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Investigation on MRR and Machining Gap of Micro Reciprocated Wire-EDM for SKD11

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Abstract

In this paper, the investigational work is carried out on the micro reciprocated wire electrical discharge machining (wire-EDM) of SKD11 using circularly travelled wire with Φ30 μm as tool electrode, aiming to achieve the fabrication of micro parts with high cost-effect, efficiency and precision. The experiments are systematically performed using central composite design approach of response surface methodology to study the effect of open voltage, discharge capacitance, pulse duration and feed rate on material removal rate (MRR) and machining gap. The mathematical models of MRR and machining gap are developed by analysis of variance, and whilst verified by confirmation experiments with ≤ 8.38% and 6.70% prediction errors for MRR and machining gap, respectively. Besides, multi-objective optimization of parameter combinations is attempted by non-dominated sorting genetic algorithm-II. Finally, a typical experimental sample, micro gear is successfully machined with 1194.38 μm tip diameter under the condition of No. 14 optimal solution.

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Abbreviations

U :

Open voltage

C :

Discharge capacitance

T on :

Pulse duration

F :

Feed rate

T off :

Pulse interval

R :

Discharge resistance

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Acknowledgements

This research work is funded by National Natural Science Foundation of China (Grant No. 51675132); Major Project of Applied Technology Research and Development Plan of Heilongjiang Province (Grant No. GA16A404); and National Natural Science Foundation of China (Grant No. 51521003).

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Authors and Affiliations

  1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Xiang Chen, Zhenlong Wang, Yukui Wang & Guanxin Chi

  2. Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin, 150001, China

    Zhenlong Wang & Yukui Wang

Authors
  1. Xiang Chen
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  2. Zhenlong Wang
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  3. Yukui Wang
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  4. Guanxin Chi
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Correspondence to Yukui Wang.

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Chen, X., Wang, Z., Wang, Y. et al. Investigation on MRR and Machining Gap of Micro Reciprocated Wire-EDM for SKD11. Int. J. Precis. Eng. Manuf. 21, 11–22 (2020). https://doi.org/10.1007/s12541-019-00233-7

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  • DOI: https://doi.org/10.1007/s12541-019-00233-7

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