Technical requirements for aluminum alloy die castings

Aluminum alloy die casting technical requirements refers to the specifications and standards that need to be met when die casting aluminum alloy materials. Aluminum alloy die casting is usually used in automotive, electronics, electrical appliances, furniture and aerospace and other fields in the manufacture of parts. The following is a detailed description of the technical requirements of aluminum alloy die casting.

First of all, aluminum alloy die casting should meet the requirements of material chemical composition, organization and performance. Aluminum alloy material composition and properties not only affect the quality and precision of die casting, but also directly affect its service life and safety. Therefore, in the die-casting process should be based on the use of suitable aluminum alloy materials, and ensure that their composition, temperature and other parameters are strictly controlled.

Secondly, the size and positional tolerance of aluminum alloy die casting should meet the design requirements. The dimensional and positional accuracy of die castings is one of the key factors in deciding whether they are qualified or not. For this reason, in the design and manufacturing stage, should be in accordance with the standards and specifications to accurately control the aluminum alloy die casting all aspects of the size and its positional tolerance, in order to ensure that exclude due to the size and positional tolerance caused by the deviation and error.

Third, the surface quality of aluminum alloy die casting should meet the relevant specification requirements. Aluminum alloy die casting usually should have a certain degree of beauty and finish, but also need to ensure good corrosion resistance and wear resistance. For these needs, usually use a variety of surface treatment methods, such as spraying, anodizing and so on, in order to meet the different needs of users.

Fourth, aluminum alloy die casting should also take into account its weldability and processability. Generally speaking, to ensure the availability and reliability of the die casting, the design should avoid as much as possible too many corners and edges, and leave enough margin to facilitate the subsequent processing and finishing. In addition, in the die casting manufacturing should also take into account whether it can be seamlessly connected with other parts and components is a very important point.

Finally, aluminum alloy die castings must undergo rigorous testing and can only determine its quality and performance. For example, size, hardness, function, corrosion resistance, high temperature resistance and fatigue strength, etc. need to undergo a variety of tests and evaluations to verify its qualification. This is one of the necessary procedures to ensure the quality of aluminum alloy die castings.

The specific technical requirements of aluminum alloy die castings include the following aspects:

1. Design requirements. Designers should carry out reasonable structural design, size arrangement and machining allowance setting of aluminum alloy die castings according to the use requirements and process requirements.

2. material requirements. Selection of suitable aluminum alloy materials, and according to the characteristics of the die casting, in order to ensure the mechanical properties at the same time to ensure that its melting point is moderate and easy to process.

3. process requirements. According to the type and performance of the die-casting machine, the development of the corresponding die-casting process, including the injection speed, injection pressure, injection time, needle size and position, lubricant type and method of use.

4. surface quality requirements. According to the use of requirements, the aluminum alloy die casting surface for reasonable treatment, such as removing bubbles, trachoma, oxide skin and other defects, improve surface finish.

5. Dimensional accuracy requirements. According to the use of requirements, the aluminum alloy die casting dimensional accuracy control, to ensure that the product can be accurate and stable operation.