Technical Principles Of Casting Processing

Casting machining koom nrog kev siv cov hlau cam khwb cia ua ib qho khoom tsis pub dawb thiab siv cov txheej txheem siv tshuab- xws li tig, milling, drilling, tho txawv, thiab sib tsoo- kom tshem tawm cov khoom ntau dhau ntawm qhov chaw, yog li ua tiav qhov ntev, zoo li, thiab qhov chaw zoo tau teev tseg hauv kev tsim. Txawm hais tias lub casting txheej txheem yog tsim los loj heev tom qab pouring thiab txias, cov teeb meem xws li dimensional deviations, nto roughness, thiab machining nyiaj feem ntau nyob twj ywm, yuav tsum tau ua ntxiv. Thaum lub sij hawm machining, txheeb ze cov lus tsa suab tshwm sim ntawm cov cuab yeej txiav thiab cov khoom ua haujlwm; lub cuab yeej txiav mus rau hauv qhov casting nto kom tshem tawm cov khoom siv ntau dhau, thaum kawg tsim cov khoom siv uas ua tau raws li cov lus qhia tshwj xeeb.

Lub hauv paus ntsiab lus ntawm casting machining yog kev tshem tawm cov khoom tiav los ntawm kev txheeb ze ntawm cov cuab yeej txiav (los yog cov cuab yeej abrasive) thiab cov casting. Hauv kev tig, piv txwv li, lub workpiece rotates ntawm lub tshuab cuab tam spindle thaum lub cuab yeej txav mus rau hauv ib qho kev taw qhia, tshem tawm cov khoom nce zuj zus los ntawm kev tswj qhov tob ntawm kev txiav thiab pub tus nqi. Milling siv lub siab-rotating cutter kom tshuab lub casting nto, ua kom muaj kev tsim cov yam ntxwv xws li tiaj tus, qhov, thiab nkhaus contours. Drilling feem ntau yog siv los tsim cov qhov, thaum tho txawv pab ntxiv txhim kho qhov ntev thiab qhov tseeb. Rau castings xav tau qhov siab precision thiab zoo tshaj qhov saum npoo, cov txheej txheem tiav zoo li kev sib tsoo kuj tseem yuav ua haujlwm.

Casting machining nthuav tawm cov kev sib tw tshwj xeeb piv rau cov txheej txheem machining steel, vim cov khoom siv sab hauv tuaj yeem muaj cov porosity, shrinkage kab noj hniav, suav nrog, lossis microstructural non{0}}uniformities. Ua ntej machining pib, nws yog ib qho tseem ceeb uas yuav tau xaiv txoj kev tsim nyog thiab txiav txim siab qhov tsim nyog machining nyiaj pub dawb raws li cov khoom siv casting thiab zoo. Thaum lub sij hawm tus txheej txheem, qhov tob ntawm kev txiav ntau dhau tuaj yeem ua rau muaj kev txiav ntau zog thiab cov cuab yeej hnav, qhov tsis txaus machining nyiaj yuav tsis ua kom tshem tawm qhov tsis xws luag. Yog li ntawd, ib tug staged mus kom ze-suav nrog ntxhib machining, semi-ua tiav, thiab ua tiav- feem ntau yog siv los tshem tawm cov khoom ntau dhau ua ntej, tom qab los ntawm kev txhim kho qhov tseeb ntawm qhov tseeb thiab qhov zoo ntawm qhov chaw.

Casting machining tseem yuav tsum tau tswj cov cua sov tsim, kev co, thiab deformation. Castings feem ntau muaj cov geometries nyuaj thiab qhov txawv txav ntawm phab ntsa tuab, ua rau lawv muaj kev cuam tshuam rau qhov tsis sib xws ntawm kev ntxhov siab thaum txiav. Yog li ntawd, kev xaiv kom zoo ntawm qhov chaw datums thiab txoj kev clamping yog qhov tseem ceeb thaum lub sij hawm teeb tsa los tiv thaiv workpiece deformation los ntawm kev quab yuam ntau dhau. Nyob rau tib lub sijhawm, kev txiav nrawm tsim nyog, tus nqi pub, thiab qhov tob ntawm kev txiav yuav tsum raug xaiv raws li cov khoom siv casting, thiab tsim kom txias thiab lubrication txoj kev ua haujlwm kom txo qis kev sib txhuam thiab kub hloov ntawm lub cuab yeej thiab cov khoom ua haujlwm. Kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov muaj peev xwm deformation thaum lub sij hawm machining ntawm nyias-walled los yog loj- nplai castings.

Thaum machining tiav lawm, kev ntsuas thiab kev tshuaj xyuas yuav tsum xyuas kom meej tias cov khoom ua tau raws li cov qauv tsim. Cov qauv tshuaj ntsuam xyuas muaj xws li qhov tseeb qhov tseeb, daim ntawv raug, qhov tseeb ntawm qhov chaw, thiab qhov roughness ntawm qhov chaw. Cov cuab yeej xws li vernier calipers, micrometers, qhov ntsuas qhov ntsuas sab hauv, thiab cov tshuab ntsuas kev sib koom tes (CMMs) feem ntau yog siv rau cov tshev no. Rau qhov tseem ceeb castings, kev tshuaj xyuas kuj yuav tsum tau ua los xyuas kom muaj kev cuam tshuam sab hauv uas tuaj yeem cuam tshuam kev ua haujlwm. Los ntawm cov txheej txheem ua ntu zus ntawm "casting-kev ntxuav ntawm qhov ntxhib casting- ntxhib machining-semi-finishing-finishing-kev soj ntsuam zoo," lub casting tau nce zuj zus mus ua kom tau raws li qhov kawg kev xav tau.