sis nce ntxiv siv rau kev tsim cov kav hlau. Ntxiv nrog rau kev siv hauv kev tsim cov khoom siv hauv tsev, cov thawv ntim tshuaj thiab cov tshuab tshuab, cov kav dej spinning feem ntau yog siv hauv kev lag luam tub rog.
(9) Cold dov thiab txias drawn tube ntau lawm
Siv los tsim cov kab me me nyias-walled, precision thiab tshwj xeeb zoo li cov kav dej. Kev tsim khoom yog tus cwj pwm los ntawm ntau lub voj voog txheej txheem. Txias dov siv lub caij txias dov yeeb nkab tshuab tuaj yeem ua tiav qhov elongation ntawm 6 mus rau 8. Nyob rau xyoo 1960, nws pib tsim cov kev taw qhia ntawm kev kub ceev, ntau kab, kab mob stroke ntev, thiab lub raj ntev blanks. Tsis tas li ntawd, cov tshuab me me-cov menyuam txias-dov yeeb nkab tshuab kuj tau tsim. Nws yog tsuas yog siv los tsim ultra-nyias precision kav nrog phab ntsa thickness tsawg dua 1 hli. Cov khoom siv txias dov yog qhov nyuaj, cov cuab yeej ua haujlwm yog qhov nyuaj, thiab kev hloov ntawm ntau yam thiab cov lus qhia tshwj xeeb yog hloov tsis tau. Kev sib xyaw ua ke ntawm cov dov txias thiab cov duab txias yog feem ntau yog siv, uas yog, cov phab ntsa raug txo los ntawm txias dov ua ntej kom tau txais qhov loj deformation. , thiab tom qab ntawd txias kos kom tau txais ntau yam kev qhia tshwj xeeb.