The above improvement scheme is used to verify the pouring production. Figure 1 is the foam pattern cluster and the deformation prevention treatment. The production results of the improved scheme are shown in Figure 2. No significant shrinkage defects are found when the shaft sleeve is cut open, and...
The mold filling and solidification of the improved process are simulated, and the following results are obtained: 1) Results of lost foam casting filling process From the filling time of lost foam casting, the maximum filling time of double-layer stepped type is 16.64s. Due to the use of double-layer...
Fig. 1 is a sectional view of the solidification time distribution during bottom injection. It can be seen that the slag inclusion riser, fork tip and sprue solidify the earliest and the solidification time is the shortest; The solidification time at the junction of the two fork arms and...
Figure 1 a) ~ g) shows the change process of mold filling temperature field of bottom injection trial production scheme. Figure a) it can be seen that the molten metal is filled with hollow runner just for 0.17 seconds, and the high temperature metal starts to connect with the...
The powerful surface function of UG is used to carry out three-dimensional modeling of complex long forks. The feature modeling function is used to design and model the gating system, riser and sand mold, assemble them and export Parasolid format documents (* x-t format documents) as a whole. When...
ZHY casting successively adopts two trial casting schemes of bottom injection and top injection to produce the complex ductile iron parts. The gating system of lost foam iron castings generally adopts bottom injection or side injection. The reason is that in general, lost foam iron castings can realize sufficient...
The material of a flat casting is aluminum alloy alsi17cu3. The liquidus temperature is 636 ℃, the solidus temperature is 492 ℃ and the pouring temperature is 745 ℃; The data of foam and dry sand are in ProCAST’s own database. The whole model consists of four parts: hollow...
The methods for solving the differential equation of heat conduction in solidification process mainly include finite element method (FEM), finite difference method (FDM) and BEM boundary element method (BEM), according to different discretization methods. FEM is an algorithm evolved from the classical variational method. It can divide irregular meshes...
The high appearance quality of lost foam casting products is one of its advantages, but its internal quality is difficult to control, which hinders its wider adoption and application. The internal quality problems of lost foam castings are mainly related to the solidification process characteristics of lost foam castings....
New production process of gray iron castings produced by direct ironmaking with water slag iron is introduced. The metallographic analysis and mechanical properties of gray iron castings produced by this method are tested. The lost foam casting process of gray iron castings produced by this process method was studied...