| Effect of mandrel on cross section quality of thin-walled tube numerical controlled bending |
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| 作者姓名： | 谷瑞杰 杨合 詹梅 李恒 王光祥 |
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| 作者单位： | College of Materials Science and Engineering, Northwestern Polytechnical University, Xi＇an 710072, China |
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| 基金项目： | 国家杰出青年科学基金，中国科学院资助项目，高等学校优秀青年教师教学科研奖励计划，中国航空科学基金，高等学校博士学科点专项科研项目，西北工业大学校科研和教改项目 |
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| 摘 要： | The effect of mandrel with the structure of ball and socket on the cross section quality of thin-walled tube numerical controlled （NC） bending was studied by numerical simulation method, combined with theoretical analysis and experiment. Influencing factors of the mandrel include the count of mandrel heads, the diameter of mandrel and its position. According to the principle of NC tube bending, quality defects possibly produced in thinwalled tube NC bending process were analyzed and two parameters were proposed in order to describe the cross section quality of thin-walled tube NC bending. According to the geometrical dimension of tube and dies, the range of mandrel protrusion was derived. The finite element model of thin-walled tube NC bending was established based on the DYNAFORM platform, and key technological problems were solved. The model was verified by experiment. The effect of the number of mandrel heads, the diameter of mandrel and the protrusion length of mandrel on the cross section quality of thin-walled tube NC bending was revealed and how to choose mandrel parameters was presented.
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| 关 键 词： | 芯棒 数控弯曲 薄壁管 横截面质量 |
| 文章编号： | 1003-6326（2005）06-1264-11 |
| 收稿时间： | 2005-03-07 |
| 修稿时间： | 2005-06-02 |
Effect of mandrel on cross section quality of thin-walled tube numerical controlled bending |
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| GU Rui-jie,YANG He,ZHAN Mei,LI Heng,WANG Guang-xiang.Effect of mandrel on cross section quality of thin-walled tube numerical controlled bending[J].Transactions of Nonferrous Metals Society of China,2005,15(6):1264-1274. |
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| Authors: | GU Rui-jie YANG He ZHAN Mei LI Heng WANG Guang-xiang |
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| Abstract: | The effect of mandrel with the structure of ball and socket on the cross section quality of thin-walled tube numerical controlled(NC) bending was studied by numerical simulation method, combined with theoretical analysis and experiment. Influencing factors of the mandrel include the count of mandrel heads, the diameter of mandrel and its position. According to the principle of NC tube bending, quality defects possibly produced in thin-walled tube NC bending process were analyzed and two parameters were proposed in order to describe the cross section quality of thin-walled tube NC bending. According to the geometrical dimension of tube and dies, the range of mandrel protrusion was derived. The finite element model of thin-walled tube NC bending was established based on the DYNAFORM platform, and key technological problems were solved. The model was verified by experiment. The effect of the number of mandrel heads, the diameter of mandrel and the protrusion length of mandrel on the cross section quality of thin-walled tube NC bending was revealed and how to choose mandrel parameters was presented. |
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| Keywords: | thin-walled tube numerical controlled(NC) tube bending mandrel cross section quality simulation |
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