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针对某大型复杂铝合金动力部件的压铸成形,应用数值模拟和物理模拟方法,在准确把握铝合金液体流动充型状态的基础上,提出了改善铝液流动形态,优化真空排气结构的技术措施,大大减少了铸件内部的卷气缺陷。同时还采用活块、局部加压、模温精确控制等技术手段消除了内部缩孔/缩松缺陷,使铸件外观及内部品质均达到了设计要求,在短期内即实现了批量生产。
Aimed at the die-casting forming of a large and complex aluminum alloy dynamic component, the numerical simulation and physical simulation method are used to accurately grasp the flow filling status of the aluminum alloy, and the technical measures to improve the flow pattern of the aluminum liquid and optimize the structure of the vacuum exhaust gas are proposed , Greatly reducing the internal volume of the casting defects. At the same time, it also eliminates the internal shrinkage / shrinkage defects by means of technical measures such as live block, partial pressure and precise mold temperature control, so that the appearance and internal quality of castings meet the design requirements and mass production is realized in a short period of time.