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Analysis of defects of copper alloy after wire electrical discharge machining
Vontor, Jakub ; Osička, Karel (referee) ; Mouralová, Kateřina (advisor)
Electrical discharge wire machining, which represents non-conventional machining technology is up on very high technological level. However, due to this type of machining many of defects are set on the material and the quality of machined surface is changed according to set parameters of machine. Complex study was created with the aim of optimization these parameters according to final quality of surface and right wire speed. This study include experiment with 33 samples, every of these samples was machined with different parameters, results of these machining were analyzed.
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Component measurement with a FARO device
Grepl, Martin ; Mouralová, Kateřina (referee) ; Kalivoda, Milan (advisor)
This theses deals with the measuring of comparts from the lastest technology FARO. It introduces technology FARO and the most significant products among the measuring arms. Subsequently, all the features of the measured particles, that are necessary to know for the whole process, are mentioned. The whole process of measurement is described step by step in the practical part. The aim of the measurement is to verify the dimensions which are prescribed by the author and geometrical tolerance of the particles via measuring arm. The thesis also consists of a final protocol of the measuring process, created by the program PolyWorks. Finally, the particle is considered to be incompatible, due to the unfullfilness of the maximum prescribed deviations.
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Ultrasonic machining technology
Krajči, Jakub ; Mouralová, Kateřina (referee) ; Osička, Karel (advisor)
The main aim is of the thesis is to provide information about ultrasonic machining, to introduce ultrasound and its physical properties, to describe ultrasonic machining methods and to show the non-destructive use of ultrasound. Furthermore I will hold a discussion about this topic and make a quick summary.
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Construction of the parts for a sports ground
Holub, Dominik ; Mouralová, Kateřina (referee) ; Kalivoda, Milan (advisor)
This bachelor's thesis deals with the construction desing of workout park specialized for exercises with own body weight. It consists of a several solutions of workout park. One of this solution is developed according to functionality and materials. Finally, some results of these solutions are comparated and evaluated to choose the best one by expenses.
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Increasing production effectiveness of wooden mounting part
Strnad, Jan ; Mouralová, Kateřina (referee) ; Zemčík, Oskar (advisor)
This bachelor thesis describes the current production of semi-finished wood in a company TON a.s. These semi products are subsequently designed for assembly, painting, packaging and distribution. Bachelor thesis closer specializes in the production of slotting the mounting rail to the wooden part of the machine Zuckerman, then assembling and gluing to the assembly, which consists of two pieces of wood. These reports serve as sub-assemblies for assembly chair. Identification of deficiencies in the production of cutting grooves in wood parts and their assembly is the main task of work. Based on the knowledge base was developed techno-economic evaluation.
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Analysis of results from experimental electrodischarge sinking of special materials for aerospace industry
Macháčová, Veronika ; Mouralová, Kateřina (referee) ; Kalivoda, Milan (advisor)
The aim of this master's thesis is experimental electric discharge sinking of special materials for the aerospace industry. The first part is a general overview regarding the technology of electric discharge machining with emphasis on electric discharge sinking. Following this is a practical part devoted to the electric discharge sinking of the Nimonic 263 material with a copper tool electrode with a subsequent evaluation of surface and subsurface changes in this material. The wear of the tool electrode is also examined with the conclusion highlighting combination of machined material and tool electrode material behave in different working conditions and how the surface layer of machined material is affected.
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Technology of wire electrodischarge
Tichý, Štěpán ; Mouralová, Kateřina (referee) ; Osička, Karel (advisor)
This master’s thesis deals with technology of wire electrical discharge machining in theoretical and practical level. Theoretical part of the thesis explains in detail the principle of electrical discharge machining, describes functional parts and settings of a current wire EDM machines and also the possibility of using method for production of specific parts. Practical part of the thesis solves manufacturing of gearing on pinion manufactured by wire cutter EXCETEK V650 and statistically evaluates precision parameters on surfaces of the carriers taken by specific technological conditions with the same machine.
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Design and ergonomics of hand tools
Sovják, Richard ; Prokeš, Tomáš (referee) ; Mouralová, Kateřina (advisor)
The diploma thesis is focused on the analysis of the power tools ergonomics and also on the economic impact on a sick employee in the Czech Republic. It presents the results of the characteristics of hand tools in terms of their design, usage positions and handling. It introduces current legislation and ergonomic methods, including the newly designed visual tool AAL. The tool enables ergonomic analysis of positional rotation of the limbs, torso and neck, including the input of strength and muscle parameters. AAL is integrated into Excel software with the possibility of integrating data from Rhinoceros software and the Grasshopper module, which automatically generates data. The analysis is based on 3D scans of 144 power tools that are divided into 11 groups. It analyzes 13 typical diseases and their economic impacts. From an economic point of view, the costs per sick employee are almost 57% higher compared to a healthy employee. The author's design of the ergonomic part of the tool is also part of the thesis.
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Electroerosive sinking of technical ceramics
Kudrna, Tomáš ; Mouralová, Kateřina (referee) ; Osička, Karel (advisor)
The master’s thesis deals with the topic of electrical discharge machining. The first part of the thesis contains a study of the die-sinking EDM. The die-sinking EDM of the silicon carbide ceramic is realized in the experimental part of the thesis. The result of this work was to explore the influence of the EDM sinking parameters, specifically pulse current, open-voltage and pulse on-time, on the machined surface. Furthermore, the analysis of the tool electrode was made. This analysis was focused on the wear in the corners, which has key influence on accuracy of the machining. The machining time was also examined.
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Electroerosion wire cutting of technical ceramics
Habovštiaková, Mária ; Mouralová, Kateřina (referee) ; Osička, Karel (advisor)
The presented diploma thesis deals with the issue of wire electrical discharge machining of SiSiC ceramics. The first part explains the principles of electrical discharge machining, describes the WEDM technology and presents the properties of the advanced ceramics. The second part consists of a detailed analysis of the cutting process of eighteen samples obtained with systematically changing process parameters. Based on the obtained results from EDX analysis, SEM electron microscopy and topography there was performed an analysis of the influence of process parameters on the cutting speed, surface roughness, kerf width and number of wire breaks with usage of the selected brass cutting wire. From the evaluated results it was possible to select a combination of parameters that ensured a stable machining process.
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