Nrog rau txoj kev loj hlob sai ntawm high-ceev thiab hnyav railways, cov qauv khiav yog maj mam hloov los ntawm seamless kab los ntawm cov kab zoo tib yam. Piv nrog rau cov kab zoo tib yam, cov kab seamless tshem tawm ntau qhov kev sib txuas ntawm txoj kev tsheb ciav hlau hauv lub hoobkas, yog li nws muaj qhov zoo ntawm kev khiav haujlwm du, tsis tshua muaj nqi txij nkawm, thiab lub neej ua haujlwm ntev. Nws tau dhau los ua txoj hauv kev tseem ceeb ntawm kev kub ceev railway kab kev tsim kho tam sim no. Txoj kab seamless yog ib qho tseem ceeb tshiab technology ntawm railway khiav. Cov kab tsim los ntawm kev vuam zoo tib yam steel rails rau hauv txoj kab ntev ntawm ib qho ntev, vuam thiab tso cov hlua ntev nrog ib qho ntev yog hu ua kab seamless. Rail vuam yog ib feem tseem ceeb ntawm kev tso cov kab seamless.
Tam sim no, txoj kev vuam ntawm seamless kab rail pob qij txha feem ntau suav nrog kev sib txuas ntawm kev sib txuas, roj siab vuam thiab aluminothermic vuam:
01 Hu rau vuam txoj kev thiab txheej txheem
Rail contact welding (flash welding) feem ntau yog siv rau hauv lub Hoobkas vuam. 95% ntawm txoj kab seamless tiav los ntawm cov txheej txheem no, uas yog, tus qauv kev tsheb ciav hlau nrog qhov ntev ntawm 25 meters thiab tsis muaj qhov welded rau hauv txoj kab ntev ntawm 200-500 meters.
Lub hauv paus ntsiab lus yog siv hluav taws xob tam sim no los ua kom muaj cua sov los ntawm kev sib cuag ntawm lub tsheb ciav hlau kom yaj lub ntsej muag ib nrab ntawm txoj kev tsheb ciav hlau, thiab tom qab ntawd ua tiav qhov vuam los ntawm kev ntxhov siab. Txij li thaum vuam kub qhov chaw ntawm kev sib cuag welding los ntawm lub hauv paus kub ntawm lub workpiece, lub tshav kub yog concentrated, lub cua sov lub sij hawm yog luv luv, lub vuam txheej txheem tsis yuav tsum tau muab tub lim hlau, cov txheej txheem metallurgical yog yooj yim, lub tshav kub cuam tshuam cheeb tsam yog. me me, thiab nws yog ib qho yooj yim kom tau ib tug zoo zoo welded sib koom.
Cov txheej txheem welding tau txais los ntawm lub tuam txhab rail welding yog qhov zoo ib yam, suav nrog: kev sib tw tsheb ciav hlau, kev kuaj xyuas qhov tsis zoo, kho lub ntsej muag kawg ntawm txoj kev tsheb nqaj hlau, nkag mus rau qhov chaw nres tsheb yuav tsum tau welded, vuam, sib tsoo ntxhib, zoo sib tsoo, ncaj, normalizing, flaw. nrhiav kom tau, nkag mus rau hauv lub tsheb ciav hlau platform, txhim kho cov txheej txheem vuam yog qhov tseem ceeb tshaj plaws ntawm tag nrho cov txheej txheem. Qhov zoo ntawm cov vuam yog ncaj qha cuam tshuam nrog kev ua haujlwm ntawm kev kho kab. Yog tias muaj teeb meem, nws yuav ua rau muaj kev phom sij rau kev tsav tsheb hauv qhov xwm txheej hnyav. Piv nrog rau lwm txoj kev tsheb ciav hlau welding, Flash welding muaj qib siab ntawm automation thiab tsis tshua muaj kev cuam tshuam los ntawm tib neeg yam. Cov khoom siv vuam yog nruab nrog lub computer tswj, nrog me me hloov ntawm vuam zoo thiab siab vuam tsim tau. Raws li ib txwm muaj, piv nrog cov roj siab vuam thiab thermite vuam, lub zog ntawm kev sib cuag vuam seam ntawm txoj kev tsheb nqaj hlau yog siab dua, thiab qhov tawg ntawm txoj kab yog li 0.5/10000 lossis tsawg dua. Txawm li cas los xij, piv nrog cov khoom siv hauv paus, nws lub zog tseem qis dua li ntawm cov khoom siv hauv paus rau cov laj thawj hauv qab no:
(1) Lub tsheb ciav hlau yog cov khoom siv loj-section bar, thiab nws cov khoom tseem ceeb tsis zoo, nrog cov ntsiab lus melting tsawg, xoob, thiab coarse nplej. Thaum lub sij hawm vuam thiab kev ntxhov siab, cov khoom siv ntug yog extruded, thiab cov khoom tseem ceeb yog hloov los ntawm kev nthuav dav sab nraud, thiab cov ntaub so ntswg yog cuam tshuam thiab khoov, thiab qhov ntau dua qhov kev ntxhov siab, qhov pom tseeb qhov teeb meem no.
(2) Vim lub thermal cuam tshuam ntawm vuam kub, cov nplej yog ntxhib nyob rau hauv 1-2 hli cheeb tsam nyob ib ncig ntawm lub weld, thiab cov nplej raug txo mus rau 1-2 qib.
