Computationally intelligent modelling of the plasma cutting process

Lazarevic, Andjela; Ćojbašić, Žarko; Lazarevic, Dragoljub

doi:10.1080/0951192x.2020.1736635

Cited by 10 publications

(2 citation statements)

References 26 publications

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“…Plasma arc cutting is divided into transferred plasma arc cutting and non-transferred plasma arc cutting. The transferred plasma arc burns between the torch cathode and the sheet metal anode, mechanically compressing the arc column through the nozzle orifice, resulting in a high concentration of energy in the arc column [8]. Thus, the transferred plasma arc is extremely efficient for cutting sheet metal.…”

Section: Introductionmentioning

confidence: 99%

Study of Plasma Arc Underwater Penetration Processes in Steel Structures Covered with Non-conductive Materials

Liu,

Wang,

et al. 2023

J. Phys.: Conf. Ser.

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Recently, plenty of offshore platforms have faced decommissioning. Offshore steel structures covered with rust, mud, and barnacles require suitable cutting methods for their removal. The non-transferred plasma arc is highly efficient in cutting both conductive and non-conductive materials and is expected to play an important role in offshore demolition operations. This work aims to investigate the underwater penetration process of non-transferred plasma arcs on steel structures covered with non-conductive substances. The workpiece consisted of a 5 mm cement layer and a 10 mm steel plate, whose removal mass and hole morphology were recorded at several moments. It was found that the hole of the cement layer was larger than that of the steel plate, while the mass removal rate of the steel plate was much higher than that of the cement layer. The hole in the cement layer gradually changes from an inverted cone to a drum, and the hole in the steel plate is always an inverted cone. A combined heat source model with time variation is proposed based on the experimental results, and a 2D axisymmetric simulation model is developed. The error between the simulated and experimental hole dimensions was within 3.1%, proving that the proposed heat source model can reflect the heat process of the workpiece well.

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Section: Introductionmentioning

confidence: 99%

Study of Plasma Arc Underwater Penetration Processes in Steel Structures Covered with Non-conductive Materials

Liu,

Wang,

et al. 2023

J. Phys.: Conf. Ser.

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“…The most common methods include laser cutting, plasma cutting, water jet cutting, and oxy-fuel cutting [1][2][3]. Among them, plasma cutting is conducted by means of a concentrated plasma arc [4][5][6][7]. This approach was developed from plasma welding in the 1960s and emerged as a productive method of cutting sheet and plate metal in the 1980s.…”

Section: Introductionmentioning

confidence: 99%

Laser Cutting Technologies and Corresponding Pollution Control Strategy

Xie

et al. 2022

Processes

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In conjunction with the increasing demand for material cutting, such as the decommissioning and dismantling of nuclear facilities, advanced cutting technologies need be developed to increase precision and cost-effectiveness. As compared with other cutting technologies, laser cutting offers advantages of greater cutting precision, accuracy, and customization. In this work, we investigated the constitution, classification, and current status of this technology. Pollutant emission during laser cutting, corresponding pollution control methods and apparatus were proposed as well. Laser cutting equipment mainly comprises an automated system integrating a fiber laser, industrial computer, servo motor control, electrical control, and detection technology. It mainly consists of mechanical and electrical control parts. Laser cutting equipment is distinguished by light source, power, and cutting dimensions. Known variants of laser cutting technology involve vaporization, fusion, reactive fusion, and controlled fracture cutting. During the cutting process, dust, smoke, and aerosols can be released, which is an environmental concern and poses a threat to public health. The selection of the dedusting method and design of apparatus should take into account the dust removal rate, initial capital cost, maintenance cost, etc. Multi-stage filtration such as bag filtration combined with activated carbon filtration or electrostatic filtration is accepted.

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