Ib tug phooj ywg tau qhia ob peb daim duab hauv kev sib tham hauv pab pawg, thiab thaum saib luv luv, nws zoo li yog qhov tsis zoo ntawm huab cua. Vim li cas thiaj li muaj qhov tsis xws luag? Los ntawm cov duab muab los ntawm tus neeg nug, kuv tuaj yeem pom qhov tsis muaj teeb meem ntawm qhov teeb meem. Kuv ntseeg tias nrog cov txheej txheem tsim qauv no, huab cua void tsis xws luag yuav ib txwm nrog nws.
Hauv qab no yog ob peb daim duab muab los ntawm nws, raws li pom hauv daim duab 1, Daim duab 2, thiab daim duab 3.
Vim li cas peb thiaj li xaus li no? Nws yog vim hais tias lub sab saum toj-gated pouring system yog nquag mus turbulent txaus thaum lub sij hawm casting, uas yooj yim ua rau huab cua entrapment. Cia li xav txog tej yam, thaum lub molten hlau pours los ntawm sab saum toj ntawm lub casting yog hais tias lub puab rooj vag thiab riser yog ob leeg thaiv, qhov twg cov huab cua nyob rau hauv lub pwm kab noj hniav yuav dim? Tau kawg, yog tias cov pwm muaj qhov zoo permeability, tej zaum yuav muaj qee qhov kev khiav tawm ntawm cov roj. Tab sis yuav ua li cas yog tias pwm tsis zoo permeability?
Tam sim no cia peb rov qab mus rau daim duab 1 thiab ua tib zoo saib. Tshawb xyuas thaj tsam flange hauv qab ntawm lub plhaub pwm kom zoo. Koj puas xav tias pwm muaj permeability zoo? Tag nrho saum npoo ntawm lub flange yog them nrog hmoov. Koj puas xav tias pwm tseem muaj permeability?
Peb feem ntau hais txog tias txawm tias nws yog lub plhaub pwm tsis tu ncua lossis cov txheej txheej, cov pwm yuav tsum tau hloov mus tas li kom ntseeg tau tias muaj qhov sib xws thiab txawm tias phab ntsa tuab. Tshwj xeeb tshaj yog rau txheej txheej, nws yuav tsum tau thov tusyees yam tsis muaj cov khoom tsub zuj zuj. Ua tib zoo saib daim duab 1, sab saum toj ntawm lub tshuab khiav, lub flange nto yog tag nrho ntawm cov khoom tsim. Yuav ua li cas lub plhaub no ua tau zoo castings?
Peb txhua tus nkag siab tias lub plhaub zoo li no tsis muaj cua sov dissipation thiab tiv taus kom ua tiav burnout. Cia li xav txog,
Tus tsim ntawm lub sab saum toj-gated pouring system yog npaj rau tuab thiab loj Cheebtsam, hais txog nws haum rau compensating shrinkage. Qhov teeb meem tseem ceeb yog tias tib neeg yuav saib tsis taus qhov tseeb tias kev tsim cov txheej txheem sab saum toj-gated pouring tiag tiag xav tau kev xav tau siab ntawm ob lub pourers thiab lub plhaub tawg. Nws yuav tsum tau ib tug kom muaj ib tug du thiab ceev pouring txheej txheem, thaum lwm yam xav tau kom lub shortest nrug ntawm lub ingate thiab lub ladle, nrog rau tag nrho cov ingate tsis tag nrho. Qhov no yog qhov tseeb tshwj xeeb rau kev tsim cov txheej txheem saum toj kawg nkaus uas tau pom hauv daim duab 2.
Yog li ntawd, yog tias koj xav siv cov txheej txheem top-gated, nws yog ib qho tseem ceeb kom sib txuas lus zoo nrog tus neeg teb xov tooj cua sov thiab lub plhaub tawg ua ntej casting. Kev sib koom tes zoo thaum lub sij hawm nchuav tuaj yeem txhim kho kev ua tau zoo ntawm koj tus qauv tsim, thaum kev sib koom ua haujlwm tsis zoo tuaj yeem ua rau muaj txiaj ntsig zoo ntawm cov txheej txheem pouring zoo.
Hauv kev muaj tiag, kev saib xyuas kom meej yog qhov tseem ceeb tshaj plaws ntawm kev nqis peev casting, raws li peb txhua tus paub tias kev ua tiav lossis tsis ua tiav nyob rau hauv cov ntsiab lus. Txawm li cas los xij, thaum nws los saib xyuas cov ntsiab lus tsim nyog, peb nyiam tsis nco qab txog lawv. Qhov no tej zaum yuav yog qhov chaw uas peb cov peev casting tswj tsis tau tshaj plaws.
Los ntawm kev tsim cov khoom no cov txheej txheem pouring, peb tuaj yeem kawm tau ib zaj lus qhia tseem ceeb: txawm li cas los xij koj tsim koj cov txheej txheem top-gated, koj yuav tsum ua tib zoo xav txog qhov venting ntawm koj lub plhaub pwm. Qhov no yog tshwj xeeb tshaj yog ib qho tseem ceeb nyob rau hauv sab saum toj-gated pouring system tsim.
