Method for preparing dry bonded structure surface through direct metal laser ablation

Abstract

The invention provides a method for preparing a dry bonded structure surface through direct metal laser ablation. The method comprises the steps that a metal substrate and a metal foil are prepared, and a plurality of bristles simulating gecko seta structures are designed and distributed on the metal substrate in a dot matrix distribution mode; super-hydrophobic microstructures are prepared on thesurface of the metal substrate and the surface of the metal foil; and the metal foil is attached and fixed to the surface of the metal substrate, a laser precision spot welding technique is adopted,the metal foil and the metal substrate are subjected to anchor point welding according to an artificial metal bristle dot matrix, a pulse laser precision ablation technique is adopted, contours of theartificial metal bristles of the metal foil are cut according to artificial metal bristle contour figures of the artificial metal bristle dot matrix, and a cluster artificial metal bristle matrix isformed. The structure prepared through the method is a micro-nano cluster artificial metal bristle which is distributed in a matrix of any figure and is warped by a certain inclination angle in the horizontal direction, and the properties of high adhesion, easy detachment, self-cleaning and super-hydrophobicity of the metal surface based on the structure can be achieved.

Description

Background technique [0001] Laser processing is to irradiate the laser beam to the surface of the workpiece, and use the high energy of the laser to cut, melt the material and change the surface properties of the object. Since laser processing is non-contact processing, the tool will not directly rub against the surface of the workpiece to generate resistance, so the laser processing speed is extremely fast, the range of the processing object affected by heat is small, and no noise is generated. Since the energy of the laser beam and the moving speed of the beam can be adjusted, laser processing can be applied to different levels and ranges. [0002] Many creatures in nature have superior mechanical properties, and the most outstanding representative is the gecko. The sole of the gecko's foot is a multi-level, multi-fibrous surface structure. Each toe of the gecko has millions of tiny bristles. / 10), and the ends of the bristles are bifurcated to form hundreds of finer shove...

AI Technical Summary

Problems solved by technology

A larger surface can only be achieved by combining small pieces, which can cause problems with misalignment

There are many dry-bonded surfaces, but few of them are successfully used in engineering due to low-volume, high-cost manufacturing processes

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