Rapid Prototyping of Art Sculptural Shapes According to the Sample

The main objective of the research covered in this paper is to present results for the quality of surfaces thermally cut with a laser beam. The variety of steel materials used as samples on which laser cutting is performed are the following Č.0146 (1.0330), Č.0147 (1.0333), Č.2131 (1.5024), SS Ferbec CR, HARDOX 450 and HARDOX 550. Thermal cutting is carried out with a CNC controlled Fiber laser BAYKAL type BLS–F–1530. The quality of the cut surface is analyzed based on varying the power of the laser beam, changing cutting speed and the type of additional gas (oxygen, air and nitrogen). By visual inspection, measuring the roughness of the cut surface and measuring the width of the intersection, it is determined the influence of the factors like type of the base material, type of gases, the power of thelaser beam and the cutting speed, in accordance with the standards DIN EN ISO 9013-2002 and the JUS C.T3.022.

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Experimental Determination of the Focal Length of a Laser Beam from the Output Nozzle of a Laser Cutting Head

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.756.71 ◽

2017 ◽

Vol 756 ◽

pp. 71-79

Author(s):

Martin Lachman ◽

Jiří Šafka

Keyword(s):

Laser Beam ◽

Laser Cutting ◽

Focal Point ◽

Focal Length ◽

Cutting Speed ◽

Vital Role ◽

Fibre Laser ◽

Cutting Head ◽

Industrial Operations

Laser technologies are considered to be unconventional technologies. Laser cutting is one of the most popular industrial operations that use a laser beam. Fibre lasers are most commonly used for cutting metallic materials. The aim of this paper is to experimentally demonstrate a procedure for determining the focal length of a laser beam from the output of the cutting head of a JK400FL fibre laser. Along with other factors, the correct position of the focal point of a laser beam cutting materials, plays a vital role in the quality of the cut and also in determining the cutting speed. It is possible to use a higher cutting speed of the laser machine, without compromising the quality of the cut.

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Fiber laser processing of GFRP composites and multi-objective optimization of the process using response surface methodology

Journal of Composite Materials ◽

10.1177/0021998318805139 ◽

2018 ◽

Vol 53 (11) ◽

pp. 1459-1473 ◽

Cited By ~ 4

Author(s):

Shiva Dayal Rao B ◽

Abhijeet Sethi ◽

Alok Kumar Das

Keyword(s):

Response Surface Methodology ◽

Fiber Laser ◽

Response Surface ◽

Process Parameters ◽

Heat Affected Zone ◽

Cutting Speed ◽

Kerf Width ◽

Laser Irradiance ◽

Input Process ◽

Cut Surface

In the present investigation, a continuous wave fiber laser with maximum power of 400 W was used to cut a glass fiber reinforced plastic sheet of 4.56 mm thickness using Nitrogen as assisting gas. The influence processing parameters such as laser irradiance, gas pressure, and cutting speed on the cut surface quality were investigated by using response surface methodology. The different responses of laser cut surface such as upper kerf width, taper percentage along the cut depth, and heat-affected zone on the top surface were measured to analyze the influence of input process parameters on the responses. A statistical analysis on the obtained results was conducted and found that the optimum values of different input process parameters were laser irradiance: 8.28 × 105 watt/cm2, cutting speed: 600 mm/min and assisting gas pressure: 7.84 bar. The corresponding values of responses were upper kerf width: 177.4 µm, taper 0.73%, and heat-affected zone on top surface: 109.23 µm. The confirmation experiments were conducted with the obtained optimum parameter setting and observed that the predicted values and experimental values for upper kerf width, taper percentage and top surface heat-affected zone were within the error limits of 2.52%, 1.84%, and 0.45%, respectively. Furthermore, damages like loose fibers, interlayer fractures, evaporation of matrix material and fiber breakages were observed.

