The cold shut defect was found at the oil hole at the far end of the die casting part, and the air hole defect was found after machining, as shown in Figure 1. Track the qualification rate of three batches of die castings, as shown in the table. It...
In order to solve the problems of cold shuts and blowholes in pressure casting, the following methods are adopted for adjustment: 1) Modify the mold and set a slag collecting bag (see Figure 1) at the oil plugging position of the die casting parts, which can effectively discharge the...
Pressure casting Pressure casting refers to the process of injecting molten metal into the mold under the action of other external forces (excluding gravity). Pressure casting in a broad sense includes pressure casting, vacuum casting, low-pressure casting, centrifugal casting, etc; Narrow sense of pressure casting refers to the metal...
Low pressure die casting makes the metal liquid fill in the anti gravity direction by controlling the gas flow. It has the characteristics of controllable filling, continuous fluid, good mechanical properties, complex forming castings and low cost. It has been widely used in the production of automobile cylinder block....
Die casting technology uses the piston to fill the mold cavity with molten liquid metal at high pressure and high speed, and the liquid metal solidifies under high pressure to form the casting. The productivity of die casting is high. The castings formed by die casting have the characteristics...
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...