±0.1 to ±0.5 mm
The dimensional accuracy of die castings can usually reach a high level. The specific accuracy range and influencing factors are as follows:
Specific range of dimensional accuracy of die castings
The dimensional accuracy of die castings can generally reach ±0.1 to ±0.5 mm. This accuracy range is mainly affected by factors such as die casting process, mold design, material properties and subsequent processing. In addition, the general precision of die castings is IT13~IT15 in GB18001979, and the higher precision can reach IT10~IT11. The surface roughness Ra is 3.2~1.6um, and can reach 0.8um locally.
Main factors affecting the dimensional accuracy of die castings
Die casting process: Parameters such as pressure, speed, and temperature during the die casting process have a significant impact on dimensional accuracy. Reasonable process parameter settings can ensure that the molten metal is evenly filled in the mold, thereby improving the dimensional accuracy of the die casting.
Mold Design: The precision and structural design of the mold are directly related to the dimensional accuracy of the die casting. High-precision molds can reduce deformation and shrinkage of die castings and improve dimensional stability.
Material properties: Different metal materials have different properties such as fluidity and shrinkage during the die-casting process, which affects the dimensional accuracy of the die-casting parts. Selecting the right metal material is an important measure to improve dimensional accuracy.
Methods for Improving Dimensional Accuracy of Die Castings
Process Improvement: By optimizing die casting process parameters, such as adjusting pressure, speed and temperature, the dimensional deviation of die castings can be reduced and the precision can be improved.
Mold Optimization: The use of high-precision mold processing technology and advanced mold structure design can improve the durability and precision retention of the mold, thereby improving the dimensional accuracy of the die-casting parts.
Subsequent processing: For die castings with higher dimensional accuracy requirements, they can be refined and adjusted through subsequent machining, heat treatment and other process means to achieve higher precision requirements.
