The casting process in Dalian is mainly divided into several types, including sand casting, metal casting, and pressure casting. Among them, sand casting is a common method. It uses sand as the mold material, by pouring liquid metal or alloy into the mold and obtaining the required casting after cooling. This method has low cost, strong adaptability, and is widely used in various fields.
The manufacturing process of castings mainly includes mold making, melting, pouring, cooling, and cleaning. Make corresponding molds according to the design requirements of the parts, which must have a certain strength and accuracy and be able to withstand thermal pressure at high temperatures. The mold is usually made of materials such as sand mold, metal mold, gypsum mold, and air glue. Then, melt the metal in the furnace and perform degassing, alloy adjustment, and other processes as needed. Next, pour the melted metal into the mold, wait for it to cool and solidify, take out the mold, clean the surface of the casting from impurities such as sand and oxides, and conduct preliminary finished product inspection. Perform subsequent processes such as mechanical processing, spraying, and heat treatment on castings as needed.
How to ensure dimensional accuracy and compatibility in Dalian casting design?
In the design process, it is necessary to consider the characteristics of materials and factors that affect dimensional accuracy and compatibility. For example, the shrinkage rate and thermal expansion coefficient of casting materials have a significant impact on dimensional accuracy and compatibility. Design engineers need to select suitable materials and adjust design dimensions based on their characteristics.
Secondly, in the design process, it is necessary to consider the shrinkage and fragmentation issues of the casting. These issues often lead to inconsistent or inaccurate dimensions. To ensure dimensional accuracy and compatibility, design engineers need to follow some principles for preventing shrinkage and damage. For example, appropriate wall thickness and lofting radius can be used to avoid shrinkage problems, and damage can be reduced by increasing rounded corners and flat surfaces.
In addition, to ensure dimensional accuracy and compatibility, design engineers should also use appropriate tolerances and fit selections. Tolerance refers to the allowable range of dimensional changes, while fit refers to the relative relationship between dimensions. By selecting tolerances and fits reasonably, compatibility between different parts can be ensured and dimensional accuracy can be controlled. Design engineers can use international standards or internal company standards to guide the selection of tolerances and fits.
Although the manufacturing process of castings may be relatively complex, castings have many advantages, making them the main choice for the manufacturing industry. The manufacturing cost of castings is relatively low, allowing for mass production and the recycling of waste materials. Secondly, complex shaped components can be manufactured through the casting process, and these components have high dimensional stability and accuracy. In addition, castings also have good mechanical and heat resistance properties, which can meet the needs of various applications.
