Experimental investigation of the gas flow in gas-assisted laser cutting by means of geometrically similar models

N. K. Makashev; O. G. Buzykin; E. S. Asmolov

doi:10.1117/12.234197

1 March 1996 Experimental investigation of the gas flow in gas-assisted laser cutting by means of geometrically similar models

N. K. Makashev, O. G. Buzykin, E. S. Asmolov

Author Affiliations +

Proceedings Volume 2713, Fifth International Conference on Industrial Lasers and Laser Applications '95; (1996) https://doi.org/10.1117/12.234197
Event: Fifth International Conference on Industrial Laser and Laser Applications '95, 1995, Shatura, Moscow, Russian Federation

Abstract

The gas flow in the system of nozzle-cut is investigated for the case of gas-assisted laser cutting of materials. The direct measurement of pressure fields is used with geometrically similar models which simulate the configuration forming during the laser cutting of metal sheet. The effect of geometric parameters of the system on the flow pattern in the kerf and on its features responsible for the cutting quality is analyzed. The choice and proper implementation of the assisting gas blowing to the cut front zone if of great importance for the gas-assisted laser cutting. There exist many various methods and facilities for the gas delivery. Nozzle configurations of many kinds and the peculiarities of free jet streams formed by them was the subject of extensive exploration. The efficiency of the nozzle under investigation was evaluated empirically or by the pressure exerted to the flat plate in the stagnation point of normally impinging jet. Recently the attention of investigators has been redirected to the details of the gas flow in the cut kerf. This activity is connected with the development of the theoretical models of gas-assisted laser cutting which serves to appreciate the role of the gas flow parameters in the phenomena responsible for the cutting efficiency. The efficiency of the gas delivery which is characterized by the cutting speed, the maximum thickness of the cut material, or the quality parameters of cut edges depends mainly on the flow features in the cut kerf. In the present paper these features are discussed closely. The results of the investigation provide the ability to choose purposefully the geometrical parameters of the nozzle facilities for laser cutter.

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N. K. Makashev, O. G. Buzykin, and E. S. Asmolov "Experimental investigation of the gas flow in gas-assisted laser cutting by means of geometrically similar models", Proc. SPIE 2713, Fifth International Conference on Industrial Lasers and Laser Applications '95, (1 March 1996); https://doi.org/10.1117/12.234197

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