| 镁合金管材大曲率无芯弯曲损伤及壁厚变化研究 |
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| 引用本文： | 苟毓俊,双远华,周研,蔡伟,代佳,毛飞龙,丁小凤,赵春江.镁合金管材大曲率无芯弯曲损伤及壁厚变化研究[J].稀有金属材料与工程,2018,47(8):2422-2428. |
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| 作者姓名： | 苟毓俊 双远华 周研 蔡伟 代佳 毛飞龙 丁小凤 赵春江 |
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| 作者单位： | 太原科技大学 |
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| 基金项目： | 太原科技大学博士启动基金(项目号：20162034)；山西省重点研发计划重点项目(项目号：201603D111005)；山西省重点学科建设经费资助; 国家自然科学(51375325) |
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| 摘 要： | 基于管材弯曲成形机理及Johnson-Cook损伤理论,利用Deform-3D有限元方法分析了AZ31B镁合金管材大曲率无芯弯曲初始弯曲温度、助推速度及助推形式对损伤及管材壁厚变化影响。结果表明:当助推模和压力模对管材施加的作用一定时,初始弯曲温度过低或过高均不利于镁合金管材弯曲成形,最佳初始弯曲温度为350℃,在最佳初始弯曲温度条件下,当助推模与压力模同步运动时,仅能改善一侧壁厚变化程度,无法同时改善弯管整体壁厚变化,内外侧壁厚不均匀度较大;当助推模与压力模不同步时,通过合理匹配助推模与压力模二者之间的轴向速度来改变镁合金管材在进给阶段轴向拉伸或压缩变形程度,使得内外侧壁厚均匀度达到较理想效果;当外助推模和压力模同步,内助推模和以上二者等速反向运动时,内外侧壁厚均匀度最佳,获得综合性能良好的镁合金管材弯曲成形质量。
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| 关 键 词： | AZ31B镁合金管材 大曲率 无芯弯曲 损伤 壁厚变化 |
| 收稿时间： | 2017/8/30 0:00:00 |
| 修稿时间： | 2017/11/15 0:00:00 |
Study on Damage and Wall Thickness Variation with Large Curvature and No-Mandrel Bending Process of Magnesium Alloy Tube |
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| Gou Yujun,Shuang Yuanhu,Zhou Yan,Cai Wei,Dai Ji,Mao Feilong,Ding Xiaofeng and Zhao Chunjiang.Study on Damage and Wall Thickness Variation with Large Curvature and No-Mandrel Bending Process of Magnesium Alloy Tube[J].Rare Metal Materials and Engineering,2018,47(8):2422-2428. |
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| Authors: | Gou Yujun Shuang Yuanhu Zhou Yan Cai Wei Dai Ji Mao Feilong Ding Xiaofeng and Zhao Chunjiang |
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| Affiliation: | Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology |
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| Abstract: | |
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| Keywords: | AZ31B magnesium alloy tube large curvature no-mandrel bending damage wall thickness variation |
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