Měření vybraných parametrů integrity povrchu po obrábění těžkoobrobitelných materiálů

Abstract

The presented dissertation thesis deals with the machining of hard-machinable materials with a focus on super-alloys and further evaluation of the whole process. More demanding materials require the introduction of new advanced approaches, progressive cutting tools and room for innovation of the entire process. The main goal of this thesis is to test selected recommended cutting tools and then evaluate the entire machining process with respect to the properties of the selected alloy and to contribute to a broader knowledge in the field of machining super-alloys in practice. Another goal of this work is to analyse the current state of knowledge in the field of hard-machinable materials and super-alloys with a focus on titanium and its alloys. It is important to define the machining process and then describe the influence of the behaviour of the machined material on the cutting tools, their wear, chip formation and selected parameters of surface integrity. Titanium and its alloys have become very commercially used and important in many industries over the last decades. Titanium alloys are often used in engineering (automotive, aerospace industries). It is mainly due to a corrosion resistance and strength combined with low specific gravity. Titanium and its alloys are able to last in the marine environment for several decades, where other materials (metals) have a limited life cycle. Despite its prevalence, the price is very high. The process of titanium mining is financially demanding and this increases its price even more. The experimental activity is carried out at VŠB – TU Ostrava Faculty of Mechanical Engineering in cooperation with University of Žilina, Žilina (Slovakia) and it is focused on functional tests of cutting tools, which were specified on the basis of knowledge from the theoretical part of the dissertation thesis. Titanium alloys are referred to as materials that have impaired machinability and therefore require good knowledge of the machining process. The results of the dissertation thesis will be used as a basis for further research in this area, as a basis for creating studies and supplementing current knowledge or refuting already published statements.