Research On The Key Technology Of Remanufacturing Disassembly For End-of-life Products Considering Failure Characteristics

Remanufacturing is a method to restore or even exceed the original performance of retired products by high-tech,which can effectively recover and reuse the surplus value of products.As the basis for efficient recycling and processing of end-of-life products components in remanufacturing,disassembly has a direct impact on remanufacturing disassembly efficiency and cost.In the actual disassembly process,the end-of-life products often have multiple failures,which have a great impact on the subsequent disassembly analysis.However,the traditional remanufacturing disassembly technology research ignores the influence of the failure characteristics of the end-of-life products on the remanufacturing disassembly process,which leads to the failure to guide the disassembly practice.In order to overcome the above shortcomings,this paper takes end-of-life products as the research object,and studies the key technologies of remanufacturing disassembly,include the construction of hierarchical model of disassembly information of end-of-life products under multiple failure constraints,the parallel disassembly sequence planning of remanufacturing driven by multiple failures,and multi-granularity feasibility evaluation method of the partial destructive disassembly for an end-of-life product.The main research contents are as follows:(1)In the view of the existing disassembly information model does not consider the influence of failure characteristics of components on disassembly sequence planning,according to the characteristics of product hierarchy,the disassembly hybrid graph model is improved,and the multiple failure constraints are added.The hierarchical model of disassembly information of end-of-life products under multiple failure constraints was constructed,which provides support for computer solution of automatic disassembly problem of end-of-life products.(2)Against the problem that the existing research can not guide the parallel disassembly practice of end-of-life products under multiple failure constraints,a remanufacturing parallel disassembly sequence planning method driven by multiple failures was proposed.The disassembly information is mapped by multi-layer chromosome coding,and the initial population acquisition method considering component recovery decision was proposed.The sequence planning solution based on improved genetic algorithm is realized,which provides ideas for the intelligent algorithm of the disassembly sequence problem of end-of-life products under multiple failure constraints.(3)A multi-granularity feasibility evaluation method was proposed in order to overcome the problems of large number of parts and components of end-of-life products and difficulty in overall evaluation of partial destruction disassembly(PDD).By analyzing the influencing factors of failure characteristics of end-of-life products on PDD,coarse-grained and fine-grained evaluation indexes are extracted.A multi-granularity feasibility evaluation model of the PDD was constructed based on complex products’ hierarchical structure;the target group is constructed according to the failure characteristics.Taking the target group and the component layer as the object,the coarse-grained and fine-grained evaluation of the feasibility of PDD of end-of-life products are carried out in stages.The rapid evaluation and feedback of the feasibility of PDD of end-of-life products are realized.(4)The prototype system of remanufacturing disassembly technology is developed based on NX,the functions of automatic acquisition of remanufacturing disassembly information model,remanufacturing sequence planning and feasibility evaluation of PDD are realized,and the feasibility and practicability of the proposed method are verified by taking the stapler and Passat automobile engine as examples.