Optimizing fixture layout in a point-set domain
Optimizing fixture layout in a point-set domain
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DOI：
10.1109/70.938388
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发表时间：
2001-06
期刊：
影响因子：
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通讯作者：
M. Wang;Diana M. Pelinescu
中科院分区：
文献类型：
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作者：
M. Wang;Diana M. Pelinescu
本文提出了一种以元件数最少为目标的夹具布局优化设计方法，六个定位器和一个夹子该方法适用于具有任意3D几何形状的零件，并且被限制在用于放置非摩擦接触的夹具元件的位置的离散域内。本文解决了两个主要问题：1）开发一个有效的算法在点集域的夹具综合;和2）评估可接受的夹具设计的基础上的几个性能标准，并选择最佳的夹具根据实际要求。所考虑的性能目标包括工件定位精度，以及定位器接触力的规范和分散。提出了一种随机初始化的交换算法。此外，夹具的性能特性进行评估，以了解他们的权衡。讨论了精确定位和接触力平衡的重要性。
This paper describes an approach to optimal design of a fixture layout with the minimum required number of elements, i.e., six locators and a clamp. The approach applies to parts with arbitrary 3D geometry and is restricted to be within a discrete domain of locations for placing the fixture elements of non-frictional contacts. The paper addresses two major issues: 1) to develop an efficient algorithm for fixture synthesis in the point set domain; and 2) to evaluate the acceptable fixture designs based on several performance criteria and to select the optimal fixture according to practical requirements. The performance objectives considered include the workpiece localization accuracy, and the norm and dispersion of the locator contact forces. An interchange algorithm with random initiation is developed. Also, the fixture performance characteristics are evaluated to understand their tradeoffs. The importance of the accurate localization and the contact force balance is discussed.