Precision castings are metal parts with high precision and quality manufactured through precision casting technology. Its high dimensional accuracy and good surface quality can meet complex assembly and usage requirements. Different types of precision castings play important roles in industries such as aerospace, automotive, and mechanical manufacturing. We believe that with the continuous advancement of technology, precision castings will be widely used in more fields, bringing more possibilities for industrial development.

The manufacturing process of precision castings is very complex, including model manufacturing, sand mold preparation, smelting casting, cleaning, heat treatment, mechanical processing and other multiple links. Among them, model manufacturing is a crucial step, which can be divided into two forms: solid mold and modeling mold. Solid molds are made of metals such as copper and aluminum, while molding molds are made from materials such as gypsum, resin, or fiberglass. These molds have the characteristics of high precision, high strength, and good corrosion resistance, which can meet the requirements of precision castings.

What are the design principles and key points of precision castings?

Material selection. In the design of precision castings, it is necessary to select suitable materials to meet their specific requirements. The material should have good casting performance to ensure the stability and controllability of the process. Secondly, the material needs to meet the requirements of the mechanical properties, corrosion resistance, thermal stability, and other aspects of the components in the usage environment. When selecting materials, factors such as cost and availability also need to be considered.

Shape design. The shape design of precision castings should fully consider the functional and process requirements of the components. The shape design should meet the mechanical performance requirements of the components during use, including strength, stiffness, toughness, etc. At the same time, it is also necessary to consider the external dimensions, fitting accuracy, and other requirements of the components. In addition, it is necessary to avoid or reduce stress concentration areas of components to improve their service life.

Process performance. In the manufacturing process of precision castings, it is necessary to consider the issue of process performance. It is necessary to control the casting temperature to ensure the overall quality and accuracy requirements of the castings. Secondly, it is necessary to consider the influence of factors such as material solidification and shrinkage on the shape of castings, and take corresponding design and process measures to compensate. In addition, it is necessary to consider the requirements for surface smoothness, internal structure, and other aspects.

Precision control. In the design of precision castings, special attention should be paid to precision control. It is necessary to choose appropriate fitting tolerances to ensure the reliability and stability of components during the assembly process. Secondly, it is necessary to consider the quality requirements of the casting surface to avoid defects such as porosity, inclusions, and cracks. In addition, it is necessary to inspect and measure the castings to ensure the accuracy of their size and shape.

Precision castings have a wide range of applications in different industries. In the aerospace field, precision castings are commonly used to manufacture aircraft engine components, turbine blades, etc. Due to its high dimensional accuracy and good surface quality, it can meet the requirements of complex environments such as high temperature and high pressure. In the field of automotive manufacturing, precision castings are widely used in the production of key components such as engines, chassis, and transmissions.