摘要
根据散热片结构,对铝合金散热片的压铸工艺方案进行设计,然后采用Flow-3D软件对压铸工艺方案进行数值模拟。模拟结果显示,在散热片下部4个边角部位出现卷气缺陷。对工艺方案进行试生产,并对生产出的试样进行探伤和剖切观察,发现与模拟结果相符,在边角部位出现大量气孔、针孔。通过调整内浇口尺寸进行工艺优化,优化后模拟结果显示缺陷被有效消除。对优化方案进行试生产,并对生产出的试样进行探伤和剖切观察,结果表明,气孔、针孔得到有效消除,满足使用要求的同时降低了废品率。
According to its structure, the die casting process of aluminum alloy heat sink was designed, and then simulated by Flow-3D software.The results reveal that gas-entrapped defects can be observed in its four edges of part bottom. Crack detection and sectioning observation on the test-piece of the trial production show that the simulated results are well consistent with practical observation, where many blowholes and pinholes can be observed in the edge parts. Process optimization was carried out to adjust the size of ingate. Its results show that the defects can be eliminated effectively. Based on the optimized process, the samples were produced. The results are well in agreement with the simulated ones, where blowholes and pinholes are eliminated greatly, meeting application requirements and reducing the defec rive rate.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2018年第1期45-48,共4页
Special Casting & Nonferrous Alloys
基金
河南理工大学引进人才基金项目(Y2009-1)
河南理工大学校内基金资助项目(B2016-007)
关键词
散热片
压铸
数值模拟
工艺优化
Heat Sink, Die Casting, Numerical Simulation, Process Optimization
