Yuav Ua Li Cas Txhim Kho Lub Airtightness ntawm Aluminium Alloy Tuag Castings

Aluminium alloy tuag castings yog tsim los ntawm siab - siab, ib qho -moulding, muab siab qhov tseeb thiab du nto tiav. Lawv xav tau kev tshaj tawm tsawg kawg nkaus -machining thiab tuaj yeem raug kho ncaj qha rau saum npoo xws li polishing thiab anodizing. Cov txheej txheem molding ruaj khov ua kom muaj qhov sib xws hauv kev tsim khoom ntau thiab tswj tau zoo deformation tsis xws luag. Siv dav hauv cov twj tso kua mis, lub cev lub cev lub cev, lub hau kawg lub cev, lub tshuab ua liaj ua teb, thiab ntau yam khoom siv kho vajtse, cov castings no muab tus nqi zoo heev - kev ua tau zoo thiab tuaj yeem ua kev cai - tsim raws li cov duab kos lossis cov qauv.

 

Leakage nyob rau hauv aluminium alloy tuag castings feem ntau yog tshwm sim los ntawm cov teeb meem sab hauv xws li roj porosity, shrinkage porosity, txias shuts, thiab filling defects. Txhawm rau txhim kho airtightness tsis tu ncua, ib qho kev qhia dav dav hais txog cov khoom siv raw, kev tuag- txheej txheem casting, pwm tsim, thiab tom qab- ua tiav.

 

Kev tswj cov khoom raw yog lub hauv paus. Ua ntej siv high-purity tuag-casting aluminium alloys thiab nruj me ntsis tswj cov roj cov ntsiab lus ntawm molten aluminium. Ua zoo refining thiab degassing thaum lub sij hawm melting kom tshem tawm cov yaj hydrogen thiab txo subcutaneous porosity. Khaws qhov kub thiab txias kom ruaj khov kom tiv thaiv kom tsis txhob muaj roj ntau dhau los ntawm kev kub dhau. Tsis tas li ntawd, nruj me ntsis tswj cov impurity theem- xws li hlau thiab silicon- los tiv thaiv kev tsim ntawm microporosity thiab txo cov voids sab hauv ntawm qhov chaw.

 

Kev ua kom zoo tshaj qhov tuag- txheej txheem casting tuaj yeem txo qhov tsis xws luag sab hauv. Tsim nyog nce qhov kev txhaj tshuaj nrawm kom ntseeg tau tias cov hlau molten nyob rau hauv cov kab noj hniav kom zoo, tiv thaiv kev nkag mus rau huab cua uas ua rau cov roj foob kaw. Kho kev siv zog kom compact lub casting thaum lub sij hawm solidification, yog li compressing micropores thiab shrinkage porosity. Optimize tuav lub sij hawm los tiv thaiv voids tshwm sim los ntawm solidification shrinkage nyob rau hauv tuab seem. Tsim lub rooj vag system rationally los xyuas kom meej cov kev taw qhia solidification, tsom rau shrinkage defects nyob rau hauv lub rooj vag / seem seem es tsis nyob rau hauv siab- bearing sealing zones. Tsis tas li ntawd, txo cov cua cov ntsiab lus hauv cov kab noj hniav los ntawm kev ntxiv cov venting channel thiab cov dej ntws tawm kom nrawm nrawm.

 

Txhim kho pwm tsim yog qhov tseem ceeb. Ntxiv cov cua txias rau hauv cov cheeb tsam uas tsis sib xws ntawm phab ntsa tuab kom sib npaug ntawm cov cua txias thiab tshem tawm cov chaw "kub"- thaj chaw uas ua rau shrinkage, porosity, thiab to. Xyuas kom cov phab ntsa tuab kom zoo ib yam li qhov ua tau ntawm qhov chaw sib khi kom tsis txhob muaj cov thickness hauv zos ntau. Tsim kom muaj qhov chaw venting channel kom tsis txhob muaj cov pa roj los ntawm kev tsim cov cua hauv hnab ris. Tsis tu ncua tuav cov pwm los xyuas kom nruj haum ntawm txoj kab sib cais, yog li txo qis kev tsis sib haum xeeb los ntawm flash.

 

Rau cov castings uas twb tau ua lawm, lub tshuab nqus tsev impregnation tuaj yeem siv los kaw cov micropores. Lub casting yog submerged nyob rau hauv ib tug impregnating kua; Nyob rau hauv lub tshuab nqus tsev thiab lub siab, lub sealant nkag mus rau hauv lub qhov hws me me thiab kho, sealing tawm cov kab hauv microscopic to. Impregnation daws cov teeb meem microporosity feem ntau, ua kom zoo dua qhov airtightness ntawm lub siab- bearing castings xws li vaj tse thiab lub cev twj tso kua mis.

 

Los ntawm kev siv cov txheej txheem dav dav- sib txuas degassing thaum lub sij hawm melting, siab - siab siv zog, optimized venting, balanced cooling, thiab nqus impregnation-cov teeb meem leakage nyob rau hauv aluminium alloy tuag castings yuav daws tau, ua kom ntev -lub sij hawm ua hauj lwm nyob rau hauv cov huab cua los yog dej.