(3) Txoj kab hla ntawm txoj kev tsheb ciav hlau tsis sib npaug, sab saum toj thiab hauv qab ntawm txoj kev tsheb ciav hlau yog cov ntu me me, thiab ob lub ces kaum ntawm lub hauv qab ntawm txoj kev tsheb ciav hlau tau nthuav dav. Qhov kub ntawm ob lub ces kaum ntawm lub hauv qab ntawm lub tsheb ciav hlau yog tsawg thaum lub sij hawm vuam. kub ntxhov siab
(4) Muaj qhov tsis xws luag uas nyuaj rau kev tshem tawm ntawm qhov vuam - grey me ntsis.
02 Gas pressure welding welding txoj kev thiab txheej txheem
Tam sim no, siv dav siv roj siab vuam ntawm cov ntsia hlau yog lub tshuab me me ntawm lub tshuab hluav taws xob siab vuam, uas yog siv rau kev sib koom ua ke ntawm cov hlua ntev ntawm qhov chaw, thiab tseem tuaj yeem siv lub teeb ci kaw rau vuam ntawm kev puas tsuaj.
Lub hauv paus ntsiab lus yog kom sov lub welded kawg lub ntsej muag ntawm txoj kev tsheb ciav hlau mus rau ib lub xeev yas, thiab tsim ib qho kev ntxhov siab nyob rau hauv qhov kev txiav txim ntawm ib tug ruaj upsetting quab yuam. Thaum qhov kev ntxhov siab nce mus txog ib qho nyiaj, lub tsheb ciav hlau yog welded rau hauv tag nrho.
Tam sim no me me cua siab vuam tshuab yog qhov tseem ceeb hauv tsev welding, thiab cov txheej txheem vuam feem ntau muab faib ua theem xws li oxy-acetylene nplaim preheating, pre-pressurization, low-pressure upsetting, high-pressure upsetting, thiab siab tuav thiab thawb. Nws yog ib qho tsim nyog yuav tsum tau ua raws li cov lus qhia thiab saib xyuas cov cua sov nrog lub qhov muag liab qab, yog li nws muaj kev cuam tshuam zoo heev los ntawm tib neeg cov yam ntxwv, thiab nws muaj feem cuam tshuam rau kev sib koom ua ke tsis raug thiab kev sib koom ua ke.
Tab sis vim nws muaj cov yam ntxwv ntawm cov cuab yeej siv yooj yim, me me thiab lub teeb yuag, nws yooj yim txav hauv online, offline thiab ntawm qhov chaw tsim kho, thiab kev ua haujlwm yog qhov yooj yim, yog li nws yog dav siv rau vuam ntev ntev ntawm qhov chaw tsim kho. .
03 Thermite welding txoj kev thiab txheej txheem
Thermite welding feem ntau yog siv rau hauv qhov chaw vuam ntawm txoj kev tsheb ciav hlau, thiab yog ib txoj hauv kev tseem ceeb rau txoj kab nteg, tshwj xeeb tshaj yog rau seamless kab locking thiab kho cov kab tawg. Lub aluminothermic vuam ntawm cov ntsia hlau yog raws li cov tshuaj muaj zog affinity ntawm txhuas nyob rau hauv lub flux thiab oxygen nyob rau hauv kub kub. Nws txo cov hlau hnyav thiab tso cua sov tib lub sijhawm, yaj cov hlau rau hauv cov hlau molten rau casting thiab vuam.
Cov txheej txheem tseem ceeb yog muab cov txheej txheem thermite npaj rau hauv ib qho tshwj xeeb crucible, ignite cov flux nrog high-temperature match, tsim ib tug muaj zog tshuaj tiv thaiv, thiab tau high-temperature molten steel thiab slag. Tom qab cov tshuaj tiv thaiv calms down, ncuav lub kub kub molten hlau mus rau hauv lub Fasten lub ntsia hlau preheated xuab zeb pwm, yaj lub kawg ntawm lub pob tw ntsia hlau rau hauv cov xuab zeb pwm, tshem tawm cov xuab zeb pwm tom qab txias, thiab reshape lub welded pob qij txha nyob rau hauv lub sij hawm. , thiab ob seem ntawm cov ntsia hlau yog welded rau hauv ib qho. Txawm hais tias cov khoom siv aluminothermic welding muaj cov yam ntxwv ntawm kev nqis peev tsawg, kev siv vuam yooj yim, thiab kev sib koom ua ke zoo, lub vuam seam yog cov qauv tuab tuab nrog cov tsis zoo toughness thiab plasticity. Nws yog qhov zoo tshaj plaws los ua kev kho cua sov tom qab vuam los txhim kho kev ua haujlwm ntawm kev sib koom ua ke. .
Nyob rau hauv luv luv, lub vuam zoo ntawm txoj hlua ntev yuav tsum zoo dua nrog kev sib cuag vuam thiab roj siab vuam. Qhov kawg ntawm lub zog, lub zog tawm los thiab qaug zog ntawm kev sib cuag vuam thiab roj siab vuam tuaj yeem ncav cuag ntau dua 90% ntawm lub hauv paus hlau. Qhov zoo ntawm aluminothermic welding yog me ntsis zuj zus, nws qhov kawg lub zog tsuas yog kwv yees li 70% ntawm lub hauv paus hlau, lub zog qaug zog yog qhov phem dua, tsuas yog ncav cuag 45% mus rau 70% ntawm lub hauv paus hlau, thiab lub zog tawm los yog me ntsis zoo dua, uas. yog nyob ze ntawm kev sib cuag welding.
Post lub sij hawm: Mar-01-2023
