Unlock instant, AI-driven research and patent intelligence for your innovation.

Laser parameter automatic regulation and control method based on reflection spectrum

A reflection spectrum and laser parameter technology, applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problem that the process parameters cannot be adjusted before the target is ablated, and achieve the effect of ensuring non-destructiveness

Pending Publication Date: 2022-08-05
BEIJING UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the problem that the process parameters cannot be adjusted before the target is ablated in the laser processing process, and an automatic adjustment method for laser parameters based on reflection spectrum is invented

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser parameter automatic regulation and control method based on reflection spectrum
  • Laser parameter automatic regulation and control method based on reflection spectrum
  • Laser parameter automatic regulation and control method based on reflection spectrum

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0029] The invention is used for the cutting of stainless steel-carbon steel laminates. The optimum cutting laser process parameters for the stainless steel plate are: laser wavelength 1064nm, pulse width 600μs, average power 2000W, and the optimum cutting laser process parameters for carbon steel plates are: laser wavelength 10.6 μm, pulse width 300μs, average power 1500W, the laser process parameters can be adjusted in time before the target is ablated by reflection spectroscopy, so as to achieve the best cutting efficiency and cutting quality. The specific implementation is as follows:

[0030] Pulse frequency f of the machining laser L is 100Hz, the communication frequency f of the system T is 125Hz, according to the formula t≤(1 / f L -1 / f T ) / 2, the integration time of the spectrum acquisition system t≤1ms, in order to improve the signal reflectivity of the spectrum collection and improve the switching rate before the spectrum peak, the integration time of the spectrum ...

Embodiment 2

[0039] The invention is used for the laser cutting of oral and maxillofacial bones of isolated sheep, and the laser parameters can be adjusted by reflection spectrum: laser wavelength 2.1 μm, pulse width 500 μs, average power 30W, power density 150W / mm 2 , Turn off the laser in time before laser ablation of soft tissues such as nerves, so as to achieve the purpose of removing only the isolated bone tissue without damaging the soft tissues such as nerves in the isolated tissue. The specific implementation is as follows:

[0040] Pulse frequency f of the cutting laser L is 20Hz, the communication frequency f of the system T is 125Hz, according to the formula t≤(1 / f L -1 / f T ) / 2, the integration time of the spectrum acquisition system t≤21ms, in order to improve the signal reflectivity of the spectrum collection and improve the switching rate before the spectrum peak, the integration time of the spectrum acquisition is customized to 20ms;

[0041] The isolated oral and maxill...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a laser parameter automatic regulation and control method based on a reflection spectrum, and relates to the field of laser processing and automatic control. According to the method, before the target material is ablated by laser, laser parameters suitable for target material processing can be accurately debugged. Self-defining spectral integral parameters according to the laser frequency and the communication frequency, and collecting reflection spectrum data in the laser ablation process of the multi-component target material; extracting spectral characteristic parameters, and establishing a principal component regression model of the spectral characteristic parameters and laser parameters required by the target material to be ablated at the moment by taking 95% confidence interval as a standard; when the target material to be removed is exposed in the laser ablation process, the steps are repeated, and the laser parameters suitable for new target material ablation are debugged again; in the laser ablation process, real-time closed-loop regulation and control are conducted on laser parameters according to reflection spectrum data, and high-selectivity and lossless removal of the target material is achieved. The method has great application prospects in the fields of high-efficiency, high-quality and high-precision laser material processing and the like.

Description

technical field [0001] The invention relates to the field of laser processing and automatic control, in particular to a method for automatic regulation of laser parameters based on reflection spectrum. Background technique [0002] Laser processing has the advantages of high precision and fast efficiency. However, in the ablation process of multi-component materials, since the processing target is often a discontinuous medium, its structure is complex and changeable, and its components are various. If the laser parameters can be adjusted in time before the target to be removed is ablated, it is expected to greatly improve the laser Removal. In the traditional processing process, the operator needs to turn off the laser, and then adjust the laser parameters after distinguishing the properties of the target to be removed according to experience. Although the operator has rich professional knowledge and strong hands-on ability, the whole process is still time-consuming and lab...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K26/062B23K26/38B23K26/70
CPCB23K26/38B23K26/702B23K26/062
Inventor 季凌飞曹丽杰张犁天
Owner BEIJING UNIV OF TECH