| 楔横轧一次楔大断面收缩率成形机理 |
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| 引用本文： | 贾震,张康生,杨翠苹,胡正寰.楔横轧一次楔大断面收缩率成形机理[J].北京科技大学学报,2009,31(8). |
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| 作者姓名： | 贾震 张康生 杨翠苹 胡正寰 |
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| 作者单位： | 北京科技大学机械工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(No.50575023,50435010);;国家科技支持计划资助项目(No.2006BAF04B03);;高等学校博士学科点专项科研基金资助项目(No.20050008024) |
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| 摘 要： | 为研究大断面收缩率轴类件楔横轧成形问题,做了楔横轧一次楔成形极限实验.发现楔横轧一次楔轴向拉断成形极限可以远大于通常公认的75%界限,实验中成功轧制出断面收缩率为97.7%的超大断面收缩率轧件.推导了轧件轧制接触区轴向合力公式,利用有限元数值模拟方法分析了杆部对称截面轴向应力,揭示出楔横轧一次楔大断面收缩率可以成形的原因,即在适当条件下轧件变形接触区轴向受力接近于平衡,轧件杆部所受轴向拉应力较小所致.
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| 关 键 词： | 楔横轧 大变形 断面收缩率 有限单元法 |
Forming principle of heavy section shrinkage cross wedge rolling by single wedge |
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| JIA Zhen,ZHANG Kang-sheng,YANG Cui-ping,HU Zheng-huan.Forming principle of heavy section shrinkage cross wedge rolling by single wedge[J].Journal of University of Science and Technology Beijing,2009,31(8). |
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| Authors: | JIA Zhen ZHANG Kang-sheng YANG Cui-ping HU Zheng-huan |
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| Abstract: | To study the deformation of heavy section shrinkage cross wedge rolling,experiments with section shrinkages much larger than 75%,which is usually regarded as the section shrinkage limit of single wedge in cross wedge rolling,were done. In the experiments,a work piece whose section shrinkage is 97.7% was successfully rolled. A formula of resultant axial force on the contact zone of the work piece was deduced. Axial stress in the symmetrical section of the rod part was analyzed by the three-dimensional finite... |
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| Keywords: | cross wedge rolling large deformation area reduction finite element method |
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