Theoretical Roughness Modeling of Hard Turned Surfaces Considering Tool Wear

Surface roughness is an important factor in metal cutting, and usually different surface characteristics are used to control the quality of machined surfaces. However, as cutting tool wears out during process, values change. In most cases, theoretical calculated without taking wear into account. For this reason, measured may differ from each other, tendency their change also be different. This paper presents a method for determination hard turned surfaces considering tool. The purpose analyses performed was show effect trace on give possible take account when calculating values. During investigations, shape actual (worn) edge section recorded by optical microscope, were with that profile CAD modeling developed earlier. Cutting experiments conducted lathe machine two similar tools, one them has significant wear, while other completely new one. compared real values, error estimates between 8.7 68.3%, larger errors found at lower feeds.