Denis et al. Systematically studied the interface heat transfer behavior between aluminum alloy and mold shell in investment casting process, and studied the influence of various parameter errors on the calculation results of interface heat transfer coefficient. Shao Heng et al. Measured the temperature change of the mold shell...
1.Analysis of temperature field in filling process The actual production requires that the minimum temperature distribution is at the overflow groove, and the shell of the casting is the low temperature zone of the casting. In order to observe the temperature field distribution under different experimental parameters, the numerical...
Figure 1 is the flow field simulation diagram of automobile steering wheel formed by opposite side casting. It can be seen from the flow field simulation diagram of the side casting automobile steering wheel that the liquid metal first flows into the gating system, and then flows to the...
Establishment of casting model A356 aluminum alloy is selected as the die casting material. The casting aluminum alloy A356 is a typical aluminum silicon alloy, which has good fluidity, air tightness and corrosion resistance. It has no tendency of hot cracking and is easy to weld. It is used...
The metal in the filling process can be considered as incompressible fluid, which follows the hydrodynamics law and can be described by the conservation of mass and momentum. The mathematical forms of the metal are continuous equation and N-S equation. Continuity equation: For the incompressible fluid, ρ: V, V...
Establishment of 3D model and mesh generation The 3D model of die casting is carried out by Pro / E modeling software, and then the numerical simulation of die casting process is carried out by FLOW-3D simulation software. The 3D model completed on Pro / E is exported by...
In order to obtain the unique solution of hydrodynamics, not only the above basic equations, but also the boundary conditions and initial conditions need to be given. Initial condition Because of the unsteady flow of liquid metal in the filling process, the pressure field and velocity field of liquid...
Die casting, referred to as die casting, is a kind of precision casting method in which liquid or semi liquid metal is filled into the die casting cavity under the action of high speed and high pressure, and the liquid metal is rapidly solidified into a casting under a...
Solid liquid segregation is one of the main defects in thick wall products. Under the condition of good feeding condition and complete disappearance of shrinkage cavity and porosity, the performance of a single thick wall product at different positions is quite different. The most intuitive performance is that the...
The influence of process parameters on the shrinkage cavity and porosity in the semi-solid die casting process was studied by using the control variable method, and the causes were analyzed on the basis of empirical theory. (1) The shrinkage cavity and porosity defects in the experiment all appear in...