Research On Probability Evaluation Methods And Programming Models For Product Disassembly

With the economic development, more and more new products need to update tosatisfy demand and lots of obsolete prdocuts are generatd fastly. In order to protectenvironment, reduce environmental pollution and promote resource, recycling andremanufacturing of products, as important forms of circular economy, have arousedwidespread concern in society.Product disassembly is defined as "the prcocess of systematic removal ofdesriable cosnstiute parts from an assembly whlile ensuring that there is noimpairment of the parts due to the process". Disassemble is the prerequisite forefficient recycling, it is also the important link of product remanufacruing. Therefore,efficient disassembly not only conserves natural resources and energy, but alsoeffectively reduces environmental pollution. In addition, it can promote the healthydevelopment of recycling economy and sustainable development of industry..In this paper, based on the inland and outland research on staus of productdisassembly, introduce and propose the systemic analysis of the principle and imparctfactors of product disassembly, dismantlbility evaluation system and disassemblyplanning and so on, the main contents of the study are summarized as follows:(1) Introduce the the purpose and significance on product disassembly anddescribe the current technology status on disassembly technology at home and abroad.It is said that the development of green disassembly technology not only caneffectively reduces environmental pollution and saves the resource and energy, butalso can promet the development of area ecnocmy. In addition, the status ondisassemblability evauation and design, modeling and planning of productdisassembly and experients of product disassembly are summarized.(2) Factor analysis of product disassembly process is the premise ofunderstanding disassembly. In order to understand the substance of productdisassembly, from perspective of connection types, structural features, disassemblytools and states, their factor influence are analysed and the conclution that the product disassemblyl is a complex system problem is obtained. In addition, the principle andprocedure of product disassembly are expounded. Finanly, taking the removl processof the bolts as an example, their influence factors are analyzed.(3) Typical evalution pramters are defined, such as disassembly time, cost andenergy and their index and relation are described in detail. In addition, based on thecomparative analysis of prameters, it can be seen that the determination of removalprobability distribution is the basis of all of works. Based on this conclusion, takingthe removal time of the bolt as an example, its removal probability distribution isobtained by the statistical analysis and matching method of typical distributions. Theabove study provides the solid theoretical foundation of product disassemblyevalution and optimzation.(4) Disassembly planning is considered as the optimization of disassemblyprocess or disassembly sequence with the target of the shortest disassembly time, thelowest disassembly cost and the minimum disassembly energy consumption. Fistly,taking the time as a typical parameter, time evaluation of compression plate structureis analysed. In addition, taking the typical transmission device for example, combinedwith the deisgined solving algorithm, its typical programming models are analysed.(5) Disassembly cost is closely to the economic problem of product disassembly,taking the cost as the evalution parameter and combined with combined with theconcept of the cost disassemblability degree, the cost assessment model of productdisassembly is established. In addition, their cost planning models and sovingalgorithm are presented. Finnaly, an example is provided to verify the rationality ofthe model and the effectiveness of the algorithm.(6) Saving energy is one of the hot topics in the society. Taking the disassemblyenergy as the evalution parameter and combined with combined with the concept ofthe energy disassemblability degree, the energy assessment model of productdisassembly is established. In addition, their energy planning models and sovingalgorithm are presented. Finnaly, an example is provided to verify the rationality ofthe model and the effectiveness of the algorithm.