Lasers for Laser Cutting Machines

Abstract

The invention discloses a laser for a laser cutting machine. A clad fiber comprises a laser gain medium fiber core arranged in the middle. The laser gain medium fiber core is wrapped by a glass isolating layer, a fluorescent material layer and an outer cladding layer from the inside out in sequence. The input end and the output end of the clad fiber are provided with a first fiber Bragg grating and a second fiber Bragg grating respectively; the end surface, arranged at the side of a pump light source, of the clad fiber is provided with a tail mirror; a first lens and a second lens are arranged between the clad fiber and a transmission fiber in sequence; a low-pass filter mirror and a focusing mirror are sequentially arranged right under a semi-reflection semi-permeable lens from upward down; the focusing mirror receives reflection light from the semi-reflection semi-permeable lens; an imager is arranged at one side of the focusing mirror and is used for receiving light rays from the focusing mirror; and the cross section of the glass isolating layer is in D shape. Cutting speed is improved; high-power cutting can be tried, and cutting speed is fast and power redundancy is small; and laser energy can be utilized fully.

Description

technical field [0001] The invention relates to a laser used for a laser cutting machine, belonging to the technical field of laser cutting. Background technique [0002] The existing laser cutting process control method is mainly to complete the cutting process through the preset trajectory, speed and power of the program. There is a contradiction between efficiency and yield in the existing laser processing technology, such as perforation. In order to complete the perforation quickly, we hope to use high power to provide greater energy input, but the input energy is too high and it is easy to cause molten pool The violent gasification of the metal material in the medium causes an explosion, which causes the perforation to fail, and produces splashes that contaminate the lens. The traditional solution is to preset a relatively low power in the program, and take a long time to complete the piercing to ensure penetration, and reserve high redundancy to ensure the quality and...

AI Technical Summary

Problems solved by technology

There is a contradiction between efficiency and yield in the existing laser processing technology, such as perforation. In order to complete the perforation quickly, we hope to use high power to provide greater energy input, but the input energy is too high and it is easy to cause molten pool The violent gasification of the metal material in the medium causes an explosion, which causes the perforation failure, and produces splashes to contaminate the lens

The traditional solution is to preset a relatively low power in the program, and take a long time to complete the piercing to ensure penetration, and reserve high redundancy to ensure the quality and safety of the piercing. This method saves low processing efficiency. , too dependent on past experience and data, and it is difficult to achieve real-time control, because these problems are more prominent when processing new products

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