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Experimental research on improving accuracy of electrochemical machining of deep narrow grooves

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Abstract

Deep narrow metal grooves have wide application prospects in the field of aeronautics and astronautics. Electrochemical machining (ECM) has a unique advantage in the fabrication of deep narrow grooves due to its advantages of no cutting heat, no cutting force, and high machining efficiency. But, there is significant stray current corrosion in the side wall of the deep narrow groove, which restricts the enhancement of the processing accuracy. In the interest of improving the processing accuracy of the deep narrow groove, the effects of compound feed and matching of pulse and oscillation (MOPAO) on the average current density distribution of the deep narrow groove side wall were studied based on finite element analysis (FEA) of the electrostatic field. The finite element simulation results show that the homogeneity of the deep narrow groove could be significantly improved with the increment of the oscillation amplitude, and the processing accuracy could be improved by prolonging the pulse turn-off time. Moreover, contrast experiments on the deep narrow groove ECM were carried out based on a self-developed ECM system. The experimental results indicate that the matching of pulse and oscillation can remarkably improve the processing accuracy, and smaller average groove width and better groove width uniformity can be obtained in comparison with the compound feed. Moreover, the maximum groove width is 2.78 mm, the minimum groove width is 2.73 mm, the length-width ratio reaches 11:1, and the depth-width ratio reaches 9:1 using the machining mode of MOPAO.

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Acknowledgements

The authors would like to acknowledge the support of this research by National Natural Science Foundation of China (Grant No. 51475235), Natural Science Foundation of Jiangsu Province (Grant No. BK20161193), and Funding for Outstanding Doctoral Dissertation in NUAA (Grant No. BCXJ16-05).

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Authors and Affiliations

  1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Wang Feng, Zhao Jianshe, Lv Yanming, Yang Zhenwen & Tian Zongjun

  2. School of Mechanical and Vehicle Engineering, Changzhou Institute of Technology, Changzhou, 213002, China

    He Yafeng

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  1. Wang Feng
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  2. Zhao Jianshe
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  3. Lv Yanming
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  4. Yang Zhenwen
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Correspondence to Wang Feng.

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Feng, W., Jianshe, Z., Yanming, L. et al. Experimental research on improving accuracy of electrochemical machining of deep narrow grooves. Int J Adv Manuf Technol 96, 3217–3225 (2018). https://doi.org/10.1007/s00170-018-1700-z

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  • DOI: https://doi.org/10.1007/s00170-018-1700-z

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