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On the increase of cutting performance of thread cutting taps with coatings
Světlíková, Jitka ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
This bachelor thesis deals with the process of cutting, the wear of cutting tools and the fact, that coating makes tools more durable and increases cutting power. The goal of the experimental part is to determine, compare and evaluate cutting features in the process of thread cutting with taps of different coatings. For the experiment invariable cutting conditions were chosen, the only variable is the type of used coating. The result of the experiment is the measurement of cutting torque dependent on time and the grade of the wear of cutting tools.
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On the modern surface treatment of pressure casting dies
Černý, Štěpán ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
Bachelor thesis is focused on the influence of surface treatments due to prolonging life and decreasing an amount of service hours on the die casting molds of aluminium alloys. Theoretical analysis of the problem deals with the requirements for tools materials used for making these moulds. Furthermore it deals with the materials which are most commonly used in their production and the species of aluminium alloys which are most commonly casted. The second part of this thesis, which is discussed in detail, deals with design solution regarding to usage of surface finishes on the moulds for die casting and their specific properties. Another part of this thesis contains experimental tests where was measured selected coating in order to determine its behaviour during the casting cycles with a focus on increasing lifetime of the mould insert, also reducing the amount of glued metal on the walls and finally improving the surface of casted part. It was found, according the analysis results, that the TiAlN coating helped to reduce the amount of glued metal on the mould walls. This also helped to reduce the amount of service intervals. On the other side for achieving much better results is better to use TiB2 coating. It has been experimentally confirmed that the TiAlN coating is not suitable for using in die casting moulds of aluminium alloys.
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Comparison of options in production of injection molds
Marko, Tibor ; Sliwková, Petra (referee) ; Kandus, Bohumil (advisor)
The project elaborated in frame of engineering studies branch engineering technology (2303R002) by comparing different methods of injection molding tool manufacturing. Set manufacturing method for each one of three selected plastic parts, particularly focused on cavity and core manufacturing. Various technological methods of manufacturing, material removal and forming plastic parts will be used for each cavity and core. Production research and economical evaluation will be developed based on given production processes and technology, which will determined which technology to use to pay off in economic terms, depending on the complexity of the plastic part.
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Machining of hard-to-machine materials
Tejkl, Jakub ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
This bachelor thesis studies the machining of hard-to-machine materials. The first part of the thesis considers hard-to-machine materials and analyses them. The next part of the study focuses on individual alloy machinability issues. The final section of the thesis is devoted to experiment, statistical analysis and subsequently to its evaluation.
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On the optimization of suction valve joint strength testing
Attasek, Radek ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
The thesis is focused on the testing and its optimization of the joint suction valve strength. The main intention is an analysis the current state of the pressing process in the department for installations of suction valves at Bosch Diesel, Ltd. Jihlava. Part of the work is focused on the new design of the teswting equipment with an intention to reduce the need of service and reduction of the production tact, with a final discussion and assessment.
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On the modern technologies of hole production in metal materials
Laňka, Lubomír ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
This bachelor thesis is focused on the modern technologies for the hole production in metal materials. In the first part the fundamental technologies are described including how to make the hole or to modify it. The second part deals with the modern cutting tools, and the other part includes some machines for hole production. Some non-conventional methods of hole machining are also mentioned. The last two parts deals with the experiments - the tool wear and other phenomena are evaluated when machining some selected materials. The work confirms that the titanium alloy is a material very difficult to drill up today.
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High-Speed Steel Taps and their Uses
Něnička, Filip ; Dvořák, Jaromír (referee) ; Sliwková, Petra (advisor)
Characteristics of high speed steels. Description of production, chemist and heat threatment of high speed steels. Characteristics of thread produce methods and tools. Description of thread turning, milling, grinding, cutting and forming. High speed taps in product range of chosen tool manufacturers.
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