Xuab zeb core tsim yog ib qho tseem ceeb ntawm cov txheej txheem casting nyob rau hauv foundries, qhov twg intricate duab thiab sab hauv kab noj hniav yog tsim nyob rau hauv cov hlau qhov chaw. Nkag siab txog ntau hom xuab zeb cores, cov hauv paus ntsiab lus ntawm kev teeb tsa, lawv fixation thiab qhov chaw yog qhov tseem ceeb rau kev tsim cov khoom zoo.
Hom Sand Cores
Xuab zeb cores tuaj nyob rau hauv ntau hom, txhua tus pab ib lub hom phiaj nyob rau hauv cov txheej txheem casting:
1.Qhuav Sand Cores: Cov no yog tsim los ntawm cov xuab zeb sib txuas nrog cov resin thiab ci los txhim kho lub zog. Lawv yog siv rau cov duab intricate thiab cov kab noj hniav nyob rau hauv qhov chaw siab qhov tseeb yuav tsum tau.
2.Ntsuab Sand Cores: Cov no yog tsim los ntawm cov xuab zeb ntub thiab feem ntau yog siv rau hauv cov ntawv yooj yim uas tsis tsim nyog muaj zog.
3.Roj Sand Cores: Cov no muaj kev sib raug zoo nrog cov roj thiab muab kev sib tsoo zoo dua li cov xuab zeb qhuav, ua rau lawv zoo tagnrho rau kev siv qhov yooj yim tshem tawm ntawm cov tub ntxhais yog tsim nyog.
4.Cold Box Cores: Cov no yog tsim los ntawm kev siv cov ntaub ntawv uas hardens ntawm chav tsev kub, muab qhov sib npaug ntawm lub zog thiab yooj yim ntawm kev tshem tawm.
5.Plhaub Cores: Cov no yog tsim los siv cov xuab zeb-coated uas yog rhuab los ua ib lub plhaub. Lawv muab qhov zoo tshaj plaws nto tiav thiab qhov tseeb qhov tseeb.
Lub hauv paus ntsiab lus ntawm Sand Core Setting
Kev teeb tsa cov xuab zeb cores kom raug yog qhov tseem ceeb rau qhov zoo ntawm qhov kawg casting. Cov hauv paus ntsiab lus suav nrog:
1.Kev sib tw: Cov cores yuav tsum tau ua kom raug nrog cov pwm kom ntseeg tau tias qhov kawg qhov ntev ntawm cov casting yog qhov tseeb. Misalignment tuaj yeem ua rau muaj qhov tsis xws li misruns thiab hloov.
2.Kev ruaj ntseg: Cov cores yuav tsum ruaj khov nyob rau hauv cov pwm kom tsis txhob txav mus los thaum lub sij hawm nchuav, uas tuaj yeem ua rau muaj qhov tsis xws luag.
3.Qhov cua: Kev tso pa kom raug yuav tsum tau muab tso rau cov pa roj kom dim thaum lub sij hawm nchuav, tiv thaiv cov roj porosity hauv qhov kawg casting.
4.Txhawb nqa: Cov qauv kev txhawb nqa tsim nyog yuav tsum nyob rau hauv qhov chaw los tuav cov cores nyob rau hauv txoj hauj lwm, tshwj xeeb tshaj yog nyob rau hauv cov pwm complex uas siv ntau cores.
Fixation thiab Positioning ntawm Sand Cores
Kev txhim kho thiab qhov chaw ntawm cov xuab zeb cores yog ua tiav los ntawm ntau txoj hauv kev los xyuas kom meej tias lawv nyob hauv qhov chaw thaum lub sij hawm casting txheej txheem:
1.Core Prints: Cov no yog qhov txuas ntxiv ntawm cov pwm kab noj hniav uas tuav cov tub ntxhais hauv txoj hauj lwm. Lawv muab cov cuab yeej siv kho qhov tseem ceeb thiab ua kom muaj kev sib haum xeeb.
2.Chaplets: Cov no yog cov hlau me me uas tuav cov tub ntxhais hauv qhov chaw. Lawv yog tsim los fuse nrog cov hlau molten, ua ib feem ntawm qhov kawg casting.
3.Core Boxes: Cov no yog siv los tsim cov xuab zeb cores thiab xyuas kom lawv haum zoo kawg nkaus hauv cov pwm. Kev tsim ntawm lub thawv tseem ceeb yuav tsum suav rau qhov shrinkage thiab nthuav ntawm cov xuab zeb.
Negative Cores
Cov cores tsis zoo, lossis cov ntsiab lus tsis zoo, yog siv los tsim cov undercuts lossis cov yam ntxwv sab hauv uas tsis tuaj yeem tsim nrog cov cores. Lawv feem ntau yog tsim los ntawm wax lossis lwm yam ntaub ntawv uas tuaj yeem raug tshem tawm tom qab txheej txheem casting. Kev tsim cov cores tsis zoo yuav tsum tau ua tib zoo saib xyuas kom lawv tuaj yeem raug tshem tawm yooj yim yam tsis muaj kev puas tsuaj rau cov casting.
Venting, Assembly, thiab Pre-Assembly ntawm Sand Cores
1.Qhov cua: Kev tso cua kom raug yog qhov tseem ceeb kom tso cai rau cov pa roj carbon monoxide uas tsim tawm thaum lub sij hawm nchuav kom khiav tawm. Vents tuaj yeem tsim nyob rau hauv lub hauv paus los yog ntxiv raws li cov khoom sib cais. Kev tso pa tsis txaus tuaj yeem ua rau muaj roj porosity thiab lwm yam tsis xws luag.
2.Kev sib dhos: Hauv cov pwm nyuaj, ntau lub cores yuav tsum tau sib sau ua ke los ua cov duab kawg. Qhov no yuav tsum muaj kev sib raug zoo thiab kho kom zoo kom cov cores haum ua ke kom raug. Kev sib dhos jigs thiab fixtures feem ntau yog siv los pab hauv cov txheej txheem no.
3.Ua ntej sib dhos: Pre-assembling cores sab nraum pwm tuaj yeem txhim kho qhov tseeb thiab txo lub sijhawm teeb tsa. Qhov no suav nrog kev sib sau cov cores rau hauv ib chav tsev ua ntej muab tso rau hauv pwm kab noj hniav. Pre-assembly yog tshwj xeeb tshaj yog pab tau rau cov loj los yog complex cores uas yog ib qho nyuaj rau lis ib tug neeg.
Post lub sij hawm: Oct-31-2024