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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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Design of production technology for a drive transmission shaft of a snow blower
Ulak, Ondřej ; Dvořáková, Jana (referee) ; Sliwková, Petra (advisor)
This bachelor thesis deals with the design of the technology for the production of a gear shaft for the drive of a snow blower. Its aim is a complete production design including component analysis, selection of production technology and design of production area. One of the main parts is also an economic evaluation, including a time schedule. In the course of the work, the choice of blank, cutting conditions, machining times, machine capacity and the design of machinery are addressed. The proposed technology shows that the shaft can be machined in two machining operations, turning and grinding. The project is economically profitable, the return on investment is within 3 years from the start of mass production.
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Design and production of a CNC engraving machine using an LED laser module
Novotný, Matěj ; Zemčík, Oskar (referee) ; Dvořáková, Jana (advisor)
This work focuses on the evaluation of the current state of the art and comparison of the properties of beam unconventional technologies. It discusses laser devices and the engraving process. It then focuses on the design and fabrication of a CNC engraving machine assembly using LED laser module. It describes the components used individually, their function, features, equipment to design and then the complete physical assembly of the device. Functionality was tested based on several engraving and cutting tests. Finally, the economic part of the project was discussed.
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On the cutting performance of selected HSS drills
Med, Slavomír ; Dvořáková, Jana (referee) ; Píška, Miroslav (advisor)
The bachelor thesis aims on a twist drill. In the theorical part characterizes the parts of drill bit and presents its fabrication from fabrication of cutting material to coating. This part finishes by description of contemporary methods of measuring of cutting performance. The main goal of this thesis is to propose and realize measuring of cutting performance of which results we can compare selected HSS drill bits and recommend them to practice. The tests are described in the practical part which contains the evaluation of results too.
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A drilling jig for beekeeping frames
Mrkvica, Jan ; Dvořáková, Jana (referee) ; Dvořák, Jaromír (advisor)
Submitted bachelor thesis deals with drilling jig for beekeepering frames and consists of three main parts. In the first part is described the definition of jigs and their basic distribution. After that are explain basic principles of drilling and distribution of borers. In the second part is analyzed availability of drilling jigs on the market. The third, practital part, deals with design and construction of a drilling jig for beekeeping frames, with emphasis on the simplicity of production without the use of special tools. The whole jig was designed in 3D CAD software Solidworks and then physically assembled. Price calculation for the production of the jig is also included in this thesis.
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