000			02049nam a2200253 a 4500
001			vtls000066750
003			KUKTEM
005			20251114204520.0
008			121121t2012 my da f m 000 0 eng d
020			_aTHE0006600(Local)
039		9	_a201905161104 _bamirul _c201212051014 _dhuda _y201211211503 _zhuda
040			_aUMP
090			_aTJ1191 .Z35 2012 rs Bc.
100	0		_aMuhammad Zaid Mohamad Mohtar
245	1	4	_aThe effect of assist gas on the surface roughness for carbon dioxide laser cutting process / _cMuhammad Zaid Mohamad Mohtar
260			_aKuantan, Pahang : _bUMP, _c2012
300			_axv, 57 p. : _bill. (some col.) ; _c30 cm. + _e1 CD-ROM
502			_aProject paper (Bachelor of Manufacturing Engineering) -- Universiti Malaysia Pahang - 2012
504			_aBibliography : p. 56-57
520	3		_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.
650		0	_aSurface roughness
650		0	_aCarbon dioxide lasers
999			_aVIRTUA40 _c3371 _d3377
999			_aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992