Shrinkage porosity ntawm tuag castings yog tshwm sim los ntawm ib tug nkaus xwb, uas yog vim hais tias cov hlau melts tom qab sau, los ntawm cov kua theem mus rau cov khoom theem ntawm lub inevitable theem hloov contraction. Tuag Casting Parts Vim hais tias cov yam ntxwv solidification ntawm cov tuag casting yog txias los ntawm sab nraud, thaum lub phab ntsa thickness ntawm lub casting yog loj, qhov teeb meem ntawm shrinkage porosity yuav tsum tau tsim nyob rau hauv.
Yog li ntawd, nyob rau hauv cov nqe lus ntawm tuag castings, tshwj xeeb tshaj yog cov tuab tuag castings, lub hav zoov ntawm shrinkage porosity yog inevitable, yog tsis yuav tsum tau daws.
Tuag casting shrinkage porosity teeb meem, tsis tuaj yeem daws tau tag nrho los ntawm cov txheej txheem casting nws tus kheej, los daws qhov teeb meem no kom huv si, tuaj yeem mus dhau ntawm cov txheej txheem, lossis nrhiav kev daws teeb meem los ntawm sab nraud. Txoj kev no yog dab tsi?
Raws li lub hauv paus ntsiab lus ntawm kev siv tshuab, kev daws rau shrinkage shrinkage ntawm castings tsuas yog ua tau raws li kev siv tshuab ntawm shrinkage. Tuag Casting Parts Cov theem kev hloov pauv ntawm cov txheej txheem casting solidification yog ib qho tshwm sim ntawm lub cev, peb tsis tuaj yeem tawm tsam txoj cai ntawm qhov xwm txheej no, tab sis tsuas yog ua raws li nws txoj cai thiab daws qhov teeb meem no. Muaj ob txoj hauv kev los ua cov castings, ib qho yog ntuj shrinkage, lwm yam yog yuam shrinkage. Txhawm rau kom ua tiav ntuj shrinkage, peb yuav tsum muaj cov txheej txheem ntawm "sequential solidification" hauv cov txheej txheem casting. Ntau tus neeg intuitively xav tias txoj kev tsis tshua muaj siab casting tuaj yeem daws qhov tsis xws luag ntawm cov castings, tab sis qhov ntawd tsis yog li ntawd. Kev siv cov txheej txheem tsis tshua muaj siab casting, Tuag Casting Parts tsis tau txhais hais tias qhov shrinkage ntawm castings yuav daws tau, yog hais tias cov txheej txheem uas tsis tshua muaj siab casting txheej txheem tsis muaj ib tug shrinkage ntawm tus txheej txheem, ces, no low-pressure casting txoj kev uas ua los ntawm cov dawb paug, kuj yuav 100% shrinkage porosity defects.
Vim yog cov yam ntxwv ntawm cov txheej txheem tuag casting nws tus kheej, nws yog ib qho nyuaj thiab nyuaj los teeb tsa lub ntuj "sequential solidification" txheej txheem. Tuag Casting Parts Qhov laj thawj tseem ceeb tshaj plaws kuj tseem yog "kev sib txuas ua ke" ntawm cov txheej txheem kev ntsuas, tag nrho cov kev xav tau ntawm cov casting muaj lub sij hawm ntev zog, qhov taw tes no, thiab tuag- txheej txheem casting nws tus kheej me ntsis contradictory.
Cov yam ntxwv feem ntau ntawm kev quab yuam solidification shrinkage yog lub sij hawm luv luv, feem ntau tsuas yog thiab "sequential solidification" ntawm ib -plaub los yog tsawg dua, yog li, ntawm lub hauv paus ntawm kev tuag-casting txheej txheem, qhov sib ntxiv ntawm yuam shrinkage txheej txheem ntsuas, thiab tuag-casting txheej txheem cov yam ntxwv, yuav ua tau zoo heev los daws qhov poob ntawm casting.
Muaj ob hom kev kawm kom ua tiav qhov yuam kev shrinkage ntawm castings. Tuag Casting Parts Ib qho yog qhov tseem ceeb ntawm kev tshem tawm qhov tsis xws luag ntawm cov castings, ib qho yog qhov℃uas lub sab hauv ntawm cov nplej tawg lossis lub xeev forging tuaj yeem ua tiav. Yog tias koj xav siv cov lus sib txawv los qhia ob qhov sib txawv no, ces, tus qub peb siv tau "squeeze to make up", tom kawg, peb siv tau "forging thiab shrinkage" los qhia.
Ib lub tswv yim kom paub meej txog yog tias qhov shrinkage yog ib qho ncaj qha txhais tau tias nws tsis tuaj yeem ua tsis ncaj. Cov txheej txheem, peb tuaj yeem muaj cov txheej txheem parameter qhia, qhov no yog "shrinkage siab."
Ntawm lub hauv paus ntsiab lus ntawm lub cev, lub tswv yim ntawm lub siab tuaj yeem tshwm sim hauv ob qhov xwm txheej, ib qho yog nyob rau hauv cov kua dej, uas yog, "Archimedes 'txoj cai" lub sijhawm, Tuag Casting Parts txhawm rau kom paub meej tias peb txhais nws li "kua siab", thaum lwm qhov tshwm sim hauv lub xeev, thiab peb txhais nws li "khoom siab". Nws yuav tsum raug sau tseg tias qhov kev siv ntawm lub tswv yim ntawm lub siab nyob rau hauv ob lub xeev sib txawv. Yog tias peb tsis meej pem, yuav muaj teeb meem loj.
"Kua siab", nws tsuas yog siv tau rau cov kua system, Tuag Casting Parts nws cov kev taw qhia siab tuaj yeem hloov mus, tuaj yeem tig, tab sis nyob rau hauv cov khoom theem system tsis muaj feem xyuam.
Lub shrinkage ntawm cov tuag castings yog nyob nruab nrab ntawm ib nrab- khoom thiab lub xeev, nws tus nqi siab yog directional, nws yog ib hom vector siab, thiab nws cov kev taw qhia yog tib yam li cov ntaub ntawv shrinkage quab yuam.
Yog li ntawd, Tuag Casting Parts hom kev xav tias los ntawm kev ua kom lub siab ntawm tuag-casting tshuab lub tog raj kheej siab, los ntawm kev ua kom lub siab txhaj tshuaj filling siab los daws cov tuag castings shrinkage porosity, uas lub siab no - txhaj tshuaj yuav raug xa mus rau tag nrho cov txheej txheem ntawm casting solidification theem, lub realization ntawm lub tswv yim ntawm casting shrinkage yog lawm.
