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Analysis of durability and costs of monolithic milling and drilling tools
Kašpar, David ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
This bachelor thesis deals with the durability of different types of monolithic drilling and milling tools made of high-speed steel and sintered carbide. The theoretical part deals with durability, possible types of wear of monolithic drilling and milling tools and related circumstances. The practical part examines the durability of different types of tools for drilling and milling, their comparison in terms of cost and productivity of machining and their impact on production costs in the production of a simple part.
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Inconel 718 machining for aerospace applications
Urbánek, Vojtěch ; Osička, Karel (referee) ; Polzer, Aleš (advisor)
Bachelor thesis is aimed at exploring the properties, usage and issues with milling of the Inconel 718 for aerospace applications. In the theoretical part a study of superalloys and their properties for successfull application in aircraft engines was conducted. Further the machinability classes, cutting materials and process of milling focusing on milling of the Inconel 718 are described. The experimental part deals with measuring and evaluation of cutting forces when milling the Inconel 718 with cemented carbide and ceramic cutting tools.
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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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Structure and Properties of Sintered Tungsten Carbides
Novotná, Hana ; Klakurková, Lenka (referee) ; Čelko, Ladislav (advisor)
This bachelor thesis deals with the structure and properties of sintered tungsten carbides. The literature review section concerns the development of sintered carbides, their composi-tion and structure, different types of carbides, the steps of the production of sintered car-bides, sintering technology and alternative materials for cutting tools. The experimental section deals with composition of WC-Co and is ascertained by the dependency coercivity on WC grain size and also on cobalt content. This work describes the measurement of WC grain size and measurement of the coercivity, one of the fundamental properties of sintered carbides.
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Concept of reaming technology
Štěpánek, Martin ; Sedlák, Josef (referee) ; Kouřil, Karel (advisor)
The diploma thesis deals with the design of the hole-making technology for hydraulic components that are specific for its high requirements on size and shape accuracy. The aim of diploma thesis is to compare the productivity, efficiency and accuracy of reaming with two different reamers – the solid carbide reamer and the newly designed reamer that combines two cermets on cutting part of the tool. In the practical part, the data analyses and calculations were made. It was discovered that the newly designed tool brings economic benefits while the qualities of final hole are improving or remaining at the same level.
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Tools for threading and their use
Veselý, Václav ; Polzer, Aleš (referee) ; Sliwková, Petra (advisor)
The bachelor’s thesis Tools for threading and their use deals with issues connected to tools, the materials used and their usage in the field of mechanical engineering. Individual parts of the thesis cover types of tools for threading, methods of threading and materials suitable for tap making. Further, the range of monolithic milling taps in the producers’ supply is also analysed.
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The comparison of cutting tools for milling of dental impression made from materials Ti6Al4V ELI and CoCr
Bíba, David ; Zemčík, Oskar (referee) ; Dvořák, Jaromír (advisor)
The aim of this dissertation is the comparison of two chosen milling tools. Both milling tools are made of solide carbides and therefore the theoretical part deals with these materials. We compare the chemical composition as well as the milling tools materials. Next chapter deals with the geometry of the milling tools with semi-circular front blades cutting edges and comparison. In the last part of the dissertation we test the durability. The data gained by a micrometric method are interpreted in the graph. By means of this research we found out the impact on the suitably chosen geometry on splinters and wear resistance. It is possible to optimize the produced milling tools or to choose more suitable tool instrument on the basis of gained durability data.
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Monolithic milling tools with PVD coatings and their use
Ševčík, Jan ; Sliwková, Petra (referee) ; Jaroš, Aleš (advisor)
The bachelor thesis deals with the monolithic milling tools carbide on the surface which is deposited by a thin layer of rating on. First of all, the thesis describes the method of milling, the basic division of milling operations and milling tools, power analysis tool load. Then, it is analyzed problems of cemented carbides, its production, properties and dividing into groups. After that it is described characteristic of coating methods, especially the PVD method, and its modifications. The last part is devoted to producer’s offers of coated monolithic mills. There are introduced few selected tools and described its characteristics, geometry and application suitability.
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