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Hierarchical planning for a surface mounting machine placement

机译:表面贴装机放置的层次规划

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摘要

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.
机译:对于印刷电路板(PCB)组装线中的表面安装机(SMM),存在四个问题,例如CAD数据转换,喷嘴选择,进纸器分配和放置顺序确定。这里介绍了它们的分层计划,以最大程度地提高SMM的吞吐率。为了最大程度地缩短设置时间,首先使用了CAD数据转换系统,该系统可以从CAD设计数据文件中自动生成用于机器放置的数据。然后实施了有效的喷嘴选择方法,以最大程度地减少更换喷嘴的时间。然后,为了最小化拣选时间,使用了用于进料器分配的算法来尽可能多地同时拣选多个组件。最后,为了缩短取放时间,根据确定的进纸器位置,使用启发式算法确定最佳的组件放置顺序。实验是在四头SMM上进行的。实验结果用于分析流水线性能。

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