“What-if” scenarios towards virtual assembly-state mounting for non-rigid parts inspection using permissible loads

摘要: Recent developments in the fixtureless inspection of non-rigid parts based on computer-aided (CAI) methods significantly contribute to diminishing time and cost geometrical dimensioning inspection. Generally, CAI aim compare scan meshes, which are acquired using scanners as point clouds from manufactured a free-state, with associated nominal design (CAD) models. However, deformed free-state due their compliance behavior. Industrial approaches apply costly complex physical fixtures retrieve functional shape assembly-state. Therefore, developed eliminate need for these replace them simple supports. Fixtureless intend virtually (numerically) compensate flexible deformation free-state. Inspired by industrial techniques wherein weights (e.g., sandbags) applied restraining loads parts, we present new method this article. Our proposed virtual mounting assembly-state (VMASI) aims at predicting (in assembly-state) deviated part (including defects such plastic deformation). This is capable mesh (acquired free-state) into designed fulfilled applying permissible forces (loads) that introduced pressures surfaces part. The then predicted via linear FE-based transformation where value position required assessed our optimization (RPO) approach. In fact, RPO minimizes orientation difference distance between assembly holes respect ones CAD model. Eventually, accomplished examining offset model concerning ensures remain dedicated tolerance range. evaluated two predict limited during process eventual We numerical validations each part, different types synthetic (numerically simulated) included determine whether geometrically can be retrieved under constrains.