Optical fiber laser cutting head for laser cutting system

Abstract

The invention relates to an optical fiber laser cutting head for a laser cutting system, comprising an optical fiber joint connected coaxially from top to bottom, a horizontal adjustment device, a focusing device, a protective mirror device, an air guiding device and a cutting head, and is characterized in that: In the focusing device, the focus tube is movably assembled in the slideway of the focus tube, the focus knob seat is fastened on the focus adjustment seat, the focus dial and the focus knob seat are fastened together, and the focus knob passes through the focus dial It is clamped in the inner hole of the focusing knob seat, and the focusing knob can rotate smoothly but cannot move axially; there is a slot on the outside of the connecting plate of the focusing tube, and an annular boss is arranged on the inner side of the focusing knob, and the center of the annular boss is aligned with the The rotation center of the focusing knob is offset, and the annular boss fits and is embedded in the card slot; the focusing lens is installed in the focusing barrel. The present invention has fast focus adjustment and can ensure cutting quality; the protective mirror is easy to disassemble and does not need to be adjusted after disassembly; the gas guiding device can effectively assist laser cutting and improve cutting quality.

Description

technical field [0001] The invention relates to an optical fiber laser cutting head for a laser cutting system, belonging to the technical field of laser processing. Background technique [0002] Laser cutting is to scan the surface of the material with a focused laser beam of high power density, heat the material to thousands or even tens of thousands of degrees Celsius in a very short time, so that the material is instantly melted or vaporized, and then the molten or vaporized material is removed from the cutting process by high-pressure gas. Blow away in the seam, so as to achieve the purpose of cutting the material. [0003] Fiber cutting is faster and more efficient than traditional cutting, with short processing time, small heat-affected zone, small thermal deformation and processing deformation. The focused spot of the laser beam is small, allowing finer micromachining, superior conduction and focusing performance, and easy control of power and energy. Compact and l...

AI Technical Summary

Problems solved by technology

However, due to the relatively small torque of manual adjustment and the loose coordination of related parts, it is easy to appear the problem that the position of the focus center changes after the focus length is adjusted, which affects the cutting quality

[0008] 2. In the protective mirror device, the service life of the laser head protective mirror is short, and it needs to be disassembled and replaced frequently in actual use

The airflow in this blowing method is vertically injected into the internal airway of the laser head, so the airflow direction in the interior is disordered, which reduces the gas flow velocity to a certain extent, thereby reducing the effect of auxiliary laser cutting

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