High pressure water bath laser ablation and processing method

Abstract

The invention is a laser melting and processing method of high-pressure water bath, and its characteristic: it includes the following steps: placing the workpiece in a container with water, where the water surface is higher than the top surface of the workpiece by 1-10mm; regulating the water surface pressure at 5-6 atmospheric pressures; then making laser melting and processing. It not only can improve the surface appearance of a workpiece in a more micro melting region but also enhances mechanical property of the workpiece, and has the advantages of convenient use, low cost, environmental protection, etc.

Description

Technical field: [0001] The invention relates to laser processing, in particular to a high-pressure water bath laser ablation and processing method (hereinafter referred to as ablation). Background technique: [0002] In laser ablation, the workpiece to be ablated or the workpiece (hereinafter referred to as the workpiece) is generally exposed to the air. The surface of the workpiece after the action will have various shape defects and stress defects, and the machining accuracy will also be affected. In the improved method, nozzles are often used to spray inert gas or other gases (such as oxygen) on the ablation site to isolate the air and remove laser processing spatter during the ablation process, but this method can only improve the shape of the workpiece surface. However, the mechanical stress distribution of the workpiece cannot be improved at the same time; at the same time, the use of gas assist increases the difficulty of operation in some occasions; there is also a...

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Problems solved by technology

The surface of the workpiece after the action will have various shape defects and stress defects, and the machining accuracy will also be affected

In the improved method, nozzles are often used to spray inert gas or other gases (such as oxygen) on the ablation site to isolate the air and remove laser processing spatter during the ablation process, but this method can only improve the shape of the workpiece surface. However, the mechanical stress distribution of the workpiece cannot be improved at the same time; at the same time, the use of gas assist increases the difficulty of operation in some occasions; there is also an ordinary water bath environment to suppress the affected area of ​​​​laser ablation spatter, but the air bubbles generated during water vaporization are premature. Rapid expansion, when the ablation scale is too small, it will have a certain negative impact on the surface morphology of the workpiece after the action

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