Assembly Unit Partition Based on Theory of Cut-Set

Abstract:

In the manufacture process of many large-scaled and complex products assembly, due to large number of parts or components, assemblies are often divided into several small assembly units in order to organize production and increase assembly efficiency. To obtain fine-grained rapid assembly unit partition, this paper presents a method of assembly unit partition based on cut-set theory with consideration of the assembly constraints and assembly complexity. The paper also discusses the method of establishing the assembly relationship graph of a product as the basis of unit partition. The relationship graph is extracted from the CAD model of the product and is used to describe the relationship of its component assembly. Using the proposed unit partition method, assembly constraints such as precedence relationship can be considered so that invalid assembly unit partition will be avoided. Furthermore, by defining assembly complexity, optimal selection of assembly unit partition can be achieved. The procedures of assembly unit partition including establishing of assembly relationship from CAD model, approach to cut-set, optimal selection and validation are addressed with an assembly example and a flow chart.

• Periodical: Applied Mechanics and Materials (Volume 163)
• Pages: 162-165
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.163.162
• Online since: April 2012
• Authors: Pei Wei Hu, Li Hong Qiao
• Keywords: Assembly Relationship Graph, Assembly Unit Partition, Cut-Set

References

[1] L.P. Li, Y. Li and K.F. Zhang: Mechanical Science and Technology, Vol. 27 (2008) No. 2, pp.157-161.

[2] Y. Zhang, K.F. Zhang, J. F Yu and L. Zhao: International Conference on Advances in Materials and Manufacturing Processes(Shenzhen, China, November 6-8, 2010). Vol. 156-157, pp.323-328.

[3] L. Sukan and S.Y. Gil: Proceedings of the 1990 IEEE International Conference on Robotics and Automation(Cincinnati, U.S. A, May 13-18, 1990). Vol. 3, pp.1606-1611.

[4] Y. Wang & J.H. Liu and L. S. Li: Int J Adv Manuf Technol, Vol. 45 (2008) No. 7, pp.808-820.

[5] L.P. Li: Aviation Product Assembly Unit Partition Based on Knowledge Design(Ph.D., Northwestern Polytechnical University, China 2005), pp.28-32.

[6] Y.P. Zhang and C.D. Li: Machine Design, Vol. 21 (2004) No. 9, pp.10-13.

[7] Z.J. Wang: Assembly Process Model of Airplane and Its Key Technology Research(Ph.D., Beihang University, China 2010).

[8] L.H. Qiao, F. Han and B. Alain, A Unified Assembly Information Model for Design and Manufacturing, In: Bernard, A., Global Product Development, Berlin: Springer, 2011: 465-472.

DOI: 10.1007/978-3-642-15973-2_47