非保温冒口在曲轴铸件上的应用  

Application of Non-insulating Riser on Crankshaft Casting

作　　者：高才炜 刘金林 张园 GAO Cai-wei;LIU Jin-lin;ZHANG Yuan(Shanghai Sandmann Haian Foundry Co.,Ltd.,Nantong 226600,China;Shanghai Sandmann Foundry Co.,Ltd.,Shanghai 201805,China)

机构地区：[1]上海圣德曼铸造海安有限公司,江苏南通226600 [2]上海圣德曼铸造有限公司,上海201805

出　　处：《现代铸铁》2023年第3期5-11,共7页Modern Cast Iron

摘　　要：以某汽车1.2 L曲轴为例,利用MAGMA模拟软件对比分析了使用传统的圆柱形冒口、发热保温冒口以及新型矩形冒口对应铸件缩孔、缩松缺陷情况,模拟结果显示:新型矩形冒口的补缩效果最好,使用新型矩形冒口对应HUB孔位置未形成孤立热节,完全实现顺序凝固和有效补缩。为提高工艺出品率,对新型矩形冒口尺寸进行极限模拟,基于成本和质量平衡点选择合适的冒口大小,最后实现了铸件一次试制交样成功,加快了铸件开发速度,提高了铸件质量,降低了试制成本。Taking 1.2 L automobile crankshaft as an example,using MAGMA simulating software,compared and analyzed shrinkage cavity and porosities situation of castings using traditional cylinder-shaped riser,exothermic riser,and new type rectangle-shaped riser.Simulation result showed:feeding effect of new type rectangle-shaped riser was the best,no isolated thermal spot was formed corresponding to the HUB hole position when using the new type rectangular riser,fully realized the direction solidification and effective feeding.In order to improve the casting method yield,the new rectangular riser size limit was simulated,and the appropriate riser size was selected based on the cost and mass balance points.At last it had realized the successful delivery of casting sample in one trial production,accelerated the development speed of casting,improved the quality of casting,and reduced the trial production cost.

关 键 词：球墨铸铁 曲轴 冒口 缩孔 缩松 

分 类 号：TG255[金属学及工艺—铸造]