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Roller-burnishing technology as finishing oparation.
Sekerka, Vít ; Sedlák, Josef (referee) ; Zemčík, Oskar (advisor)
This bachelor thesis deals with chipless finishing operation of roller-burnishing. It explains and describes basic ideas concerning finishing and hardening of machine components by means of roller-burnishing, parting of tools, application in manufacturing and techno-economic usage. Own project, which deals with rollerburnishing of inside conic surface, is part of the thesis too.
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Rotary tables for machine tools
Novotný, Michal ; Holub, Michal (referee) ; Dokoupil, Vladimír (advisor)
The aim of this bachelor thesis is to describe current state of science and technology which deals with the issue of rotary tables for machine tools. Another goal of this work is to analyse individual components, which are rotary tables made of, and their appropriate aplication according to requirments for right function during machinnig operations.
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Evaluation of upsetting test
Vávra, Roman ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
This work is focused on theoretical and practical processing upsetting test. There is an explanation of their significance in engineering. Also, there are described various kinds of tests and their evaluation. Furthermore, the work deals with the experiment for a specified material MS 68. This material was compacted using two test machines equipped with measuring software. First machine is a hydraulic press CZR 600 with software DEWESoft and the second is a universal testing machine ZD 40 using software M-Test. An evaluation based on the collected data is included in the form of deformation resistance curves of tested material.
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Analysis of Circular Bars Shearing Process
Dohnalová, Eva ; Hůlka, Jiří (referee) ; Foret, Rudolf (advisor)
In these days customers require a high quality as well as precision of products together with a cost that is as low possible. The cost of products can be reduced in a way of batch production. Implementation of the batch production requires a detailed plan of a technological process to avoid making depreciated products or series of products. A software package can be used to simulate the technological process of shearing to avoid difficulties of particular technological process. This bachelor paper contains analysis of technological process of shearing of circular section rods. The results of the analysis are going to be included in FEM simulations. The effect of the technological process of shearing on material was determined by optical and scanning electron microscopy method. The microhardness measurement was used to analyse the deformation hardening of the examinated material.
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Analysis of cracking of aluminium profiles during bending process
Kalivoda, Ondřej ; Šebek, František (referee) ; Vosynek, Petr (advisor)
The presented thesis was created in cooperation with Siemens, s.r.o. and deals with the analysis of the bending of aluminium sheets. These products are used as conductors of electrical energy. The problem happened when the bending angle was 90 ° when there was a violation outside of the bend. The aim of the thesis is to verify whether the bend is correctly designed using analytical and empirical relations and the finite element method. Because of the requirement for running numerical simulation on one of the freely available software the Salome Meca program environment was used. The results of numerical simulation did not confirm that the violation should occur. In deeper analysis appeared doubts whether it is possible to correctly evaluated result only by data from tensile test. In the final part, there are recommended some experiments which would be necessary for the correct calibration of the ductil fracture criteria.
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Structure of Heat Resistant Steels
Skýba, Pavel ; Foret, Rudolf (referee) ; Jan, Vít (advisor)
This work is a compilation essay about structure of heat-resistant steels, creep, strengthening and heat treatment based on available literature sources. The main chapters of the work deal with creep deformation, its mechanisms and the ways of strengthening used in heat-resistant steels. Separate chapters deal specifically with precipitation strengthening, minority phases that can be found in heat-resistant steels and their heat treatment.
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Processing of reinforced alumina ceramics
Kachlík, Martin ; Trunec, Martin (referee) ; Maca, Karel (advisor)
Literature review of processing and toughening of bulk Al2O3 ceramics was performed. Based on performed experiments, optimal technological conditions of infiltration of alumina ceramics by nickel oxide and zirconia dioxide were found. These approaches were used for preparation of toughened alumina. The properties of sintered alumina matrix composites were discussed from the point of view of their hardness, bending strength, microstructure and phase composition.
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Material nonlinear static response of civil structures
Kinclová, Radka ; Vlk, Zbyněk (referee) ; Nevařil, Aleš (advisor)
The aim of this bachelor’s thesis is the non-linear elastic and plastic response of the simple beam structures. Also the problematics of the plastic hinges development is adressed. This thesis will then describe the origin and magnitude of the residual stresses caused by welding. Ideal elastic-plastic behavior of materials and elastic behavior with strenghtening will be used to determine the limit load capacity of the simple structures and will be compared to solution in the ANSYS software.
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Function and construction of burnishing tools
Hošková, Eliška ; Slaný, Martin (referee) ; Zemčík, Oskar (advisor)
Bachelor Thesis is aimed at chipless microfinishing burnishing rolled process. The thesis include principle of burnishing roller method, facilities and usage in view of requested properties of machina surface. The thesis include running conditions of burnishing roller, typem of tooling supplemented pictures of toolings made in Germany company Baublies AG accordance with using in production. Technical– economic evalution is described at the end of thesis.
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Rotary tables for machine tools
Novotný, Michal ; Holub, Michal (referee) ; Dokoupil, Vladimír (advisor)
The aim of this bachelor thesis is to describe current state of science and technology which deals with the issue of rotary tables for machine tools. Another goal of this work is to analyse individual components, which are rotary tables made of, and their appropriate aplication according to requirments for right function during machinnig operations.
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