Modeling of the process of gas-laser cutting of a thin-walled tubular workpiece

Authors

DOI:

https://doi.org/10.20535/2521-1943.2024.8.2(101).300971

Keywords:

laser cutting, medical endoprosthesis, nozzle, auxiliary gas, pattern

Abstract

The main goal of these scientific studies, which are reflected in this work, is aimed at finding ways to improve quality indicators in the implementation of laser processing of tubular thin-walled blanks.
The analysis of literary sources showed that the majority of scientific research is aimed at improving the process of combined gas-laser cutting of relatively thick metal plates. Compared to this, the process of interaction of a focused laser beam and a flow of compressed gas with thin-walled tubular blanks is more complicated. Because it is necessary to take into account the effect of laser radiation on the lower part of the tubular workpiece, as well as the effect of gas pressure, which can distort the geometric configuration of the medical endoprosthesis.
After a thorough analysis of a priori information, a strategy of theoretical research was developed, followed by an adequacy check by obtaining experimental samples of medical endoprostheses. Namely, with the help of the Fluent 6.2 software package, the process of the propagation of the auxiliary gas jet at the outlet of the conical nozzle and its interaction with the tubular thin-walled workpiece was simulated.
A method of modeling the process of spreading the jet of auxiliary gas at the outlet of the conical nozzle has been developed.
Which made it possible to determine the limit values of the auxiliary gas pressure distribution along the axis of the nozzle at which deformation processes and distortion of the geometric configuration of the medical endoprosthesis occur.
According to the results of the modeling of the process of the interaction of the auxiliary gas with a cylindrical thin-walled blank, an experimental batch of blanks for medical endoprostheses with a diameter of 1.6 and 4 mm with the simplest "linear" design of the pattern and different thread lengths and a circle step equal to 0.16 mm was produced. Medical endoprostheses are widely used in medicine for the treatment of such dangerous diseases as thrombophlebitis.

References

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Published

2024-06-12

How to Cite

[1]
O. Stepura and P. Kondrashev, “Modeling of the process of gas-laser cutting of a thin-walled tubular workpiece”, Mech. Adv. Technol., vol. 8, no. 2(101), pp. 203–209, Jun. 2024.

Issue

Section

Up-to-date machines and the technologies of mechanical engineering