Water-jet guided laser device based on positioning coupling

Abstract

The invention discloses a water-jet guided laser device based on positioning coupling. The device comprises a base, a focusing lens, a nozzle and a positioning module, wherein the nozzle is coaxially arranged on the base. The positioning module comprises a positioning disc and a gland, wherein the positioning disc is coaxially installed on the base, a coupling water chamber is formed between the base and the positioning disc, and liquid in the coupling water chamber is jetted out of the nozzle to form water jet flow; the focusing lens is a spherical lens or a hemispherical lens and is coaxially mounted in the positioning disc, the bottom of the focusing lens is arranged in the coupling water chamber in an overhanging manner, and a first sealing ring is arranged between the focusing lens and the positioning disc; the gland is arranged on the positioning disc and partially makes contact with the focusing lens, the gland and the positioning disc are connected through a fastener, and a second sealing ring is arranged between the gland and the positioning disc; and parallel laser beams enter the focusing lens, pass through the focusing lens and the coupling water chamber and then are coupled to the water jet flow to form water beam optical fibers. The water-jet guided laser device based on positioning coupling is simple in structure, and the distance from the lens to the water beam optical fibers can be reduced to the maximum extent.

Description

technical field [0001] The invention relates to a water-guided laser device, in particular to a water-guided laser device based on positioning coupling. Background technique [0002] Water-guided laser processing technology is based on the principle of total internal reflection, which can generate a laser beam completely contained in the water jet. The laser beam is reflected at the air-water interface with a lower density medium (the principle is similar to an optical fiber). The nozzle spreads to the surface of the workpiece along the micron-scale water beam, and the laser is used to ablate the workpiece; the water can be used to cool the cutting area, and the laser ablation debris is washed away in time. Compared with traditional laser direct ablation removal, the heat accumulation and burrs generated in water-guided laser processing are less, the surface of the processing area is smoother, and high-precision and straight-edge cutting effects can be obtained. Water-condu...

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Problems solved by technology

[0006] The structure of the water-conducting laser device described in the above invention is relatively complicated, and all involve self-focusing lenses, and self-focusing lenses are also called gradient refractive index lenses, and their refractive index distribution is a cylindrical optical lens that gradually changes along the radial direction. More difficult to fabricate than ball lenses

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