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IJERT-EMS

Investigations on Thermodynamic Behavior of CO2 Laser Cutting process


 Investigations on Thermodynamic Behavior of CO2 Laser Cutting process
Authors : Pawan Mishra, Dr.Tasmeem Ahmad Khan
Publication Date: 30-05-2012

Authors

Author(s):  Pawan Mishra, Dr.Tasmeem Ahmad Khan

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Vol.1 - Issue 3 ( May- 2012)

e-ISSN:   2278-0181

Abstract

In CO2 laser gas-assisted cutting process, modelling of the interaction mechanism is important. Consequently, the present study treats the complete problem of the interaction of the melting surface with the boundary layer and describes the behaviour of the melting layer. In the analysis, gas - liquid interface parameters are developed and relationships between the parameters influencing the cutting action are identified theoretically. To achieve this, effects of momentum and gas - liquid interface shear stress, due to the assisting gas jet, are considered. The approximate magnitude of the heat absorbed is estimated and melting layer thickness is predicted. An experiment is carried out and the theoretical predictions are compared with the experimental findings. First and second law efficiencies of the cutting process are predicted, which may, then, be used to improve the process. It is found that the assisting jet velocity increases the first and second law efficiencies of the CO2 laser cutting process.

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