叉车转向桥铸件的铸造工艺优化

Optimization of Forklift Steering Axle Castings Process Optimization

介绍了叉车转向桥的铸件结构及技术要求,根据铸件的结构特点,初步制定了2种工艺方案,并利用数值模拟软件Pro CAST进行分析,预测缩孔、缩松在铸件中可能出现的位置,根据模拟分析结果对工艺进行优化,在铸件顶部左右两侧分别加设侧冒口,发现铸件顶部缩凹完全消失,缩孔、缩松缺陷也得到了一定的改善。通过提高浇注温度和浇注速度试验,发现提高浇注温度能明显改善铸件质量,浇注温度为1 400℃时,可获得较佳性能的转向桥铸件,而较大的浇注速度会增大铸件的缺陷趋势。

The structure and technical requirements of the forklift steering axle were introduced. According to the structural characteristics of castings, two kinds of process schemes were developed and analyzed by ProCAST to predict the possible position of shrinkage porosity and cavities in castings. According to the resuhs of simulation analysis,risers were set on the left and right side on top the casting for optimization. Shrinkage depression was completely disappeared and shrinkage porosity and cavities were also under suppression. By increasing the pouring temperature and pouring speed, it was found that the high casting temperature could improve casting quality obviously. When the pouring temperature was 1 400℃, the steering axle casting had better performance. But high pouring speed could increase the defect tendency of the casting.