Grinding of riblets with “beaver tooth” multi-layer tools

Hockauf, Rolf; Asadi, Ebrahim; Denkena, Berend; Grove, Thilo; Wurz, Marc Christopher

doi:10.1016/j.procir.2018.05.089

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…When adopting conventional methods, the tools need to be dressed to be consistent with the structure. For example, when grinding micro bionic riblets, the grinding wheel is dressed as tooth along circumference [4]. Although the efficiency is high, the wear of the tools will cause the inconsistency of the structures.…”

Section: Introductionmentioning

confidence: 99%

Laser processing of micro/nano biomimetic structures

Xiao

Liu

et al. 2021

Micro & Nano Letters

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Inspired by nature, many researchers have noticed that the micro-and nano-structures originated from organism's surfaces which indict unique properties such as superhydrophobicity, drag reduction, structure colour have much use in academic value. However, conventional processing methods for mimicking biomimetic surface need multistep and is time wasted, not environmental friendly and uneconomic. Thanks to the development of ultrafast laser technology, the pulse duration can reach femtosecond scale, which can precisely realize micro-and nano-processing in one-step. Here, we introduce and demonstrate the principles of some typical properties. The typical structures caused by interaction between laser and material are discussed. Moreover, laser-processing methods for biomimetic surface are highlighted to achieve specialized performance. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Laser processing of micro/nano biomimetic structures

Xiao

Liu

et al. 2021

Micro & Nano Letters

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“…In terms of using pro led grinding wheels to grind riblets, Denkena B et al [7][8][9][10][11] conducted research on the in uence of grinding wheel wear, dressing, and feeding strategies on the generating mechanism of riblet surface during the riblet grinding process on the blade surface, and invented a simulated beaver tooth structured grinding wheel, which signi cantly improved the grinding e ciency; Xie J et al [12,13] achieved good drag reduction effects by grinding micro grooves (or riblets) on the front face of the turning tool and the revolution body surface through precise dressing with grinding wheels; Geng Z C et al [14] successfully achieved the grinding of micro grooves (or riblets) on the surface of ceramic samples by using nanosecond laser beams to trim diamond grinding wheels; Guo B et al [15,16] achieved the grinding of structured surfaces with groove and pyramid shapes by nely shaping V-shaped diamond grinding wheels using mechanical methods and dressing rough diamond grinding wheels using lasers.…”

Section: Introductionmentioning

confidence: 99%

A strategy of hob-grinding the cylindrical riblet surface for drag reduction using the grinding wheel with ordered abrasive pattern

Lyu¹,

Li²,

Shu³

et al. 2023

Preprint

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Riblet drag reduction surface is a biomimetic surface, and studying its manufacturing technology has practical significance for solving its engineering applications. Based on the principle of gear hobbing, a hob-grinding strategy for hob-grinding the cylindrical riblet surface of reducing drag using superhard grinding wheels with engineered spiral abrasive pattern is proposed. To achieve this method, firstly, based on the analysis of the geometric topology features of the riblet surface, an engineered CBN grinding wheel with spiral arrangement of abrasive particles was designed based on the principle of gear hobbing machining; Then, the relationship between hob-grinding parameters and abrasive particle arrangement parameters on the parameters of the ground riblets was analyzed, and the process measures to increase the number of riblets on the cylindrical surface, the ratio of the riblet height to spacing, and the impact on the surface geometry of the riblets were explored; Finally, the surface of the cylindrical riblet surface was ground through experiments. The research results indicate that using this strategy can grind the cylindrical riblet surface, and the proposed process strategy of increasing the number of riblets and the ratio of the height to spacing is feasible.

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“…In addition, based on the principles of bionics, the self-sharpening performance of the blades was optimized from the aspects of surface coating, composite structure, serrated shape, etc. by analyzing the biological characteristics of teeth such as those of beavers and sharks [13,14]. However, in the existing studies, there are few reports on the correlation between self-sharpening blades and the low-damage crop cutting mechanism and growth status of crops after cutting.…”

Section: Introductionmentioning

confidence: 99%

Study on Low-Damage Cutting of Alfalfa Stalks by Self-Sharpening Blades of Gradient Material with Carbon-Nitron-Boronized Heat-Treatment

Bai

Ren

et al. 2022

Coatings

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The work aims to realize low-damage cutting of Alfalfa stalk. The self-sharpening blades of gradient material were prepared by 40 Cr steel, then heat-treating the flank surface by carbon-nitron-boronized with a rare elements catalysis technique. The biological characteristics of Alfalfa incision self-healing and regeneration process were analyzed in order to compare the cutting effects of different blades. After treatment with carbon-nitron-boronized with rare elements catalysis, the flank surface and tip point of blades were coated by boride layer and carbonitriding layer. The composition, microstructure and properties of the carbon-nitron-boronized layer demonstrated a gradient distribution state, and had good wear resistance. A kinetic model for the formation of the carbon-nitron-boronized layer was proposed. The initial stage of heat-treatment was mainly a carbonitriding process. When continuous and compact boride was formed on the surface, it was mainly boridized. The results of field experiment indicated that compared with the commercial blades, the self-sharpening blades have excellent properties as wear resistance and long service life. In addition, the cut damage caused by the self-sharpening blades was less, the self-healing and regeneration process of Alfalfa stalk was normal, and the regeneration duration was greatly shortened. The blades with carbon-nitron-boronized heat-treatment could form the self-sharpening characteristics, always maintaining the cutting sharpness, and realized the low-damage cutting of Alfalfa stalk.

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Grinding of riblets with “beaver tooth” multi-layer tools

Cited by 9 publications

References 4 publications

Laser processing of micro/nano biomimetic structures

Laser processing of micro/nano biomimetic structures

A strategy of hob-grinding the cylindrical riblet surface for drag reduction using the grinding wheel with ordered abrasive pattern

Study on Low-Damage Cutting of Alfalfa Stalks by Self-Sharpening Blades of Gradient Material with Carbon-Nitron-Boronized Heat-Treatment

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