This diploma thesis deals with machining of rotating components made of composite material. Components of the two manufacturing technologies are compared. The aim of the thesis was to analyze and calculate the costs of the given technologies for different production batches. At the end of the diploma thesis there is a technological-economic evaluation and decision on which production technology will be used.

In this thesis is described machining of barrel steels and determination of the most suitable cutting conditions for this process. In the theoretical part was characterized cutting process and explained problems of VBD wear, chip formation and roughness of the surface. There were also explained most common cutting materials and in the last part were described CVD and PVD coating methods. In the experimental part was measured force load during turning. There was also tested eight carbide cutting inserts from SECO TOOLS. During the tests were measured additional surface roughness values and taken chip samples as well. From the evaluated load force data were determined optimized cutting conditions for machining barrel steels and most suitable type of cutting insert.

General perspective of this diploma thesis was aimed at machining of hard-to-machine materials. Theoretical part contains division and specification of these types of materials. Ways of classification and evaluation were also listed. Causes of worsened machinability were defined with the design of possible technological solutions, which eliminates these features. The main target of experimental part was turning nickel-based superalloy Inconel® 718 with the purpose of increase process productivity. Knowledge about appropriate types of cutting tool material and his coating were necessary for process optimization. It was achieved by replacing reference cutting tool material (coated carbide inserts) with SiAlON ceramic. Cutting tool edge was tested with an intention to discover appropriate deal between tool life and volume of material removed. Measured cutting forces, generated by machining of reference and optimize technology, were processed by using simulation software. Total deformation of workpiece material was statistically evaluated. The conclusion of diploma thesis is technical-economic evaluation of both options.

This Master thesis aims to increase the effectivity of the machining of pneumatic cylinders specific components. In the first chapter, the concurrent approach to the manufacture of corrosion resistant austenitic piston rod. This approach consists of the technological procedure, the analysis of the cutting tools used in the process and the cutting conditions. The machining process deals with low durability of cutting tools and the necessity of continual supervision by the operator. Therefore, an alternate design of cutting tools and cutting conditions is suggested in the next chapter. The new design has been tested in manufacture process. In the last chapter, the concurrent and the innovative approach are compared. By choosing the proper cutting tools and cutting conditions it was managed to increase the durability of cutting tools and to increase the effectivity of the whole manufacture process.

The thesis is focused on concept of manufacturing technology for rotary part in case of mass production. The main aim was established suitable manufacturing technology for rotary part, choosing lathe machine, cutting tools and creating of NC program. The part of diploma thesis contains configuration of lathe machine in software Sinumerik. Document includes also the basic rules for developing NC program for two channels lathe.

The topic of the Master‘s thesis focuses on NOK pieces which are produced during the production of components. NOK pieces and their rework significantly increase the company‘s costs. In the individual chapters there is an analysis of the company and the definition of a critical point. The FPY indicator was used for the analysis of the company, from which the component was identified. Three improvement concepts have been created for this component. These concepts may reduce the rate of NOK products in the company. The conclusion of the Master‘s thesis presents the evaluation and implementation of the selected change.

This master´s thesis deals with the design of the headstock of a turning center. The aim of the work is the design solution of turning headstock with output of about 5 kW with the possibility of positioning in the C axis. The introductory part of this thesis is focused on the descripti-on of the basic parameters of the headstock and turning centers on the market. The next part deals with choice of cutting conditions and calculation of spindle parameters. These calculations are verified using the FEM method. Based on the calculations and design requirements, a headstock model with drawing documentation is created.

The diploma thesis deals with the design of a built-in headstock of a turning center. The aim of the work is the design of a spindle for machines up to 10 kW. The spindle is driven by a two-speed gearbox and a belt drive. In the introduction, the work deals with the description of individual parts of the turning headstock. A design proposal is performed, accompanied by a number of technical calculations. The result of the work is a 3D model, drawing documentation and calculation report.

The diploma thesis deals with the topic of machinability of materials. The theoretical part describes the aspects according to which machinability can be evaluated. The material side of the thesis is focused on various types of difficult-to-machine materials. The cobalt alloy UmCo50 belongs to the group of difficult-to-machine materials and it is the subject of the experimental part. UmCo50 is an alloy for high temperature use. The primary aim of the thesis was to monitor the wear of the selected cutting tool when turning this alloy. Other aspects of the selected machining process were also monitored, such as force effects or the quality of the machined surface. Despite the fact that machinability of tested materials cannot be expressed in terms of the absolute value of a quantity, it is necessary to compare the various aspects of the machining processes by reference materials. However, certain conditions of this comparison must be met. Based on this, a comparison of tested and reference material was performed.

This diploma thesis is focused on a CNC turning operation of form parts made of stainless steels. The first part of the diploma thesis is focused on a theoretical analysis of stainless steels material characteristics. The second part is focused on a concept of experiment of complex form experimental stainless steel components. In this thesis the new CNC technology is defined in a new operation system Sinumerik 840D/ShopTurn V06.04 with an application for a new multi-purpose turning centre SP280SY. The final part comprehends technical documentation, CNC programs of shaped components, their verification and overall photographic documentation.