Aluminium alloy tuag-casting yog cov khoom siv dav siv hauv kev tsim khoom thiab lub neej. Nws ua lub luag haujlwm tseem ceeb hauv tsheb, aerospace, khoom siv hluav taws xob, kev tsim tshuab, rooj tog zaum thiab khoom siv hauv tsev, thiab lwm yam. Txawm li cas los xij, hauv cov txheej txheem tsim khoom tiag tiag ntawm aluminium alloy tuag castings, cov chaw tsim khoom feem ntau ntsib teeb meem mob taub hau - undercasting. Under-casting defects tsis tsuas yog cuam tshuam rau qhov zoo thiab kev ua tau zoo ntawm cov khoom, tab sis kuj yooj yim ua rau loj nyiaj txiag poob rau tuag-casting Hoobkas tuam txhab uas muag.
dab tsi yog vim casting?
Hauv qab-casting yog hais txog qhov tshwm sim uas thaum lub sij hawm tsim cov txheej txheem ntawm aluminium alloy tuag-casting qhov chaw, qee qhov ntawm cov molded aluminium alloy tuag-casting qhov chaw tsis tiav, xws li dents, nyias phab ntsa, raug embedded qhov chaw, thiab lwm yam. nws yooj yim, aluminium alloy tuag-casting qhov chaw yuav muaj ntau yam tsis xws luag thaum lub sij hawm tsim cov txheej txheem, suav nrog qee qhov tsis xws luag hauv qab-casting. Cov teeb meem tsis zoo no tuaj yeem cuam tshuam qhov zoo thiab kev ua haujlwm ntawm tuag castings thiab yuav tsum tau tshawb xyuas thiab kho kom raws sijhawm. Nov yog qee qhov kev cuam tshuam tsis zoo hauv qab no:
- Porosity thiab npuas: Porosity thiab npuas yog ib qho ntawm feem ntau undercast defects nyob rau hauv aluminium alloy tuag castings. Lawv feem ntau tshwm sim los ntawm qhov nyuaj tshem tawm cov roj hauv cov kua hlau lossis cov txheej txheem hlau tsis tiav. Porosity thiab gas npuas yuav ua rau kom brittleness thiab txo lub zog ntawm cov khoom.
- Kub tawg: Kub tawg yog cov kab nrib pleb tshwm sim los ntawm qhov tsis sib xws ntawm qhov txias txias lossis kev ntxhov siab hauv cov hlau. Cov kab nrib pleb no feem ntau tshwm sim nyob rau hauv nyias-walled qhov chaw ntawm tuag castings los yog cov cheeb tsam ntawm cov phab ntsa tsis sib xws, cuam tshuam lub zog thiab durability ntawm ib feem.
- Shrinkage: Shrinkage yog hais txog qhov shrinkage hauv zos los yog tsis sib xws hauv cov tuag castings. Qhov no tuaj yeem tshwm sim los ntawm cov khoom cua txias sai dhau los yog tsis txaus hlau filling. Shrinkage porosity txo lub zog thiab nruj ntawm ib feem.
- Slag inclusion: Slag inclusion yog hais txog cov khoom impurities lossis oxides nkag rau hauv tuag castings. Cov kev suav nrog no tuaj yeem ua rau muaj qhov tsis muaj zog hauv cheeb tsam thiab tsim cov kab nrib pleb hauv ib feem.
- Underfill: Underfill yog thaum cov hlau tsis puv tag nrho cov pwm, feem ntau pom nyob rau hauv qhov chaw nrog cov geometry nyuaj. Qhov no yuav ua rau cov khoom tsis tiav thiab tsis zoo.
- Misalignment: Misalignment yog hais txog lub zos misalignment los yog sib txawv ntawm qhov chaw tsim nyob rau hauv lub tuag casting. Qhov no tuaj yeem cuam tshuam qhov haum thiab kev ua haujlwm ntawm ntu.
- Cold Shut: Cold Shut yog hais txog qhov sib txawv ntawm qhov txias txias ntawm ib feem lossis tag nrho cov tuag casting. Qhov no tuaj yeem ua rau inhomogeneity hauv cov qauv, uas cuam tshuam rau lub zog thiab hardness ntawm cov khoom.
