Laser cutting of thick steel and stainless steel plates

1988 ◽  
Author(s):  
Charles Williamson ◽  
Gregory E. Cox ◽  
Victor G. Gregson
Keyword(s):  
Stainless Steel ◽  
Laser Cutting ◽  
Steel Plates ◽  
Thick Steel

Improvement of cutting performance for thick stainless steel plates by step-like cutting speed increase in high-power fiber laser cutting

2018 ◽  
Vol 103 ◽  
pp. 311-317 ◽  
Author(s):  
Sangwoo Seon ◽  
Jae Sung Shin ◽  
Seong Yong Oh ◽  
Hyunmin Park ◽  
Chin-Man Chung ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fiber Laser ◽  
High Power ◽  
Laser Cutting ◽  
Cutting Speed ◽  
Cutting Performance ◽  
Steel Plates ◽  
Speed Increase

Laser cutting of thick steel plates and simulated steel components using a 30 kW fiber laser

2015 ◽  
Vol 53 (6) ◽  
pp. 916-920 ◽  
Author(s):  
Koji Tamura ◽  
Ryoya Ishigami ◽  
Ryuichiro Yamagishi
Keyword(s):  
Fiber Laser ◽  
Laser Cutting ◽  
Steel Plates ◽  
Thick Steel

Off-Axial, Gas-Jet-Assisted, Laser Cutting of 6.35-mm Thick Stainless Steel

1995 ◽  
Vol 117 (2) ◽  
pp. 272-276 ◽  
Author(s):  
M. J. Hsu ◽  
P. A. Molian
Keyword(s):  
Stainless Steel ◽  
Laser Cutting ◽  
Gas Flow ◽  
Cutting Speed ◽  
Steel Plates ◽  
304 Stainless Steel ◽  
Gas Jet ◽  
Process Conditions ◽  
Cut Edge ◽  
Machining Rate

A dual gas-jet, laser-cutting technique involving coaxial and off-axial oxygen gas flows was developed to cut 6.35-mm thick AISI 304 stainless steel plates with a 1.2-kW CO2 gas transport laser at a cutting speed of 12.7 mm/sec (30 in./min). Under identical process conditions, the single, coaxial gas jet could not cut the stainless steel although the cutting speed was reduced to 2.11 mm/sec (5 in./min). Thresholds of off-axial nozzle diameter, gas-impinging angle, oxygen pressure, and other process parameters were determined to obtain clean-cut edge quality (average dross height 0.25 mm). Experimental data coupled with a fluid-dynamics model of gas flow were presented to show the effectiveness of the dual gas-jet, laser-cutting method in achieving the maximum machining rate without deteriorating the quality of cut.

Acoustic and Optical Monitoring of High-Power CO2 Laser Cutting

2007 ◽  
Vol 344 ◽  
pp. 161-168 ◽  
Author(s):  
Johan De Keuster ◽  
Joost R. Duflou ◽  
Jean Pierre Kruth
Keyword(s):  
High Power ◽  
Laser Cutting ◽  
Quality Parameters ◽  
Steel Plates ◽  
Cut Edge ◽  
Edge Roughness ◽  
Cut Quality ◽  
Dross Formation ◽  
Photodiode Signal ◽  
Thick Steel

In this paper, the development of a monitoring system for high-power CO2 laser cutting of thick steel plates (>15 mm) is reported. The aim of this system is to increase the robustness and autonomy of the laser cutting process of thick plates, which is still characterized by more narrow process windows compared to cutting of thin sheets. The applicability for monitoring purposes of two types of sensors is investigated: the acoustic microphone and the photodiode. For both types, correlation between the sensor output and the cut quality is investigated. Both contour cutting and piercing are covered in the study. The full penetration of the piercing can be monitored by both sensors. Furthermore quantitative relations between cut quality parameters and photodiode signal parameters could be determined: the mean level of the photodiode signal correlates well with the drag of the striations and dross formation, whereas the standard deviation proves to correlate well with the occurrence of burning defects and the cut edge roughness.

Experimental investigation of underwater laser cutting for thick stainless steel plates using a 6-kW fiber laser

2021 ◽  
pp. 108896
Author(s):  
Seong Y. Oh ◽  
Jae Sung Shin ◽  
Seungkyu Park ◽  
Sungok Kwon ◽  
Sungmo Nam ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Fiber Laser ◽  
Laser Cutting ◽  
Steel Plates ◽  
Underwater Laser

scholarly journals Improved underwater laser cutting of thick steel plates through initial oblique cutting

2021 ◽  
Vol 141 ◽  
pp. 107120
Author(s):  
Jae Sung Shin ◽  
Seong Y. Oh ◽  
Seung-Kyu Park ◽  
Hyunmin Park ◽  
Jonghwan Lee
Keyword(s):  
Laser Cutting ◽  
Steel Plates ◽  
Oblique Cutting ◽  
Thick Steel ◽  
Underwater Laser

Study on the Laser Precision Cutting System and Stainless Steel Microporous Cutting Technology

2015 ◽  
Vol 817 ◽  
pp. 342-347 ◽  
Author(s):  
Shan Guo Han ◽  
De Tao Cai ◽  
Zi Yi Luo ◽  
De Jun Yan ◽  
He Xin Chen ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Power ◽  
Laser Cutting ◽  
Pulse Width ◽  
Gas Pressure ◽  
Steel Plates ◽  
Line Angle ◽  
Auxiliary Line ◽  
Cutting System

In order to improve the quality of laser cutting of stainless steel porous, the investigation on cutting 0.12mm stainless steel plates was carried out by a50W-powerbridgefiber laser cutting machine.The influence of the auxiliary line angle, laser power, and the pulse width and gas pressure on the cutting quality was studied in this paper.The results show that fewer defects was found on the samples when the cutting angle of auxiliary line was 90°and few splash orburrswas found on the samplesby 40 Wlaser power, with 56 μs pulse width and 1.3MPa gas pressure.

Monitoring of CO2 Laser Cutting of Thick Steel Plates by Means of a NIR Camera Based System

2009 ◽  
Vol 410-411 ◽  
pp. 207-216 ◽  
Author(s):  
Ehsan Fallahi Sichani ◽  
Johan De Keuster ◽  
Jean Pierre Kruth ◽  
Joost R. Duflou
Keyword(s):  
Monitoring System ◽  
Conceptual Design ◽  
Laser Cutting ◽  
Relevant Information ◽  
Steel Plates ◽  
Optical Analysis ◽  
Thick Steel ◽  
Set Up ◽  
Analysis Of The Images ◽  
General Aspects

An optical monitoring system has been developed by the authors aiming at real-time monitoring of laser cutting of thick plates of mild steel. This optical system uses photodiodes and a NIR camera as sensors. The concepts and results of the photodiode-based monitoring system have already been reported [1,2]. This paper is dedicated to the development of the optical set-up for camera-based monitoring of the laser cutting process. Firstly, some general aspects concerning the sensing principles and the conceptual design of the physical layout of the camera set-up are discussed. Based on a detailed optical analysis of the proposed conceptual design, some relevant information with regard to the selection of the camera type was obtained. Aspects related to the acquisition and analysis of the images, are highlighted. The initially developed camera set-up is presented. Firstly the design of the corresponding optical path is discussed in detail, including the results of the performed optical analysis. Next the results of the verification tests, performed on this physical set-up, are presented. Finally some preliminary results are included, proving the superior capability of the NIR camera compared to the photodiode-based solution for monitoring purposes.

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