Study On Manufacturability In Optimal Recovery Period For In Service Of Construction Machinery Based On Ecc

Driven by sustained growth in environmental pressures and economic benefits,more and more enterprises in China's engineering machinery industry are paying attention to and put into the remanufacturing of retired engineering machinery.At present,there are three main modes of remanufacturing in China: the original equipment manufacturer(OEM)oriented remanufacturing model,the retailer oriented remanufacturing model,and the small remanufacturer oriented remanufacturing model.The OEM oriented remanufacturing with the help of the ECC intelligence service platform to implement active maintenance and active remanufacturing,which has become a new trend of remanufacturing industry.However,as the key issue in remanufacturing,the remanufacturing scheme decision with the aid of “ECC intelligent service system” lays the foundation for the remanufacturing activities.It determines whether the remanufacturing enterprises can reduce the environmental impact and benefit maximization,and subsequent remanufacturing activities can develop smoothly,and will be of great significance in theory and practical applications.Under the support of the national science and technology support plan(2012BAF02B01),the optimal recycling timing,remanufacturability,and utilization ways for are studied in paper.Details are as follows.Firstly,a recycling time decision model for remanufacturing of construction machinery based on ECC is established to solve the problem of remanufacturing product recycling when the new remanufacturing model is adopted.The method considered the environmental impact assessment and the economic cost of the product in the multi-life cycle.Combined with the product data of manufacturers and the real-time data come from ECC during running,the life cycle environmental impact value and costs of the key part in different time to be recycled for remanufacturing is calculated,then a fitting function ofthe average annual environmental impact value and the average annual cost is conducted,and the best recovery time for remanufacturing is determined finally.And send recycle instructions to user through ECC.Secondly,a new model of remanufacturing evaluation based on the failure state of parts is established,which is the technical feasibility of parts remanufacturing,and the parts remanufacturing.Economic feasibility attributes of resource and environment for parts remanufacturing.The fuzzy extension analytic hierarchy process(AHP)is used to quantitatively evaluate the indexes of remodeling of components based on the failure status of parts.Component reproducibility of the comprehensive evaluation of the value of the recycling parts to assess the reproducibility.Thirdly,to solve the problem of how to further classify the spare parts with remanufacturing value,a final decision-making method based on reliability evaluation to classify these parts is proposed.The engineering service life of mechanical parts fits in three parameter Weibull distribution function,so this decision-making method first use three parameter estimation of Weibull distribution function method along with least square method and mean rank method,to calculate the average life expectancy and residual life of these parts,thus to determine the reliability of them.Finally,according to the reliability interval,we can determine the classification methods of these parts.Finally,based on the above work,the remanufacturing evaluation and decision support system of concrete pump truck is developed,and the integrated application of the above model and method is realized.This system is suitable for engineering machinery manufacturing industry,and then in the process of remanufacturing they can achieve these functions: the remanufacturing information management of construction machinery parts,the decision of reuse-time about the engineering mechanic small parts,the evaluation of small parts' remaking possibility,and the decision about remanufacturing small parts' classification scheme.In addition,the system structure,functional module and running process are also studied,and the application of the systemis illustrated as well.