Simulative and experimental investigation of the surface integrity obtained by Non-Circular-Rotary-Turning (NCRT)

Components with non-circular contours are increasingly used in technical applications, for example in shaft-hub connections or for medical implants with bionic-induced contours. A novel process approach for the production of these contours is the Non-Circular-Rotary-Turning (NCRT). The technology is based on the principle of kinematic coupling of workpiece and tool rotation, which allows to transfer the non-circular shape of the tool to the component within certain limits. All linear axes except the feed axis are not in motion during this process. In contrast to conventional turning, the non-circular contour and the complex kinematics of NCRT lead to surfaces that are strongly depending on the measuring position on the component. ... mehrIn this work, the surfaces obtainable by NCRT are generally investigated. Using an example cross section, a kinematic dexel-based simulation is utilized to predict the kinematic surface topography depending on the process parameters. The surfaces are also investigated in experiments and compared with the simulation. The results show a characteristic surface topography, as well as a strong dependence on the ratio of tool to workpiece diameter. Better surfaces are generally achieved in downturning.

Components with non-circular contours are increasingly used in technical applications, for example in shaft-hub connections or for medical implants with bionic-induced contours. A novel process approach for the production of these contours is the Non-Circular-Rotary-Turning (NCRT). The technology is based on the principle of kinematic coupling of workpiece and tool rotation, which allows to transfer the non-circular shape of the tool to the component within certain limits. All linear axes except the feed axis are not in motion during this process. In contrast to conventional turning, the non-circular contour and the complex kinematics of NCRT lead to surfaces that are strongly depending on the measuring position on the component. ... mehrIn this work, the surfaces obtainable by NCRT are generally investigated. Using an example cross section, a kinematic dexelbased simulation is utilized to predict the kinematic surface topography depending on the process parameters. The surfaces are also investigated in experiments and compared with the simulation. The results show a characteristic surface topography, as well as a strong dependence on the ratio of tool to workpiece diameter. Better surfaces are generally achieved in downturning.