A For 3D Assembly Simulation System Parts With Geometric Deviations

Abstract

2. Virtually assemble those deviant components and resolve their relative positions. Current CAD systems andperipheml so f twae can handle solid models. However, a solid model reflects only one aspect of a component’s geometry, that is, its ideal (or nominal) shape. For tolemnce analysis, component models should allow geometric deviations. In this paper we propose a deviant component model, which consists of (1) a solid model and (2) deviations of surfaces at selected points. Given such a deviant component model, the relative positions of fitted parts aw calculated b y using linear piogramniing, which uses an objective function derived f rom the attachment co.nditions. Design variables’ values and ranges are also estimated.