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Base part centered assembly task precedence generation

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Abstract

The recognized potential of cobots for industrial applications has been motivating a growing body of literature. As further research uncovers new potential applications, cobots are permeating into more more complex industrial applications. The inherent safety of cobots enables them to work at multiple levels of autonomy in close proximity with human operators. While this opens a range of new possibilities for human-robot collaboration, it also requires a different approach to assembly sequence generation. Most assembly sequence generation methods lack the flexibility to consider assembly tasks concurrently performed by operator and cobot. By splitting the products into sub-assemblies, the focus of both robot and human can be divided over multiple sub-assemblies assembled simultaneously or centered into a single sub-assembly for mutual assistance. In this paper, an algorithm for the identification of assembly task precedence is presented. Unlike most previous methods, by identifying sub-assemblies, their assembly precedence and that of their comprising parts, parallel task execution is not hindered by rigid linear assembly sequences. The output of the proposed algorithm allows for the creation of collaborative assembly sequences embedding resource capability, collaborative workplace design, and safety considerations. The proposed algorithm uses liaison and collision matrices as input as well as base part and sub-assembly content.

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Funding

This research is financially supported by Flanders Make, the strategic center for the manufacturing industry in Flanders within the framework of Project Yves.

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Correspondence to João Costa Mateus.

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Mateus, J.C., Claeys, D., Limère, V. et al. Base part centered assembly task precedence generation. Int J Adv Manuf Technol 107, 607–616 (2020). https://doi.org/10.1007/s00170-019-04864-y

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  • DOI: https://doi.org/10.1007/s00170-019-04864-y

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