01801nam a2200205 a 4500001001400000003000700014005001700021008004100038020002200079040000800101100003300109245012700142260003400269300005600303502009500359504002800454520106500482650002201547650002601569vtls000066750KUKTEM20251114204520.0121121t2012    my da  f m    000 0 eng d  aTHE0006600(Local)  aUMP0 aMuhammad Zaid Mohamad Mohtar14aThe effect of assist gas on the surface roughness for carbon dioxide laser cutting process /cMuhammad Zaid Mohamad Mohtar  aKuantan, Pahang :bUMP,c2012  axv, 57 p. :bill. (some col.) ;c30 cm. +e1 CD-ROM  aProject paper (Bachelor of Manufacturing Engineering) -- Universiti Malaysia Pahang - 2012  aBibliography : p. 56-573 aThis 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. 0aSurface roughness 0aCarbon dioxide lasers