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Apartment Building, Trebic
Dvořáková, Jana ; Vlach, František (referee) ; Bečkovský, David (advisor)
The aim of this bachelor thesis is to elaborate the project documentation of a new-built apartment building in Trebic, located in the Vysocina region. The apartment house is without cellar with three above-ground floors and one main entrance to the building. A total of six residentail units and common areas for the residents of the house. The vertical loadbearing structures are made of heat-insulating blocks. The horizontal loadbearing structures and staircase are made of reinforced monolithic concrete slab. The roof consists of a flat roof with extensive green and a single-layer flat roof. Windows and doors are plastic. The bulit will beg as heating. There are twelve parking spaces on the ground.
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Grinding of titanium alloy Ti-6Al-4V ELI
Chalupa, Adam ; Dvořáková, Jana (referee) ; Píška, Miroslav (advisor)
This bachelor thesis is focused on titanium alloys. The first part covers the properties and practical uses of titanium alloys whilst the second part describes the issue of machining titanium alloys. In particular, the specific advantages and disadvantages of grinding titanium alloys. As part of the practical undertaking of this thesis, a titanium alloy Ti-6Al-4V ELI was ground, for which I measured the achieved surface quality and the forces occurring during grinding.
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Cutting ceramics and its effective use
Podešva, Lukáš ; Dvořáková, Jana (referee) ; Humár, Anton (advisor)
In the first part of this diploma thesis there are discribed basic findings about cutting ceramics (sorts, notation, structure, physical-mechanical properties, using, production) and it evaluates this tool material from the aspect of cutting power. The second part focuses on complex data processing about assortment of ceramics cutting materials of significant tool materials producers and comparison of service conditions (kind of mechanided materials, cutting conditions), which are recommend for effective turning by producers.
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Manufacturing technology design of the automotive door hinge
Dvořáková, Jana ; Císařová, Michaela (referee) ; Dvořák, Milan (advisor)
The bachelor thesis presents a production proposal of an automotive door hinge from the sheet metal ČSN 11 321 and an economic evaluation of the chosen variant. The hinge is produced in a combined tool by shearing and bending operations. The tool is clamped to a ZH 2500-2000 NG mechanical press with a nominal force of 2500 kN. Because of the press parameters, alternative solutions are proposed that could lead to an increased capacity utilization. Part of the thesis is a literary research, the output of this research is an overview of cutting technologies with evaluation of their suitability for production of the given part, theory of bending and stamping technologies, a brief outline of the possibility of component production by a method of additive manufacturing and theoretical calculations. Technical variants of series production tools are compared as part of the technical and economic evaluation. Drawing documentation of a component and of a tool are listed in the attachment.
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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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On the modern technologies of thread production
Mišák, Ondřej ; Dvořáková, Jana (referee) ; Píška, Miroslav (advisor)
This bachelor's thesis deals with the study of threads, specifically the introduction to the basic geometry of threads, their production and modern trends by which threads can be made. The experimental part is devoted to the production of threads using cutting and forming taps, comparison of force and moment loads and damage caused during the production of threads when changing the cutting speed. In the end, the achieved results of experimental tests and their evaluation are summarized.
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On the analysis of thin-wall parts sawing
Spáčil, Radek ; Dvořáková, Jana (referee) ; Píška, Miroslav (advisor)
Master‘s thesis deals with sawing of the thin-walled parts with high speed steel slitting saw. At first the most used conventional and unconventional possibilities of materiál cutting are described by a form of search. The next chapter describes forces arising from splitting saw machining, including their dependence on a specific cutting force, a chip cross section and a engagement angle. The second part of the thesis deals with the technological improvement of the cutting process, where three possible solutions are considered – geometry of the cutting tool, PVD coating deposition of the cutting tool and process fluid change. In the experimental part non coated slitting saw with burrs, non coated deburred slitting saw and coated slitting saws are compared. Used coatings were Ti(C,N), Cr-Al-Si-N, Al-Cr-B-N, and TripleCoating Cr, which is consisting of three layers TiN + (Al,Ti)N + Cr-Al-Si-N. The experiment has shown that the cutting forces inceases as the edge radius and wear level of the cutting tool increases. Coated cuttung tools has shown lower differences between the first and the last cut. Slitting saws have been also used in real cutting process to verify experimental results.
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Turning of steels at low depths of cut
Tichá, Dana ; Dvořáková, Jana (referee) ; Dvořák, Jaromír (advisor)
Thesis is devoted to the analysis of the competition of indexable cutting inserts, which are used for turning at lower cutting widths of the blade than the tip radius. Thesis is an analysis of five indexable cutting inserts from diferent companies. Furthermore the chip breakers of selected inserts are compared and finally the testing of the insert and its results based on metal chip shapes are described.
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Multifunctional building Pardubice
Dvořáková, Jana ; Utíkal, Aleš (referee) ; Utíkalová, Ivana (advisor)
The Master thesis presents a design of the multifunctional building in City of Pardubice. The building has three functions: caffe house, administration and also housing. The building has four floor without basement and there is a level roof. I tis designed as a reinforced concrete frame and walls with ventilated fasade do not have a bearing function. Design of building mens the general technical requirements for the construction.
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