Research on Disassembly Sequence Planning Method for Maintenance

摘要

Some parts of mechanical products often need to be replaced or repaired for maintenance. The complexity of the internal structure of machine makes the disassembly sequence planning the focus of researches. A threedimensional disassembly sequence planning method is put forward in this paper based on the interference relationship of parts and components of complex machine. In this method, the hierarchical disassembly model of complex structure of machine was built based on group technology to express the mechanical products using parts and components after removability analysis. The three-dimensional nested combinatorial interference matrix was designed based on traditional interference matrix on several dimensions and the nested structure of matrix to express the disassembly relationship corresponding to the hierarchical model. The disassembly difficulty factor was introduced to determine the optimal disassembly sequence. An example was used to verify the rationality and effectiveness of the method. The method provided a new perspective of disassembly sequence planning and can be easily applied in engineering.