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首页> 外文会议>IEEE International Conference on Mechatronics and Automation; 20060625-28; Luouang(CN) >Numerical Solution for Cathode Design of Aero-engine Blades in Electrochemical Machining
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Numerical Solution for Cathode Design of Aero-engine Blades in Electrochemical Machining

机译：航空发动机叶片电化学加工阴极设计的数值解

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摘要

electrochemical machining (ECM) is one of the most vital produce methods of aero-engine blades due to the high efficiency and surface quality, stress free and no tool loss. However, the main difficulties encountered with ECM are tool cathode design problem. To solve the problem, an accurate model and numerical approach based on the potential distribution in inter-electrode gap is proposed in this paper. This numerical approach can determinate the electric field in inter-electrode gap and find a cathode (tool) shape which will satisfy the Laplace equation for potential distribution and all other boundary conditions to achieve the desired blade shape. In addition, the influence of passive electrolyte on the cathode design in ECM process is also investigated. The proposed approach does not require iterative redesign process and has excellent convergence and computing accuracy. In order to verify the machining accuracy of the designed cathode, the experiments have been conducted using an industrial scale electrochemical machining system. The experimental results demonstrate that the machined blade samples have high surface quality and dimensional accuracy which proves the proposed approach for cathode design of aero-engine blades in ECM is applicable and valuable.
机译：电化学加工（ECM）由于其高效率和表面质量，无应力且无工具损耗，是航空发动机叶片最重要的生产方法之一。但是，ECM遇到的主要困难是工具阴极设计问题。为解决这一问题，本文提出了一种基于电极间间隙中电位分布的精确模型和数值方法。这种数值方法可以确定电极间间隙中的电场，并找到一个阴极（工具）形状，该形状将满足拉普拉斯方程的电势分布和所有其他边界条件，从而获得所需的叶片形状。此外，还研究了被动电解质对ECM工艺中阴极设计的影响。所提出的方法不需要迭代的重新设计过程，并且具有出色的收敛性和计算精度。为了验证设计的阴极的加工精度，已经使用工业规模的电化学加工系统进行了实验。实验结果表明，经机加工的叶片样品具有较高的表面质量和尺寸精度，这证明了在ECM中提出的航空发动机叶片阴极设计方法是可行的并且有价值的。

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