| Effect of extrusion wheel angular velocity on continuous extrusion forming process of copper concave bus bar |
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| 作者姓名： | 吴朋越 谢水生 李华清 鄢明 黄国杰 程磊 |
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| 作者单位： | [1]State Key Laboratory for Fabrication and Process of Nonferrous Metals, General Research Institute for Nonferrous Metals, Beijing 100088, China [2]Yunnan Copper Products Ltd, Kunming 650102, China |
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| 摘 要： | The continuous extrusion forming process for producing large section copper concave bus bar under different extrusion wheel angular velocities was studied by three-dimensional finite element technology based on software DEFORM-3D. The rigid-viscoplastic constitutive equation was employed in the model. The numerical simulation results show that the deformation body flow velocity in the die orifice increases gradually with the increase of the extrusion wheel angular velocity. But slippage between the rod and extrusion wheel occurs when the extrusion wheel angular velocity is high. The effective stress near the die orifice enhances gradually with increasing extrusion wheel angular velocity. High stress is concentrated in adjacent regions of the flash gap. The effective strain gradient is greater near the abutment than that near the die orifice. The effective strain of the product increases gradually with increasing extrusion wheel angular velocity. In the deformation process, the deformation body temperature increases remarkably due to friction and deformation. So the cooling is necessary in the region of the die and tools.
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| 关 键 词： | 挤压轮 角速度 凹面铜杆 连续挤压成型 |
| 收稿时间： | 2006-05-31 |
| 修稿时间： | 2006-12-04 |
Effect of extrusion wheel angular velocity on continuous extrusion forming process of copper concave bus bar |
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| WU Peng-yue,XIE Shui-sheng,LI Hua-qing,YAN Ming,HUANG Guo-jie,CHENG Lei.Effect of extrusion wheel angular velocity on continuous extrusion forming process of copper concave bus bar[J].Transactions of Nonferrous Metals Society of China,2007,17(2):280-286. |
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| Authors: | WU Peng-yue XIE Shui-sheng LI Hua-qing YAN Ming HUANG Guo-jie CHENG Lei |
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| Affiliation: | State Key Laboratory for Fabrication and Process of Nonferrous Metals, General Research Institute for Nonferrous Metals, Beijing 100088, China;Yunnan Copper Products Ltd, Kunming 650102, China |
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| Abstract: | The continuous extrusion forming process for producing large section copper concave bus bar under different extrusion wheel angular velocities was studied by three-dimensional finite element technology based on software DEFORM-3D. The rigid-viscoplastic constitutive equation was employed in the model. The numerical simulation results show that the deformation body flow velocity in the die orifice increases gradually with the increase of the extrusion wheel angular velocity. But slippage between the rod and extrusion wheel occurs when the extrusion wheel angular velocity is high. The effective stress near the die orifice enhances gradually with increasing extrusion wheel angular velocity. High stress is concentrated in adjacent regions of the flash gap. The effective strain gradient is greater near the abutment than that near the die orifice. The effective strain of the product increases gradually with increasing extrusion wheel angular velocity. In the deformation process, the deformation body temperature increases remarkably due to friction and deformation. So the cooling is necessary in the region of the die and tools. |
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| Keywords: | copper concave bar continuous extrusion forming extrusion wheel angular velocity finite-element method |
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