Dimensional and Surface Roughness Controls in a Turning Operation

Abstract

Dimensional and surface roughness controls in turning have been achieved by a newly developed measuring system based on an optical technique. The aim of these controls are not only to keep a size deflection within a given tolerance but also to make a smoother surface by removing local irregularities during machining. The control strategy is focused on a Rmax value because of the simplicity of the control system design. The dimensional control is implemented with a reference diameter level of 1/2 Rmax roughness by the regular cutting tool, while in the roughness control a compensatory flat bite tool is used to remove surface irregularities. To begin with the dimensional control is achieved, then the roughness control is followed immediately after the dimensional correction. The control results demonstrate an improvement of surface roughness together with dimensional assurance.