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铝合金副车架前铸铝支座铸造工艺研究
Study on the Casting Technology of the Front Cast Aluminum Support of the Aluminum Alloy Subframe
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- DOI:
- 作者:
- 李明杰 邓梅梅 邓宏强 李忠齐 杨小林
LI Mingjie;DENG Meimei;DENG Hongqiang;LI Zhongqi;YANG Xiaolin
- 作者单位:
- 中铁高铁电气装备股份有限公司
China Railway High-speed Railway Electrical Equipment Co.,Ltd.,Baoji 721000,China
- 关键词:
- 薄壁类铸件 热节 网格 浇注系统
thin wall casting hot spot grid pouring system
- 摘要:
- 铝合金副车架前铸铝支座属于薄壁类铸件,为了更好地保证产品质量,确保铸件外观、性能均符合技术要求,本文从铸件结构特性、铸造热节、浇注方案、工艺参数等方面进行工艺研究分析。实践结果表明,通过对前铸铝支座的结构特性分析,利用砂芯成型铸件局部内凹结构,增设网格改善铝液充型能力、增强产品热节部位补缩效果,增加风冷进行局部冷却、优化浇注系统、优化顶杆排布等方法可以很好地提高铝液充型能力、改善铸件局部过热、实现顺序凝固、避免打料变形等问题,极大程度地解决了前铸铝支座铸造缺陷,提高了铸件成品率。
Cast aluminum bearing in front of aluminum alloy subframe belongs to thin-wall castings. In order to better guarantee the product quality and ensure that the appearance and performance of the casting were in line with the technical requirements, the process analysis was carried out from the aspects of casting structure characteristics, casting hot section,casting scheme and process parameters. The results show that by analyzing the structural characteristics of the pre-cast aluminum support, the sand core is used to form the local concave structure of the casting. Grid is added to improve the filling capacity of liquid aluminum and enhance the effect of hot spot retracement. Methods such as increasing air cooling for local cooling, optimizing casting system, optimizing ejector arrangement, etc., it can improve the filling capacity of liquid aluminum, improve the local overheating of castings, realize sequential solidification, and avoid the deformation of castings, which can greatly solve the casting defects of pre-cast aluminum supports and improve the casting yield.