With the help of AnyCasting software,the filling and solidification simulation analysis of permanent mold low-pressure casting process of aluminum alloy cover plate for GIS was carried out to understand the origination of cast-ing defects in cover plate sealing groove,and optimized measures were provided.Finally,production validation was conducted.The results indicate that when the mold temperature is set at the lower limit and the upper limit for the working temperature,absence of shrinkage and porosity defects on the flange surface is observed according to the fill-ing and solidification simulation analysis of the original process.The cover plate has a sealing groove defect,which is directly relevant with poor exhaust from the risers and the actual pouring inadequate height of the risers.The actual pouring height of the flange insulation riser is less than 1.24 times of the flange thickness,which has difficulty in effec-tively feeding the flange,resulting in shrinkage and porosity defects in cover plate sealing groove.Through optimizing designed scheme,the actual pouring height of the flange insulation riser is more than 1.55 times of flange thickness,and the qualified rate of the castings is over 99%.The simulation results are consistent with the actual ones
关键词
GIS/盖板/充型凝固/工艺优化/低压铸造
Key words
GIS/Cover Plate/Filling and Solidification/Process Optimization/Low Pressure Casting
维普
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