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首页> 外文会议>Proceedings of the 1999 ASME design engineering technical conferences >Practical passive assembly: gripper design and assembly sequence optimization
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Practical passive assembly: gripper design and assembly sequence optimization

机译：实用的被动装配：夹具的设计和装配顺序的优化

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For efficient assembly without feedback systems (or, passive assembly), the assembler should know the ideal orientation of each component and the assembly sequence. A heuristic presented here finds an optimalassembly sequence and prescribes the orientation of the components for a sequence and prescribes the orientation of the components for a minimum set of grippers - ideally one. The heuristic utilizes an index of difficulty (ID) that quantifies assembly. The ID for each task in the assembly process is computed based on a number of geometrical and operational properties. The objective of the optimizationproblem here is to minimize the assembly ID and categorize parts/subassemblies based on their preferred direction of assembly while allowing re-orientation of the base part. It is assumed that the preferred direction of assembly is vertically downwards consistent with manual as well as most automatic assembly protocols. Our attempt is to minimize the number of degrees of freedom required in a re-orienting fixture and mathematically derive the requirements for such a fixture. The assembly of a small engine is used as an example in this study due to the variety of ideally rigid parts involved.
机译：为了在没有反馈系统的情况下进行高效组装（或被动组装），组装人员应了解每个组件的理想方向和组装顺序。此处介绍的启发式方法可找到最佳的装配顺序，并针对一个顺序规定组件的方向，并针对最少的一组夹爪​​（理想情况下为一个）规定组件的方向。启发式算法利用量化装配的难度指数（ID）。组装过程中每个任务的ID是根据许多几何和操作属性来计算的。此处，优化问题的目的是使装配ID最小化，并基于零件/子装配的首选装配方向对其进行分类，同时允许重新定位基础零件。假定与手动以及大多数自动装配规程一致，装配的首选方向是垂直向下。我们的尝试是使重新定向固定装置所需的自由度数量最小化，并从数学上推导出此类固定装置的要求。由于涉及各种理想的刚性部件，因此本研究以小型发动机的组装为例。

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