Obtaining a spiral path for machining STL surfaces using non-deterministic techniques and spherical tool

Talón, José Luís Huertas; García-Hernández, César; Berges-Muro, Luis; Gella-Marín, Rafael

doi:10.1016/j.cad.2014.01.007

Cited by 14 publications

(7 citation statements)

References 29 publications

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“…By the conformal map, Sun et al [15] proposed a spiral cutting strategy which can realize cutting of mesh surface without tool retractions. In [16], Hernández et al also presented a spiral tool path generation method by the non-deterministic technique. In their method, the first 2D profile is created by projecting the part boundary on the z-plane and offset continuously toward inside, subsequently a 2D spiral path is constructed as a diagonal curve between two adjacent parallel profiles which is then projected onto the triangular mesh to form the spiral tool path.…”

Section: *Unmarked Marked Manuscriptmentioning

confidence: 97%

Smooth tool path generation for 5-axis machining of triangular mesh surface with nonzero genus

Sun

Jin

et al. 2016

Computer-Aided Design

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Section: *Unmarked Marked Manuscriptmentioning

confidence: 97%

Smooth tool path generation for 5-axis machining of triangular mesh surface with nonzero genus

Sun

Jin

et al. 2016

Computer-Aided Design

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“…(1) Projection-based methods [18][19][20]: This method is well known in commercial CAD/CAM systems, such as UG/NX [18]. It generates spiral tool path by projecting Archimedean spiral onto the design surface along a fixed direction.…”

Section: Introductionmentioning

confidence: 99%

Spiral Tool Path Generation Method on Mesh Surfaces Guided by Radial Curves

Sun

et al. 2018

Journal of Manufacturing Science and Engineering

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This paper presents a new spiral smoothing method to generate smooth curved tool paths directly on mesh surfaces. Spiral tool paths are preferable for computer numerical control (CNC) milling, especially for high-speed machining. At present, most spiral tool path generation methods aim mainly for pocketing, and a few methods for machining complex surface also suffer from some inherent problems, such as selection of projecting direction, preprocessing of complex offset contours, easily affected by the mesh or mesh deformation. To address the limitations, a new spiral tool path method is proposed, in which the radial curves play a key role as the guiding curves for spiral tool path generation. The radial curve is defined as one on the mesh surface that connects smoothly one point on the mesh surface and its boundary. To reduce the complexity of constructing the radial curves directly on the mesh surface, the mesh surface is first mapped onto a circular region. In this region, the radial lines, starting from the center, are planned and then mapped inversely onto the mesh surface, thereby forming the desired radial curves. By traversing these radial curves using the proposed linear interpolation method, a polyline spiral is generated, and then, the unfavorable overcuts and undercuts are identified and eliminated by supplementing additional spiral points. Spline-based technique of rounding the corners is also discussed to smooth the polyline spiral, thereby obtaining a smooth continuous spiral tool path. This method is able to not only greatly simplify the construction of radial curves and spiral tool path but also to have the ability of processing and smoothing complex surfaces. Experimental results are presented to validate the proposed method.

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“…By using the binary tree and real-time simulation, Mao and Liu et al [12] achieved a three-axis NC milling of the mesh. Huertas-Talón et al [13] used the non-deterministic techniques and spherical tool to obtain a spiral path for machining a mesh surface. In that work, the precision of machining a work-piece was tested using confocal microscopy and coordinate measuring machine (CMM).…”

Section: Introductionmentioning

confidence: 99%

Cutter location path generation through an improved algorithm for machining triangular mesh

Hao

Gao

Xiang

et al. 2017

Computer-Aided Design

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Direct mesh machining has been an effective technique in rapid manufacturing. Currently, the cutter location path generation is an effective method for the direct mesh machining. However, this method may cause surface defects, such as the overcut-slot, the transit-pit, and the facet defects. Therefore, the application of this method is limited for the machining accuracy issue. From the comprehensive analysis of cutter location path generation and the inspection of the machined parts by the mesh offset intersection (MOI) algorithm, the tessellation error of the offset mesh is the main factor causing the machining surface defects. To solve the problem, we propose an improved MOI algorithm to reduce the influence of tessellation error. Compared with the original surface, only the mesh vertices are considered as the points without tessellation error. Therefore, we revise the algorithm through calculating the cutter location points only from the vertices and smoothing the tool-path in two perpendicular directions. This improved algorithm includes two sub-algorithms: a vertex-based cutter location point calculation sub-algorithm and a bi-directional spline interpolation sub-algorithm. To validate the effectiveness of the improved algorithm, the machining accuracy is investigated and verified through several testing parts. The experimental results show that the improved MOI algorithm can effectively improve the machining accuracy and avoid surface defects on the work-piece surfaces.

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Obtaining a spiral path for machining STL surfaces using non-deterministic techniques and spherical tool

Cited by 14 publications

References 29 publications

Smooth tool path generation for 5-axis machining of triangular mesh surface with nonzero genus

Smooth tool path generation for 5-axis machining of triangular mesh surface with nonzero genus

Spiral Tool Path Generation Method on Mesh Surfaces Guided by Radial Curves

Cutter location path generation through an improved algorithm for machining triangular mesh

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