Analysis of surface roughness of aluminum alloys fine turned: United phenomenological models and multi-performance optimization

摘要

The use of aluminum and aluminum alloys as raw materials has been increasing in the last decades due to their several excellent mechanical properties (such as tensile strength, hardness or corrosion resistance) and technological properties (such as excellent castability or finish turning). Most metal parts are manufactured by machining resulting in one of the most important characteristics of all metal parts which is the surface roughness of the machined surfaces. In this article an investigation into the fine turning of two types of aluminum was carried out with diamond tools of different cutting edge materials and different shape of cutting tool edges. The tests were performed with the design of experiments methodology. In order to estimate the Ra and Rz surface roughness parameters widely used in the industry reduced united phenomenological models were built from the measurement results utilizing edge materials, and work piece materials as qualitative members. After multi-performance optimization an optimum point with desirability functions was defined so as to maximize productivity and minimize surface roughness. (C) 2015 Elsevier Ltd. All rights reserved.