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Multi-objective optimization of turning process of hardened material for energy efficiency

  • Hong-Seok ParkEmail author
  • Trung-Thanh Nguyen
  • Xuan-Phuong Dang
Article

Abstract

Improving the energy efficiency of machining processes is one way to reduce manufacturing costs in an effort to resolve environmental issues. The objective of this work is to optimize the machining parameters of the turning process for hardened AISI 4140 steel to reduce the consumed cutting energy and improve energy efficiency. The machining parameters evaluated include cutting speed, feed rate, nose radius, edge radius, rake angle, and relief angle. Firstly, numerical simulations were applied in conjunction with the Box- Behnken design (BBD) experimental method and response surface methodology (RSM) to render the relationships of the machining parameters with the specific required cutting energy as well as energy efficiency. Subsequently, a non-dominated sorting genetic algorithm-II (NSGA-II) was used to solve multi-objective optimization problems and search for Pareto optimal solutions. Finally, the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) was adopted to determine the best solution compromised from the Pareto set. The results show that the specific required cutting energy decreased by approximately 16%, and the energy efficiency could be improved by about 11% compared to the non-optimized system. Therefore, this research is intended to contribute toward making machining processes of hardened steels more green and efficient.

Keywords

Process parameters Cutting tool geometry Numerical simulation NSGA-II 

Nomenclature

Uc

Cutting power (W)

Ushear

Shearing power (W)

Ufriction

Friction power (W)

Us

Specific cutting energy (J/mm3)

Ec

Energy efficiency (%)

V

Cutting speed (m/min)

f

Feed rate (mm/rev)

R

Nose radius (mm)

r

Edge radius (µm)

α

Rake angle (deg)

γ

Relief angle (deg)

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Copyright information

© Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Hong-Seok Park
    • 1
    Email author
  • Trung-Thanh Nguyen
    • 2
  • Xuan-Phuong Dang
    • 3
  1. 1.School of Mechanical EngineeringUniversity of UlsanUlsanSouth Korea
  2. 2.Faculty of Mechanical EngineeringLe Quy Don Technical UniversityHanoiVietnam
  3. 3.Faculty of Mechanical EngineeringNha Trang UniversityNha Trang City, Khanh HoaVietnam

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