自动装夹设计中支承位置与工件变形的几何推理方法

定位支承设计是装夹设计过程的核心部分。描述了一种自动装夹设计系统体系结构，并建立了初始装夹设计方案中工件最大变形的分析模型，应用有限元分析工具对工件最大变形进行定量分析；用3-2-1定位原理和定性分析方法提出了最佳定位支承点的调整规则和用几何推理方法求解最小变形定位支承位置推理机制。为自动装夹设计系统提供一种用3-2-1定位原理确定定位支承位置的一般算法，使工件在自动装夹设计过程中具有严格准确的位置。

Geometric reasoning approach for supporting position and workpiece deformation in the automation fixturing design

Design of supporting and locating position is an indispensable part of fixturing design process. The framework structure of automation fixturing design system is discussed in this paper. The workpiece deformation analysis module is established in preliminary fixturing design configuration. The workpiece deformation is confirmed based on the use of finite element analysis tool and quantitative approach. It introduces the allocation rules of the best supporting, locating and clamping position by 3 2 1 locating principle and qualitative approach, and the reasoning mechanism to calculate supporting and locating position of the least workpiece deformation with geometric reasoning approach. The paper also provides commonly algorithm to select supporting and locating position by 3 2 1 locating principle for automation fixturing design system to hold the workpiece rigidly and accurately during fixturing design process.