Internal combustion engine occupies a very important social position in power machinery. The internal combustion engine has high thermal efficiency, high power and zero line coordination, so the mechanical kinetic energy must have good application characteristics and advantages. It can be widely used in mechanical devices. As an important...
Riser is a kind of structure for storing liquid metal in the mold, which is used to compensate the possible shrinkage during the forming process of the casting and prevent the shrinkage cavity and porosity of the casting. According to the design principle of riser, the solidification time of...
In order to have an effective understanding of vermicular graphite cast iron technology, we must have a comprehensive understanding of its graphite growth state and production mechanism. The graphite in vermicular graphite cast iron is called vermicular graphite cast iron because its production state is vermicular. During the growth...
Through the observation of the defects, it is found that the defects are shrinkage porosity and shrinkage cavity, which are concentrated in the final solidification part of the product and are caused by insufficient feeding of riser. ZHY casting uses electric heating riser to improve feeding efficiency. Electric heating...
Diesel engine is widely used, working environment is poor, working time is long. Because the cylinder head of diesel engine bears the effect of high pressure and high temperature gas for a long time, it is required that the cylinder head can not be deformed and cracked. At the...
1. Static structural analysis Finite element static structural analysis is carried out for the box type and deep cavity type frames respectively. The same parameters are used to mesh and load the frames of the two structures. The deformation, stress and strain of the two structures under the worst...
Although the metallurgical quality of molten iron is affected by many factors, foundry workers have found the quantitative index of metallurgical quality, namely undercooling. Undercooling degree is an important quantitative index to judge the metallurgical quality of molten iron, which directly reflects the metallurgical quality of molten iron. It...
After the sample navigation is completed, the detection can be started, as shown in Figure 1. Move the sample table so that the sample is under the objective lens, and adjust the working distance between the sample and the objective lens. Select the required aperture and probe, first minimize...
1. Set ice pack and extend setting time appropriately Through X-ray examination and local dissection, it is found that the internal structure of the casting block hole is relatively compact, and the original structure design does not have defects such as porosity and cold shut, which means that the...
As shown in Figure 1, a low-pressure casting water-cooled housing for electric bus is in the shape of a drum with a diameter of 280mm and a height of 350mm; The wall thickness of the casting is 3-6 mm, and the casting material is A356.2 aluminum alloy. During solidification...