Yuav ua li cas los txhim kho lub Undercasting ntawm Aluminium Alloy Tuag Castings
Txhawm rau txo lossis tshem tawm cov teeb meem hauv qab no, yuav tsum tau ua ntau yam kev tswj xyuas cov txheej txheem, xws li kev txhim kho pwm tsim, kho cov txheej txheem tuag-casting, thiab txhim kho cov kua hlau ntws thiab cua txias. Tsis tas li ntawd, kev soj ntsuam zoo thiab kev tswj cov kauj ruam kuj tseem ceeb txuas los xyuas kom meej qhov zoo ntawm aluminium alloy tuag castings.
khoom tsim
Qhov laj thawj tseem ceeb rau qee qhov qis qis yog tias cov khoom tsim tsis tau txiav txim siab tag nrho. Pib los ntawm kev tsim cov khoom lag luam, cov khoom siv fluidity thiab filling tej yam kev mob yuav tsum raug txiav txim siab. Ua kom zoo rau cov qauv thiab phab ntsa thickness tsim ntawm qhov tuag-casting qhov chaw kom tsis txhob muaj cov cheeb tsam uas nyuaj rau ua tiav thiab xyuas kom meej tias molten aluminium alloy tuaj yeem ntws sib npaug mus rau txhua qhov chaw.
pwm tsim
Kev tsim pwm tsis tsim nyog kuj yog ib qho tseem ceeb ua rau undercasting ntawm aluminium alloy tuag castings, thiab kev txhim kho pwm tau dhau los ua lwm txoj hauv kev los daws qhov tsis xws luag ntawm aluminium alloy tuag castings. Dihui Tuag Casting muaj kev paub dhau los hauv kev tsim pwm thiab tsim khoom. Nws yog kev paub zoo hauv kev tsim cov pwm tsim thiab tsim thiab ua cov pwm. Qhov saum npoo tiav thiab qhov sib piv ntawm cov pwm kab noj hniav uas tsim tau yog qhov siab heev. Nyob rau tib lub sijhawm, tseem muaj cov txheej txheem zoo rau kev teeb tsa lub rooj vag, dej ntws, qhov cua, thiab lwm yam hauv cov pwm los xyuas kom meej tias cov hlau molten tuaj yeem ntws sib npaug mus rau ntau qhov chaw thiab zam qhov teeb meem ntawm kev ua tsis tiav.
tswj qhov kub thiab txias
Nws tseem yog ib qho tseem ceeb heev uas yuav tsum nruj me ntsis tswj qhov kub ntawm cov hlau molten. Nyob rau hauv cov txheej txheem tsim khoom tiag tiag, qhov tshwm sim ntawm qhov tsis xws luag hauv qab-casting tshwm sim los ntawm kev tswj qhov kub thiab txias kuj yog siab heev, thiab lawv tsis yooj yim los nrhiav. Ntau cov nroj tsuag tuag-casting uas tsis tau ntsib txaus pom qhov tsis xws luag hauv qab-casting. Thaum kawg, lawv feem ntau tsom mus rau cov khoom thiab pwm nws tus kheej thiab tsis nco qab txog kev tswj qhov kub thiab txias, uas ua rau muaj ntau lub zog khib nyiab los nrhiav cov hauv paus hauv paus ntawm kev ua kom tsis zoo ntawm qhov tuag-casting. Tswj qhov kub ntawm cov molten aluminium alloy kom tsis txhob siab dhau los yog qis dhau los kom ntseeg tau tias cov dej ntws nruab nrab ntawm cov hlau thiab cov txiaj ntsig zoo.
Txhaj ceev thiab tswj siab
Ntxiv nrog rau kev tswj qhov kub thiab txias, kev txhaj tshuaj ceev, thiab kev tswj lub siab kuj tseem ceeb heev. Tsim nyog tswj qhov kev txhaj tshuaj nrawm thiab siab kom ntseeg tau tias cov molten aluminium alloy tuaj yeem ntws sib npaug mus rau txhua qhov chaw ntawm cov pwm kab noj hniav kom tsis txhob ua tiav cov filling. Tsis tas li ntawd, kev saib xyuas cov pwm thiab cov khoom siv kuj tseem ceeb heev. Tsis tu ncua tswj pwm thiab cov cuab yeej siv los xyuas kom meej tias lawv cov kev ua haujlwm ib txwm muaj thiab qhov chaw raug, thiab tsis txhob cuam tshuam los ntawm cov khoom siv tsis ua haujlwm lossis poob.