Research on the Influence of Casting Stress on Processing Dimensions in Screw Compressor

Author of the article:LI Rihua, ZHANG Tianyi

Author's Workplace：Gree Intelligent Equipment Co., Ltd., Zhuhai 519000, China

Key Words：screw compressors; casting stress; processing dimensions

Abstract：The screw compressor had a very high requirement on the dimensional machining precision of casting, and it was belong to the precision machining workpiece. The dimensions of castings processed after artificial aging annealing and cooling in sand mould were compared and measured. The results show that cooling and aging annealing treatment in sand chamber have no obvious effect on machining dimension. Casting sand mold cooling temperature below 300 ℃ to meet the processing size requirements.