Electric liquid beam machining method for super-hydrophobic square column array with liquid drop cake-shaped bouncing

Abstract

The invention belongs to the technical field of micro machining, and provides an electric liquid beam machining method for a super-hydrophobic square column array with liquid drop cake-shaped bouncing. The method comprises the following steps that a metal plate is polished and cleaned to remove a surface oxide layer and oil stains; a metal workpiece and an organic glass nozzle are vertically arranged, the workpiece is connected with a positive electrode, a negatively polarized electrolyte is sprayed to a to-be-machined area through an organic glass spray head, a high-voltage direct-current power supply is connected for machining, and the metal workpiece moves along a planned track; the metal workpiece is subjected to ultrasonic cleaning to remove a residual solution and impurity products on the surface; and the obtained square column array is subjected to mixed liquid spraying treatment to obtain the super-hydrophobic square column array. The method has the advantages that the method is simple and easy to operate, the cost is low, the selectable material types are multiple, a cathode electrode is free of loss, the electrolyte can be repeatedly used after being filtered, the prepared square column array is small in height-diameter ratio, machining is easy, an array structure can be constructed on the surfaces of various metals, and the liquid drop cake-shaped bouncing function is achieved.

Description

technical field [0001] The invention belongs to the technical field of micromachining, and relates to an electro-hydraulic beam processing method of a super-hydrophobic square column array capable of realizing the cake-like bounce of liquid droplets on a metal substrate. Background technique [0002] When raindrops fall from the sky, due to the low temperature near the ground, they often freeze into a thin layer of ice on the contact surface. This weather phenomenon is called "freezing rain" in meteorology, and the freezing rain will continue to accumulate on the contact surface. When the freezing rain lasts for a long time, it is very easy to cause the breakage of trees, the collapse of power and communication towers, traffic accidents and flight delays, and the direct economic losses alone can reach tens of billions of yuan. For this reason people are looking for effective ways to reduce its adhesion to solid surfaces. In recent years, researchers have found that superhyd...

AI Technical Summary

Problems solved by technology

The superhydrophobic cone and square column arrays developed by Liu et al. have a diameter of about 20-100 μm and a height of about 800-1200 μm. Due to the small diameter and high aspect ratio of this type of structure, currently only the wire electric discharge method can be used. processed out

However, due to the small machining gap of micro-EDM, the tool electrode loss is more serious, and the electroetching products in the electrolytic machining process are not discharged smoothly, which is easy to cause short circuit and other phenomena that greatly affect the processing quality.

At the same time, micro-EDM has strict requirements on the stability of the power supply, the preparation of micro-electrodes and the precision of the control system, so the cost of this processing method is relatively high

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