Lifting box casting process design and numerical simulation
The material of the lifting box is ZG25CrNiMo,and the main shape is characterized by a ro-tary body,and the wall thickness is uneven.Select the process scheme of"the large side of the lifting ring shaft hole is facing down,the lifting lug and the small end face of the thick side wall are facing up",and the upper,middle and lower three unboxing shapes are set up respectively,and the riser,model body,core head and sprue are set respectively.The riser was designed by the analog-digital method,and the solidification simulation under the coupling conditions of pure temperature field and filling heat transfer was carried out with the HZCAE11.0 software,and one waist-shaped open riser and two cylindrical open risers were determined to be compensated on the thick-walled end face.The simu-lation results show that the shrinkage porosity of the thick and large hot joints is basically eliminated,and there is still looseness at the junction of the two walls in the middle of the casting,the junction between the bottom ring shaft hole and the inner side wall,but it can no longer be eliminated by riser shrinkage.In order to eliminate the above defects,an externally cooled iron is provided at the bottom to achieve better sequential solidification and replenishment.
NETL
NSTL
万方数据
维普
