一种特种汽车铰接件的铸造工艺设计及优化

Casting Process Design and Optimization of a Special Automobile Hinge

铰接件是特种汽车的关键零部件,在其铸造成形过程中,铰接件根部总会出现大的缩孔缺陷,严重影响铸件质量。本文基于ProCAST软件建立铰接件铸造成形仿真模型,分析铰接件充型、凝固过程,研究不同尺寸、形状的冒口对铰接件缩孔分布的影响规律。模拟结果表明,根据铸件结构设计的随形冒口对铰接件的缩孔消除影响最大,缩孔较初始方案减小了94.8%,铸件根部的缩孔由2.11 cm3减小到0.11 cm3,缩孔近似全部消除。进行X射线探伤,探测到的缩孔缺陷与模拟结果一致,可为后续实际生产提供指导。

Hinged parts are the key components of special vehicles.During the casting process,large shrinkage holes always appear at the root of the hinged parts,which seriously affects the quality of the castings.In this paper,based on ProCAST software,a simulation model of the casting forming of the hinged part was established,the filling and solidification process of the hinged part was analysed,and the influence of the risers with different sizes and shapes on the distribution of the shrinkage cavity of the hinged part was studied.The results show that the shape riser has the greatest influence on the extraction of shrinkage holes of hinged parts.The shrinkage holes are reduced by 94.8%compared with the initial process,and the shrinkage holes at the root of the casting are reduced from 2.11 cm3 to 0.11 cm3.The detected hole defects are consistent with the simulation results,which can provide guidance for subsequent actual production.