Tsis tshua muaj siab casting yog hais txog ib txoj kev casting uas feem ntau muab tso rau saum lub crucible kaw, thiab compressed cua yog nkag mus rau hauv lub crucible los tsim kom tsawg siab (0.06-0.15 MPa) ntawm lub nto ntawm cov hlau molten, ua rau cov hlau ua kua los ntawm cov riser thiab sau cov pwm, thiab tswj kev ua kom khov. Txoj kev casting no muaj qhov zoo shrinkage them, ntom casting qauv, thiab yog ib qho yooj yim mus cam khwb cia loj nyias-walled complex castings tsis xav tau risers, nrog ib tug hlau rov qab tus nqi ntawm 95%. Tsis muaj kuab paug, yooj yim kom ua tiav automation. Tab sis cov cuab yeej siv tus nqi siab thiab cov khoom siv hluav taws xob tsawg. Feem ntau siv rau casting non-ferrous alloys.
Txoj Cai
Tsis tshua muaj siab casting yog ib txoj kev casting nyob rau hauv uas cov kua alloy yog nias rau hauv pwm kab noj hniav los ntawm hauv qab mus rau sab saum toj nyob rau hauv siab, thiab solidifies nyob rau hauv siab kom tau castings. Lub hauv paus ntsiab lus ntawm low-pressure casting yog qhia nyob rau hauv daim duab 1 "Lub hauv paus ntsiab lus ntawm Low Pressure Casting". Qhuav compressed cua los yog inert gas yog nkag mus rau hauv lub kaw crucible, thiab nrog kev pab los ntawm lub siab ua hauj lwm ntawm cov hlau ua kua nto, cov hlau kua yog smoothly sau rau hauv pwm los ntawm lub sprue los ntawm hauv qab mus rau sab saum toj raws li tus riser. Lub filling siab feem ntau yog 20-60kPa. Tom qab lub casting yog tag nrho solidified, tso cov roj siab ntawm cov kua nto, kom cov hlau cov kua uas tsis tau solidified nyob rau hauv lub riser thiab khiav ntws mus rau hauv lub crucible los ntawm nws tus kheej qhov hnyav, thiab ces qhib lub pwm kom tshem tawm cov casting.
Cov txheej txheem yooj yim:
1. Kev npaj pwm
Ua ntej, nws yog ib qho tsim nyog los tsim ib lub pwm uas tuaj yeem siv rau qhov tsis tshua muaj siab casting. Cov pwm no yuav tsum muaj peev xwm tiv taus qhov kub thiab txias ntawm cov kua hlau, thiab muaj lub zog txaus los xyuas kom meej qhov zoo ntawm cov khoom. Feem ntau, cov pwm yog tsim los ntawm cov khoom siv refractory thiab coated nrog ib txheej tshwj xeeb ntawm cov khoom siv sab hauv los tiv thaiv hlau adhesion.
2. Kev npaj ntawm qhov cub cua sov
Txhawm rau kom sov cov hlau mus rau qhov kub txaus kom nws ntws tau, yuav tsum tau npaj lub qhov cub cua sov. Cov cua kub cua sov feem ntau siv cov pa roj lossis hluav taws xob los muab lub zog cua sov. Thaum cua sov hlau nyob rau hauv lub cub tawg, nws yog ib qho tsim nyog los xyuas kom meej tias nws ncav cuag qhov kub txaus kom tig mus rau hauv lub xeev ua kua.
3. Hlau melting
Kub cov hlau nyob rau hauv ib lub qhov cub kom txog thaum nws tag nrho melts. Thaum lub sij hawm tus txheej txheem no, nws yog ib qhov tsim nyog yuav tsum tsis tu ncua do cov hlau kom paub meej tias nws yog uniformly rhuab thiab melted.
