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High speed steel milling cutters made by powder matallurgy
Svoboda, Martin ; Sámelová, Vendula (referee) ; Jaroš, Aleš (advisor)
Bachelor thesis is a research work describing milling cutters made of high speed steel by powder metallurgy (HSS PM milling cutters). In chapters one, two and three are generally described milling, high speed steels and powder metallurgy. In chapter four are introduced particular HSS PM milling cutters of a few producers. The summary contains mechanical properties of cutters and suitability for machining. It is focused on main type of HSS PM cutters, which are the end mills.
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Milling cutters for CNC machine tools
Janošek, Martin ; Sámelová, Vendula (referee) ; Humár, Anton (advisor)
My bachelor thesis is about milling cutters for CNC machine tools. First the thesis deals with milling theory. There are fission tools or fission machines. Next chapter is about holding tools. The practical part deals with an assortment of production of milling tools for milling flat surfaces made by three milling tools producers. These are Sandvik Coromant, Pramet Tools and Walter companies. In the end of my work these companies are evaluated from different points of view.
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On the Effective Machining of New Ceramic Materials
Sámelová, Vendula ; Sedlák, Josef (referee) ; Vrba, Vladimír (referee) ; Humár, Anton (advisor)
Advanced ceramics have long held the front of the list of promising materials for high-tech applications. The most common problem is the high cost of design, production and machining of advanced ceramics parts. The main sense of advanced ceramics processing techniques development is affordable, high-volume production. The dissertation is focused on SiC silicon carbide grinding. SiC is used in the design of machine parts due to its excellent properties The deep knowledge of the diamond wheel grinding process is important because it is one of the finishing methods and therefore has a direct impact on the quality and strength of the SiC parts. The key issue here is the overall surface quality of the parts after diamond wheel grinding and the knowledge of the factors that influence the surface quality. These include, in particular, grinding vibrations. The main purpose of the thesis is to create a system of specific scientific and technical information, which will allow applying optimal technological procedures in the processing of ceramic components. The theoretical part of the thesis contains an analysis of the current state of the art in the advanced ceramics machining area, detailed analysis of the ceramics grinding with diamond grinding wheels, signal analysis theory and analysis of surface quality assessment methods. The experimental part contains analysis and discussion of the results obtained during the monitoring of the silicon carbide grinding process with a diamond grinding wheel. Various diagnostic methods have confirmed the presence of vibrations at a frequency close to the speed frequency of the grinding wheel, which had a significant, negative effect on the samples surface quality. Vibration diagnostics has identified a specific source of vibration (clamping of the workpiece) and it has been removed subsequently.
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Modern cooling lubricant for metal machining
Nováček, Pavel ; Sámelová, Vendula (referee) ; Zemčík, Oskar (advisor)
This work covers the characteristics of different types of processing fluids used in machining; their types, the possible ways to supply and certain operational activities associated with the use of these liquids. The following are some of the modern trends in machining including dry machining, comparing their abilities with the machining process with fluids.
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Turning tools
Václavek, Jiří ; Sámelová, Vendula (referee) ; Humár, Anton (advisor)
The bachelor's thesis deals with turning tools and compares domestic and foreign companies' products. The turning is generally described with basic formulas in the first part of the thesis. The second part is aimed on tools, categories of tools and materials which they are made of. In conclusion, there is comparsion of several tools from domestic and foreign producers.
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Influence of coatings on durability of cutting inserts during longitudinal turning
Balíček, Martin ; Sámelová, Vendula (referee) ; Jaroš, Aleš (advisor)
This thesis deals with the influence of deposited coatings for durability and tool wear during longitudinal turning of steel CSN 41 1600 (E335) and influence of wear and surface quality. The theoretical part is focused on characteristics of turning technology, application, manufacturing and methods of coating cemented carbide and tool wear. The experimental part of the thesis includes the evaluation of the measured values, a description of the material, used tools and machine tool. The values measured in the experiment imply that the most suitable of the tested tool inserts is WNMG 3-1-NF with applied coating TiAlN + TiN. Surface quality decreases with increasing wear of the tool.
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Design of an Internal Methodology for MSA of Attributive Data in the Company
Jaroš, David ; Maradová, Karla (referee) ; Sámelová, Vendula (advisor)
This diploma thesis deals with the design of an internal methodology for MSA of attributive data in the company following a finding in the IATF 16949:2016 audit. The thesis text aims to map the current trends in approaches to attributional MSA analysis with a focus on visual inspection. Based on the theoretical findings, a new company methodology is to be subsequently proposed. The defined aims of this thesis were fulfilled, resulting in a methodology that meets the company's requirements as well as the methods described in the relevant manuals. The proposed methodology uses the cross-tab method, which describes the analysis of attributional data without knowledge of the reference. The result of the analysis are kappa coefficients, which determine the measure of agreement in the evaluation, and efficiency values of the measurement system. By following the principles described in this thesis, it is possible to generalize the proposed methodology for use in other companies.
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Sinumerik 840D tools for NC programming of machines
Hrabal, Josef ; Sámelová, Vendula (referee) ; Polzer, Aleš (advisor)
This thesis deals with the possibilities of SINUMERIK 840D applications on turning centers. The first part of the thesis is focused on methods of NC programming and especially on the description and operation of the control system through the tutorial SinuTrain 7.5 Ed. 2. The second part of thesis is generated NC programs on the selected components with parametric typing and using a counter. Production technology and the creation of the NC program is created for the CNC machine SP280SY. In conclusion, the thesis is done machining simulation machine with output times.
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Wire Electrical Discharge Machining
Brázda, Radim ; Slaný, Martin (referee) ; Sámelová, Vendula (advisor)
This work deals with the technology of wire electrical discharge machining. The first chapter describes the basic principles and essence of electrical discharge machining. Then the work deals with the wire cutting in terms of wires, machines and cutting conditions and benefits of this technology. In the last chapter the work is focused on trends and news in wire electrical discharge machining and also describes the possibilities of this technology.
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