CAJ | 학술논문

为保证大型铝合金铸件的质量，通过水力模拟和数值模拟两个途径优化铸造工艺；水力模拟依据相似理论，建立水力模型，选出最佳浇注系统，防止吸气、浇不足等缺陷；数值模拟通过计算铸件动态温度场，来预测缩孔、缩松等缺陷，据此来改变冒口、冷铁的尺寸及数量，控制铸件凝固顺序，保证铸件内部质量。最后，综合水力模拟和数值模拟结果，确定了合理的工艺方案，确保铸件一次浇注成功。
위보증대형려합금주건적질량，통과수력모의화수치모의량개도경우화주조공예；수력모의의거상사이론，건립수력모형，선출최가요주계통，방지흡기、요불족등결함；수치모의통과계산주건동태온도장，래예측축공、축송등결함，거차래개변모구、랭철적척촌급수량，공제주건응고순서，보증주건내부질량。최후，종합수력모의화수치모의결과，학정료합리적공예방안，학보주건일차요주성공。
Both hydraulic simulation and numerical simulation were used to optimize casting technology in order to ensure the quality of large alu minum alloy castings. Based on analogic theory, hydraulic model was founded to choose the optimum gating system for prevention from casting defects including gas hole and misrun. Numerical simulation was used to predict shrinkage cavity, porosity through calculating dynamic temperature field of aluminum casting. Based on numerical simulation, riser and chill size and amount were changed and castin gsolidification sequence was controlled to ensure inner quality of casting. At last, both hydraulic simulation and numerical simulation were synthesized to det ermine rational processing sketch for pouring success at first time