| 引用本文: | 黄金龙,曾志新,陈举聪,李勇.微小型轴向内沟槽铜管缩径缺陷实验研究[J].材料科学与工艺,2012,20(4):116-120.DOI:10.11951/j.issn.1005-0299.20120422. |
| HUANG Jin-long,ZENG Zhi-xin,CHEN Ju-cong,LI Yong.Forming defects of axial inner micro-grooved copper tubethrough two-split dies rotary swaging process[J].Materials Science and Technology,2012,20(4):116-120.DOI:10.11951/j.issn.1005-0299.20120422. |
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| 摘要: |
| 二分模旋转模锻工艺是微小型轴向内沟槽铜管(AIGCT)的重要缩径工艺.本文通过实验探讨了两种不同截面尺寸类型(分别记作Ⅰ和Ⅱ)和三种不同的材料属性状态(分别记作:A、B和C)下沟槽管缩径缺陷和缩径进给速率的关系.实验结果表明, A状态Ⅰ型管的伸长率最高可达到20%以上,并随着进给速率的增加而减小；当进给速率超过21mm/s时,在A状态Ⅰ型管的成形区将会产生飞边；当进给速率超过13mm/s时,在A状态Ⅱ型管的成形区将产生凹陷.进给速率超过4mm/s和13mm/s时,将分别会在B状态Ⅰ型管和Ⅱ型管的未成形区产生扭曲.由于存在严重的扭曲和压溃,C状态内沟槽铜管不适合用二分模的方式进行缩径. |
| 关键词: 微小型内沟槽铜管 旋转模锻 缺陷 |
| DOI：10.11951/j.issn.1005-0299.20120422 |
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| 基金项目:国家自然科学基金项目(1,6,51175186);广东省自然科学基金项目(S2011010002225);中央高校基本科研业务费专项资金资助(2009ZM0096);广东省重大科技专项项目(2010A9,1B040300020). |
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| Forming defects of axial inner micro-grooved copper tubethrough two-split dies rotary swaging process |
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HUANG Jin-long, ZENG Zhi-xin, CHEN Ju-cong, LI Yong
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School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China
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| Abstract: |
| In this paper,the two-split dies rotary swaging experiments of axial inner micro-grooved copper tube(AIGCT) are carried out to study the relation of forming defects and feeding rate with two types of cross-sections (denoted as Ⅰand Ⅱ) and three material states (denoted as A,B and C) of the tube.The result shows that,the maximum elongation ratio of the A-state AIGCT during rotary swaging may be more than 20%,and it decreases with the increase of feeding rate.It is found that wing can occur on the sizing zone of typeⅠ AIGCT in A-state at the feeding rate of more than 21mm/s,and sinking can occur on the sizing zone of typeⅡ AIGCT in A-state at the feeding rate of more than 13mm/s.When the feeding rate is more than 4mm/s and 13mm/s,twisting will occur on the preform of typeⅠ AIGCT in B-state and typeⅡ AIGCT in B-state respectively.It is not advisable to form AIGCT in C-state through two-split dies rotary swaging process due to its obvious twisting and compression. |
| Key words: axial inner micro-grooved copper tube rotary swaging defect |
