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Technology of Production Frame of Case
Tvarůžek, Martin ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The bachelor Thesis compares and evaluates the most advanced production technology of components frame of case. These cases are used for induction heating of material. The thesis compares technological features of the material division by means of plasma jet, water jet and laser. It also evaluates the using of the given technology from economic point of view.
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Surface hardening of steels by high power diode laser
Bazalová, Lucie ; Daněk, Ladislav (referee) ; Mrňa, Libor (advisor)
The master thesis deals with the technology of surface hardening of steels by high power diode laser. The thesis is an experiment of surface hardening of steel 12 050 on various parameters of speed movement of the laser head and used power. At first, the work deals with the possible technology of surface hardening, industrial lasers and possible methods for measuring hardness. It describes the material used and the evaluation of the macrostructure and microstructure of the samples and evaluates the achievement of hardness, depending on the distance from the surface. The results are used to assess the suitability of the parameters during quenching.
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Design of the car headlight
Struhár, Slavomír ; Bukvald, Jiří (referee) ; Buganská, Tamara (advisor)
The topic of this bachelor's thesis is design of headlamp for a further unspecified automobile. The first part of the thesis is formed by Overview of current knowledge dedicated to the history, the present and the near future of headlamps of series-production cars. The following sections describe the objectives of the thesis, the process of the design itself and present the final design of the headlamp. The final part evaluates the results of the work with respect to the stated objectives.
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Design of an engraving LED laser
Kasík, Martin ; Sliwková, Petra (referee) ; Dvořáková, Jana (advisor)
This thesis is focused on the search of unconventional machining methods, especially on the technology of laser beam machining. It deals with the area of laser cutting and engraving and examines the influence of individual technological parameters on the given process. Furthermore, there is proposal of design of hobby LED engraving machine, its supporting structure, HW and other electronic components. The prototype of the device is physically assembled and its functionality is verified in the form of several engraving tests of raster and vector formats of graphic materials, and some several shape cuts are made also. The technical evaluation of the assembled equipment, evaluation of tests performed and cost calculation is part of the work too.
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Optical connection
Horák, Jaroslav ; Mišurec, Jiří (referee) ; Káňa, Ladislav (advisor)
Master's thesis treat of optical connection. The aim of this work was also the practical implementation and successful testing. Communications signal is low frequency in the range of 20 to 15 kHz and intended length of the coupling is approximately 200 m. The first is the work carried out theoretical analysis issues. Then is described the design and implementation of its own facility. In conclusion, the measurement is done and evaluate the parameters. I have dealt the optical connection with using a laser beam that is modulated frequency modulation. This optical signal is converted in the receiver using a PIN photodiode (type PIN) back to the electrical signal. Then there is the demodulation and amplification. The frequency modulator and demodulator is phase lock loop. It realizes the type of circuit CMOS 4046. The work is designed properly functioning equipment. It serves for the transmission of speech and audio signal line. It has good properties that match the criteria. The connection can be used outdoors due to the use of cover. The scope of communication may be even greater than 200 meters
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Weldig of the different type of steel by the Yb-YAG laser.
Kopecký, Lukáš ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
Diploma theses is focused on welding experiment of maraging steel by use Yb-YAG laser. Experimet is based on testing of combination steel 11321 and maraging steel. Domex420MC, Domex720MC a QSE380. In theoretical part there are described laser technology of welding, weld defect, maraging steel and inspection of welded joints. In experimental part there are porposed test and made mechanical test of weld as transverse tensile test, bend tests, Erichsen cupping test, Vickers hardness test and makroscopic and microscopic examination of welds. In conclusion there are analysis of the experiment results.
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Weldig of the different type of steel by the Yb-YAG laser
Chlád, Luboš ; Hála, Michal (referee) ; Mrňa, Libor (advisor)
The master's thesis presents an experiment of welding of high strength steel Docol 1200 M and of steel DC01 by the fiber Yb-YAG laser. The experiment is based on testing welds which were made during the experiments. The lasers, laser technologies of welding, steels of higher strength, tailored blanks technology and testing of welds are described in the theoretical part. The practical part contains description and evaluation of tests of welds – transverse tension test, Vickers hardness test, Erichsen cupping test and macrostructure and microstructure test. The final evaluation results of the experiment are presented in the conclusion of the master's thesis.
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Studying the effect of the gap on the properties of laser butt welds
Holub, Matyáš ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
This thesis studies the impact of gaps on the properties of laser butt weld performed. For experiment was chosen DC01 ordinary steel and stainless steel X5CrNi18-10 (1.4301) with different thicknesses. The welding parameters depending on the gap between the welded plates remain constant. In the experimental part of the samples were welded using the Yb:YAG laser and compared to the tensile test, macrostructure, microstructure and Vickers hardness. At the end of the thesis are drawn experimental results.
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