Method and device for improving heat release efficiency of heating wire by utilizing laser texturing processing

Abstract

The invention provides a method for improving the heat release efficiency of a heating wire by utilizing laser texturing processing. The method comprises the steps of adjusting ultra-fast laser energy to enable the focusing power density to be around a damage threshold of the heating wire; focusing ultra-fast laser on the surface of the heating wire through a focusing lens, and scanning the surface of the heating wire; and regulating the scanning speed of the ultra-fast laser, so that a sub-wavelength magnitude micro grating structure is generated on the surface of the heating wire. A device for implementing the method is composed of a laser energy adjuster, the focusing lens and a heating wire mounting rack, wherein the laser energy adjuster and the focusing lens are arranged on the same light path, and the heating wire mounting rack is disposed on the rear side of the focusing lens. According to the method and the device, the micro grating structure is prepared on the surface of the heating wire through the ultra-fast laser, and the cycle of the micro grating structure is set in the sub-wavelength magnitude, so that the heat radiating area of the heating wire can be greatly increased when the ultra-fast laser is focused on the surface of the heating wire, and the heat release efficiency of the heating wire can be improved.

Description

technical field [0001] The invention relates to the technical field of laser surface treatment, in particular to a method and a device for improving the heat release efficiency of a heating wire by adopting laser texturing treatment. Background technique [0002] Metal heating wires used in industry and life rely on their own resistance to convert electrical energy into heat, and then dissipate the heat through the surface. Traditional heating wires do not consider the issue of heat release efficiency. When too much heat accumulates inside the heating wire, the resistivity of the material will change, causing power instability or even blowing the device, and at the same time causing a waste of energy. Therefore, improving the heat release efficiency of the heating wire will have a beneficial impact on the safety and energy saving of electrical appliances. [0003] Laser surface treatment has the advantages of precise positioning, non-contact, rapid prototyping, etc. Howeve...

AI Technical Summary

Problems solved by technology

However, the general continuous laser or long pulse laser can only process large-diameter holes or micro-grooves on the surface of the material, and it is difficult to obtain a consistent micro-nano structure. At the same time, due to the existence of thermal effects, the surface layer of the material will melt , phase change and other processes, so that the material itself changes

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