Human-robot collaborative maximizes the respective strengths of humans and robots, driving profound transformations in green intelligent manufacturing and supporting efficient completion of diverse disassembly tasks in remanufacturing. However, existing studies mainly focus on single End-of-Life (EOL) product scenarios. With the increasing variety and volume of EOL products, traditional single-line layouts and disassembly modes struggle to meet the demands of large-scale, multi-type product disassembly. To address this, this paper proposes a human-robot collaborative parallel two-sided destructive disassembly line balancing problem (HRC-PTDDLBP) for multi-product, multi-line scenarios. Firstly, a mixed-integer linear programming model is established for HRC-PTDDLBP to minimize weighted workstation count, smoothness index, and safety risk. To effectively derive the Pareto-optimal solutions, an improved Augmented ε-Constraint method (AUGMECON-2) is developed, which introduces slack variables and adaptive ε-step parameters to enhance convergence stability and solution diversity while avoiding weakly Pareto-optimal points. Secondly, an improved multi-objective discrete water wave optimization algorithm is developed for efficient model solving. The algorithm constructs the initial population based on task priorities and component non-disassemblability, incorporates a decoding strategy considering direction and task attribute conflicts, and enhances search performance through refined crossover, local search, and restart strategies. The model and algorithm correctness are validated within the GUROBI commercial solver’s scope. Benchmarking against seven state-of-the-art multi-objective algorithms under two-sided, human-robot non-destructive, and destructive disassembly modes, the proposed approach demonstrates superior performance. Finally, application to disassembly cases of discarded printers and televisions further validates the method. Compared with the second-best algorithm, the smoothness index is reduced by 87.0%, and safety risk is improved by 20.22%, alongside significant gains in line length reduction and idle time minimization. These results illustrate the comprehensive advantages of the proposed method in multi-product, multi-line human-robot collaborative disassembly line balancing, offering a practical and adaptable solution for real-world disassembly systems.
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