Development and Application of Die Casting Process with Local Pressurization for Aluminum Alloys

Liu Houyao1; Wan Li2; Huang Mingjun1; Chang Yiqian1; Huang Zhiyuan1Xu Feiyue1; Zhang Baizai1; Lai Daojin1; Zhou Haijun1; Ou Quan3

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Development and Application of Die Casting Process with Local Pressurization for Aluminum Alloys
Issue S1, Pages: 442-446(2008)
Published： 2008 ，
DOI：

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[1]刘后尧,万里,黄明军,常移迁,黄志垣,徐飞跃,张百在,赖道进,周海军,区廷安.局部加压压铸技术的开发与应用[J].特种铸造及有色合金,2008(S1):442-446.

Liu Houyao1, Wan Li2, Huang Mingjun1, et al. Development and Application of Die Casting Process with Local Pressurization for Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys (S1):442-446(2008)
[1]刘后尧,万里,黄明军,常移迁,黄志垣,徐飞跃,张百在,赖道进,周海军,区廷安.局部加压压铸技术的开发与应用[J].特种铸造及有色合金,2008(S1):442-446. DOI：

Liu Houyao1, Wan Li2, Huang Mingjun1, et al. Development and Application of Die Casting Process with Local Pressurization for Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys (S1):442-446(2008) DOI：

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。

Abstract

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 tolerance for the pin of d 8mm and 12mm diameter was attached and the life span of the pin was guaranteed. The influence of local pressurization parameters on the inner porosity at the castings was analyzed again. The results showed that bigger pressure from pin

less porosity. The pressurization effect is better when the local pressurization timing is earlier. The ratio of the castings without shrinkage porosity defect is more than 97% after local pressurization was adopted in the plant.