Efficient slicing procedure based on adaptive layer depth normal image

Zeng, Long; Lai, Lip M.; Qi, Di; Lai, Yuen-Hoo; Yuen, M.M.F.

doi:10.1016/j.cad.2011.06.007

Cited by 34 publications

(18 citation statements)

References 26 publications

(23 reference statements)

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“…Surface roughness of the rapid prototypes can be improved by chemical method [2, 3], mechanical method [4][5][6][7], and mathematical method [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Development of a Precision Surface Polishing System for Parts Fabricated by Fused Deposition Modeling

Kuo

Mao

2015

Materials and Manufacturing Processes

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Additive manufacturing (AM) is the process of fabricating three-dimensional physical models by layered manufacturing without the need of molds or dies. Surface finish of AM physical models is not satisfactory for most general engineering purposes. The aim of this study is to develop an acetone-vapor polishing system to smooth acrylonitrile butadiene styrene (ABS) parts fabricated by fused deposition modeling. Acetone vapor dissolved the outer surface of ABS parts and the surface roughnesses of ABS parts with complex geometries can be significantly reduced. The advantages of this system include flexibility to maintain dimensional accuracy, high polishing efficiency, low equipment costs, and no waste chemicals compared to conventional approaches.

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“…Surface roughness of the rapid prototypes can be improved by chemical method [2, 3], mechanical method [4][5][6][7], and mathematical method [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Development of a Precision Surface Polishing System for Parts Fabricated by Fused Deposition Modeling

Kuo

Mao

2015

Materials and Manufacturing Processes

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“…Experiment results in Tab. 1 demonstrate that this slicing algorithm can achieve higher accuracy than Zeng's work [19] during the same period of time. Moreover, this work took 15% to 50% less time than Zeng's work to achieve the same accuracy, which means we have indeed achieved higher accuracy and better efficiency.…”

Section: Discussionmentioning

confidence: 91%

“…Previous work by Zeng et al [19] (denoted as Zeng's work in the sections below) proposed an efficient slicing method that speeded up the layer decomposition of the STL model by adopting a onedimensional LDNI sampling [18], which is independent of the geometric complexity or mesh density. The loop construction algorithm is then applied to the generated layered point model.…”

Section: Introductionmentioning

confidence: 99%

Robust Slicing Procedure based onSurfel-Grid

Qi¹,

Zeng²

2013

Computer-Aided Design and Applications

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The trade-off between accuracy and efficiency is of major concern in rapid prototyping (RP), where STL is the most commonly used format to present a CAD model. A STL model needs to be sliced into layered contours before it is used to build a RP object. The challenge to achieve the accuracy/efficiency trade-off becomes critical when a STL model contains a large number of triangles. Previous work by Zeng et al. [19] proposed an efficient slicing method that speeded up the layer decomposition of the STL model by adopting a one-dimensional LDNI sampling, which is independent of geometric complexity. However, the accuracy of the generated contours is not entirely satisfactory for the model with sharp features, even by adopting a high sampling resolution. Therefore, the objective of this work focuses on achieving accurate layer contours in a more effective manner without scarifying the high efficiency. In this paper, a grid-structured point representation with neighborhood information embedded, Surfel-Grid, is proposed, which consists of a Grid (formed by two in-plane orthogonal rays), and surfels (sampling points with normal vectors) located on the edges of the Grid. After discretization of a STL mesh model into layers of Surfel-Grid, loop construction is then applied to each of the Surfel-Grid layer. The accuracy of resulting layered contours is improved due to the adoption of two dimensional sampling and the generation of new reconstructed features. Taking advantage of the neighborhood information and cell validity of Surfel-Grid, each surfel can find and connect with its neighbor surfel directly, guaranteeing high efficiency in the loop construction process. Examples are used to illustrate the higher accuracy and better efficiency obtained using this approach.

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“…The hybrid PN parametric surface scheme: Models are tessellated to support processes such as rendering, machining, or even slicing as depicted in [29,30]. The tessellation is watertight and is generated implicitly without any special treatment.…”

Section: Summary Discussion and Examplesmentioning

confidence: 99%