期刊
COMPUTER-AIDED DESIGN
卷 50, 期 -, 页码 41-50出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cad.2014.01.007
关键词
Tool-path; Milling; Non-deterministic techniques; Spherical tool; STL surface
资金
- Education Ministry of Spain
- European Social Fund
For milling an arbitrary surface, several models exist in which the tool must be moved close and away from the workpiece with its consequential problems caused by the contact between the tool and the mechanized material. One of these problems is the undesirable mechanizing marks on the surface, which can be avoided with the use of tangential tool-paths, causing another disadvantage: the additional time-consumption. Spiral tool-paths eliminate these problems and allow for continuous machining of the part without approach or withdrawal. Deterministic models for obtaining the tool positions referred to the part need to apply complex mathematical operations. For this reason, the idea of using non-deterministic techniques, with a controlled tolerance margin, allows to avoid those mathematical and geometrical operations. It also makes possible to reduce the processing times with no loss of dimensional quality and a good superficial finishing, which was confirmed with a coordinate measuring machine and with confocal microscopy, respectively. Finally, the effectiveness of the described method was assessed comparing its results with the performance of three of the most relevant CAM software commercially available. The obtained results are shown at the end of this paper. (C) 2014 Elsevier Ltd. All rights reserved.
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