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Production of an Injection Mold.
Jílek, Bohumil ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
This thesis is focused on a production of injection molds. It contains some analyses of the various parts of the injection molds, a description of their functions and the possibility of structural design. A summary of existing technologies for the production of these molds, their advantages and disadvantages is included. This thesis deals with design of the component parts for injection of plastics, strategy of machining and a simulation of machining.
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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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Wire electrical discharge machining at production of precise shears tools
Kuchařík, Milan ; Prokop, Jaroslav (referee) ; Osička, Karel (advisor)
Work is focused on theoretic analisis of manufacturing precise shears tools by unconventional technology closely focused on wire electro discharge machining consideration operation costs of this metod.It is discribing development of this method, machines and tools for electrical discharge machining. It is mention facts influencing quality of cut surface during manufacturing of cutting tools, strategy of cutting workpiece, stage and quality of surface layer after WEDM as long with economic viewpoint and benefits of WEDM technology.
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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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Rationalisation of electrospark machining
Janhuba, Tomáš ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The diploma thesis deals with rationalization of EDM in the Schaeffler plant. The introductory part discuss about this type of machining, while its main purpose is the explanation of material removel process and conditions that the process must meet. It’s a summary of information that needs to be known before implementation of rationalization. The following part of the work describes an initial state of electroerosive workshop. It explains operation of the workshop or what machines are used there. In this part are also written the problems that the workshop have. After that there is part which is focused on the suggestion of solution and testing of that suggestions. The conclusions of that and whether the processess were racionalized are summarized in the technical-economic evaluation chapter and in conclusion chapter.
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Use of unconventional technologies in the production of a selected component
Havlínová, Denisa ; Kalivoda, Milan (referee) ; Dvořáková, Jana (advisor)
The biggest challenge during manufacturing copper part with microslit for optical spectrometer by the means of unconventional technologies was to meet specified narrow range of tolerances and reach right angles at the microslit corners. Electrical discharge machining and laser beam machining were two practically performed methos and both successfully met these tolerances. After consultation is focused ion beam also considered as suitable method for this task, while for photochemical machining is impossible to meet those narrow tolerances. Right angles were not achieved by any of tested methods. At laser cutting edges were proven defects (burrs, molten material), while we saw no negative defects on electrical discharge workpiece surface. Even after optimalization of EDM was machining time longer and there is assumed higher other production cost (tool manufacturing for every single workpiece), but still EDM seems to be more advantageous from financial and surface quality aspect. Based on theoretical research and practical manufacturing is recommend to manufacture specified component with microslit by EDM.
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Optimization of EDM process control parameters
Prokeš, Tomáš ; Beneš, Libor (referee) ; Bednář, Josef (referee) ; Matoušek, Radomil (advisor)
The dissertation thesis is focused on the optimization of control parameters of an EDM machine; the subject of optimization is cutting speed and surface topography. The first part of the thesis contains a research study on the technology of electrical discharge machining with the attention paid to the optimization methods use for control parameters of this process. The second part of the thesis is focused on real application of knowledge gained from studied sources. Here, a design of experiment aim at optimizing the parameters of the EDM machine is designed and carried on to maximize the cutting speed with the highest possible surface quallity. The result of the work is to build adequate regression models and find the optimal setting of machine control parameters.
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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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