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Production forming drills and theier use in practice
Narovec, David ; Osička, Karel (referee) ; Dvořák, Milan (advisor)
The bachelor thesis deals with forming drills, their production and practical use. The forming technology with focus on the heating of the material for forming is described in the first part of the paper. The second part is focused on general drilling. The drilling technology, drilling process and various drill production techniques are covered. The twist drill is described as well and its basic parameters are mentioned. Twist forming drills are examined in the last part of the paper. Material choosing, technological drill forming process, final drill shape testing for its fading and practical utilization. In conclusion a practical study of cleft drill was performed.
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Wire electrical discharge machining
Gvizd, Michal ; Mouralová, Kateřina (referee) ; Osička, Karel (advisor)
Bachelor thesis elaborated during the bachelor study discusses the electrical discharge cutting of materials with a wire electrode and its usage in industry. The thesis is divided into two fundamental parts –the theoretical and the experimental one. The theoretical part describes the historical development, explains the basic principle and fundamentals of this unconventional way of machining with the definition of methods using this technology. The thesis is focused on the electrical discharge machining, thus gougers are mentioned only peripherally. Afterwards, the wire electrodes used, main machine parts, cutting conditions and advantages of this technology are analyzed in detail. The experimental part deals with the evaluation of cutting surfaces of the sample components with respect to dimension accuracy, surface quality and describes factors which affect these characteristics. The emphasis is put on the machining of the tool steel. Conclusion discusses the analysis of the assembled measurements, their technological/economical analysis and outlines the direction of development in the possibilities of this unconventional technology of material separation.
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Confrontation of processes WJM/AWJ and LBM in condition firm
Novotný, Petr ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
This thesis describes confrontation of processes WJM/AWJ and LBM in condition firm. This is describes basic principle both methods, the most commonly used source of laser beam and pressure water. Use in practice, advantagesdále and disadvantages of technologies. Furthermore there is a proposal for a new machinery in the current. Water jet is recommended, because of the wide use cut materials.
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Technical and economic evaluation of the use of oxygen or nitrogen as the cutting medium during laser cutting of sheet metal.
Králík, Petr ; Osička, Karel (referee) ; Mouralová, Kateřina (advisor)
This thesis deals with a production issue for an engineering company - the optimal method for laser cutting. The options considered are the fusing method of cutting or the oxidising method, utilising the Lissmac SBM-M 1500 B2 equipment - designated for cleaning the oxidising a layer from the incision area. Initially, the cost of machine maintenance was calculated within a continuous production environment. Data was collected from a single month’s production and the potential savings for the processional gas were calculated through the pressure and flow values. In addition, electricity savings and the increased production capacity were calculated due to the higher cutting speed achieved by oxidizing cutting. From the gained data, a graph was created of the investment recovery time for 100%, 50% and 0% of the new created capacity use. Finally, measures for the highest profit from the investment were recommended.
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Wire Electrical Discharge Machining
Barabáš, Martin ; Osička, Karel (referee) ; Sámelová, Vendula (advisor)
The work deals with the technology of electrical discharge wire cutting. The first chapter describes the principle of EDM machining with the basic description of the methods using this machining technology. The main part is concentrated on describing electric discharge wire cutting principle, used wire electrodes, the main parts of the machine, cutting conditions and benefits of this technology. The last chapter describes current trends in wire cutting, news from producers of wire cutters and possibilities of this technology.
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The technology of hot-dip galvanizing
Pometlo, Stanislav ; Osička, Karel (referee) ; Mouralová, Kateřina (advisor)
This thesis deals with the technology of hot-dip galvanizing. At the beginning of this work views into the history of hot-dip galvanizing and analysis of known technologies about applying of melted zinc into the surface of material. It further describes modification for surface before application of zinc´s coating. In the next part of the work are summarized the most common corrosions of hot-dip galvanized material. The work follows up the difficultness of operation for hot-dip galvanizing device. At the end of work describes cooperation with Alka Holding s. r. o.
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Technology solution with cutting operation of "cover" component
Chlád, Luboš ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
In mentioned solution technology of cover part is processed component analysis, proposal of semi-finished product and production technology. In this thesis are selected concrete cutting machines, tools and technological process is elaborated. At the end the techno-economic evaluation is done. This evaluation deals with calculation of times for separate cutting operations, number of machines, tools and workers.
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