汽车铝合金减震塔的压铸工艺优化
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摘要
分析汽车用减震塔铸件的结构特征,设计了其压铸工艺,然后利用数值模拟方法分析了铝液的流动及充型过程。结果表明,铝液在减震塔型腔中充型较为平稳,前端含氧化夹杂、卷气量大的铝液全部进入溢流槽中,避免了铸件内部因卷气而产生缺陷。另外,通过局部激冷等方法,解决了局部厚大部位易产生缩孔缺陷的问题,最终获得品质良好的铝合金减震塔压铸件。
The die casting process was designed on the basis of analyzing the structural characteristics of the shock tower,and then the flow and filling process of the molten Al alloy were simulated by using simulation software.The results show that the filling of Al alloy melt presents stable in the mold cavity,and the molten metal containing inclusion and large volume of gas at the front enters the overflow launder,avoiding the defects caused by engulfing gases inside the castings.In addition,the rapid cooling method was applied to eliminate the shrinkage defects of the local thick parts,and finally the shock tower with good quality was produced.
The die casting process was designed on the basis of analyzing the structural characteristics of the shock tower,and then the flow and filling process of the molten Al alloy were simulated by using simulation software.The results show that the filling of Al alloy melt presents stable in the mold cavity,and the molten metal containing inclusion and large volume of gas at the front enters the overflow launder,avoiding the defects caused by engulfing gases inside the castings.In addition,the rapid cooling method was applied to eliminate the shrinkage defects of the local thick parts,and finally the shock tower with good quality was produced.
引文
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[3]黄正华,张银帅,宋东福,等.压铸铝合金的应用及研究进展[J].材料研究与应用,2017,11(1):1-5.
[4]黄晓锋,谢锐,田载友,等.压铸合金的发展现状与展望[J].热加工工艺,2008,37(21):145-149.
[5]胡祖麒,万里,吴树森,等.高强韧压铸Al-Mg-Si-Mn合金的微观组织及力学性能[J].中国有色金属学报,2013,23(3):616-622.
[6]朱必武,刘筱.铝合金薄壁压铸件研究现状及进展[J].特种铸造及有色合金,2016,36(9):931-934.
[7]阮明,刘海峰,姚红,等.大型薄壁铝合金减震塔砂型铸造技术研究[J].铸造,2017,66(4):327-336.
[8]罗康淳.铝合金压铸件压力铸造成形数值模拟研究[D].杭州:浙江工业大学,2009.
[9]韩雄伟,李欣星,陈祖红.基于ProCast的铝合金压铸模热应力场数值模拟[J].特种铸造及有色合金,2011,31(11):837-839.
[10]余敏强,夏伟,曹文炅,等.铝合金压铸件充型凝固过程及气体卷入的数值模拟[J].热加工工艺,2010,39(1):36-39.
[11]李世钊,吴树森,方健儒,等.汽车变速箱壳体的压铸过程模拟及工艺优化[J].特种铸造及有色合金,2011,31(4):315-317.
[12]潘宪曾.压铸模具设计手册[M].北京:机械工业出版社,1998.
[13]陈国桢,肖柯则,姜不居.铸件缺陷和对策手册[M].北京:机械工业出版社,1996.