Combined rough and finish machining of Ti–6Al–4V alloy by electrochemical mill-grinding |
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Authors: | Shen Niu Xiaokang Yue Gangqiang Liu Hansong Li |
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Affiliation: | 1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China;2. Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing, China |
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Abstract: | AbstractThis study proposes a combined method for the electrochemical mill-grinding of Ti–6Al–4V alloy to achieve a high material removal rate, high machining accuracy and good surface quality based on rough and finish machining. In the rough machining stage, a maximum feed rate of 2.7?mm min?1 and a material removal rate of 248.3?mm3 min?1 were achieved experimentally at a 10?mm cut depth using an abrasive tool with five rows of tool-sidewall outlet holes. In the finish machining stage, there were almost no overcuts or stray corrosions produced. The sidewall surface roughness and sidewall flatness were Ra = 1.06 and 76.8?μm after the finishing stage, which represent a 68% and 79.2% improvement compared with the rough machining stage, respectively. Finally, we fabricated a 1-mm-thick thin-walled structure using the combined machining operations, in which approximately 96% of the total material removal volume was performed at the rough machining stage. |
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Keywords: | Electrochemical mill-grinding flatness material removal rate surface roughness thin-walled structure Ti–6Al–4V alloy |
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