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

Optics & Laser Technology ◽

10.1016/j.optlastec.2018.01.054 ◽

2018 ◽

Vol 103 ◽

pp. 311-317 ◽

Cited By ~ 6

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

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Effect of Laser Beam Diameter on Cut Edge of Steel Plates Obtained by Laser Machining

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.467.227 ◽

2013 ◽

Vol 467 ◽

pp. 227-232 ◽

Cited By ~ 4

Author(s):

Imed Miraoui ◽

Mouna Zaied ◽

Mohamed Boujelbene

Keyword(s):

Laser Beam ◽

Laser Cutting ◽

Steel Plates ◽

Beam Diameter ◽

Power Laser ◽

Laser Beam Diameter ◽

Machined Surface ◽

Cut Edge ◽

Thermal Influence ◽

Cut Surface

Laser cutting is a thermal process which is used contactless to separate materials. In the present study, high-power laser cutting of steel plates is considered and the thermal influence of laser cutting on the cut edges is examined. The microstructure and the microhardness of the cut edge are affected by the input laser cutting parameter: laser beam diameter. The aim of this work is to investigate the effect of the laser beam diameter on the microhardness beneath the cut surface of steel plates obtained by CO2 laser cutting. The cut surface was studied based on microhardness depth profiles beneath the machined surface. The results show that laser cutting has a thermal effect on the surface microstructure and on the microhardness beneath the cut section. Also the microhardness of the hardening zone depends on the laser beam diameter.

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Analysis of Roughness and Heat Affected Zone of Steel Plates Obtained by Laser Cutting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.974.169 ◽

2014 ◽

Vol 974 ◽

pp. 169-173 ◽

Cited By ~ 5

Author(s):

Imed Miraoui ◽

Mohamed Boujelbene ◽

Emin Bayraktar

Keyword(s):

Surface Roughness ◽

Laser Beam ◽

Heat Affected Zone ◽

Laser Power ◽

Laser Cutting ◽

Major Effect ◽

Steel Plates ◽

Beam Diameter ◽

Laser Beam Diameter ◽

Cut Surface

In the present study, high-power CO2 laser cutting of steel plates has been investigated and the effect of the input laser cutting parameters on the cut surface quality is analyzed. The average roughness of the cut surface of the specimens, produced by different laser beam diameter and laser power, were measured by using roughness tester. The scanning electron microscopy SEM is used to record possible metallurgical alterations on the cut edge. The aim of this work is to investigate the effect of laser beam diameter and laser power on the cut surface roughness and on the heat affected zone width HAZ of steel plates obtained by CO2 laser cutting. An overall optimization was applied to find out the optimal cutting setting that would improve the cut surface quality. It was found that laser beam diameter has a negligible effect on surface roughness but laser power had major effect on roughness. The cut surface roughness decreases as laser power increases. Improved surface roughness can be obtained at higher laser power. Also, laser beam diameter and laser power had major effect on HAZ width. It increases as laser power increases.

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Effect of focal position on cut surface quality in laser cutting of 50-mm thick stainless steel

International Journal of Modern Physics B ◽

10.1142/s021797922140018x ◽

2021 ◽

pp. 2140018

Author(s):

Moo-Keun Song ◽

Jong-Do Kim ◽

Dong-Sig Shin ◽

Su-Jin Lee ◽

Dae-Won Cho

Keyword(s):

Stainless Steel ◽

Laser Beam ◽

Laser Cutting ◽

Nuclear Power ◽

Surface Characteristics ◽

Kerf Width ◽

Power Structures ◽

Thick Sample ◽

Focal Position ◽

Cut Surface

In this study, the parameters for underwater laser cutting of 50-mm thick stainless steel, which is typically used in nuclear power structures, are investigated. The focal position of laser beam significantly affects the cutting quality. In particular, in the cutting of the thick sample, change in the focal position determines the kerf width and the roughness of the cut surface. Moreover, the effects of the variation of kerf width and the cut surface characteristics on the focal position of the laser beam are investigated. As the focal position moved to the inside of the material, the upper kerf width increased, but the quality of the cut surface was improved.

