Optimal laser beam configurations for laser cutting of metal sheets

Rodrigues, Gonçalo Costa; Vorkov, Vitalii; Duflou, Joost R.

doi:10.1016/j.procir.2018.08.026

Cited by 14 publications

(8 citation statements)

References 12 publications

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“…Yet, high laser power was still required (> 500 W) [8,34]. Several studies demonstrated that the wavelength, beam angle, size, and quality play vital roles in laser-matter interactions [35][36][37].…”

Section: Resultsmentioning

confidence: 99%

Laser 3D printing of complex copper structures

Constantin

et al. 2020

Additive Manufacturing

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The ability to design complex copper (Cu) parts into the most efficient thermal structures is an old dream, but difficult to realize with conventional manufacturing techniques.The recent development of laser 3D printing techniques makes it possible to fully explore intricate designs and maximize the thermal performance of Cu-based thermal management components but present significant challenges due to its high optical reflectivity. In this study, we demonstrated the laser 3D printing of pure Cu with a moderate laser power (400 W). Dense Cu parts (95 %) with smooth surface finishing (Ra ~18 μm) were obtained at a scan speed of 400 mm/s, a hatch distance of 0.12 mm, and a layer thickness of 0.03 mm. The hardness, electrical, and thermal conductivity of the printed Cu parts are 108 MPa, 5.71×10 7 S/m, and 368 W/m•K, respectively, which are close to those of bulk Cu. Additionally, complex heat sink structures were printed with large surface areas (600 mm 2 /g), and their cooling performances were compared to a commercial heat sink with a smaller surface area (286 mm 2 /g) on an electronic chip. The complex heat sinks printed cools the electronic chip 45% more efficiently than the commercial one. The introduction of selective laser melting to additively manufacturing Cu heat sinks offers the promise to enhance the performance beyond the scope of exciting thermal management components.

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Section: Resultsmentioning

confidence: 99%

Laser 3D printing of complex copper structures

Constantin

et al. 2020

Additive Manufacturing

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“…Value Unit wavelength 10,600 nm maximum power 5000 W power consumption (1) 35 kW focal length 9.80 mm position shifts 0.05 mm average dispersion of position (2) 0.03 mm maximum thickness of the structural steel sheet 25 mm maximum thickness of the stainless steel sheet 20 mm maximum thickness of the aluminium alloy sheet 12.7 mm working area xy 4000 × 2000 mm 2 maximum weight of workpiece 1700 kg (1) at the maximum output power; (2) on the overall cut length. (1) 35 kW focal length 9.80 mm position shifts 0.05 mm average dispersion of position (2) 0.03 mm maximum thickness of the structural steel sheet 25 mm maximum thickness of the stainless steel sheet 20 mm (1) at the maximum output power; (2) on the overall cut length.…”

Section: Featurementioning

confidence: 99%

“…These different physical phenomena that govern the laser-material interaction mainly depend on chemical and physical properties of the material such as absorptivity, thermal conductivity, as well as the laser characteristics including wavelength and power density [1,2]. Melting cutting is by far the most common method for metal cutting, whereas vaporization cutting is typically used for materials with low vaporization energy and high irradiation lasers.…”

Section: Introductionmentioning

confidence: 99%

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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“…Costa Rodrigues et al addressed the problem of using an optimal configuration of the laser beam in the case of laser cutting of metal sheets. They have shown that from the energy point of view, it is possible to optimize input factors such as wavelength, polarization and beam shape, so as to ensure good quality surfaces for workpieces made of different materials and with different thicknesses [4].…”

Section: /1mentioning

confidence: 99%

Analysis of laser cut slots on different thickness steel plates

Olaru¹,

Coteaţă²,

Nagîț³

et al. 2021

Esaform 2021

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One of the processes used to separate parts from plate-type workpiece is laser beam cutting. The evaluation of the quality of the machined surfaces can be performed by taking into account the influence exerted by some input factors in the cutting process on the width of the slot and on the roughness of the surfaces generated by the laser beam cutting process. The paper presents the results of experimental research performed on a steel plate type workpiece. The objective pursued was to reveal the influence exerted by several input factors of the laser beam cutting process on some output parameters of this process. Empirical mathematical models corresponding to the output parameters taken into account were established. It was possible to order the input factors in the process by taking into consideration their weight in the values of the output parameters.

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Optimal laser beam configurations for laser cutting of metal sheets

Cited by 14 publications

References 12 publications

Laser 3D printing of complex copper structures

Laser 3D printing of complex copper structures

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

Analysis of laser cut slots on different thickness steel plates

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