| Mechanical Engineering |
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| Multi-dimensional hierarchical remanufacturability evaluation method for end-of-life mechanical parts |
Xiu-fen ZHANG1,2,3( ),Yun-fei GAO1 |
1. College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
2. College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
3. Canny Elevator Co. Ltd, Suzhou 215213, China |
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Abstract A multi-dimensional hierarchical remanufacturability evaluation model and method was proposed to solve the problems of ignoring the influence of recycling, selling, policy environment and social environment as well as the complexity and coupling caused by multiple indexes in existing remanufacturability evaluation methods. By analyzing the task flow of end-of-life product remanufacturing system, 22 influence factors were extracted, and then a multi-dimensional hierarchical remanufacturing evaluation model was constructed with technology, economy and environment as key efficiency indexes. An index quantification method based on expert fuzzy evaluation method was proposed to simplify the difficulty of index quantification. The index weight was calculated by using the structural entropy weight method, in order to take both subjective and objective factors into account, and sensitivity analysis was carried out by using OAT (One-At-a-Time) method. A piecewise hierarchical comprehensive remanufacturability evaluation method of end-of-life mechanical parts was proposed based on piecewise weighted rank sum ratio, in order to overcome the complexity and coupling problems caused by multiple indexes. The case study of the main parts of the Passat B5 engine such as cylinder block, cylinder head, crankshaft, connecting rod, shows that the remanufacturability of connecting rod is the best and that of cylinder head is the worst, which verifies the effectiveness and feasibility of the proposed method.
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Received: 09 April 2019
Published: 05 May 2020
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退役机械零部件多维递阶再制造性评价方法
针对再制造性评价忽略回收环节、出售环节、政策环境、社会环境等影响及其多指标造成的复杂性和耦合性的问题，提出多维递阶再制造性评价模型和方法. 通过分析退役机械零部件再制造系统任务流，提取22个影响因子，以技术、经济和环境为关键效能指标体系构建退役机械零部件多维递阶再制造性评估模型. 针对指标难以量化的问题，提出基于模糊评价法的指标量化方法，利用结构熵权法计算指标权重，以兼顾主客观性，并应用OAT法进行敏感性分析. 提出基于分段加权秩和比法的退役机械零部件再制造性分段递阶综合评价法以克服多指标造成的复杂性和耦合性问题. 以帕萨特B5发动机为例，对汽缸体、缸盖、曲轴、连杆等主要零部件进行再制造性优劣排序和分档，结果显示连杆的再制造性最佳，缸盖的再制造性最差，与实际分析结果基本一致，验证了所提方法的有效性和可行性.
关键词：
退役机械零部件,
再制造性,
评价,
秩和比,
敏感性分析
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