Research On Disassembly Sequence Planning And Disassembly Design Method For Electromechanical Product

Disassembly is one essential factor of electromechanical products’green performance. To improve the electromechanical products’disassemble performance is not only the key way to improveelectromechanical products’ green performance, but also the prerequisiteto improve the benefits of electromechanical products’ recycling. Basedon literature reviewing the present situation of research on disassembly,electromechanical products’ disassemble sequence planning and designimprovement methods were studied in this dissertation.Main contents of this dissertation are summarized in the following sixaspects：(1) A disassembly model based on “parts-connections" and thecorresponding disassemble sequence planning method were established.This dissertation analyzes the shortcomings of the disassembly sequenceplanning based on parts, then studied the complicated situation ofincompleteness disassemble for electromechanical products. Finally adisassemble model aimed at both parts and connections and thecorresponding disassemble sequence planning method were studied. Themodel includes the mapping relationship between parts and connections,and the disassembly sequence planning based on simulated annealingalgorithm. The results of disassemble sequence planning included bothparts sequence and connections sequences, so it can generate directdisassembly sequence from both the process and result.(2) By analyzing the differences between waste products and thebrand new product, this dissertation had tried to solve the uncertaintyproblem with disassemble model and disassembly sequence planning byusing uncertainty programming theory, so an disassemble model anddisassemble sequence planning method based on “parts-connections"disassemble model and uncertainty programming theory to fit theuncertainty situation of product were studied. The model was based onstatistics and random chance-constrained programming，and the universal disassemble sequence planning method to fit in uncertainty situation wasbased on simulated annealing algorithm.(3) For some specific cases that the result of the universal disassemblesequence planning method could not solve, an adjustment method basedon greedy algorithm was established. This method had constructed thegreedy criterion for adjusting the disassemble sequence and finally theprocess was shown in this thesis.(4) The impact factors of product disassemble performance wasanalyzed, and a quantized evaluation framework based on technical,economic, environmental and the uncertainty of disassemble for the partsand products disassemble performance was given. The Sensitivityanalysis method to analysis the product disassemble performance wasalso given in this dissertation.(5) Based on case-based reasoning and TRIZ theory, a detachableconnection structure improvement design system framework was given. Atemplate to describe the design requirements and the existed cases and thealgorithm to measure the similarity of design requirements and theexisted cases were given. By using the su-field analysis model of TRIZtheory, innovative design principles, Standard solution and nonnativedesign rules query method was given to guide the detachable connectionstructure improvement design.(6)Finally an electromechanical products disassemble sequenceplanning and design improvement system was developed based on thetheories and methods above, and one of the key technologies of PRO/Esecondary development for virtual disassemble was illustrated. Thissystem validates the correctness, feasibility and effectiveness of thisresearch.