An algorithm for generating spiral tool path of shoe last with varying pitch

Hu, Jun; Luo, Lingen; Peng, Wen; Yao, Zhenqiang

doi:10.1007/s00170-007-1256-9

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Hu et al. 20 present an algorithm for generating spiral tool path of shoe last with toroidal cutter. The CL points are computed by interpolation based on the measurement data of mother last and the path spacing can be set with the interpolation parameters.…”

Section: Introductionmentioning

confidence: 99%

Elliptical torus cutter tool path generation based on minimum distance computation

Mingbo

Cai

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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In mould manufacture the elliptical torus cutters are used for their high cutting velocity, but the special geometry also brings issues in tool path generating and machining quality controlling. In this paper a guide curve tool path generating method for elliptical torus cutters is presented with the cutter location points computed by a minimum distance algorithm and the path spacing determined by an adaptive method. In the minimum distance algorithm, the calculation is resolved into an iterative process from point to freeform surface and an algebraic calculation process from point to elliptical torus surface considering the geometry of the cutter, which reduces the iterative process and improves the computing speed. In the adaptive path spacing method, the contacting geometry between the elliptical cutter and the workpiece surface is analysed and the relations among the scallop height, the tool tilt angle and the path spacing are deduced, based on which the guide curves are adjusted in advance to control the scallop height. Calculating examples and experiments are carried out, showing that the consuming time of cutter location (CL) points computation algorithm is reduced by 30% comparing to earlier method, and the adaptive path spacing method performs better than constant method in both scallop height controlling and tool path shortening. The results indicate that the presented tool path generating method can help to reduce both the machining and machine waiting time as well as ensuring the machining quality.

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Section: Introductionmentioning

confidence: 99%

Elliptical torus cutter tool path generation based on minimum distance computation

Mingbo

Cai

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…However, it is unable to generate evenly distributed toolpaths on the whole surface due to the inherent characteristics of the iso-parametric method. In addition, Hu et al [41] presented an algorithm for generating spiral toolpath of shoe last with varying pitch from the sampled points. Recently, double-spiral toolpath [42] and spiral toolpath with scallop height [43] are also presented.…”

Section: Introductionmentioning

confidence: 99%

Contour-parallel offset machining for trimmed surfaces based on conformal mapping with free boundary

Sun

Ren

Zhu

et al. 2011

Int J Adv Manuf Technol

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The parametric surfaces of some manufactured parts are often subjected to the Boolean operation of other objects; generating suitable NC tool paths from such trimmed surface remains a challenge. This paper presents a new planar development-based method to generate contour-parallel offset paths of trimmed surfaces. To avoid direct frequent identifications and removals of interferences of offset curves on 3D-trimmed surface possibly with multiple holes or restricted regions, the original surface is flattened in the plane domain using a two-stage approach which consists of conformal mapping with free boundary and further nonlinear accuracy improvement. Then, sequent offsets of the boundary curves of the planar region are generated, and the global interferences are detected and removed using an efficient and robust divide-and-conquer strategy. Based on a tree data structure, a tool-path linking algorithm is also given with less or no tool retractions, and subsequently, the resulting planar paths are inversely mapped to the physical space. Illustrated examples have been conducted to testify the affectivity and the applicability of the proposed contour-parallel offset machining method.

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