CAJ | 학술논문

针对摩托车发动机左盖成品率和生产效率较低的问题，利用铸造数值模拟软件Anycasting模拟了铸件压铸成形中金属液充型和凝固过程，分析了问题产生的原因。结果表明，金属液充型过程中存在涡流、卷气现象，铸件壁厚处存在孤立的液相区，导致铸件出现缩孔、缩松、气孔等缺陷；冷却系统设计的不合理延长了金属液凝固时间，影响了铸件生产效率。通过改变进料方式、优化内浇口和溢流槽、增加冷却水道和局部冷却等措施，铸件的成品率和生产效率得到了较大的提高。
침대마탁차발동궤좌개성품솔화생산효솔교저적문제，이용주조수치모의연건Anycasting모의료주건압주성형중금속액충형화응고과정，분석료문제산생적원인。결과표명，금속액충형과정중존재와류、권기현상，주건벽후처존재고립적액상구，도치주건출현축공、축송、기공등결함；냉각계통설계적불합리연장료금속액응고시간，영향료주건생산효솔。통과개변진료방식、우화내요구화일류조、증가냉각수도화국부냉각등조시，주건적성품솔화생산효솔득도료교대적제고。
The filling and solidification process in die-casting of the left cover of a motorcy-cle engine was simulated by using numerical simulation software Anycasting to analyze the defect cause and to solve the problem of relatively low qualified rate and production effi-ciency of the product. The results show that the main factors are the existence of eddy current and gas-volume phenomenon in the filling process of liquid metal and the existence of isolated liquid region in thick wall area,which leads to the defects of shrinkage cavity, porosity and pores, etc. The unreasonable design of cooling system extends the liquid met-al solidification time that influences the production efficiency. The qualified rate and produc-tion efficiency of the product were increased by changing the feeding mode, optimizing the ingate and overflow tank, adding the cooling channel and local cooling.