镁合金坐垫骨架压铸工艺数值仿真与优化

Numerical Simualtion and Optimization of Die-casting Magnesium Alloy Seat CushionFrame

利用CATIA软件对坐垫骨架辅助三维造型、网格划分,并通过仿真模拟软件ProCAST对其进行了数值模拟,完成了压铸工艺初步优化。首先设计并优化了浇注系统,然后选取浇注温度,模具温度、压射速度和低压压力4个工艺参数作为模拟工艺参数,对充型与凝固过程、温度场和速度场进行了数值模拟计算与分析,并对缺陷及其形成位置进行了预测,最终给出优化的压铸工艺参数:浇注温度为670℃,模具预热温度为190℃,压射速度为6 m/s和低压压力为0.15 MPa。

The die-cast process parameters of AE44 Mg alloy seat cushion frame were optimized by ProCAST software after three-dimensional modeling and meshment by CATIA software.Firstly,the pouring system was designed and gradually optimized.And the filling and solidification process,temperature field and velocity field,as well as prediction of defects with their positions were numerically simulated and analyzed through controlling the simulation process parameters,including pouring temperature,mold temperature,injection speed and low pressure.Finally,the optimal process parameters of die-casting are presented as follows:pouring temperature of 670 ℃,mold temperature of 190℃,injection speed of 6 m/s and low pressure of 0.15 MPa.