一种GIS用低压铸造盖板铸件仿真分析与工艺优化  

Simulationg Analysis and Process Optimization of Low Pressure Casting Cover Plate for GIS

作　　者：李红强 朱广 何伟国 LI Hongqiang;ZHU Guang;HE Weiguo(Xi'an XIKAI Precision Foundry Co.Ltd.,Xi'an 712046)

机构地区：[1]西安西开精密铸造有限责任公司,西安712046

出　　处：《特种铸造及有色合金》2024年第9期1282-1285,共4页Special Casting & Nonferrous Alloys

摘　　要：通过AnyCasting软件对一种气体绝缘开关(GIS)用金属型低压铸造铝合金盖板工艺进行充型凝固仿真分析,研究了该盖板密封槽出现铸造缺陷的原因并给出了改进措施,最后进行了生产验证。结果表明,当模具温度取工作温度下限与上限时,初始工艺充型凝固仿真分析发现法兰面没有出现缩孔、缩松缺陷。该盖板出现密封槽缺陷,主要由于冒口排气不畅,导致金属液实际浇注高度不足所致,法兰保温冒口浇注实际高度小于1.24倍法兰厚度,冒口不能对法兰有效补缩,导致法兰密封槽出现缩孔、缩松缺陷。工艺改进后,浇注铸件保温冒口浇注高度不低于1.55倍铸件法兰厚度,铸件合格率达到99%以上。模拟结果与实际情况相符。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 casting 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 filling 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 effectively 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 

分 类 号：TG249.2[金属学及工艺—铸造] TP311[自动化与计算机技术—计算机软件与理论]