Research On Design Methods And Active Disassembly Techniques Of Electronic Products And Household Appliances Based On ADSM

One of the main diffecults to recycle electronic products and household appliances is the lowefficiency and high cost of disassembly, and one solution is active disassembly using smartmaterials(ADSM). The key of ADSM technique is active disassembly devices(ADD) made ofsmart materials, such as shape memory alloy or shape memory polymer. ADD is a kind of devicesthat can be use as connecters or put beside connecters. The connecters would be invalidated inconnection if the ADD is metamorphosed by special excitements. There are two kinds of ADD,one kind is mainly made of shape memory alloy and are not used as connecters, this kind of ADDis worked by supplying the metamorphose force that can detaches the parts of products; the otherkind of ADD is used as connecters in products, when they are excited or triggerd, the ADD willmetamorphoses or losts intensity of tension and be invalidated in connection, then the products areactive disassembled. ADSM method can highly enhance the efficiency of disassembly, andconvenience the disassembly and recycle of electronic products and household appliances.Design methods and active disassembly technique of electronic products and householdappliances based on ADSM are researched for achieving the goal of efficient and no-damagedisassembly.Design factors of active disassembly products, including function, configuration,environment, et al., are analyzed from the point of view of system design. Design process andprinciples of active disassembly products are discussed. For solving the problem of low efficiencyto trigger large products or to separate all kinds of parts, design methods of multi-steps activedisassembly are researched, including how to compartmentalize the disassembly level of parts andthe compartmentalization principles.ADD can be divided into active disassembly actuators and active disassembly connectorsfrom their principle of work. The work principles of two kinds of ADD are analyzed, and thedesign principle and methods of several typical ADD, such as SMA actuators, SMP snap-fits, andADD triggered by electric-heating or pressure, etc.The system design methods of active disassembly products are put forward. On the basis ofanalysing the elements of ADD, the design methods of ADD based on shape memory meterialsand the ADD triggered by electric heating or multi-field excitation are researched. For validatingthe feasibility and correctness of these design methods, active disassembly remotes andmobilephone are designed based on the methods above, and active disassembly effects of them areexperimentalized. The disassembly efficiency and costs in whole lifecycle of active disassembly products are compared with normal products, and the superiority of design methods based onADSM is proved.The common ADD and active disassembly products triggered by a single field may beaccidentally detached in using phase because of their low reliability. For solving this problem, theADSM in multi-fields excitation method is brought up, and the design methods of multi-fieldsexcitation ADD are researched. The behavior model of active disassembly products in multi-fieldsis also founded.