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Fabrication of a Peristome Surface Structure of Nepenthes alata by Elliptical Vibration Cutting

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Abstract

The phenomenon of continuous directional water transport on the peristome surface of Nepenthes alata (N. alata) has been found to be of great significance to the applications of microfluids, anti-adhesion surface texture, lubrication and so on. Various methods are used to fabricate the bionic structure of the peristome surface. However, the size of processing area and the fabrication material are limited in the previous methods, which results in the limitation of the bionic structure applications. In order to solve the remained problems of small-scale and limited materials, the mechanical machining is creatively applied to the fabrication of bionic structure of peristome surface of N. alata in this paper. An elliptical vibration cutting system (EVC) driven by mechanical structure is designed and built to satisfy the size requirements of the bionic structure. The surface topographies corresponding to the tool trajectories of cutting and extrusion are obtained, respectively. The results demonstrate that both the two methods can realize the fabrication of bionic inclined microcavities while few defects can be seen on the extruded surface. According to the measured structure dimensions, it can be found the EVC system keeps a superior machining repeatability. As a consequence, the availability of the newly proposed method for the large-area fabrication of the bionic structure is verified.

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Abbreviations

x :

Tool displacement along cutting direction, μm

y :

Tool displacement along direction of depth of cut, μm

A :

Tool vibration amplitude in cutting direction, μm

B :

Tool vibration amplitude in direction of depth of cut, μm

v :

Cutting velocity, μm/s

φ :

Phase shift between vibrations of x-axial and y-axial directions, rad

f :

Tool vibration frequency, Hz

t :

Time, s

θ :

Instantaneous direction angle of the tool motion, rad

α :

Nominal clearance angle of tool, rad

β :

Wedge angle of tool, rad

L :

Cutting length, μm

h max :

Maximum cutting depth, μm

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Acknowledgements

The authors would like to thank the 4th CIRP Conference on Surface Integrity (CSI) Organizing Committee for the support of this research.

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Authors and Affiliations

  1. School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China

    Dongyue Wang, Xiangyu Zhang & Deyuan Zhang

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  1. Dongyue Wang
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  2. Xiangyu Zhang
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  3. Deyuan Zhang
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Correspondence to Deyuan Zhang.

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Wang, D., Zhang, X. & Zhang, D. Fabrication of a Peristome Surface Structure of Nepenthes alata by Elliptical Vibration Cutting. Nanomanuf Metrol 1, 209–216 (2018). https://doi.org/10.1007/s41871-018-0022-y

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  • DOI: https://doi.org/10.1007/s41871-018-0022-y

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