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Laser Cutting Quality of the Ceramic Slabs

Materials Science Forum ◽

10.4028/www.scientific.net/msf.505-507.847 ◽

2006 ◽

Vol 505-507 ◽

pp. 847-852 ◽

Cited By ~ 1

Author(s):

Xu Yue Wang ◽

Wen Ji Xu ◽

Ren Ke Kang ◽

Yi De Liang

Keyword(s):

Laser Power ◽

Laser Cutting ◽

Cutting Speed ◽

Cutting Parameters ◽

Incident Laser Power ◽

Focal Position ◽

Geometrical Features ◽

The Relationship ◽

Cutting System

An experimental analysis is presented which investigates the relationship between cutting parameters and the volume of material removal as well as its cutting quality on a Nd:YAG laser cutting system. The parameters that varied on two testing thickness during cutting include cutting speed, incident laser power and focal position in a continuous through cut. Various trends of the kerf geometrical features in terms of the varying process parameters are analyzed and shown to be reasonable. Discussions are also given on kerf geometry control in situations with cutting parameters. It shows that the effects of varying parameters such as cutting speed, laser power and focal position on cutting kerf width, surface roughness, and striation that have provided a deeper understanding of the laser machining.

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High Quality Fiber Laser Cutting of Electronic Alumina Ceramics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.154-155.917 ◽

2010 ◽

Vol 154-155 ◽

pp. 917-922 ◽

Cited By ~ 3

Author(s):

Xiao Chuan Chen ◽

Ling Fei Ji ◽

Yong Bao ◽

Yi Jian Jiang

Keyword(s):

Fiber Laser ◽

Laser Power ◽

Laser Cutting ◽

Cutting Speed ◽

Alumina Ceramics ◽

High Quality ◽

Spot Diameter ◽

Cutting Surface ◽

Power Threshold

In this paper, high quality cutting of 1 mm dense Al2O3 electronic ceramic processed by a fiber laser with spot diameter of 15 μm was reported. The narrow kerf with 30μm width was obtained with laser power of 100 W. 300 W is the laser power threshold of the kerf enlargement. Under higher laser power, the ceramics can be damage-free cut with higher cutting speed. Striation-free cutting could be achieved at 1000 W laser power with a cutting speed of 350 mm/s. The ratio of cutting speed to laser power for striation-free cutting was determined as 0.35. The black cutting surface was due to the mass tetragonal alumina induced by N2 as assist gas.

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The Influence of Different Assist Gases on Ductile Cast Iron Cutting by CO2 Laser

Archives of Foundry Engineering ◽

10.1515/afe-2017-0139 ◽

2017 ◽

Vol 17 (4) ◽

pp. 109-114 ◽

Cited By ~ 1

Author(s):

J. Meško ◽

R. Nigrovič ◽

A. Zrak

Keyword(s):

Cast Iron ◽

Laser Cutting ◽

Roughness Parameter ◽

Cutting Speed ◽

Nodular Cast Iron ◽

Ductile Cast Iron ◽

Engineering Practice ◽

Technological Parameters ◽

The Stability

Abstract This article deals with the technology and principles of the laser cutting of ductile cast iron. The properties of the CO2 laser beam, input parameters of the laser cutting, assist gases, the interaction of cut material and the stability of cutting process are described. The commonly used material (nodular cast iron - share of about 25% of all castings on the market) and the method of the laser cutting of that material, including the technological parameters that influence the cutting edge, are characterized. Next, the application and use of this method in mechanical engineering practice is described, focusing on fixing and renovation of mechanical components such as removing the inflow gate from castings with the desired quality of the cut, without the further using of the chip machining technology. Experimental samples from the nodular cast iron were created by using different technological parameters of laser cutting. The heat affected zone (HAZ), its width, microstructure and roughness parameter Pt was monitored on the experimental samples (of thickness t = 13 mm). The technological parameters that were varied during the experiments included the type of assist gases (N2 and O2), to be more specific the ratio of gases, and the cutting speed, which ranged from 1.6 m/min to 0.32 m/min. Both parameters were changed until the desired properties were achieved.

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