Design and Numerical Simulation of Casting Process for Steel Casting Worm-gear Boxseat
The casting process of steel casting JH-14 worm-gear boxseat was designed by using traditional methods.According to the complex structural characteristics of the worm-gear boxseat,the two side pouring sprues were adopted,and the two open risers along with chills were designed on the top of the casting to ensure progressive solidification.The 3-D model of the casting was built and the Viewcast casting simulation software was employed to simulate the solidification process of the steel casting.The simulation shows that the shrinkage defects forms at the thick shell and the joint of the shell.According to the results and combining with theoretical analysis,the casting process was improved by increasing the size of riser neck and chills and adding the number of the riser.The results show that the shrinkage only appears at the riser because the progressive solidification is achieved,the shrinkages in the casting are avoided.Then the reasonable casting process is obtained.