孔系组合夹具夹紧方案自动规划方法

Automatic clamp planning approach for holes-system modular fixture system

提出了基于实体模型的工件夹紧点自动确定方法和夹紧信息表示方法。采用了工件外轮廓的规约化方法,根据工件的规约化几何形状,确定工件满足夹紧要求的夹紧点个数,再进行夹紧点位置区域划分。从每个区域中各选择一个夹紧点组成一个夹紧方案,形成了可行夹紧方案集合。根据夹紧点位置、高度与受力多边形关系,来评价夹紧方案。

The automatic identification method for the feasible clamping point of a workpiece surface and the represen tation method for the clamping information based on the solid model were proposed. The reduction method of the projecting outline of workpiece was employed, and with the help of the reduced geometry of the workpiece, the number of necessary clamping point for given workpiece could be determined and the district of the feasible clamping points was established according to the location of each clamping point. The feasible clamping plan was constructed by selecting one clamping point from each district of clamping point of the workpiece. The clamping plan was evaluated according to the height and location of each clamping point and the relationship between the clamping points and the actual support region of the main datum plane of a workpiece.