THE INFLUENCE OF SOME INPUT FACTORS IN THE LASER BEAM CUTTING PROCESS ON THE SURFACE ROUGHNESS
Abstract
Laser beam cutting of metallic workpieces is a frequently used process nowadays, due to the possibilities of cutting according to predetermined contours and the relatively small size of the slit width resulting from cutting. The heights of surface asperities resulting from cutting depend on the values of some input factors in the cutting process. To obtain more information on the influence of some input factors in the laser beam cutting process on the surface roughness achieved by laser beam cutting, experiments were carried out in which the values of the laser beam power, cutting speed, gas pressure, and pulse frequency, respectively, were changed. The experimental results were mathematically processed, being established empirical mathematical models capable of highlighting the direction and intensity of the influence exerted by the input factors considered on the value of the roughness parameter Ra, for the two distinct areas of the surface resulting from laser beam cutting. If in the case of the area of penetration of the laser beam into the test sample, the factor with the greatest influence is the power of the laser beam, in the case of the surface through which the beam exits the test sample, the greatest influence is exerted by the frequency of the laser pulses.
References
2. Bâlc, N., Nonconventional technologies (in Romanian), Publishing House Dacia, Cluj-Napoca, (2001).
3. Coteață, M. Nonconventional manufacturing technologies. Course support (in Romanian), Publishing House PIM, Iași, (2021).
4. Slătineanu, L., Coteată, M., Gherman, L., Donac, G., Rîpanu, M., Laser cutting of thin parts. TEHNOMUS – New Technologies and Products in Machine Manufacturing Technologies, Vol. 1, No. 20, pp. 153-158, (2013).
5. Slătineanu, L., Nagîț, G., Dodun, O., Coteață, M., Munteanu, A., Beșliu-Băncescu, I., Gherman, A.-L., Hrițuc, A., Chinesta, F., Goncalves-Coelho, A., Teixeira, J.P., San Juan, M., Santo, L., Santos, F., Electrophysical and chemical manufacturing processes, Publishing House Tehnica Info, Chișinău, (2020).
6. Pradhan, A.K., Pattasani, T.P., Hota, D.K., Examination of surface roughness for laser cutting on acrylic sheets using response surface method, International Journal of Engineering Science Invention, Vol. 5, No. 7, pp. 96-101 (2016).
7. Radovanovic, M., Dasic, P. Some aspects of CO2 laser cutting. International Scientific Conference "UNITECH'01", Gabrovo, Bułgaria, pp. 99-104, (2001).
8. Radovanović, M., Dašić, P., Research on surface roughness by laser cut. Annals of the University "Dunărea de Jos" from Galati, Fascicle VIII: Tribology, Vol. 12, pp. 84-88, (2006).
9. Radovanovic, M., Madic, M., Experimental investigations of CO2 laser cut quality: a review, Nonconventional Technologies Review, No. 4, pp. 35-42, (2011).
10. Noor, M.M., Kadirgama, K., Rahman, M.M., Zuki, N.M, Rejab, M.R.M., Muhamad, K.F., Mohamed, J. J. Prediction modelling of surface roughness for laser beam cutting on acrylic sheets, Advance Material Research, Vol. 83-86, pp. 793-800, (2009).
11. Madić, M., Radovanović, M., Slătineanu, L.. Surface roughness optimization in CO2 laser cutting by using Taguchi method, Scientific Bulletin-University Politehnica of Bucharest, Series D, Vol. 75, No. 1, 97-106, (2013).
12. Nistoroschi, G., Theoretical and experimental contributions to the study of the laser beam machining process. Doctoral thesis (in Romanian), “Gheorghe Asachi” Technical University, Iași, (2013).
13. Cretu, G., Fundamentals of experimental research. Laboratory handbook (in Romanian), “Gheorghe Asachi” Technical University of Iași, Romania, (1992).
14. Crețu, G., Varvara, G., Experimental research methods in machine manufacturing (in Romanian), Publishing House Junimea, Iași, Romania, (1999).
15. Worthing, A.G., Geffner, J., Treatment of Experimental Data (in Romanian), Technical Publishing House, Bucharest, Romania, (1959).
