铝合金轮毂加压铸造技术研究

Research on Pressure Casting Technology of Aluminum Alloy Wheel

针对传统低压铸造工艺补缩压力低、补缩能力不足的问题,本文在其基础上提出改进创新,新工艺中将补缩压力提高到2MPa,显著增强了铸件凝固过程中的补缩驱动力。利用数值模拟软件对一款16英寸的铝轮毂进行低压铸造工艺和改进新工艺的收缩缺陷分析对比。结果表明:传统低压铸造工艺轮毂的内轮缘部位、轮辋与轮辐连接部位、轮盘中心部位均出现了明显的缩孔缩松缺陷,且凝固时间较长;第一次工艺优化,以上部位出现收缩缺陷概率明显降低,缺陷面积显著减小;第二次工艺优化,轮毂中的缩孔缩松缺陷全部消除,且凝固时间也大幅缩短,生产效率大幅提升。

Aiming at the problem that the traditional low pressure die casting process has the disadvantages of low filling pressure and insufficient feeding capacity, this paper puts forward some suggestions on improvement, in the new process, the feeding pressure was increased to 2MPa, which greatly enhanced the feeding force during the casting solidification process. The shrinkage defects of a 16 inch aluminum wheel with low pressure die casting process and improvement of new technology were analyzed by means of numerical simulation software. The results show that there are obvious shrinkage porosity and shrinkage defects in the inner rim, connection site of the rim and the spokes and the center of the wheel, and the solidification time is very long;After the first process improvement, the probability of shrinkage defects in the above parts decreased obviously, and the defect area decreased significantly;After the second process improvement, the shrinkage porosity and shrinkage defects in the hub are eliminated, and the solidification time is shortened, and the production efficiency is greatly improved.