Decomposition-Based Assembly Synthesis for In-Process Dimensional Adjustability

Survey on assembly sequencing: a combinatorial and geometrical perspective

“…The root node is the full assembly, and the leaves are the individual parts. AND/OR graphs are used in de Mello and Sanderson (1991); Romney et al (1995); Wilson and Rit (1990); Lee and Saitou (2003); Thomas et al (2003).…”

Three-Dimensional Assembly Synthesis for Robust Dimensional Integrity Based on Screw Theory

“…Previous works related to assembly synthesis in general are reviewed in (Lee and Saitou, 2003a). Due to the space limit, this section focuses on the works relevant to the 3D extension of the method.…”

“…The use of these tools in complex assemblies can be a very tedious task due to the coupling between the product decomposition, joint assignments, and assembly sequences. As a remedy, we have previously designed (Lee and Saitou, 2003a) a correct and complete algorithm to fully enumerate feasible solutions for any 2D enclosure geometry. Assuming that assemblies can be built in the reverse sequence of decomposition, the algorithm recursively decomposes a given product geometry into two subassemblies until parts become manufacturable.…”

“…The assembly synthesis algorithm in (Lee and Saitou, 2003a) adopted in this paper assumes every assembly step combines two subassemblies. Conversely, the algorithm decomposes a configuration into two (sub)configurations, by removing some connections, which is equivalent of finding a cut-set ‡ (Foulds, 1991) of the configuration graph.…”

“…With two slip planes perpendicular to each other, the design in (b) can absorb manufacturing variations within section 1 and 2-3-4, provided that variations in angles are negligible. In addition to the decomposition of product geometry and the assignment of joint types at part interfaces, the assembly sequence also influences the in-process Figure 2 Two box designs (a) without and with (b) proper constraints (Lee and Saitou, 2003a). …”