Investigation of Machining Parameters Effect on Surface Roughness in Milling with Hexapod Machine Tool

In the last years hexapod machine tool with six degrees of freedom has got the attention of experts for achieving high dexterity and high speed machining. Free form surfaces are widely used in today industries. These surfaces are much encountered in aerospace, auto and other industries. Therefore machining of these surfaces is very important. For interpolation of free form surfaces, NURBS curves are commonly used. For investigating the quality of machined surface, final surface roughness is very important and is the most important feature of machined surface. In this study the effect of machining parameters such as cutting depth, feed rate and cutting speed on surface roughness were investigated. Design of experiments was done using Taguchi method. Then with using of neural network and genetic algorithm the best case for surface roughness was achieved. The cutting tool used in this study was ball end-mill and the work piece was aluminum of three thousand series. The results showed that cutting speed and depth of cut had the most effect on the surface roughness.