Research on construction modelbased disassembly squencing

YU Yuanzheng，LOU Yuehai
（School of Mechanical Engineering， Zhejiang Institute of Mechanical and Electrical Engineering，Hangzhou 310053， China）

Abstract： In order  to solve the problem of data explosion during disassembly sequencing for products that have complex structure,disassembly features of typical mechanical components were analyzed， valid intersections of freedom of a part were regarded as its possible disassembly directions Applying the principle of constraint eliminating， disassembly sequencing was realized by heuristic algorithms To further improve computation efficiency and practicability of the disassembly sequence， a hierarchical construction model was  introduced to downgrade assembly depth of a product By means of structural decomposing， computation reduction was realized since that was unnecessary to determine the disassembly sequence for any single part of the entire product The disassembly sequencing procedure was illustrated by   a vehicle model The result indicates that the amount of computation during disassembly sequencing is significantly reduced by the hierarchical construction modelbased constraint eliminating， and therefore data explosion for complex products is controlled
Key words： disassembly sequencing; constraint eliminating; construction model; design for disassembly（DFD）