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| Optimization of Electrochemical Machining Process of Blade Based on DOE Design |
| ZHAI Lulu, LIU Haibo, HUAN Heng |
| (AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang 110043, China) |
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Abstract For the electrochemical machining of super-alloy blades with complex curved surface, the requirements of high precision for the size and shape of inlet and exhaust sides should be met. The process parameters of blank thickness, margin, electrolyte conductivity and voltage have important effects on the machining accuracy of the front and rear edges. In order to find out the four main process parameters on the influence law of machining accuracy and machining time, the processing surface and processing time of a compressor were studied. In this paper, DOE test design was used to optimize the electrochemical machining process of the blade, eight samples were designed by using partial factors, and the performance of all samples was compared and analyzed by using Minitab software. The results show that the main parameters affecting the machining accuracy of the front and rear edges of the blade are blank thickness, margin and electrolyte conductivity. The main parameters that affect the processing time are blank thickness, electrolyte conductivity and voltage. After optimization, the process parameters were blank thickness 10mm, margin 0.99mm, electrolyte conductivity 134.7mS/cm2 , voltage 20V, respectively. The precision of the front and rear edges obtained under this parameter is stable at 0.06mm, and the processing time is stable at 20min.
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2021, 
