Cov txheej txheem casting ntawm grey hlau suav nrog peb lub ntsiab lus hu ua "peb yuav tsum" hauv kev lag luam casting: zoo hlau, zoo xuab zeb, thiab cov txheej txheem zoo. Cov txheej txheem casting yog ib qho ntawm peb yam tseem ceeb, nrog rau cov hlau zoo thiab cov xuab zeb zoo, uas txiav txim siab qhov zoo ntawm castings. Cov txheej txheem yuav tsim ib lub pwm los ntawm ib tug qauv nyob rau hauv cov xuab zeb, thiab ces ncuav molten hlau rau hauv pwm los tsim ib tug casting.
Cov txheej txheem casting muaj cov hauv qab no:
1. Pouring phiab: Qhov no yog qhov uas cov hlau molten nkag mus rau hauv pwm. Txhawm rau kom ntseeg tau tias qhov sib xws ntawm lub ncuav thiab tshem tawm cov impurities los ntawm cov hlau molten, feem ntau yog ib qho slag sau phiab ntawm qhov kawg ntawm lub phiab. Ncaj nraim hauv qab lub phiab yog lub sprue.
2. Khiav: Qhov no yog kab rov tav ntawm qhov casting system uas molten hlau ntws los ntawm sprue mus rau pwm kab noj hniav.
3. Rooj vag: Qhov no yog qhov chaw uas cov hlau molten nkag mus rau hauv pwm kab noj hniav los ntawm tus khiav. Nws yog feem ntau hu ua "qhov rooj" hauv casting. 4. Qhov cua: Cov no yog qhov nyob rau hauv cov pwm uas tso cai rau huab cua kom dim li molten hlau nyob rau hauv pwm. Yog hais tias cov xuab zeb pwm muaj permeability zoo, cov vents feem ntau tsis tsim nyog.
5. Riser: Qhov no yog ib qho channel siv los pub cov casting thaum nws txias thiab shrinks. Risers yog siv los xyuas kom meej tias cov casting tsis muaj voids los yog shrinkage kab noj hniav.
Cov ntsiab lus tseem ceeb uas yuav tsum xav txog thaum casting muaj xws li:
1. Kev taw qhia ntawm cov pwm: Lub tshuab nto ntawm cov casting yuav tsum nyob rau hauv qab ntawm cov pwm kom txo tau tus naj npawb ntawm shrinkage kab noj hniav nyob rau hauv cov khoom kawg.
2. Pouring method: Muaj ob txoj hauv kev tseem ceeb ntawm kev pouring - sab saum toj pouring, qhov twg cov hlau molten yog poured los ntawm sab saum toj ntawm pwm, thiab hauv qab pouring, qhov twg pwm yog sau los ntawm hauv qab los yog nruab nrab.
3. Qhov chaw ntawm lub rooj vag: Txij li cov hlau molten solidifies sai, nws yog ib qho tseem ceeb uas yuav tsum tau muab lub rooj vag tso rau hauv ib qho chaw uas yuav ua kom zoo txaus mus rau txhua qhov chaw ntawm cov pwm. Qhov no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv tuab-walled seem ntawm lub casting. Tus naj npawb thiab cov duab ntawm lub rooj vag yuav tsum tau txiav txim siab.
4. Hom rooj vag: Muaj ob lub ntsiab ntawm lub rooj vag - daim duab peb sab thiab trapezoidal. Cov rooj vag daim duab peb sab yog yooj yim ua, thaum lub rooj vag trapezoidal tiv thaiv slag los ntawm cov pwm.
5. Kev txheeb ze ntawm thaj tsam ntawm sprue, khiav, thiab lub rooj vag: Raws li Dr. R. Lehmann, qhov chaw hla ntawm sprue, khiav, thiab rooj vag yuav tsum nyob rau hauv qhov ratio A: B: C = 1: 2 :4. Qhov sib piv no yog tsim los tso cai rau cov hlau molten kom ntws ncaj nraim los ntawm lub kaw lus tsis muaj cuab yeej slag lossis lwm yam impurities hauv qhov casting.
Kev tsim cov txheej txheem casting kuj yog ib qho tseem ceeb rau kev txiav txim siab. Hauv qab ntawm lub sprue thiab qhov kawg ntawm tus khiav yuav tsum tau muab sib dhos kom tsis txhob muaj kev kub ntxhov thaum molten hlau yog nchuav rau hauv pwm. Lub sijhawm siv rau lub ncuav kuj tseem ceeb.
Post lub sij hawm: Mar-14-2023