采用ProCAST软件对铝合金活塞浇铸过程中模具的温度场、应力场进行了有限元仿真.根据热、应力场仿真结果,预测活塞模具的易失效区域,通过与实际失效结果对比,发现仿真结果中易失效区域位置与实际模具失效区域位置相吻合;并通过研究不同模具预热温度对浇铸过程中模具热应力场的影响,发现提高模具的初始预热温度,可以有效降低浇铸过程中模具型腔表面所受的热应力,从而有助于模具寿命的提高.
The temperature and stress field of aluminum alloy piston mould in gravity casting has been simulated with FEM software ProCAST ,and makes a prediction on area prone to failure of the mould and the results are consistent with the actual mold failure area .In addition ,the influence of different mould preheating temperature on the stress field was investigated ,and the result shows that increas-ing the mould preheating temperature can effectively reduce the thermal stress on the cavity surface of mould during casting ,and therefore helps to improve the mould life .
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