铝合金压铸件内部缩孔分析及对策

杨兴国

doi:10.15980/j.tzzz.2018.10.010

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铝合金压铸件内部缩孔分析及对策
Analysis and Countermeasures of Internal Shrinkage Cavity in Aluminum Alloy Die-castings
2018年38卷第10期页码：1079-1081
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.10.010

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[1]杨兴国.铝合金压铸件内部缩孔分析及对策[J].特种铸造及有色合金,2018,38(10):1079-1081.

Yang Xingguo. Analysis and Countermeasures of Internal Shrinkage Cavity in Aluminum Alloy Die-castings[J]. Special Casting & Nonferrous Alloys, 2018,38(10):1079-1081.
[1]杨兴国.铝合金压铸件内部缩孔分析及对策[J].特种铸造及有色合金,2018,38(10):1079-1081. DOI： 10.15980/j.tzzz.2018.10.010.

Yang Xingguo. Analysis and Countermeasures of Internal Shrinkage Cavity in Aluminum Alloy Die-castings[J]. Special Casting & Nonferrous Alloys, 2018,38(10):1079-1081. DOI： 10.15980/j.tzzz.2018.10.010.

摘要

从压铸件缩孔形成机理出发

结合实际的生产情况

发现导致摩托车曲轴箱体A面LD68孔缩孔的主要原因为模具局部温度过高和冲头油燃烧产物包裹。通过改善模具保全项目

使模温梯度趋于合理;减少冲头油用量并变更供给方式以避免其被燃烧产物包裹

最终将LD68孔铸造缩孔率降低约90%。

Abstract

Based on formation mechanism of shrinkage cavity in die castings

combined with the actual production

it is found that the origination of shrinkage cavity in LD68 castings is attributed to the higher local mold temperature and the wrapping combustion products of oil and fuel.By improving mold preservation project to ensure reasonable mold temperature gradient and reducing the amount of punch oil and changing the way of supply to avoid its combustion package

the shrinkage rate in LD68 hole is decreased by about 90%.