Numerical simulation of the shape of laser cut for fiber and CO2 lasers

Zaitsev, Alexandr V.; Ermolaev, G. V.; Polyanskiy, T. A.; Gurin, A. M.

doi:10.1063/1.5007504

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…As consequence, in these applications, the absorptivity of the CO 2 laser beam can be even higher than that of the solid-state laser beam. In addition, the distribution of the coefficient of absorptivity on the cut front is more uniform in CO 2 laser cutting, whereas it shows a large drop in the middle of the workpiece thickness in fiber laser cutting [8]. The minimum roughness is related to the absorbed laser energy per unit volume of the removed metal for both laser types regardless of thickness [9].…”

Section: Introductionmentioning

confidence: 95%

Experimental Investigation of Industrial Laser Cutting: The Effect of the Material Selection and the Process Parameters on the Kerf Quality

et al. 2020

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Laser beam cutting is a non-contact, production-flexible and highly productive technique that allows accurate profiling of a wide range of sheet materials. To these and further benefits, laser machining is increasingly being adopted by industry. This paper investigates the effect of material type, workpiece thickness, cutting speed and assistant gas pressure on cut quality for industrial-relevant applications using a CO2 laser. AlMg3 aluminum alloy, St37-2 low-carbon steel and AISI 304 stainless steel were selected to represent the most established materials in many industrial fields and gain insight into different processes (i.e., inert-assisted fusion cutting and oxygen cutting) and absorption behaviors with respect to CO2 laser wavelength. The aim was to enhance the understanding of the mechanisms through which laser cutting parameters and workpiece parameters interact in order to identify general criteria and well-optimized process parameters which guarantee the kerf quality. The quality of laser cut was analyzed in its basic terms: kerf geometry, surface roughness and cut edge quality. The experiments were performed by using a systematic experimental design approach based on Design of Experiments, and the results were validated via Analysis of Variance. Quality assessment was presented and discussed. The visual inspection of cut sections confirms good overall quality and limited presence of laser cut imperfections. The experimental investigation demonstrates that the different materials can be successfully processed within a wide range of the tested values. In addition, optimum cutting conditions which satisfy the straight requirement of the quality standard adopted are identified for each material. This study involves an analysis of both phenomenological and practical issues.

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Section: Introductionmentioning

confidence: 95%

Experimental Investigation of Industrial Laser Cutting: The Effect of the Material Selection and the Process Parameters on the Kerf Quality

et al. 2020

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“…Among the results obtained, it is noted that laser and plasma cutting determined an increase in surface layer hardness up to 490 HV [ 34 ]. Zaitsev et al used both types of laser to cut 1.5 and 8 mm thick steel [ 35 ]. The researchers noted that both lasers have the same intensity distribution as the absorbed energy.…”

Section: Literaturementioning

confidence: 99%

Study of the Relationship between Entropy and Hardness in Laser Cutting of Hardox Steel

Girdu

Gheorghe

2023

Materials

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The article presents the findings of a study on the machining of 10 mm thick Hardox 400 steel plates using the CO2 laser. The purpose of the investigation was to investigate the relationship between the entropy and the hardness of machined surfaces. For this purpose, a new mathematical model is established to estimate the entropy, and its influence on the hardness is determined. The mathematical model is statistically and experimentally validated. An entropy variation ΔS = −330 mJ/K between 2 K is found, causing a decrease in hardness compared to the standard value. The influences of input parameters (laser power, cutting speed, and auxiliary gas pressure) on hardness are determined. It is demonstrated that the surface hardness is strongly influenced by the auxiliary gas pressure. The combination of laser power P = 4200 W with gas pressure p = 0.45 bar at average cutting speed v = 1400 mm/min leads to a hardness of 38 HRC, extending the life and wear resistance of the cut parts.

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“…The authors conclude that the intensity distribution of the absorbed energy is the same for both types of lasers. The intensity of the radiation varies depending on the thickness of the material and the overheating of the walls remains a problem with the fibre laser [48].…”

Section: Synthesis Of Literaturementioning

confidence: 99%

Energy Efficiency in CO2 Laser Processing of Hardox 400 Material

Girdu

Gheorghe

2022

Materials

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The use of laser technology for materials processing has a wide applicability in various industrial fields, due to its proven advantages, such as processing time, economic efficiency and reduced impact on the natural environment. The expansion of laser technology has been possible due to the dynamics of research in the field. One of the directions of research is to establish the appropriate cutting parameters. The evolution of research in this direction can be deepened by determining the efficiency of laser cutting. Starting from such a hypothesis, the study contains an analysis of laser cutting parameters (speed, power and pressure) to determine the linear energy and cutting efficiency. For this purpose, the linear energy and the cutting efficiency were determined analytically, and the results obtained were tested with the Lagrange interpolation method, the statistical mathematical method and the graphical method. The material chosen was Hardox 400 steel with a thickness of 8 mm, due to its numerous industrial applications and the fact that it is an insufficiently studied material. Statistical data processing shows that the maximum cutting efficiency is mainly influenced by speed, followed by laser power. The results obtained reduce energy costs in manufacturing processes that use the CO2 laser. The combinations identified between laser speed and power lead to a reduction in energy consumption and thus to an increase in processing efficiency. Through the calculation relationships established for linear energy and cutting efficiency, the study contributes to the extension of the theoretical and practical basis.

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Numerical simulation of the shape of laser cut for fiber and CO2 lasers

Cited by 9 publications

References 7 publications

Experimental Investigation of Industrial Laser Cutting: The Effect of the Material Selection and the Process Parameters on the Kerf Quality

Experimental Investigation of Industrial Laser Cutting: The Effect of the Material Selection and the Process Parameters on the Kerf Quality

Study of the Relationship between Entropy and Hardness in Laser Cutting of Hardox Steel

Energy Efficiency in CO2 Laser Processing of Hardox 400 Material

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