针对某铝合金复杂管铸件的尺寸、性能要求和铸造合金特点,采用精密树脂砂型真空吸铸方法,研究了铸件不同部位壁厚尺寸规律。通过浇注工艺的优化和合金力学性能的测试,获得了优化的铸造工艺参数,试制出了合格的铝铜系合金复杂管铸件。结果表明,树脂砂型真空吸铸工艺铸造铝铜系复杂管铸件是可行的,同时也能为复杂Al-Cu合金铸件研制提供参考。 Aiming at the size and performance requirements of an aluminum alloy tube casting and the characteristics of casting alloy, the precision resin sand vacuum casting method was used to study the rule of wall thickness in different parts of the casting. By optimizing the pouring process and testing the mechanical properties of the alloy, the optimized casting process parameters were obtained, and the qualified aluminum-copper alloy complex tube castings were manufactured. The results show that resin-sand vacuum casting process is feasible for casting aluminum-copper complex tube castings and also provides reference for the development of complex Al-Cu alloy castings.