Laser that monitors cutting status in real time

Abstract

The invention discloses a laser capable of monitoring cutting state in real time. A laser gain medium fiber core is wrapped by a glass isolation layer, a fluorescent material layer and an external wrapping layer from the inside out in sequence; the refractive index of the laser gain medium fiber core is larger than that of the glass isolation layer; the refractive index of the glass isolation layer is larger than that of the fluorescent material layer; and the refractive index of the fluorescent material layer is larger than that of the external wrapping layer. The input end and the output end of a 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 convex lens and a second convex lens are sequentially arranged between the clad fiber and a transmission fiber. A semi-reflection semi-permeable wafer is arranged between the first convex lens and the second convex lens; and the semi-reflection semi-permeable wafer and the light path are arranged in a manner that an acute angle is formed therebetween. When the cutter cuts a high-reflecting material, that laser wavelength surpasses a set threshold value can be detected in real time, so that the cutter can stop quickly to prevent the laser from returning in the original path; and response time is short due to light speed.

Description

technical field [0001] The invention relates to a laser device for real-time monitoring of cutting status, which belongs 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 e...

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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