After the process design of nodular cast iron, ProCAST was used for process simulation, and the results showed that there was shrinkage hole at the center of the tooth, and the scope of shrinkage defect was larger than the standard requirements. The simulation results are shown in Figure 1....
Due to the paste solidification mode of nodular cast iron and its poor welding performance, it is very important to prevent the shrinkage defects in nodular cast iron castings by designing the quenching system when producing nodular cast iron castings with complex structures. Solidification analysis is carried out for...
The selection of product pouring position is closely related to the product structure, production conditions of the factory, quality requirements of nodular iron castings and other factors, and also directly affects the determination and implementation of the final casting process plan. The pouring position of nodular cast iron cylinder...
At present, the preparation methods of bimetallic composite roll in China mainly include inlaying and cladding, surfacing, etc. There are limitations such as complex process, high cost, poor effect, low production efficiency, etc. However, by using the connection method of centrifugal casting intermediate layer transition to improve the bonding...
1. Structure of nodular cast iron The material grade of ductile iron castings is QT450-10, the unit weight of ductile iron castings is 3.02kg, and the overall dimension is 185 mm × 74 mm × 163 mm, the structure of nodular cast iron is shown in Figure . 2....
The structure and technical requirements of automobile brake caliper castings are described from the aspects of process layout, riser design, gating system design, etc. The casting process of nodular cast iron castings is changed from the traditional vertical placement of the cylinder barrel to the horizontal placement of the...
Through analysis, the main reasons for the air hole defects on the surface of the driving wheel are that the air volume of the coated sand core increases, the wall thickness of the nodular cast iron is thin, and the exhaust is poor. In order to solve the blowhole...
After the process design of nodular cast iron, ProCAST was used for process simulation, and the results showed that there was shrinkage hole at the center of the tooth, and the scope of shrinkage defect was larger than the standard requirements. The simulation results are shown in Figure 1....
According to the structure and characteristics of nodular cast iron driving wheel, the parting surface is selected at the center perpendicular to the axis of the part, and the parting is symmetrical. Since the tooth part does not allow the die angle, the core assembly process method is adopted...
The drive wheel is an important part of a large crawler agricultural tractor. The material grade of nodular cast iron is GGG60-DIN1693. See the table for the mechanical properties of the material. The overall dimensions are ϕ 916 mm × 526 mm, 260 kg mass, gear structure, 19 teeth...