| 粉体压制过程密度变化机理及影响因素模拟分析 |
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| 引用本文： | 蒋卿,李云,焦明华,王兵,吴玉程.粉体压制过程密度变化机理及影响因素模拟分析[J].热加工工艺,2010,39(7). |
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| 作者姓名： | 蒋卿 李云 焦明华 王兵 吴玉程 |
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| 作者单位： | 1. 合肥工业大学材料科学与工程学院,安徽,合肥,230009
2. 合肥工业大学摩擦学研究所,安徽,合肥,230009 |
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| 基金项目： | 安徽省"十五"科技攻关项目，合肥市重点科技攻关项目 |
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| 摘 要： | 采用MSC.MARC有限元模拟软件对轴套粉体压制成形过程中粉末的位移走向和粉末位移对生坯相对密度的影响进行研究。同时,研究了不同模壁润滑条件以及不同厚度高度比对生坯密度分布的影响。结果表明,粉体成形过程中模壁摩擦导致的位移滞后效应决定了生坯最终的相对密度分布状况;粉末的位移变化规律与生坯的密度分布相似。随着模壁润滑条件的改善和高度厚度比的增加,生坯的密度分布均匀性得到提高;尤其是采用特殊润滑时,生坯密度均匀性得到了明显的改善。这些为研究粉体压制致密化过程提供了理论参考依据。
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| 关 键 词： | 粉末 压制 数值模拟 位移滞后效应 相对密度 |
Analysis on Numerical Simulation of Density Change Mechanism and Influencing Factors in Powder Compacting Process |
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| JIANG Qing,LI Yun,JIAO Minghua,WANG Bing,WU Yucheng.Analysis on Numerical Simulation of Density Change Mechanism and Influencing Factors in Powder Compacting Process[J].Hot Working Technology,2010,39(7). |
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| Authors: | JIANG Qing LI Yun JIAO Minghua WANG Bing WU Yucheng |
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| Affiliation: | JIANG Qing1,LI Yun1,JIAO Minghua2,WANG Bing1,WU Yucheng1(1.College of Materials Science , Engineering,Hefei University of Technology,Hefei 230009,China,2.Institute of Tribology,China) |
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| Abstract: | The displacement direction of powder and the influence of powder's displacement on the green compact's relative density of shaft sleeve powder in the compacting process were simulated by MSC.MARC FEM analysis software.In the mean time,the influences of different lubrication condition of the die wall and different thickness-to-height ratio on the distribution of green compact's relative density were also studied.The results show that the relative density distribution of the green compact is determined by the... |
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| Keywords: | powder compact numerical simulation displacement lag effect relative density |
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