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1. 2. 3. 4. 5. © Laser Cutting Quality Assessment And Thermal Efficiency Analysis Yilbas, BS ELSEVIER SCIENCE SA, JOURNAL OF MATERIALS PROCESSING TECHNOLOGY; pp: 2106-2115; Vol: ## King Fahd University of Petroleum & Minerals http://www.kfupm.edu.sa Summary Lasers are widely used in industry as cutting tools due to ultra flexibility of the cutting conditions, obtaining high quality end product, quick set up, non-mechanical contact between the workpiece and the too, and small size of the heat affected zone. In the present study, laser gas assisted cutting process is examined. Statistical method based on factorial analysis is introduced to identify the influence of cutting parameters on the resulting cut quality. International standards for thermal cutting is employed to identify the measurable variables when assessing the cut quality. Kerf width size is presented using scaling laws. Contribution of high temperature oxidation reaction in cutting due to assisting gas is accommodated in the analysis. First and second law efficiencies for laser cutting process are formulated. An experiment is conducted to assess the cutting quality and validate the Kerf width predictions. It is found that increasing laser beam scanning speed reduces the Kerf width while Kerf width increases with increasing laser output power. The main effects of all the parameters employed have significant influence on the resulting cutting quality. First law efficiency increases with increasing laser scanning speed, which substantiates as the workpiece thickness is doubled. (C) 2004 Elsevier B.V. All rights reserved. References: BELIC I, 1989, OPT LASER TECHNOL, V21, P277 BUNTING KA, 1975, ASME, V97, P116 CHEN SL, 1998, J MATER PROCESS TECH, V73, P234 DANISMAN K, 1992, OPT LASER TECHNOL, V24, P33 GONSALVES JN, 1972, J APPL PHYS, V43, P4684 Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa
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6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. © HSU MJ, 1995, J ENG IND-T ASME, V117, P272 JI Z, 1998, J MATER PROCESS TECH, V74, P89 KAR A, 1997, J LASER APPL, V9, P279 MODEST MF, 1996, INT J HEAT MASS TRAN, V39, P221 OLSEN FO, 1989, CIRP, V38, P215 PIETRO PD, 1995, INT J MACH TOOL MANU, V35, P993 POWER JB, 1985, PLANT CELL CULTURE, P37 PRASAD GVS, 1998, J MATER PROCESS TECH, V74, P147 ROMER GRBE, 1995, OPT QUANT ELECTRON, V27, P1397 SCHULZ W, 1989, P SOC PHOTO-OPT INS, V1132, P211 SHENG P, 1994, J MATER PROCESS TECH, V43, P145 SIMON G, 1989, P SOC PHOTO-OPT INS, V1132, P204 VANWYLEN G, 1994, FUNDAMENTALS CLASSIC YILBAS BS, 1987, J ENG MATER-T ASME, V109, P282 YILBAS BS, 1988, OPT LASER ENG, V9, P1 YILBAS BS, 1994, P I MECH ENG B-MANAG, V215, P1357 YILBAS BS, 1994, P I MECH ENG C-J MEC, V208, P275 YILBAS BS, 1996, J MATER PROCESS TECH, V58, P323 YILBAS BS, 1997, HEAT MASS TRANSFER, V32, P175 YILBAS BS, 1997, P I MECH ENG B-J ENG, V211, P223 YILBAS BS, 1998, J LASER APPL, V10, P71 YILBAS BS, 1998, OPT LASER ENG, V29, P17 For pre-prints please write to: bsyilbas@kfupin.edu.sa Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa
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