Author
Listed:
- Ying Tian
(Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China
School of Mechanical Engineering, Tianjin University, Tianjin 300072, China)
- Zhanxu Gao
(Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China
School of Mechanical Engineering, Tianjin University, Tianjin 300072, China)
- Lei Zhang
(School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China
Tianjin Tianshen Intelligent Equipment Co., Ltd., Tianjin 300300, China)
- Yujing Chen
(Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China
School of Mechanical Engineering, Tianjin University, Tianjin 300072, China)
- Taiyong Wang
(Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China
School of Mechanical Engineering, Tianjin University, Tianjin 300072, China)
Abstract
Traditional energy-saving optimization of shop scheduling often separates the coupling relationship between a single machine and the shop system, which not only limits the potential of energy-saving but also leads to a large deviation between the optimized result and the actual application. In practice, cutting-tool degradation during operation is inevitable, which will not only lead to the increase in actual machining power but also the resulting tool change operation will disrupt the rhythm of production scheduling. Therefore, to make the energy consumption calculation in scheduling optimization more consistent with the actual machining conditions and reduce the impact of tool degradation on the manufacturing shop, this paper constructs an integrated optimization model including a flexible job shop scheduling problem (FJSP), machining power prediction, tool life prediction and energy-saving strategy. First, an exponential function is formulated using actual cutting experiment data under certain machining conditions to express cutting-tool degradation. Utilizing this function, a reasonable cutting-tool change schedule is obtained. A hybrid energy-saving strategy that combines a cutting-tool change with machine tool turn-on/off schedules to reduce the difference between the simulated and actual machining power while optimizing the energy savings is then proposed. Second, a multi-objective optimization model was established to reduce the makespan, total machine tool load, number of times machine tools are turned on/off and cutting tools are changed, and the total energy consumption of the workshop and the fast and elitist multi-objective genetic algorithm (NSGA-II) is used to solve the model. Finally, combined with the workshop production cost evaluation indicator, a practical FJSP example is presented to demonstrate the proposed optimization model. The prediction accuracy of the machining power is more than 93%. The hybrid energy-saving strategy can further reduce the energy consumption of the workshop by 4.44% and the production cost by 2.44% on the basis of saving 93.5% of non-processing energy consumption by the machine on/off energy-saving strategy.
Suggested Citation
Ying Tian & Zhanxu Gao & Lei Zhang & Yujing Chen & Taiyong Wang, 2023.
"A Multi-Objective Optimization Method for Flexible Job Shop Scheduling Considering Cutting-Tool Degradation with Energy-Saving Measures,"
Mathematics, MDPI, vol. 11(2), pages 1-31, January.
Handle:
RePEc:gam:jmathe:v:11:y:2023:i:2:p:324-:d:1028742
Download full text from publisher
References listed on IDEAS
- Rakovitis, Nikolaos & Li, Dan & Zhang, Nan & Li, Jie & Zhang, Liping & Xiao, Xin, 2022.
"Novel approach to energy-efficient flexible job-shop scheduling problems,"
Energy, Elsevier, vol. 238(PB).
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