Global tool path optimization of high-resolution image reproduction in ultrasonic modulation cutting for structural coloration

Yang, Yang; Guo, Ping

doi:10.1016/j.ijmachtools.2018.11.002

Cited by 37 publications

(4 citation statements)

References 28 publications

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“…Because studies in the literature generally use benchmark tool paths instead of industrial NCfile, the polyline analysis algorithm is ignored [12,13]. The tool paths in a benchmark path are directly in the path smoothing criteria, and all points in the paths are fitted to a parametric curve [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Fast and High Precision Control Approach: Polyline Analysis and Optimal NURBS Interpolation for CNC Machine Tools

Kelekçi,

Kizir

2024

Preprint

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In CNC operations, smooth motions generated using a parametric curve such as NURBS, Bezier curve, and B-spline are crucial for surface quality and machine control. A parametric curve is formed by microlines in CAD/CAM software; however, instead of microlines, polylines are used to define a parametric curve to prevent an increase in NC-file size. It is also possible to see situations where smooth motion is not required due to production requirements. In these cases, point-to-point motion is necessary instead of smooth motion. In this study, a polyline analysis algorithm is proposed to classify the normal line and polyline within the NC-file. A global tool path smoothing method is also applied, where the data points in a polyline group are converted into NURBS because CAD/CAM software commonly uses NURBS as a parametric curve for precision control of CNC machines. In addition, this study presents an optimal feedrate scheduling algorithm for the NURBS curve that generates an optimal feedrate profile for each segment by considering critical parameters such as segment length, initial and final velocity of each segment, maximum jerk, acceleration, and velocity. As the proposed algorithm is compatible with existing feedrate scheduling methods in which different feedrate values at the transition point of the NURBS segments are determined, this study provides an important contribution to the literature. The proposed methods in this study are verified by operating a spherical surface using industrial NC-files on a 3-axis CNC-Milling machine. The proposed methods demonstrate effective performance in experiments that require precision production operations.

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Section: Introductionmentioning

confidence: 99%

Fast and High Precision Control Approach: Polyline Analysis and Optimal NURBS Interpolation for CNC Machine Tools

Kelekçi,

Kizir

2024

Preprint

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“…Although these methods can produce smaller microstructures, their complex procedures and harsh conditions have hindered their further development. Regarding large-area anisotropic wedge structures, machining technology has attracted great interest due to its high precision and high efficiency. − Tricinci et al faithfully reproduced the hierarchical shape of gecko setae via two-photon lithography and studied its effects in terms of its adhesion and friction performances . However, this process is very slow, and large-area preparation is not possible.…”

Section: Introductionmentioning

confidence: 99%

Gecko-Inspired Biomimetic Surfaces with Annular Wedge Structures Fabricated by Ultraprecision Machining and Replica Molding

et al. 2021

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The current research on gecko-inspired dry adhesives is focused on micropillar arrays with different terminal shapes, such as flat, spherical, mushroom, and spatula tips. The corresponding processing methods are mostly chemical methods, including lithography, etching, and deposition, which not only are complex, expensive, and environmentally unfriendly, but also cannot completely ensure microstructural integrity or performance stability. The present study demonstrates a high-precision, high-efficiency, and green method for the fabrication of a gecko-inspired surface, which can promote its application in dexterous robot hands and mechanical grippers. Based on the bendable lamellar structures of the gecko, annular wedge adhesive surfaces that stick to the finger surfaces of dexterous robot hands to improve their load capacity are proposed and fabricated via a suitable combined processing method of ultraprecision machining and replica molding. The greater the width, the higher the replication integrity, and when the minimum width is 20 μm, the replication error is less than 5.5% due to the superior processing performance of the nickel–phosphorus (Ni–P) plating of the master mold. The fabricated annular wedge structures with an optimized width of 20 μm not only exhibit a strong friction force of up to 35.48 mN under a preload of 20 mN in the GCr15/poly(dimethylsiloxane) (PDMS) friction pair but also demonstrate an obviously improved anisotropic friction characteristic of up to λ = 1.36, as the molecular force exhibits a stronger increase as compared to the decrease of the mechanical force of the structure with a small width.

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“…High frequency periodic separation has the advantages of small average force, high efficiency and high surface quality [2], [3]. The researches on ultrasonic machining cover wide ranges, such as the problem of the boundary damage of rotary ultrasonic machining [4], the investigation on machining performance of two-dimensional ultrasonic machining [5], the separation phenomenon of ultrasonic machining [6], and the application of anti-counterfeiting of surface microstructure through by two-dimensional ultrasonic machining [7]. Moreover, researchers have also done a number of studies on ultrasonic polishing.…”

Section: Introductionmentioning

confidence: 99%

A New Vibration Device Applied for Two-Dimensional Ultrasonic Polishing of Biomaterials

Lin

Yan

et al. 2019

IEEE Access

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For the research of the performance of two-dimensional ultrasonic polishing (TDUP) on the biomaterials, a new vibration device was designed. Meanwhile, our aim is to study the mechanism of multiangle polishing to cope with the complex structure of biomaterials. The device is composed of piezoelectric rings, asymmetric transformer, ultrasonic generator, and so on. The structural dimension parameters were optimized by finite element analysis, and especially the groove size on the transformer was discussed in detail. Two kinds of experiments had been conducted to test the performance of the proposed device, including impedance analysis experiments and amplitudes measurement experiments. Furthermore, a mechanical model to explain the principle of the multiangle polishing was set up, which could assist to analyze the influence of different polishing angles in terms of machining. Finally, the machining experiments and multiangle polishing experiments were carried out to verify the effectiveness of the device. Compared with traditional mechanical polishing, the surface roughness is reduced from 235 nm to 140 nm. The results of multiangle polishing experiments indicate that the surface quality of biomaterials will be prominently affected by different polishing angles. In addition, the polishing mechanism will transform owing to the inversion of the normal velocity during the polishing process with the angle increasing. The surface morphology will also be affected. It has been proven that the experimental results agree with the model well.

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Global tool path optimization of high-resolution image reproduction in ultrasonic modulation cutting for structural coloration

Cited by 37 publications

References 28 publications

Fast and High Precision Control Approach: Polyline Analysis and Optimal NURBS Interpolation for CNC Machine Tools

Fast and High Precision Control Approach: Polyline Analysis and Optimal NURBS Interpolation for CNC Machine Tools

Gecko-Inspired Biomimetic Surfaces with Annular Wedge Structures Fabricated by Ultraprecision Machining and Replica Molding

A New Vibration Device Applied for Two-Dimensional Ultrasonic Polishing of Biomaterials

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