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Laser micromachining
Láznička, Pavel ; Daněk, Ladislav (referee) ; Mrňa, Libor (advisor)
This thesis deals with lasers, their general theory and application. Then a theoretical part describes laser micromachining and engraving. Experimental part of thesis deals with several experiments performed by powered fibre laser which is not primarily intended for the field of micromachining. Experiments were mainly evaluated by several types of microscopes where the amount of removed material was appraised. By particular experiments removed material was in accordance with used working parameters of laser and a significant role plays machining material. It emerges from the experiments that for the field of laser micromachining and engraving shorter pulses are more suitable (minimal pulse duration was 1 ms in experiment) and it is connected even with a way of removing material. Applied powered laser can be used for micromachining in specific fields of production.
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Contactless measurement of surface temperatures when machining
Šťáva, Radek ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
Contactless measuring of surface temperature integration in the other measurement methods and their assimilation at evaluation of surface temperature of a semi-finished product bored by various tools is the target of the work. An impassable opening is being bored by these tools. The opening is close to a scanned wall. The semi-finished wall temperatures are being scanned by thermocamera and subsequently compared for every single used tool in this experiment.
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New methods for inner rotary surfaces finishing
Kazdera, Tomáš ; Zemčík, Oskar (referee) ; Zemčík, Oskar (advisor)
Content of the text deals with the methods of finalizing the internal surfaces of revolution. The paper discussed the theory most widely used machining methods that are commonly used in engineering practice. For each methods, are given the tools achieved surface roughness and geometric tolerances. The instruments are assigned to the machine on which the finishing operations are undertaken.
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Design of headstock for boring centre
Kovács, Zdeněk ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
The aim of this bachelor thesis was to do the design of headstock used in horizontal boring centre. At the beginning was carried out the search of important headstock parts which are found in horizontal boring centres. After that was dealt with automatic tool change. The last part this thesis concern with design of headstock and its realization in 3D.
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A new production of the shaped shaft "Hohlwelle".
Kundrát, Vladimír ; Kouřil, Karel (referee) ; Píška, Miroslav (advisor)
Diplomová práca je zameraná na riešenie aktuálneho a akutného problému výroby tvarovej hriadele “Hohlwelle” vo firme Vekastool. Tri návrhy riešenia boli sústredené na dokončovaciu operáciu diery 30 H7, z ktorých dva boli priamo odtestované vo firme. Jedna z nich bola návrh a realizácia nového vyvrtávacieho nástroja firmou Ham-Final , ktorá priniesla zníženie nákladov o dve tretiny.
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A Project for the production of the transmission case for the winch
Hrbáček, Emil ; Strejček, Jan (referee) ; Kalivoda, Milan (advisor)
The project elaborated within engineering studies. The project is submitting design of technology production of precise holes for rolling bearings which are located in transmission case for the winch. Variants of production technologies were designed based on the construction drawings of transmission case. Chosen type of technology is boring. Boring was performed on the CNC machine DMF 180 produced by DMG MORI. DMF 180 allows precise production of bearings holes. Via selected criteria, it was selected the better variant of two. The criteria were: cylindricality, cohesiveness, position of elements and surface quality.
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