铝合金缸盖皮下气孔的分析与解决.pdfVIP

学兔兔 铝合金缸盖皮下气孑L的分析与解决 易 长，严 烯，陈俊星 (柳州五菱柳机动力有限公司，广西 柳州545005) 摘要：为探寻重力铸造铝合金缸盖皮下气孔缺陷发生的原因，利用质量分析法和模流软件，结 合现场生产实际情况，从人、机、料、法、环等方面分析了缸盖皮下气孔缺陷的影响因素，明 确了模具排气通道不够及未设置主动抽气装置、砂芯吸潮是主要影响因素，提出了针对性的预 防措施，并增设了缸盖毛坯皮下气孔检测仪器，从而使铝合金缸盖皮下气孔缺陷得到了有效控 制。 关键词：铝合金缸盖；皮下气孔；影响因素 中图分类号：TG245 文献标识码：B 文章编号：1673—3320(201 3)05—0035—03 Analysis and Solutions for Subsurface Blowhole of Aluminum Alloy Cylinder Head Yi Chang，Yah Xi，Chen Junxing (Liuzhou Wuling Motors Co．，Ltd．，Liuzhou 545005，Guangxi，China) Abstract：To explore the reasons for subsurface blowhole of aluminum alloy cylinder head by gravity casting．the quality method and mold flow software combined with the actual production situation was used to analyze the influencing factors for subsurface blowhole of cylinder head from the aspects of personnel，machine，material，method and surroundings．The main influencing factors were insufficient exhaust passage and lack of active air extractor in metal mold and moisture absorotion of sand cores．The corresponding prevention measures were put forward，and the instrument to test subsurface blowhole in the cylinder head blank was set up．Thus the subsurface blowhole of aluminum alloy cylinder head iS controlled effectively． Kev words：aluminum alloy cylinder head；subsurface blowhole；influencing factor 五菱柳机采用金属型重力铸造工艺浇注生产 1 A型缸盖铸造过程 铝合金缸盖。2012年间，某型缸盖毛坯 (简称A 汽车铝合金A型缸盖采用成熟的金属型重力 型缸盖)在产量提升过程中，皮下气孔质量问题 铸造工艺生产。该工艺过程成本低，适应性广， 逐渐显现。该皮下气孔缺陷存在明显的特征【lj： 质量稳定性好，适合大批量铸件生产。其主要工 1)缸盖毛坯表面没有明显的异