期刊
COMPUTER-AIDED DESIGN
卷 50, 期 -, 页码 61-73出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cad.2014.01.009
关键词
Tool-adaptive path planning; Anisotropic distance functions; Milling; Spray coating
资金
- Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Center [SFB 708]
Path-oriented, computer-controlled manufacturing systems work by moving a tool along a path in order to affect a workpiece. A common approach to the construction of a surface-covering path is to take a finite family of offset curves of a given seed curve with increasing offsets. This results in a set of quasi-parallel curves. The offset is chosen so that a tool moving along the curves has the desired impact at every surface point. In cases where the region of influence of a tool is different across the surface, an offset value necessary in one region may lead to a curve offset lower than required in other regions. The paper presents a general method of offset curve construction with tool-adaptive offsets. The offset path is obtained as a family of iso-curves of an anisotropic distance function of a seed curve on the workpiece surface. Anisotropy is defined by a metric tensor field on the surface. An application-independent algorithmic framework of the method for workpiece surfaces represented by a triangular mesh is presented. Its usefulness is demonstrated on the problem of varying cusp heights for milling and for spray coating of surfaces with a spray gun moved by an industrial robot. (C) 2014 Elsevier Ltd. All rights reserved.
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