面向再制造的逆向物流产品回收预测研究

在对再制造逆向物流网络系统构建的基础上,对系统中存在的不确定性因素进行分析。以产品回收数量预测为研究对象,利用灰色模型建立产品回收数量预测模型,并进行实例计算。结果表明该模型计算精度高,所需数据量少,有良好的应用性。     

Remanufacturability and Assessment Method

WITH the development of surface engineering andlaws on environment protect,lots of companies have toconsider reclaim of the used products.In practice,theyrealized if the products adopt design forremanufacturing,the benefit of remanufacturing wouldbe increased obviously'1'.Some researcher haveentered into remanufacturability field and built relativeevaluating methods'2'.Based on researching resultabout design for remanufacturing,some concepts,remanufacturability system and assessment method ar…     

Joint decision of product configuration and remanufacturing for product family design

Product family design (PFD) is a popular method for increasing product variety to satisfy the needs of diversified markets. With the increasing concern for environmental friendliness in society, more and more companies develop launching remanufactured products and include them in their product families. Therefore, PFD should be considered in a broad decision space where configuration of product variants and remanufacturing are considered simultaneously. However, this issue was not addressed properly in previous research. In this paper, a methodology for joint decision of product configuration and remanufacturing is proposed in which a bi-objective mixed integer programming model is formulated to determine the configurations of both new and remanufactured products for minimising product cost, maximising total market share, and satisfying reliability requirements. Then, Non-dominated Sorting Genetic Algorithm II (NSGAII) is adopted to solve the optimization problem. Computational experiments were conducted and their results show that NSGAII is convergent to the model well. A case study is presented to illustrate the applicability and effectiveness of the proposed methodology.     

发动机再制造技术的探讨

发动机再制造是废旧发动机回收利用的最佳形式,能够最大限度地保留附加值,减少能源消耗和环境污染.介绍了再制造工程和发动机再制造的概念,针对发动机再制造技术的工艺流程、质量保证体系、废旧发动机零件的失效分析和寿命预测,阐述了发动机再制造的应用价值以及国内外发展现状,最后对我国实施发动机再制造工程提出了一些建议.     

Remanufacturing system based on totally automatic MIG surfacing via robot

Remanufacturing system is a term of green system project which conforms to the national sustainable development strategy. With the demand of the high adaptability of the varieties of waste machining parts, the short product cycle, the low machining cost and the high product quality are offered. Each step of the remanufacturing system from the beginning of the scanning to the accomplishment of the welding was investigted. Aiming at building a remanufacturing system based on totally automatic MIG surfacing via robot, advanced information technology, remanufacturing technology and management, through the control of the pretreatment and the optimization to minimize the time of remanufacturing and realize the remanufacturing on the terminal products of varieties, were applied. The steps mainly include: 1) using the visual sensor which is installed at the end of the Robot to rapidly get the outline data of the machining part and the pretreatment of the data; 2) rebuilding the curved surface based on the outline data and the integrated CAD material object model; 3) building the remanufacturing model based on the CAD material object model and projecting the remanufacturing process; and 4) accomplishing the remanufacture of the machining part by the technology of MIG surfacing.     

Design for life-cycle profit with simultaneous consideration of initial manufacturing and end-of-life remanufacturing

Remanufacturing is emerging as a promising solution for achieving green, profitable businesses. This article considers a manufacturer that produces new products and also remanufactured versions of the new products that become available at the end of their life cycle. For such a manufacturer, design decisions at the initial design stage determine both the current profit from manufacturing and future profit from remanufacturing. To maximize the total profit, design decisions must carefully consider both ends of product life cycle, i.e. manufacturing and end-of-life stages. This article proposes a decision-support model for the life-cycle design using mixed-integer nonlinear programming. With an aim to maximize the total life-cycle profit, the proposed model searches for an (at least locally) optimal product design (i.e. design specifications and the selling price) for the new and remanufactured products. It optimizes both the initial design and design upgrades at the end-of-life stage and also provides corresponding production strategies, including production quantities and take-back rate. The model is extended to a multi-objective model that maximizes both economic profit and environmental-impact saving. To illustrate, the developed model is demonstrated with an example of a desktop computer.     

机电产品绿色再制造综合评价模型及应用

为有效评估废旧机电产品的可再制造度,支撑废旧机电产品绿色再设计和再制造方案的形成,结合绿色制造技术、质量、经济、资源、环境(TQCRE)五大决策属性,通过对影响废旧机电产品再制造的技术、经济、质量、资源、环境和时间等因素进行分析,建立了废旧机电产品绿色再制造综合评价指标体系及其框架流程.通过定性和定量相结合、模糊综合评价等方法,建立了绿色再制造综合评价模型,并通过一个实例验证该模型的可行性和实用性.     

考虑疲劳损伤的支撑辊主动再制造时机决策方法

针对轧辊再制造毛坯质量不确定导致其再制造前后性能不确定的问题,以支撑辊为对象,提出了考虑疲劳损伤的主动再制造时机决策方法.结合现有轧辊修磨技术,基于磨损和疲劳裂纹之间的耦合关系确定修磨量大小,研究了多次修磨对疲劳强度的影响;应用改进的非线性连续损伤理论,建立了支撑辊主动再制造时机决策模型;最后,对某四辊轧机中的支撑辊进...     

[机械装备再制造]绿色增材再制造技术

绿色增材再制造技术在中国已进入了新的发展阶段。探讨了绿色增材再制造技术的内涵与特征,分析了发展绿色增材再制造技术面临的机遇与挑战,提出了绿色增材再制造技术未来的主攻方向。推行绿色增材再制造技术,构建绿色增材再制造技术体系,不仅有利于实现资源环境的可持续发展,也契合《中国制造2025》提出的全面推进绿色制造的战略重点。     

[机械装备再制造]考虑失效特征的废旧零部件再制造成本预测模型研究

分析了废旧零部件失效特征对其再制造成本的影响,建立了一种基于失效特征的废旧零部件再制造成本预测模型,该模型将半监督学习与最小二乘支持向量机回归（LS-SVR）算法相结合,实现了在只有少量已完成再制造的废旧零部件样本和大量未知再制造成本的零部件样本的条件下,对废旧零件再制造成本的预测。该算法加入了k最近邻(kNN)算法,以kNN为辅、LS-SVR为主对未标记的样本进行置信度评估,将各阶段最优未标记样本逐步添加进有标记的样本集中,逐步更新预测模型,能够有效降低噪声,提高模型精度。经案例验证,提出的算法具有良好的回归预测能力和泛化能力。