The composite squeeze casting method and a composite squeeze casting forming system suitable for the squeeze casting of large parts are proposed. The key melt conveying system and forming die in the system are studied. The above research content will be verified on the basis of the composite squeeze casting forming experiment of large aluminum wheel hub.
Firstly, the key technical indexes of the formed specimen are analyzed, and then the general hydraulic press and the injection system of indirect squeeze casting are transformed to make it suitable for the composite squeeze casting method of large parts. Secondly, the composite squeeze casting forming test is carried out on the large wheel hub made of aluminum alloy to verify the forming ability and function of the composite squeeze casting method and related equipment and devices. Finally, according to the relevant experimental results, The die structure was optimized.
According to the system design scheme, the composite squeeze casting forming system was designed and manufactured, and the forming test of large Al Cu wheel hub was carried out. The test results show that the composite squeeze casting method has a faster pressure build-up speed and is conducive to improving the quality of castings. On the premise of giving full play to the characteristics of the floating rigid support mold, the quantitative mold filling is basically ensured. The precision and performance index of the large wheel hub parts formed by the system basically meet the design requirements, which verifies the feasibility, effectiveness and practicability of the system.