Before 2013, the company’s production performance of gas turbine castings was dominated by only a few small and medium-sized steel castings such as valves, gas seals and blade rings, and almost all the large cylinder castings and other difficult parts and components required for supporting were purchased from the...
Large and medium-sized engine is an important power source of mechanical equipment, which is widely used in automobile, ship, engineering machinery, agricultural machinery and other fields. It is an indispensable part of human industrial and agricultural production activities, and has important strategic significance for the development of China’s national...
The gating system is composed of a gate cup, a runner, a sprue and an inner gate. It is a channel in the mold to introduce liquid metal into the mold cavity (Fig. ). The role of the gate cup is to carry the molten metal poured into the...
Before designing the mold process, the natural properties of the parts should be analyzed, including weight, volume, surface area, number and location of hot spots. The number and location of hot spots are the key factors affecting the solidification sequence of castings. The location of hot spots can be...
Drawing is to adjust the taper of the mold or casting surface so that the mold and product can be demoulded smoothly from the mold. The minimum draft angle of the model mainly depends on the height of the model. It is generally believed that the higher the height...
Defect analysis is mainly based on shrinkage, shrinkage, depression or collapse. ProCast software is used to analyze shrinkage, shrinkage, depression and collapse of casting after pouring and to optimize reasonably according to simulation.After the simulation analysis, the casting defects appear as shown in the figure. In Figure (a), due...
Because hot joints will occur in large and thick parts during the cooling process of castings, and casting defects such as shrinkage and voids are easy to occur, the change process of solid fraction during solidification of castings is analyzed to analyze the possible positions of hot joints, and...
After filling, in order to analyze casting problems such as subsequent solidification defects, the solidification temperature field is further analyzed. The figure shows the temperature field changes during the solidification process of casting metal liquid.From the drawing, it can be seen that the whole part is in simultaneous solidification...
The net weight of machine tool body parts is 1762.75 kg, and the overall contour size of parts is 1985 mm x 1650 mm x 460 mm, which belongs to medium-sized parts.Due to the complex structure and large voids, it is not suitable to use mechanized production line, hand-shaped...
The flow of liquid metal in filling process has a great influence on the quality of casting. If the design of casting system is unreasonable, casting defects such as insufficient pouring, cold insulation, sand flushing and coil gas will often occur in casting. The filling process of liquid metal...