Energy-efficient multi-pass cutting parameters optimisation for aviation parts in flank milling with deep reinforcement learning. (June 2023)

• Record Type: Journal Article
• Authors: Lu, Fengyi; Zhou, Guanghui; Zhang, Chao; Liu, Yang; Chang, Fengtian; Xiao, Zhongdong
• Is Part Of: Robotics and computer-integrated manufacturing. Volume 81(2023)
• Publication Date: 2023-06
• Subjects: Energy efficiency -- Parametric optimisation -- Workpiece deformation -- Deep reinforcement learning -- Sustainable manufacturing; Robots, Industrial -- Periodicals; Computer integrated manufacturing systems -- Periodicals; Robotics -- Periodicals; Robots industriels -- Périodiques; Productique -- Périodiques; Robotique -- Périodiques; 670.285
• DOI: 10.1016/j.rcim.2022.102488
• Languages: English
• ISSNs: 0736-5845

Abstract

Highlights: An energy-efficient multi-pass parametric optimisation is developed for aero parts An optimisation model is built with a variable workpiece deformation constraint. Deep reinforcement learning is applied to solve the model. It exhibits satisfactory performance in a comparative case study. It provides sustainable practical implications for aerospace industry. Abstract: Cutting parameters play a major role in improving the energy efficiency of the manufacturing industry. As the main processing method for aviation parts, flank milling usually adopts multi-pass constant and conservative cutting parameters to prevent workpiece deformation but degrades energy efficiency. To address the issue, this paper proposes a novel multi-pass parametric optimisation based on deep reinforcement learning (DRL), allowing parameters to vary to boost energy efficiency under the changing deformation limits in each pass. Firstly, it designs a variable workpiece deformation const.raint on the principle of stiffness decreasing along the passes, based on which it constructs an energy-efficient parametric optimisation model, giving suitable decisions that respond to the varying cutting conditions. Secondly, it transforms the model into a Markov Decision Process and Soft Actor Critic is applied as the DRL agent to cope with the dynamics in multi-pass machining. Among them, an artificial neural network-enabled surrogate model is applied to approximate the real-world machining, facilitating enough explorations of DRL. Experimental results show that, compared with the conventional method, the proposed method improves 45.71% of material removal rate and 32.27% of specific cutting energy while meeting deformation tolerance, which substantiates the benefits of the energy-efficient parametric optimisation, significantly contributing to sustainable manufacturing.