OPTIMIZATION OF SOLIDIFICATION PROCESS OF UPPER TURNTABLE CASTING BASED ON PRO CAST
The turntable is used to drive the drilling tool rotation in the workover and plug drilling,which is suitable for realizing reverse and casing milling.The foundry process design is more and more important in the casting quality for obtaining a quality turntable.This article takes an upper turntable body as an example,the optimization of solidification technology is analyzed based on Pro CAST.The upper turntable body made from HT300 has a net weight of around 502 kilograms,which belongs to medium diameter disc part.Given the structural characteristics and parting surface,a wraparound injection flat pouring and a bottom injection vertical pouring are proposed,and the filling velocity fields of molten metal and defects of the upper turntable body are analyzed and optimized.The results show that the bottom injection vertical pouring could complete the filling process within about 40.39 seconds.However,many defects such as shrinkage porosity were found around a series of holes,which could be improved by riser and cold iron.The filling time was reduced to 29.30 seconds by the quadratic optimization,realizing the transformation from mushy solidification to sequential solidification.The best casing process of the upper turntable body was obtained based on the quadratic optimization.
万方数据
维普
