Mukunda et al. Studied the influence of mold speed and casting temperature on the filling effect. When the diameter of the casting is 8.1cm, the length is 11cm and the wall thickness is 6mm, they found that there is an optimal rotational speed of 800rpm, under which the casting with uniform wall thickness can be obtained, and the tribological properties of the casting are also the best. When the rotational speed is lower than this optimal rotational speed, the wall thickness of the casting is seriously uneven. When the rotational speed is higher than this optimal rotational speed, only a small part of the liquid metal flows along the axial direction before the casting is completely solidified. The lower the casting temperature is, the higher the mold speed is needed to obtain high quality castings.
Xu yaozeng et al. Established a three-dimensional model of liquid metal flow in the filling process of horizontal centrifugal casting of composite roll, and solved the flow field distribution under the action of gravity and centrifugal force by using professional casting software ProCAST. The results show that the wall thickness of centrifugal casting is the largest at the entrance of casting, and gradually decreases along the length of casting pipe. The author thinks that this is related to the casting method.
Zeng Xingwang, Chen Liliang, et al. 1491 analyzed the flow and heat transfer of metal liquid according to the process characteristics of centrifugal casting of cast steel sleeve. Considering the centripetal acceleration and Coriolis acceleration, a mathematical model describing the filling and solidification characteristics of this casting method was successfully established, and the forming process of cast steel sleeve was simulated by numerical simulation technology Visual simulation. The w-finite difference method and staggered grid discretization scheme are used to discretize the casting in space and time, and SOLA-VOF method is used to solve the problem. The numerical simulation software for mold filling process of centrifugal casting developed by them has been applied to the production project of cooperation between Huazhong University of science and technology and Angang machinery company, which has important reference value for actual production.
Li Changyun et al. Carried out the hydraulic test of vertical centrifugal casting, and verified the numerical simulation results. The results show that the hydraulic test results are consistent with the numerical simulation results. In order to study the filling process of horizontal centrifugal casting, song Nannan et al. Carried out hydraulic test of Ya centrifugal casting, discussed the influence of mold speed on the flow pattern, and reached the same conclusion as the theoretical research. It can be seen that the mold in the test device is transparent, which is very conducive to the photography.
