Abstract
Partial destructive disassembly (PDD) is essential for end-of-life products to improve their automatic disassembly efficiency and reduce disassembly cost. A feasibility evaluation of the PDD is the key step to evaluate whether the PDD can be implemented. However, it has not been studied previously to our knowledge. To deal with this problem, a multi-granularity feasibility evaluation method is proposed. A multi-granularity feasibility evaluation model of the PDD was constructed based on the complex product’s hierarchical structure, which not only described the evaluation indices from the product level to the component level but also presented methods and rules to quantify them. Thus, disassembly entropy was introduced into the target group’s coarse granularity evaluation. The feasibility of the fine-grained index of the PDD for the component layer was constructed based on the product’s failure characteristic. The fine-grained index was calculated by the fuzzy trigonometric function, and its weighting was obtained based on the structure entropy weight method. Thus, the results of the evaluation were used as feedback to guide the PDD process. Finally, a Passat engine case study illustrates the feasibility and effectiveness of the method.
Highlights
Remanufacturing is an effective method to recover and reuse the residual value of end-of-life (EOL) products [1]
This paper proposes a multi-granularity feasibility evaluation method for EOL products to judge the partial destructive disassembly (PDD) feasibility from the product level to the component level based on the disassembly entropies and the product’s failure characteristic
If the total disassembly entropy of the target group is greater than the user-defined threshold, the following fine-grained evaluation is unnecessary, which reduces the blindness of the evaluation and improves the evaluation efficiency
Summary
Remanufacturing is an effective method to recover and reuse the residual value of end-of-life (EOL) products [1]. A reasonable remanufacturing disassembly mode can improve the mass disassembly efficiency and reduce the remanufacturing cost. PDD aims to achieve the unconventional disassembly of some connectors or low-value components by destructive means. The separation of components is realized by cutting a certain connector, which is mainly applied to non-detachable connections, such as riveting and welding [7]. The parallel partial destructive disassembly has important research significance for improving the remanufacturing disassembly efficiency. PDD is an effective and efficient disassembly mode, which is essential for the automatic disassembly system to perform batch disassembly. It is known that the remanufacturing core often has un-disassembly connections (e.g., riveting or welding) and a structure with severe failures (e.g., corrosion or fractures). Owing to the limitations of cost, demolition time, and environment, the feasibility of the partial destructive disassembly becomes an important problem to be solved
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