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Cemented carbides for machining of stainless steels
Kakáč, Martin ; Sedlák, Josef (referee) ; Humár, Anton (advisor)
The bachelor thesis deals with stainless steels and their machining, cemented carbides, both coated and uncoated. The first chapter is devoted to a detailed distribution of stainless steel, its properties and their use in practice. Next cemented carbide are characterized as a whole. From the species, production marking via physical and mechanical properties to the coating. The last chapter is focused on cemented carbides for machining stainless steels. Tools from companies WNT, Pramet Tools and Sandvik Coromant are selected. The com-parison of recommended cutting conditions in the area of application of stainless steels. It is made practical test with indexable cutting insert HCN 2125 by WNT.
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Modern cutting cemented carbide tools
Štefek, Jaromír ; Kalivoda, Milan (referee) ; Píška, Miroslav (advisor)
This thesis deals with modern cutting cemented carbide tools. In the first section are stated several basic innovations already used tools for basic machining operations, which is turning, milling and drilling. It continues with analysis of single materials for production of cemented carbides, non coated as well as coated and with comparing of their properties. There are listed the basic cutting properties of the cutting tools after that. The penultimate point of the work is optimization of the basic machining operations, namely roughing and finishing, for a given application, which is in this case turning on the lamp stand. Finally, everything is summed up and evaluated in the conclusion.
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Tools Made from Cemented Carbide
Opršál, Ladislav ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
The thesis focuses on cutting tools made of both coated and uncoated cemented carbides. The first part of the thesis deals with the division of materials used for the production of the tools. The second part of the thesis introduces uncoated cemented carbides, special attention being paid to the labelling, production and properties of such compounds. The third part of the thesis presents coating deposition techniques and examines the properties of coating layers. Coating layers are produced using two different methods – CVD and PVD. The last part of the thesis compares the properties of the cutting tools (e.g. their cutting values) produced by the companies Pramet Tools, Sandvik – Coromant and Seco Tools.
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Production and grinding/sharpening of cemented carbide tools
Prokeš, David ; Prokop, Jaroslav (referee) ; Kalivoda, Milan (advisor)
The bachelor thesis concerns the description of rotary tools made of cemented carbides. Ce-mented carbides appear as wide range tool material with reference to ductility, hardness of material and relatively low cost. New knowledge of cemented carbide manufacturing has still improved mechanical characteristics of this material. Tools made of cemented carbides are made on modern 5 axis CNC tool-making grinder machines which can be easily set with grinding parameters and interaction with measuring tools for quick parameters changeover. All of these qualities are suitable for serial and also piece tools production.
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The influence of PVD coating on tool life of cutting inserts during face milling
Jašek, Petr ; Fiala, Zdeněk (referee) ; Jaroš, Aleš (advisor)
This diploma thesis is aimed on durability of PVD and CVD coatings for symmetrical face milling. The theoretical part describes the characteristics of cemented carbides, milling technology and the characteristics of the coating methods. The experimental part describes the machine tool, used tools, workpiece material and cutting conditions. The aim of the work was to measure the cutting forces and tool wear during the milling. Based on experiment, it is clear that the PVD coatings with nano-layers achieves to the longer life in comparison with others and generally, that the using of coatings leads to reduction of cutting powers and lifetime was increased.
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Milling Tools Made from Cemented Carbide
Havran, Petr ; Jaroš, Aleš (referee) ; Kalivoda, Milan (advisor)
This bachelor thesis is focused on the development of cutting tools made of cemented carbides. The first part describes the theory of milling, which is necessary to determine the milling parameters. The next section contains an independent division of milling cemented carbide tools, their uses, advantages and disadvantages. The last part is the selection of tools from the catalogs of the world's businesses and overall assessment.
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Coating methods for cutting tools
Doležal, Jan ; Madaj, Martin (referee) ; Humár, Anton (advisor)
Bachelor work describes methods of coating of cutting tools and their technical characteristics. The work is given below the current product range of manufacturers of coated cemented carbides. At the end of this work is treated the development of coating cutting tools and types of applied coatings.
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Service life increasing of spare part tools for ground cultivation
Černín, Jiří ; Mrňa, Libor (referee) ; Sigmund, Marian (advisor)
This diploma thesis deals with increasing the service life of parts intended for soil cultivation. The work evaluates the current possibilities of increasing the utility value of spare parts. Practical tests will provide recommendations for the most appropriate method to increase durability. The work examines uncharted methods of testing soldered joint. The results are evaluated in terms of quality and economic profitability. All results from this work are based on the basis of practical tests of plowing machine in rocky soil.
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