基于数值模拟的铜合金轴承保持架压铸成形缺陷分析

Flaw Analyses of Die Casting Copper Alloy Bearing Cage Based on Numerical Simulation

使用压铸法生产铜合金轴承保持架,可缩短加工时间,提高生产率,节约能源。运用有限元法对铜合金轴承保持架压铸过程中的充型和凝固过程进行模拟,结果表明,在金属液流动末端齿位上开设的积渣包,减少了铸件中夹杂,冷隔等铸造缺陷产生。对于压铸件常有的气孔缺陷,采用真空压铸法,通过对比试验观察,压铸后铸件内部气孔减少,保持架具有更好的使用性能。

Using die casting technology to produce copper alloy bearing cage can shorten the process time, enhance the production efficiency and save the energy sources obviously. Finite-element method was used in this study to simulate the process of filling and solidifying of copper alloy bearing cage. The result indicated that the slag traps placed on the tooth of bearing cage can reduce the trapped oxides and cold lap in the castings, and using vacuum die casting method can also reduce the gas cavity defects, therefore the sound copper alloy bearing cage can be obtained.