Modeling of the Front of Melting and Destruction of a Melt Film During Gas-Laser Cutting of Metals

Ковалев, О. Б.; Orishich, A. M.; Петров, А. П.; Фомин, В. М.; Yudin, P. V.; Malov, Alexander N.; Ermolaev, G. V.

doi:10.1023/b:jamt.0000009185.27956.3a

Cited by 5 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To offer the best cutting quality, the right SOS, jet parameters, and power parameters should be chosen. 34 The SR under the optimal trial of front and back side was almost flat.…”

Section: Flc On Surface Qualitymentioning

confidence: 96%

“…This is due to the fact of less exposure time of the material with the CO 2 laser. 34 The higher SOS during FLC creates an uneven cutting because of diverge in angle from the reference axis. As a result of their contact, incomplete ejection of melted materials occurs at the cutting surface, an incorrect cut surface was produced.…”

Section: Model Adequacy Of the Coprasmentioning

confidence: 99%

See 1 more Smart Citation

Parametric assessment of surface behavior and the impact of heat in micro drilling of fiber laser machined AISI h13

Rubaiee

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

H13 is a tool steel with good strength to thermal cracking, and resistance to wear, and erosion. It is extensively employed in the manufacture of molds and dies. Because of its hardness, it is challenging to manufacture with traditional methods, and damages the surface during cutting, which lessens the effectiveness of components. Recently, laser cutting has become a possible method for achieving high rates of material removal. The use of laser cutting to manufacture complicated forms is a contemporary development in laser technique. The drilling on 0.44 mm thick H13 by 100 m fiber laser rays is highlighted in this study. Entropy using COPRAS is employed to optimize fiber laser settings for the drilled hole. Response surface analysis is utilized to determine correlation of fiber lasers process parameter and ANOVA validates the model. Further, ANN is used to predict the experimental results. In the current research, the laser’s output power, scanning speed, and duty cycle are all taken into account. The results of the tests revealed that laser power is the most important element affecting the quality of drilled holes. The optimum condition of COPRAS grade offers 4.27 µm of roughness, 89.89 µm of heat impacted zone, 139.595 µm of overcut, and 0.074113 mm of material removal rate. The observed and predicted figures are relatively near to each other, according to the experiments. The outcomes of the confirmation test (PO = 5 W, SOS = 10 mm/s, DC = 25%) demonstrate that optimal conditions provide greater surface precision than initial trails.

show abstract

“…To offer the best cutting quality, the right SOS, jet parameters, and power parameters should be chosen. 34 The SR under the optimal trial of front and back side was almost flat.…”

Section: Flc On Surface Qualitymentioning

confidence: 96%

Section: Model Adequacy Of the Coprasmentioning

confidence: 99%

Parametric assessment of surface behavior and the impact of heat in micro drilling of fiber laser machined AISI h13

Rubaiee

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…A theoretical analysis [21] of the above-mentioned adjoint problems in a two-dimensional formulation, experimental modelling and visualization [22,23] showed that a melt layer 10-30 µm thick is formed at the cut front in gas-laser cutting of materials (sheets up to 1 mm thick); the layer thickness strongly depends on thermodynamic parameters of the assist gas jet.…”

Section: Formulation Of the Problemmentioning

confidence: 99%

Mathematical modelling of striation formation in oxygen laser cutting of mild steel

Ermolaev

Ковалев

Orishich

et al. 2006

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A physicomathematical model is proposed for the phenomenon of formation of periodic striations in oxygen laser cutting of mild steel sheets. The mechanism of roughness origination is assumed to be caused by a cyclic reaction of iron–oxygen oxidation. The mathematical description is based on solving the adjoint problems of heat and mass transfer in the liquid phase and in the solid metal with nonlinear moving interfaces between the substances and phase changes. The motion of the boundaries occurs owing to metal melting under the action of focused laser radiation and the heterogeneous chemical reaction of iron oxidation in oxygen. The main feature of iron oxidation is the loss of protective properties of its oxide film due to melting. The general statement of the problem for the nonlinear heat-conduction equation with variable coefficients is formulated by the type of the Stefan problem solved with the use of the difference method with smoothing coefficients at the melting point and the fictitious domain method, which allows obtaining of the solution without explicit identification of the cut boundary and the phase-transition front. Results of numerical simulations of the shape and linear size of roughness as functions of the cutting velocity, purity of oxygen and thickness of the film of the iron oxide being formed are presented.

show abstract

Modeling of flow separation of assist gas as applied to laser cutting of thick sheet metal

Ковалев

Yudin

Зайцев

2009

Applied Mathematical Modelling

View full text Add to dashboard Cite

Modeling of the Front of Melting and Destruction of a Melt Film During Gas-Laser Cutting of Metals

Cited by 5 publications

References 6 publications

Parametric assessment of surface behavior and the impact of heat in micro drilling of fiber laser machined AISI h13

Parametric assessment of surface behavior and the impact of heat in micro drilling of fiber laser machined AISI h13

Mathematical modelling of striation formation in oxygen laser cutting of mild steel

Modeling of flow separation of assist gas as applied to laser cutting of thick sheet metal

Contact Info

Product

Resources

About