摘要
局部加压压铸工艺是压铸中用于消除厚壁处缩孔、缩松缺陷的一种新技术。开发了一种多回路、参数调整方便、简单可靠、价格低廉的移动式局部加压装置,成功地应用于复杂压铸件的生产。探讨了局部加压结构形式、加压杆与杆套的配合公差对加压杆使用性能的影响,得到了8mm和12mm两种加压杆的合理公差,确保了加压杆的使用寿命。研究局部加压工艺参数对铸件内部质量的影响,当局部加压压力越大时,加压效果越好;在加压压力一定时,局部加压开始时间短可获得较好的加压效果。采用局部加压压铸技术,提高了铸件的合格率,达到97%以上。
A novel process named local pressurization in the die casting was successfully used to deliminate shrinkage porosity at the thick section of the die castings recently. A movable local pressurization apparatus was fabricated and adopted to cast die castings on an industrial scale in the paper, which owns the following merits such as simple constructure, cheap and adjustable parameters. The effects of the pin style and the tolerance between and hole on the life span of pin were investigated. The optimized tol...
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2008年第S1期442-446,共5页
Special Casting & Nonferrous Alloys
关键词
压铸
局部加压
铝合金
缩松
die casting
local pressurization
Al alloy
shrinkage porosity
