摘要
这里分析了飞轮的结构特征、原有铸造工艺凝固与残余熔体表面积特征;开展了飞轮结构的局部优化;并研究了浇注温度、充型速度、浇口半径、冒口参数的对铸造质量的影响;给出了将飞轮壁厚由10mm调整为13mm以及将浇铸温度提升至1440℃能改善熔腔内金属凝固顺序,且能显著减少凝固过程中孤立液态金属区面积;揭示了充型时间及凝固时间与4种不同充型速度成反比关系。指出了在20cm/s与30cm/s的充型速度下,不同浇口半径下其凝固时间相差较小,充型时间随充型速度增加而减小,但凝固时间却反而大特征。研究结论表明:在浇铸温度1440℃,充型速度30cm/s,浇口半径为20mm、冒口直径60mm工艺情况下,能有效提升飞轮的铸造质量,极大减少飞轮铸造过程的废品率。
The structural characteristics of flywheel,the solidification of original casting process and the surface characteristics of residual melt are analyzed.And the research on local optimization of flywheel structure is carried out.The effects of pouring temperature,mold filling speed,gate radius and riser parameters on casting quality were investigated;which is shown that adjusting the flywheel wall thickness from 10mm to 13mm and raising the casting temperature to 1440℃can improve the solidification sequence of metal in the molten cavity and significantly reduce the area of isolated liquid metal during solidification.Meanwhile,it is revealed that the filling time and solidification time are inversely proportional for four different filling speeds.It is pointed out that at the filling speed of 20cm/s and 30cm/s,the difference of solidification time under different gate radius is small,and the filling time decreases with the increase of filling speed,but the solidification time is large.The results show that under the conditions of casting temperature 1440℃,mold filling speed 30cm/s,gate radius 20mm and riser diameter 60mm,the casting quality of flywheel can be effectively improved and the scrap rate of flywheel casting process can be greatly reduced.
作者
陈淑侠
田乾
吴朝阳
谢占山
CHEN Shuxia;TIAN Qian;WU Zhaoyang;XIE Zhanshan(School of Mechanical Engineering,Nantong Vocational University,Jiangsu Nantong 226007,China;Nantong University,Jiangsu Nantong 226019,China)
出处
《机械设计与制造》
北大核心
2025年第12期194-199,共6页
Machinery Design & Manufacture
基金
国家重点研发计划政府间国际科技创新合作重点专项—柴油机废气排放净化与余热利用技术研究及示范(2017YFE0116100)。
关键词
飞轮
浇注温度
铸造
充型速度
残余熔体表面积
Flywheel
Pouring Temperature
Casting
Mold Filling Speed
Residual Melt Surface Area
