The Locators' Layout Optimization for Flexible Sheet Metal Workpiece Using the Genetic Algorithm
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摘要: "N-2-1"定位原理被广泛应用于柔性薄板件的定位过程中,第一基准面上定位点数N的数目和位置是柔性薄板件定位设计的关键。当前,工厂和企业大多靠经验来设计定位,这样往往带来定位精度不够的问题。作者提出了一种适合柔性薄板冲压件定位位置优化设计的方法。该方法利用APDL语言基于遗传算法开发了定位点优化布置计算方法,研究了平面及曲面零件在重力作用下定位点的分布情况,分析了曲面零件定位误差在观测点的放大情况,完善了考虑工件制造误差的定位点布置的分析方法。Abstract: The "N-2-1" locating principle is widely used in the locator's layout for the flexible sheet metal work-piece, in which N, the number of locators on primary datum, is a key to sheet metal fixture design. At present, lo-cator's layout is frequently decided by experience, which often leads to unsatisfactory locating precision in sheet stamping and assembly. In this paper, a genetic algorithm, which is programmed using APDL (ANSYS Parametric Design Language) , was proposed to lay out the N locators for the flexible sheet metal workpiece. The present meth-od was successfully applied to study the locators' layout of flat and curved surface workpiece, analyze the phenome-non of deviation amplification on observing point in curved surface work pieces and consummate the method of loca-tors' layout which considers deviation of workpiece. The present results have a guiding significance to consummate optimization method of locators' layout of flexible sheet workpiece.
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Key words:
- genetic algorithm /
- flexible sheet workpiece /
- locating
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