孔系组合夹具的零件定位方案自动确定方法

提出了一种孔系组合夹具的一般定位方式，该定位方式包括工件定位边与定位元件之间接触边的类型及其组合形式，每一个定位方案由3个固定在基础板上的定位元件组成，其中定位元件包括圆柱销和半V形定位块以及两者之间的各种组合。提出了建立定位方案集合的实施算法，将3个定位元件在基础板上的位置问题分解为两个步骤。首先根据2个定位边的类型和位置，确定2个定位元件的所有可能位置集合，然后根据给定3个定位边以及其中2个定位边上的定位元件位置和类型，确定第3定位元件全部可行定位位置集合。该方法可用于建立孔系组合夹具可行定位方案集合。

Automatic approach to determine location plan set of workpiece for holes-system modular fixture system

A general location mode for holes-system modular fixture was proposed.The location mode included all the configurations of contact edges among the located elements and the workpiece silhouette in the located plane.Each plan consisted of three locators rigidly attached to the lattice of holes on the base plate,and the locators were composed of circular locating pin and half-V and various combinations of these two locators.An implementation algorithm to construct the set of all feasible location plans was presented.The algorithm determined the position of locators in two steps;all possible located position sets of two locators were determined firstly according to the type and the position of the two given located edges of workpiece,then the third locator and all feasible located position set were defined after the workpiece were constrained partially by first two locators.The approach could be used to establish the whole available location plan sets for given workpiece and holes-system modular fixture configuration.