摘要
针对摩托车铝曲轴箱左盖压铸件壁厚差大、易出现缩孔缩松缺陷的问题,借助正交试验方法,对其压铸工艺过程进行了数值模拟,主要研究了浇注温度、模具温度、慢压射速度和快压射速度对金属液充型、凝固及缩孔缩松的影响。同时,对工艺参数进行优化,并通过生产实验进行验证。结果表明,提高慢压射速度,金属液充型时间缩短;提高模具温度,凝固时间延长,最大凝固速率降低;这4个因素对压铸缺陷的影响程度类似,并且缺陷均出现在薄壁壳体附近的厚壁处。
For motorcycle aluminum crankcase cover die casting wall thickness difference was big, porosity shrinkage defect problems, with the aid of the orthogonal experiment method, the die casting process was simulated, the pouring temperature, mold temperature, injection speed and slow fast injection speed on the liquid metal filling, solidification and shrinkage cavity, shrinkage porosity were studied. At the same time, the process parameters were optimized and the production experiments were validated. The results show that the time of the metal liquid filling is shortened. Increase the mold temperature, the solidification time is prolonged, the maximum solidification rate decreases. These four factors have similar influence on the casting defect, and the defect appears in the thick wall near the thin-walled shell.
出处
《铸造技术》
CAS
2018年第1期73-78,共6页
Foundry Technology
基金
重庆市教委科学技术研究项目(KJ1402901)
关键词
数值模拟
铝合金
压铸工艺
缺陷
numerical simulation
aluminum alloy
die casting process
defect
