Influence of Radial Finishing Trajectories to the Roughness Obtained by Milling of Spherical Surfaces

The paper aims at studying the influence of the radial trajectory in finishing a spherical surface on the roughness obtained using a toroidal milling cutter. A mathematical model is proposed with entry values represented by the technological parameters (cutting speed, pitch speed), the tool's geometrical parameters (tool diameter, corner radius) and the half-finished product (radius of the sphere) to determine the theoretical height of the irregularities left after milling. To check the results an experimental model is proposed with results analyzed on four samples.