Real-Time Monitoring and Control of Ultra-Fast Laser Engraving Process Utilizing Spectrometer

Ruutiainen, Mika; Roozbahani, Hamid; Alizadeh, Marjan; Handroos, Heikki; Salminen, Antti

doi:10.1109/access.2022.3156280

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…The optical signal intensity from Group 2 is significantly higher, which corresponds to the peak power variation of the laser as shown in Table 1. Ruutiainen et al [14] confirmed a correlation between laser output and radiation intensity in their study. The study found a positive linear relationship in the moderate to high power range.…”

Section: Resultssupporting

confidence: 52%

Monitoring laser weld penetration status from the optical signal

Aleem,

Yusof,

Ishak

2024

J. Phys.: Conf. Ser.

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Spectrometers have demonstrated their value in laser welding by facilitating the comprehension of welding dynamics and the identification of defects. However, the complex interaction between the laser beam and the material being welded makes it difficult for spectrometers to accurately capture the depth and extent of weld penetration, predominantly because plasma formation during welding interferes. This study presents an innovative approach that integrates laser technology, spectrometers, and advanced data analysis methods to classify and characterize various penetration types in pulse laser welding procedures, with notable computational efficiency. The research entailed the execution of an experiment on a boron steel plate, wherein peak power (1000-1200 kW), pulse duration (2-4 ms), and pulse repetition rate (25-50 Hz) were systematically varied to achieve diverse penetration conditions. Two categories of joints were identified based on their depth of penetration through careful analysis of the collected data. The investigation demonstrated a positive correlation between the depth of weld penetration and the increment of laser energy, with peak power ranging from 1000 kW to 1200 kW. Consequently, an elevation in light intensity was observed related to deeper weld penetration. The information is essential for understanding the relationship between laser energy and weld penetration, highlighting the importance of controlling laser parameters to achieve desired welding results. The spectrums were analyzed using Principal Component Analysis (PCA) to distinguish between different welding conditions. Overlap was observed between data from different weld conditions due to limitations imposed by the restricted dataset. Expanding the sample size can rectify this limitation and improve the accuracy and dependability of analytical outcomes. This study’s results provide valuable insights into optimizing welding parameters and improving understanding of the welding process, specifically in Tailor Weld Blanks. The findings offer potential for improving welding quality and strengthening lightweight components in high-performance industries like aerospace and automotive engineering.

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Section: Resultssupporting

confidence: 52%

Monitoring laser weld penetration status from the optical signal

Aleem,

Yusof,

Ishak

2024

J. Phys.: Conf. Ser.

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“…Spectrometers are considered in the classification of spectrally resolved techniques and are one the most successful optical sensors used for monitoring various laser processes by analyzing the radiation intensity of material [19], [24], [25]. They can measure a wide spectral range from gamma rays to microwaves; however, the monitored range generally encloses ultraviolet and visible wavelengths for laser material processing [16], [26], [27].…”

Section: ) Spectrometermentioning

confidence: 99%

“…Optical monitoring methods have a non-contact operation and provide a large amount of data based on the output of spatial or spectral techniques used [14], [16]. Different types of cameras, photodiodes, pyrometers, and spectrometers are examples of optical sensors that can be used for monitoring purpose [15], [17], [18], [19]. It should be noted that thermal methods can be included in the group of optical methods [16], [20].…”

Section: Introductionmentioning

confidence: 99%

Design and Development of a Multisensory Real-Time Monitoring Platform for Ultrafast Laser Engraving Process

et al. 2022

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Process online monitoring is a vital and integral part of high-speed laser scribing process in which speed and quality are paramount. In this study, a multi-sensory platform for real-time monitoring of the ultrafast pulsed laser engraving process has been developed. Four different sensors have been examined from various perspectives and the results have been analyzed and compared. The real-time monitoring system developed for this study consisted of IPG ytterbium pulsed fiber laser, scan head, illumination system, and four monitoring sensors, including a spectrometer, pyrometer, infrared (IR) camera, and high-speed camera. Various experiments were performed to evaluate the performance of the designed platform by applying each sensor to monitor a high-speed laser scribing process in real-time. The output of each sensor was analyzed by changing different laser and process parameters, such as laser power, focal position, beam speed, and pulse length. Strengths, weaknesses, and challenges of using each monitoring tool for the laser engraving process were discussed based on the obtained results.INDEX TERMS Laser scribing, Real-time monitoring, Spectrometer, High-speed camera, Infrared camera, Pyrometer.

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Surface enhancement of metallic alloys by laser precision engineering

Xin,

Fan,

et al. 2024

Weld World

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Real-Time Monitoring and Control of Ultra-Fast Laser Engraving Process Utilizing Spectrometer

Cited by 5 publications

References 19 publications

Monitoring laser weld penetration status from the optical signal

Monitoring laser weld penetration status from the optical signal

Design and Development of a Multisensory Real-Time Monitoring Platform for Ultrafast Laser Engraving Process

Surface enhancement of metallic alloys by laser precision engineering

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