摘要
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。
Aiming at a die casting large complicated aluminum alloy power parts,some technological ways including improving flow types and optimizing vacuum exhausting structure are employed to significantly reduce the gas-entrapment defects in the parts on the basis of understanding flow and filling process of liquid aluminum alloy by numerical simulation and physical examination.Meanwhile,shrinkage porosity(hole) in the parts is eliminated by adopting movable insert,local pressurization and exact control for die temperature.Through above technological ways,both the appearance and quality of the parts can meet the designing requirements,realizing volumetric-production in a short time.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2009年第11期1030-1032,共3页
Special Casting & Nonferrous Alloys
关键词
气孔
数值模拟
物理模拟
大型复杂铝合金
真空压铸
Gas Hole,Numerical Simulation,Physical Examination,Large Complicated Aluminum Alloy Parts,Vacuum Die Casting
