Investigation of the surface topography and cutting tool kinematics in Hammering Turning

Hammering Turning is a new process combination of Vibratory Assisted Machining (VAM), which can achieve both microtexturing of the surface and hardening through mechanical surface treatment by suitable coupling of a biaxial oscillation of the cutting tool. These surfaces can be used for optimising tribological applications. Microtextures are formed by plastic deformation of the surface layer which is decoupled from the cutting process. The excitation of the oscillation is done by an open loop piezo system. In this work, a correlation of microtextured topographies and process forces with measured displacement signals using a non-contact capacitive measurement system with submicrometer resolution is presented. Further, the influence of different tool microgeometries on the process forces, kinematics of the process and the resulting topography is investigated. The results show that especially the tool geometry has a large influence on the type of microtexture, while process forces are affected to a minimum.