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Analysis of the force load when machining of aluminum alloys with monolithic mills from Cemented Carbide
Koubek, David ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
The aim of this thesis is to create the proposal and expansion of knowledge in the field of experimental measurement of force load when milling thin-walled parts made of aluminum alloy monolithic cylindrical shank cutter of cemented carbide (hereinafter referred to as CC). It also discusses the theoretical analysis of the forces generated during milling, and practical approaches to their measurement experiments. This work also deals with the analysis of aluminum and its alloys. The next chapter describes the appropriate strategy for the machining of thin-walled components including defining the problems, that can complicate machining thin walls. The practical part deals with prediction and a following suggestion of the experiment measuring the power load. The last section is devoted to the practical implementation of the measurement of forces during the milling of thin-walled parts with subsequent evaluation and comparison of strength for the record selected from CC carbide tools, including evaluation of roughness parameters.
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Progressive Milling Tools
Koubek, David ; Dvořák, Jaromír (referee) ; Kalivoda, Milan (advisor)
The aim of this work is to create a research on the topic of progressive milling tools, taking into account the actual state of development and milling tools . It also deals with issues directly and milling tools , including basic theoretical and conditions characteristic for this method of machining. It deals with the brief division of instruments from several technological aspects such as design , tooling materials, methods of camping and many others. One chapter is devoted to the method itself and clamping milling tools with a mechanical , hydraulic or thermal clamping system . The last section focuses on the current list of milling tools for surface and corner cutting . These tools were selected from the production of three major domestic and international companies engaged in the production of tools for milling. These companies Pramet Tools sro , CZ Seco Tools and Walter AG.
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Neural Networks for Machine Learning in Algorithmic Trading
Koubek, David ; Krištoufek, Ladislav (advisor) ; Debatz, Laure (referee)
This thesis investigates the forecasting ability of the artificial neural network (ANN) models on five major currency pairs and compares the accuracy of several ANN ar- chitectures to the difficult to outperform random walk (RW) benchmark. The ANNs mostly stand ground against the RW, yet fail to attain significantly different results for most of the currencies in out-of-sample testing. A good predictive accuracy of a few ANN models was shown only for the Japanese yen in our results. Less complex neural network architectures supported the notion of having better generalisation capabilities for most of our datasets. JEL Classification C01, C32, C45, C51, C52, C53, C87 Keywords artificial neural networks, machine learning, finan- cial markets, Forex, day trading, algorithmic trad- ing, pattern recognition, computational learning the- ory, backtesting, forecasting Author's e-mail 56374598@fsv.cuni.cz, mrkoubek@gmail.com Supervisor's e-mail ladislav.kristoufek@fsv.cuni.cz Abstrakt Tato práce zkoumá schopnost modelů na bázi neuronových sítí (ANN) předpovídat budoucí cenu pěti hlavních měnových párů a porovnává přesnost předpovědí s těžce překonatelným modelem random walk (RW), který vždy hádá následující cenu jako totožnou se současnou cenou. ANN modely převážně obstály oproti RW, ale pro většinu měn...
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Analysis of the force load when machining of aluminum alloys with monolithic mills from Cemented Carbide
Koubek, David ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
The aim of this thesis is to create the proposal and expansion of knowledge in the field of experimental measurement of force load when milling thin-walled parts made of aluminum alloy monolithic cylindrical shank cutter of cemented carbide (hereinafter referred to as CC). It also discusses the theoretical analysis of the forces generated during milling, and practical approaches to their measurement experiments. This work also deals with the analysis of aluminum and its alloys. The next chapter describes the appropriate strategy for the machining of thin-walled components including defining the problems, that can complicate machining thin walls. The practical part deals with prediction and a following suggestion of the experiment measuring the power load. The last section is devoted to the practical implementation of the measurement of forces during the milling of thin-walled parts with subsequent evaluation and comparison of strength for the record selected from CC carbide tools, including evaluation of roughness parameters.
|
|
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Progressive Milling Tools
Koubek, David ; Dvořák, Jaromír (referee) ; Kalivoda, Milan (advisor)
The aim of this work is to create a research on the topic of progressive milling tools, taking into account the actual state of development and milling tools . It also deals with issues directly and milling tools , including basic theoretical and conditions characteristic for this method of machining. It deals with the brief division of instruments from several technological aspects such as design , tooling materials, methods of camping and many others. One chapter is devoted to the method itself and clamping milling tools with a mechanical , hydraulic or thermal clamping system . The last section focuses on the current list of milling tools for surface and corner cutting . These tools were selected from the production of three major domestic and international companies engaged in the production of tools for milling. These companies Pramet Tools sro , CZ Seco Tools and Walter AG.
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