Photoelectrochemical three-dimensional processing method and device of laser bubble cavitation

Abstract

The invention relates to a photoelectrochemical three-dimensional processing method and device of laser bubble cavitation, belonging to the non traditional combined machining field of the manufacturing technology. The method utilizes laser beam to irradiate the surface of workpieces in the solution and generate bubbles, as the bubble cavitation caused by bubble-collapsing combines with the electrochemical reaction so as to remove workpiece material under the action of photoelectrochemical reaction and realize etching and processing. In the device of the invention, a liquid crystal display of which the display of the grey level image is controlled by a computer is used as a mask plate, and when laser beam penetrates through the liquid crystal mask, an image with gray feature is generated to perform spatial modulation to the energy distribution in the laser spot. In the areas with higher laser radiation energy on the workpieces, the bubble cavitation is stronger, the speed of the photoelectrochemical reaction is higher and the etching removal rate is higher; in the areas with lower energy, the reverse happens, thus the processing of three-dimensional image can be realized. The device of the invention is applicable to the removal and processing of conductive metal material; and the display of the grey level image of the liquid crystal mask can be controlled by a computer, thus the processing efficiency of complex three-dimensional images can be increased greatly.

Description

technical field [0001] The invention relates to the field of special composite processing in manufacturing technology, in particular to a photoelectrochemical three-dimensional processing method and device of laser cavitation, which is suitable for non-contact three-dimensional forming processing of conductive metal materials. Background technique [0002] Electrochemical processing and laser processing are both special processing technologies. Among them, electrochemical machining is a manufacturing technology that uses electrochemical reactions to dissolve and remove workpiece materials to achieve forming processing. Laser processing is a manufacturing technology that uses a laser beam with high energy density to irradiate the surface of a workpiece to change its shape and structure. When the electrochemical reaction is irradiated by high-energy laser, a series of light, heat and nonlinear effects will be generated on the surface of the electrode, which will cause a photo...

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Problems solved by technology

In this method, when the laser beam passes through the electrolyte injection cavity, part of the energy of the laser will be absorbed by the electrolyte, and the refraction and scattering of the electrolyte will also affect the conduction of the beam, which will inevitably cause the loss of laser energy, and it is difficult to achieve laser energy. Efficient Transport in Electrochemical Machining Systems

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