02049nam a2200253 a 4500 vtls000066750 KUKTEM 20251114204520.0 121121t2012 my da f m 000 0 eng d THE0006600(Local) 201905161104 amirul 201212051014 huda 201211211503 huda UMP TJ1191 .Z35 2012 rs Bc. Muhammad Zaid Mohamad Mohtar The effect of assist gas on the surface roughness for carbon dioxide laser cutting process / Muhammad Zaid Mohamad Mohtar Kuantan, Pahang : UMP, 2012 xv, 57 p. : ill. (some col.) ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Manufacturing Engineering) -- Universiti Malaysia Pahang - 2012 Bibliography : p. 56-57 This study focuses on the effect of assist gases on the surface roughness for Carbon Dioxide (CO2) laser cutting process. The analysis of the surface roughness has been determined by Surfcom 130A surface roughness tester which it place in laboratory. The material used for this experiment is acrylic sheet with 2.5 mm thickness. In this process the cut quality is very important. The parameters in laser cutting are cutting speed, keft width, laser power, chemistry of gas, nozzle exit parameter, nozzle design, thickness of the specimen and surface quality. In oxygen assist laser cutting, the gas plays two roles, one is to generated additional thermal energy during penetration and second role is to supply the shear force to the gas boundary to eject the molten metal formed during the cutting process. However, for this study, two parameters are selected. There are type of assist gas and gas pressure. Finally, the result show that the no assist gas with the lower pressure bars at certain speed is better quality on surface roughness cutting. Surface roughness Carbon dioxide lasers 0 0 0 1 20000 20000 2019-09-04 0 TJ1191 .Z35 2012 rs Bc. 0000067392 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 20000 20000 2019-09-04 0 CD 6257 | TJ1191 .Z35 2012 rs Bc. 0000067393 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 3371 3377 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992