Specifying non‐uniform cusp heights as a potential aid for adaptive slicing

Cormier, Denis; Unnanon, Kittinan; Sanii, Ezat T.

doi:10.1108/13552540010337074

Cited by 65 publications

(37 citation statements)

References 3 publications

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“…Adaptive slicing concepts have been researched to minimise the staircase effect by varying the layer thickness (Sabourin et al 1996, Tyberg and Bohn 1998, Cormier et al 2000, and direct slicing concepts have been researched to skip the STL conversion to avoid chordal error (Jamieson and Hacker 1995, Chen et al 2001, Cao and Miyamoto 2003. Although there are some weaknesses in direct slicing, it has been proved useful for RP users in terms of reduced file size and execution time, and better model accuracy.…”

Section: Related Workmentioning

confidence: 98%

Towards direct transformation of orthographic-view drawings into a prototype

Soonanon

Koomsap

2009

Virtual and Physical Prototyping

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Since its early days, geometrical reconstruction (GR) has been developed as a stand-alone process for reconstructing a 3D CAD model from a 2D engineering drawing. Addressed in this paper is an attempt to extend GR application to interface it with the rapid prototyping process (RP) in order to construct a prototype directly from an engineering drawing. A layer-based geometric reconstruction (LBGR) concept has been developed to couple the two applications. LBGR locally translates information on the 2D drawing into a stack of contours section-by-section in a top-down direction, in which the top and bottom contours of each section are identified before its intermediate contours are generated. It can be applied to parts that consist of regular surfaces whose edges are clearly presented on the orthographic views (e.g. plane surfaces, conical surfaces, ruled surfaces with cross-sectional contours parallel with the xy plane). This concept has been implemented in LabVIEW to demonstrate this direct interface. Inputs and outputs are orthographic view images of a drawing and the vector files of contours, respectively. The direct transformation of mechanical part drawings into physical prototypes is also presented in this paper.

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Section: Related Workmentioning

confidence: 98%

Towards direct transformation of orthographic-view drawings into a prototype

Soonanon

Koomsap

2009

Virtual and Physical Prototyping

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“…Ma and He [11] developed an algorithm to operate directly upon a nonuniform rational B-spline (NURBS) surface model they use this algorithm for accurate and smooth part surface while selective hatching strategy use for reducing the build time. Cormier et al [12] presented an interactive procedure for gathering cusp height requirement for the different faces of the part. They determined the various surface roughness requirements and achieved efficiency gain in adaptive slicing.…”

Section: Literature Reviewmentioning

confidence: 99%

A Review of Variable Slicing in Fused Deposition Modeling

Nadiyapara

Pande

2016

J. Inst. Eng. India Ser. C

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The paper presents a literature survey in the field of fused deposition of plastic wires especially in the field of slicing and deposition using extrusion of thermoplastic wires. Various researchers working in the field of computation of deposition path have used their algorithms for variable slicing. In the study, a flowchart has also been proposed for the slicing and deposition process. The algorithm already been developed by previous researcher will be used to be implemented on the fused deposition modelling machine. To demonstrate the capabilities of the fused deposition modeling machine a case study has been taken. It uses a manipulated G-code to be fed to the fused deposition modeling machine. Two types of slicing strategies, namely uniform slicing and variable slicing have been evaluated. In the uniform slicing, the slice thickness has been used for deposition is varying from 0.1 to 0.4 mm. In the variable slicing, thickness has been varied from 0.1 in the polar region to 0.4 in the equatorial region Time required and the number of slices required to deposit a hemisphere of 20 mm diameter have been compared with that using the variable slicing.

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“…The relationship between the maximum allowable cusp height and normal vector at any point on the tessellated model can be used to find the thickness of each layer. Many other researchers (Cormier et al, 2000;Jung and Ahluwalia, 2005;Pande and Kumar, 2008;Xu et al, 1997) used cusp height as an error measurement in their own algorithms. Measurement of all points on the top or bottom slice of a layer allows for calculation of the maximum allowable cusp height, leading to the division of the current thickness into small slices or keeping it at maximum thickness.…”

Section: Related Workmentioning

confidence: 99%

Close to CAD model curved-form adaptive slicing

Hayasi

Asiabanpour

2014

Rapid Prototyping Journal

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Purpose -The main aim of this study is to generate curved-form cut on the edge of an adaptive layer. The resulting surface would have much less geometry deviation error and closely fit its computer aided design (CAD) model boundary. Design/methodology/approach -This method is inspired by the manual peeling of an apple in which a knife's orientation and movement are continuously changed and adjusted to cut each slice with minimum waste. In this method, topology and geometry information are extracted from the previously generated adaptive layers. Then, the thickness of an adaptive layer and the bottom and top contours of the adjacent layers are fed into the proposed algorithm in the form of the contour and normal vector to create curved-form sloping surfaces. Following curved-form adaptive slicing, a customized machine path compatible with a five-axis abrasive waterjet (AWJ) machine will be generated for any user-defined sheet thicknesses. Findings -The implemented system yields curved-form adaptive slices for a variety of models with diverse types of surfaces (e.g. flat, convex, and concave), different slicing direction, and different number of sheets with different thicknesses. The decrease in layer thickness and increase of the number of the sloped cuts can make the prototype as close as needed to the CAD model. Research limitations/implications -The algorithm is designed for use with five-axis AWJ cutting of any kind of geometrical complex surfaces. Future research would deal with the nesting problem of the layers being spread on the predefined sheet as the input to the five-axis AWJ cutter machine to minimize the cutting waste. Practical implications -The algorithm generates adaptive layers with concave or convex curved-form surfaces that conform closely to the surface of original CAD model. This will pave the way for the accurate fabrication of metallic functional parts and tooling that are made by the attachment of one layer to another. Validation of the output has been tested only as the simulation model. The next step is the customization of the output for the physical tests on a variety of five-axis machines. Originality/value -This paper proposes a new close to CAD design sloped-edge adaptive slicing algorithm applicable to a variety of five-axis processes that allow variable thickness layering and slicing in different orientations (e.g. AWJ, laser, or plasma cutting). Slices can later be bonded to build fully solid prototypes.

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Specifying non‐uniform cusp heights as a potential aid for adaptive slicing

Cited by 65 publications

References 3 publications

Towards direct transformation of orthographic-view drawings into a prototype

Towards direct transformation of orthographic-view drawings into a prototype

A Review of Variable Slicing in Fused Deposition Modeling

Close to CAD model curved-form adaptive slicing

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