Effect of Focal length on surface roughness of 1mm thin Brass sheet by using assist gas O2
Laser cutting characteristics including power level and focal length are investigated in order to obtain surface roughness with maximum cutting speed. The surface roughness is investigated for a laser power range of 1000–1500W and focal length 122-132, gas pressure 7 bar constant for brass materials.This paper is studied the effect of focal length on surface roughness 1 mm thin brass sheet using an oxygen as assist gas. The cutting cross section was measured surface roughness. The variation was analyzed with laser power and focal length. We use here plasma detector sensor for predetermined cutting speed. The full factorial method is used for cutting speed and surface roughness.