4. Pwm pretreatment
Ua ntej nchuav hlau rau hauv pwm, nws yog ib qho tsim nyog yuav tau kho cov pwm ua ntej. Cov txheej txheem no suav nrog kev ntxuav cov pwm thiab siv cov txheej txheem tshwj xeeb los tiv thaiv hlau adhesion. Tom qab ntawd muab cov pwm tso rau hauv lub tshuab uas tsis tshua muaj siab casting los npaj rau kev txhaj tshuaj hlau.
5. Hlau txhaj tshuaj
Thaum cov hlau yog tag nrho melted thiab pwm yog npaj txhij, nws yog lub sij hawm los pib txhaj cov hlau. Nyob rau hauv qis-pressure casting, lub taub hau filling yog siv los txhaj hlau rau hauv pwm. Lub taub hau filling feem ntau yog tsim los ntawm qee lub qhov, los ntawm kev tswj tus nqi ntws thiab ceev.
6. Cov khoom cua txias
Thaum cov hlau ua tiav cov pwm thiab tau txias, cov casting tuaj yeem raug tshem tawm. Feem ntau, nws yog ib qho tsim nyog yuav tsum tau tos ib lub sij hawm los xyuas kom meej tias cov casting tau txias tag thiab solidified. Tom qab ntawd cov casting tuaj yeem raug tshem tawm ntawm pwm.
7. Tom qab ua tiav ntawm qhov chaw
Thaum kawg, tom qab ua tiav yog xav tau rau cov castings. Cov txheej txheem no suav nrog tshem tawm cov khoom siv ntau dhau thiab kho qhov chaw. Feem ntau, cov tshuab lossis cov cuab yeej siv tau yuav tsum tau ua kom tiav cov haujlwm no.
Daim ntawv thov
Tsis tshua muaj siab casting yog qhov ntxov tshaj los tiv thaiv lub ntiajteb txawj nqus casting tshuab, uas tau pib siv nyob rau hauv industrial ntau lawm nyob rau hauv lub 1940s. Niaj hnub no, tsis tshua muaj siab casting yog tsuas yog siv rau zus tau tej cov aluminium alloy thiab magnesium alloy qhov chaw, xws li tsheb log nyob rau hauv kev lag luam tsheb, lub tog raj kheej blocks, lub tog raj kheej taub hau, pistons, missile casings, impellers, cua deflectors thiab lwm yam castings nrog complex duab. thiab cov kev xav tau zoo tshaj plaws rau cov tshuab hluav taws xob sab hauv. Thaum tsis tshua muaj siab casting yog siv los tsim cam khwb cia hlau, xws li cam khwb cia hlau log, tshwj xeeb refractory ntaub ntawv yuav tsum tau siv rau lub lifting yeeb nkab. Tsis tshua muaj siab casting kuj tseem siv tau rau me me tooj liab alloy castings, xws li cov yeeb nkab fittings, chav dej faucets, thiab lwm yam.
Automotive manufacturing kev lag luam: Automotive manufacturing yog ib qho tseem ceeb daim ntawv thov cheeb tsam ntawm low-pressure casting. Los ntawm kev siv cov cuab yeej siv hluav taws xob qis qis, cov tuam txhab tsim tsheb tuaj yeem tsim ntau yam ntawm qhov nyuaj, nrog rau cov khoom siv cav thiab cov khoom sib kis.
Kev lag luam aerospace: Hauv kev lag luam aerospace, nws yog ib qho tsim nyog los tsim cov khoom sib txawv, nrog rau cov turbine hniav thiab cov khoom siv dav hlau. Tsis tshua muaj siab casting tshuab tuaj yeem pab cov tuam txhab tsim cov khoom zoo no.
3. Industrial machinery manufacturing kev lag luam: Industrial machinery manufacturing yog lwm qhov loj daim ntawv thov cheeb tsam ntawm low-pressure casting domain. Los ntawm kev siv cov cuab yeej siv hluav taws xob qis qis, ntau yam khoom siv tshuab ua haujlwm tau zoo tuaj yeem tsim tau, suav nrog cov iav, reducers, thiab cov tshuab sib kis.