Dental restoration contour-parallel offset tool path links based on graph model

Dai, Ning; Dong, Guang; Liao, Wenhe; Sun, Yu Chun

doi:10.1007/s00170-012-4349-z

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…Hunduja et al [20] proposed an algorithm which employs segments on the Voronoi diagram as links. Dai et al [21] presented a graph model-based pathlinking algorithm for dental restoration.…”

Section: Traditional Offset Methodsmentioning

confidence: 99%

Smooth contour-parallel tool path generation for high-speed machining through a dual offset procedure

Lin

Shen

et al. 2015

Int J Adv Manuf Technol

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In generating a contour-parallel tool path, traditional offset methods usually offer an arc rounding option for superior sharp corners. For the inferior ones, however, they are left untreated. The inferior sharp corners are harmful to high-speed machining (HSM). They should be dealt with when they emerge for the first time; otherwise, they will be further inherited by the offset successors. In this paper, we presented a dual offset procedure to round the inferior sharp corners. For a given path, literally, the procedure conducts two offsets: at first, the path is offset inwards, generating an intermediate curve; then, this curve is further offset outwards, outputting the dual offset curve. The dual offset curve is guaranteed to be smooth. It is used to replace the original path. One side effect of this procedure is that many uncut regions will be left in the corner areas. These uncut regions are detected through a Boolean operation and removed by smooth clearup tool paths. Finally, the dual offset and clear-up tool paths are connected with a set of linking arcs. The proposed smooth tool path generation method is implemented and verified by several examples. Comparative cutting simulations show that this method has a potential to improve the machining efficiency in terms of HSM with nearly a zero cost.

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“…Hunduja et al [20] proposed an algorithm which employs segments on the Voronoi diagram as links. Dai et al [21] presented a graph model-based pathlinking algorithm for dental restoration.…”

Section: Traditional Offset Methodsmentioning

confidence: 99%

Smooth contour-parallel tool path generation for high-speed machining through a dual offset procedure

Lin

Shen

et al. 2015

Int J Adv Manuf Technol

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“…Once the slicing is done, researchers focus on the tool path offsetting and linking within a single layer (Kim and Yang, 2008;Lin et al, 2013). The method has also been used in dental restoration machining (Dai et al, 2013). Nevertheless, as discussed in Section 1, the iso-height strategy is after all a 2.5D method.…”

Section: Related Workmentioning

confidence: 99%

A morphing machining strategy for artificial bone

Gan

Shen

et al. 2014

J. Zheijang Univ.-Sci.

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Abstract:In this work, a novel morphing machining strategy (MMS) is proposed. In the method, the workpiece is progressively carved out from the stock. Pitfalls in conventional iso-height strategy, such as sharp edges and unevenly distributed left-over materials, are overcome. Moreover, to calculate different levels in the MMS, an energy-based morphing algorithm is proposed. Finally, the proposed strategy is employed in the machining of artificial bone represented by a T-spline surface. The excellent properties of T-spline, such as expressing complex shapes with a single surface, have been well adopted to artificial bone fabrication. Computer simulation and the actual machining of the middle finger bone show the feasibility of the proposed strategy.

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“…Therefore, these undesired effects will bring evenly distributed load to the machine and inevitably lead to uncontrollable machining process, which may direction and global linking method for sub-toolpaths are published. As for contour-parallel method, tool-paths are mainly obtained by the following two phrases [10]: (1) Constructing toolpath loops (TPLs) and (2) Linking TPLs. The former phrase is normally implemented by offsetting the border contour inwardly and island contours outwardly, which are computationally expensive.…”

Section: Introductionmentioning

confidence: 99%