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Proceedings of CAD'17, 2017, 384-388
Edge Restoration for Triangle Mesh Models Derived from Grid-Based Machining Simulation

Ziqi Wang, Jack Szu-Shen Chen, Jimin Joy, Hsi-Yung Feng, The University of British Columbia

Abstract. Chamfered edges occur in triangle mesh models generated from discrete machining simulation methods such as vector approximation methods and voxel and space partitioning methods. The sharp edge of intersection between two machined surfaces is replaced by a thin chamfer surface.  In the case of representing the machined workpiece as a triangle mesh model, the thin chamfer surface appears as a set of triangles that runs between the triangles representing the surfaces on either side of the original edge.  Chamfered edges happen for triangle meshes generated from the vector and voxel based simulations because of the grid structure of the underlying simulation methods.  Sampled surface points are only available at grid crossings.  It is often the case that edges do not cross the grid exactly.  These edges are not captured, resulting in chamfered edges.  Presence of chamfered edges reduces the accuracy of the generated mesh model and deteriorates the visual quality.  Thus, chamfered edges need to be restored as they happen unwantedly.  Machining simulation using vector and voxel based simulation methods is quite popular due to its efficiency but the issue of chamfered edges needs to be properly resolved.  To address this issue, this paper presents a fast edge restoration scheme for triangle mesh models generated from grid-based machine simulation.

Keywords. Machining Simulation, Workpiece Model, Machined Edge Restoration

DOI: 10.14733/cadconfP.2017.384-388