Focusing device and focusing method of laser cutting machine

A laser cutting machine, focusing mirror technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of error, affecting cutting effect, cutting surface traces, etc. Effect of high gas jet velocity
CN111168230AActive Publication Date: 2020-05-19JINAN BODOR LASER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JINAN BODOR LASER CO LTD
Publication Date
2020-05-19

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Abstract

The invention provides a focusing device of a laser cutting machine. The focusing device comprises an optical fiber joint, a shell, a sleeve, a sliding barrel, a light sensing mechanism, a linear motor, a protective mirror, a nozzle, a distance measuring mechanism, a beam splitter prism and a lens set. The optical fiber joint is arranged at one end of the shell. The sleeve is arranged on the sidewall of the shell and is provided with the sliding barrel in a sliding manner. The linear motor drives the sliding barrel to move. The light sensing mechanism is arranged in the sliding barrel. The beam splitter prism and the lens set are arranged in the shell. The protective mirror and the nozzle are arranged at the other end of the shell. According to the focusing device of the laser cutting machine, through multiple times of quantitative moving of the sliding barrel, the focal position is measured precisely, the focal position and the preset focal position are compared to form feedback, andtherefore focusing is achieved more precisely; and after precise focusing, the distance measuring mechanism is used for cooperating with a controller to adjust the laser cutting machine, it is guaranteed that the focal point is located on the surface of a workpiece, and the workpiece cutting effect is guaranteed.
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Description

technical field

[0001] The invention relates to the field of laser cutting equipment, in particular to a laser cutting machine focusing device and a focusing method thereof. 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] At present, the laser is often equipped with a focusing device, and the laser passes through the focusing lens in the focusing device again to reach the cutting surface; in order to obtain the best cutting effect, the focusing knob on the focusing device can be rotated to adjust the focusing mirror to change the laser beam. The optical path ...

Claims

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