(1 清華大學(xué)實(shí)驗(yàn)室與設(shè)備處， 北京 1000842 清華大學(xué)機(jī)械系， 北京 100084
)
摘 要: 在低壓鑄造過程溫度場及流場實(shí)驗(yàn)的基礎(chǔ)上， 開發(fā)了基于SOLA-VOF算法的充型與凝固過程數(shù)值模擬軟件，對72-46輪轂鑄件進(jìn)行了模擬分析。 結(jié)果表明， 低壓鑄造充型過程中降溫明顯， 準(zhǔn)確的凝固模擬必須首先考慮充型。針對輪轂鑄件的充型特點(diǎn)， 開發(fā)了簡化充型模擬軟件。 簡化模擬得到的初始溫度場與采用SOLA-VOF算法的模擬結(jié)果基本吻合， 實(shí)現(xiàn)了為后續(xù)凝固模擬提供正確的初始溫度場的設(shè)計(jì)目標(biāo)。
關(guān)鍵字: 低壓鑄造 充型模擬 凝固模擬 輪轂鑄件 簡化算法
OF LOW PRESSURE DIE CASTING
ALUMINUM WHEEL CASTING
（Department of Mechanics, Tsinghua University, Beijing 100084, P. R. China）
Abstract:Based on the temperature measurements and mold filling experiments, a mold filling simulation software of Low Pressure Die Casting (LPDC) was developed by using SOLA-VOF algorithm. Simulation analyses of 72-46 aluminum wheel were conducted. The mold filling simulation results showed that it is necessary to proceed mold filling calculation at first and then solidification simulation since the temperature of liquid metal dropped greatly during mold filling. Based on the filling characteristics of LPDC wheel castings, a simplified mold filling simulation software was developed. The simulated initial temperature fields are in agreement with the simulated result by using the traditional SOLA-VOF algorithm. The main purpose of this software which is to provide a correct initial temperature distribution in the casting and the mold for the subsequent solidification simulation, was achieved.
Key words: low pressure die casting mold filling simulation solidification simulation wheel casting
