Surface Micro-texture Characteristics of 7075 Aluminum Alloys by Elliptical Vibration Assisted Turning.

To study the fabrication processes of micro-texture for the elliptical vibration assisted turning technique and the characteristics of machined micro-surfaces, the change rules of surface microtexture was analyzed with vibration principle of ellipse and the micro-texture formation under different speeds and feed rates. The vibration track, surface topography, single micro-texture geometry size and surface roughness were analyzed under the elliptic vibration track measurement tests and eliptic vibration turning tests. The analyses results show that in the turning test processes, compared to the common turning, due to the space elliptic movement of the tool, the surface of ultrasonic elliptical vibration turning presents micro-texture grooves similar to ellipse. With the changes of rotation speed and feed rate, it indicates that the geometric size, profile height and surface roughness of micro-texture grooves will change regularly based on the theoretical analyses and experimental results. [ABSTRACT FROM AUTHOR]