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feeder assignment optimization algorithm for multi-head mounter

控制理论与应用（英文版） 2006年第3期4卷 223-228页

作者： Peng YUAN Yueming HU Haiming LIU Hongxia GAO College of Automation Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China

This paper analyzes optimization algorithms of assembly time for a multi-head mounter. The algorithm in this paper is composed of four steps. First, it assigns the components to feeders based on the ＂one-to-many mapping＂. Secondly, it assigns nozzles to heads by making full use of the ＂on-the-fly nozzle change＂ heads. Thirdly, it Qrganizes the feeder groups so that the heads can pick and place components group by group. Finally, it assigns feeder groups to slots. The result demonstrates that the algorithm has good performance in practice.

关键词： Mounter feeder assignment Optimization

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Hierarchical planning for a surface mounting machine placement

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Journal of Zhejiang University Science 2004年第11期5卷 1449-1455页

作者：曾又姣马登哲金烨严隽琪 CIMResearchInstitute ShanghaiJiaotongUniversityShanghai200030China

For a surface mounting machine (SMM) in printed circuit board (PCB) assembly line, there are four problems, e.g. CAD data conversion, nozzle selection, feeder assignment and placement sequence determination. A hierarchical planning for them to maximize the throughput rate of an SMM is presented here. To minimize set-up time, a CAD data conversion system was first applied that could automatically generate the data for machine placement from CAD design data files. Then an effective nozzle selection approach was implemented to minimize the time of nozzle changing. And then, to minimize picking time, an algorithm for feeder assignment was used to make picking multiple components simultaneously as much as possible. Finally, in order to shorten pick-and-place time, a heuristic algorithm was used to determine optimal component placement sequence according to the decided feeder positions. Experiments were conducted on a four head SMM. The experimental results were used to analyse the assembly line performance.

关键词： Printed circuit board Surface mounting machine Hierarchical planning feeder assignment Placement sequence

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