| Convergence Analysis of the Numerical Solution for Cathode Design of Aero-engine Blades in Electrochemical Machining |
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| 作者姓名： | Li Zhiyong Niu Zongwei |
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| 作者单位： | School of Mechanical Engineering, Shandong University of Technology, Zibo 255091, China |
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| 基金项目： | Foundation item： Foundation of the Chinese People＇s Liberation Army General Armament Department （41318.3.2.4） |
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| 摘 要： | As a main difficult problem encountered in electrochemical machining （ECM）, the cathode design is tackled, at present, with various numerical analysis methods such as finite difference, finite element and boundary element methods. Among them, the finite element method presents more flexibility to deal with the irregularly shaped workpieces. However, it is very difficult to ensure the convergence of finite element numerical approach. This paper proposes an accurate model and a finite element numerical approach of cathode design based on the potential distribution in inter-electrode gap. In order to ensure the convergence of finite element numerical approach and increase the accuracy in cathode design, the cathode shape should be iterated to eliminate the design errors in computational process. Several experiments are conducted to verify the machining accuracy of the designed cathode. The experimental results have proven perfect convergence and good computing accuracy of the proposed finite element numerical approach by the high surface quality and dimensional accuracy of the machined blades.
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| 关 键 词： | 电化学 机械加工 发动机 阴极设计 飞机 |
| 收稿时间： | 2007-09-25 |
| 修稿时间： | 2007-10-19 |
Convergence Analysis of the Numerical Solution for Cathode Design of Aero-engine Blades in Electrochemical Machining |
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| Li Zhiyong Niu Zongwei.Convergence Analysis of the Numerical Solution for Cathode Design of Aero-engine Blades in Electrochemical Machining[J].Chinese Journal of Aeronautics,2007,20(6):570-576. |
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| Authors: | Li Niu Zongwei |
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| Institution: | aSchool of Mechanical Engineering, Shandong University of Technology, Zibo 255091, China |
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| Abstract: | As a main difficult problem encountered in electrochemical machining (ECM), the cathode design is tackled, at present, with various numerical analysis methods such as finite difference, finite element and boundary element methods. Among them, the finite element method presents more flexibility to deal with the irregularly shaped workpieces. However, it is very difficult to ensure the convergence of finite element numerical approach. This paper proposes an accurate model and a finite element numerical approach of cathode design based on the potential distribution in inter-electrode gap. In order to ensure the convergence of finite element numerical approach and increase the accuracy in cathode design, the cathode shape should be iterated to eliminate the design errors in computational process. Several experiments are conducted to verify the macbining accuracy of the designed cathode. The experimental results have proven perfect convergence and good computing accuracy of the proposed finite element numerical approach by the high surface quality and dimensional accuracy of the machined blades. |
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| Keywords: | electrochemical machining aero-engine blade cathode design convergence analysis Electrochemical Machining Blades Cathode Design Numerical Solution Analysis experimental results perfect good computing high surface quality blades experiments verify cathode shape design errors computational |
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