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Sewing machine part manufacturing process
Švec, Michal ; Jaroš, Aleš (referee) ; Kalivoda, Milan (advisor)
The bachelor thesis focused on the production of a gear which is part of the sewing machine. In the first part is the gear wheel analyzed, including the description of his function. There is also a selection of the semi-product is described, including the calculation of the required amount of material. The following section describes the machines needed to manufacture the component, the tools which will be used during production and the technological process. In the next part is mentioned the system of spare parts in the company, the possibility of claiming or purchasing individual parts of sewing machines. The last part of the thesis is devoted to the technical and economic evaluation of the proposed production.
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A single-speed gearbox made by 3D printing
Hykolli, Denis ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
The aim of these theses was the creation of a single-stage gearbox by additive technology FDM / FFF. By chosen values was made dimension calculation for gears. The 3D model of the gearbox was designed in 3D software Autodesk Inventor. Single parts were produced on an FDM 3D printer by Prusa Research. Manufacturing programs for parts were prepared in PrusaSlicer. These programs were used for producing individuals parts on 3D Printer. Transparent material and printing parameters for the top of the gearbox were chosen by visual test and test of light intensity. The total cost of model production is calculated in the work. The result of these is a completely working model of a single-stage gearbox with a transparent top of the gearbox.
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Draft of pin production technology
Hrdlička, Martin ; Osička, Karel (referee) ; Jaroš, Aleš (advisor)
The Master's thesis, written during the study of M-STM Manufacturing Technology and Management in Industry, is focused on the concept of the production technology of a pin. The thesis includes a description of forming and machining technology in terms of possibilities of their application in the production of the pin. Furthermore, by comparing both technologies and preliminary economic evaluations of production, it leads to the choice of the production method. This production method is then described, and the description contains the production process steps including the creation of the CNC program. The conclusion of the thesis is devoted to the technical and economic evaluation of the production concept.
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Production of gear wheels with using dividing head
Cicha, Tereza ; Slaný, Martin (referee) ; Jaroš, Aleš (advisor)
The aim of this work is to characterize the production of gear wheels with using dividing head and also to produce the gear wheel by this method. The theoretical part of the bachelor thesis contains an overview of the machining methods for the production of gears and their characteristics. Theoretical chapters also contain a detailed description of the the production of gear wheels with using dividing head and materials used for the production of single gear tooth cutters. The aim of the practical part is to design, calculate and produce the gear wheel with using dividing head. The conclusion of the thesis is the overall summary and evaluation of the calculated data.
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Analysis of heat treatment effect on dimension shift
Kunkela, Ondřej ; Jaroš, Aleš (referee) ; Kolář, Ladislav (advisor)
This bachelor thesis focuses on chemical-heat steel processing, mainly to the size change caused by the process itself. To look into the problem closely some samples from various materials and of various size have been made. The samples were measured before and after the ionic nitridation. Likewise the samples, the real peaces were measured, some of them were ionic nitridated and some were cemented. The real pieces were made from the same material but they differed in size and shape. Subsequently, all the figures were processed and assessed.
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Measuring cycles in control systems of CNC machines
Hamřík, Jiří ; Jaroš, Aleš (referee) ; Gregor, Lukáš (advisor)
In the first two points, the bachelor's thesis focuses on the comparison of CNC and NC machines and methods of control and programming of CNC machines, a description of the control system of CNC machines from selected producers and the characteristics of measuring cycles. Two producers were selected to describe the technology of measuring tools and workpieces using probes. In the third point of the bachelor's thesis, a practical demonstration of measurements with tool and workpiece probes from RENISHAW is performed. A tool correction was performed followed by measurement of the workpiece with a probe. For statistical evaluation, digital micrometer measurements were added, including comparison and evaluation of the obtained results.
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An analysis of the heat-affected surface layer after grinding of the bearing rings
Filípek, Timotej ; Kalivoda, Milan (referee) ; Jaroš, Aleš (advisor)
The object of this bachelor thesis is a determination of the causes of burns origin at the surface layer of a workpiece after a grinding process and their elimination. The first chapter is focused on the description of the grinding technology, grinder types and grinding tools. The second chapter deals with the characterisation of the process fluids, their use and suitability depending on the cut conditions and the material. The third chapter explains what a burn is, the causes of its origin and the ways of subsequent elimination of this adverse event. The experimental part – performed in the Schaeffler Skalica, spol. s r.o. company – deals with the origin of the heat affected surface layer due to improper dressing grinding parameters and improper choice of intervals between dressing processes of the grinding wheel. At the experiment two different grinding wheels were used; subsequently, they were compared to each other from the point of view of suitability for the machining process. The final chapter comprises the experimental part assessment and a summary of the findings in this topic.
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Verification Technology of Pressure Valve Body
Majer, Lukáš ; Jaroš, Aleš (referee) ; Kalivoda, Milan (advisor)
This thesis is about verification defined machining time what were set by department of technology in company IMI CCI Brno. In work will be compared defined time, real time and theoretic time, what will be calculated. Theoretical time will includes new technology process where will be make proposal to change some tools.
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Influence of coatings on durability of cutting inserts during longitudinal turning
Balíček, Martin ; Sámelová, Vendula (referee) ; Jaroš, Aleš (advisor)
This thesis deals with the influence of deposited coatings for durability and tool wear during longitudinal turning of steel CSN 41 1600 (E335) and influence of wear and surface quality. The theoretical part is focused on characteristics of turning technology, application, manufacturing and methods of coating cemented carbide and tool wear. The experimental part of the thesis includes the evaluation of the measured values, a description of the material, used tools and machine tool. The values measured in the experiment imply that the most suitable of the tested tool inserts is WNMG 3-1-NF with applied coating TiAlN + TiN. Surface quality decreases with increasing wear of the tool.
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Designing and Producing a Differential Holder and Eccentric for a Formula Student Racing Car Using Workshop Oriented Programming and Modern CAD/CAM Technologies
Vejtasa, Vladimír ; Jaroš, Aleš (referee) ; Sedlák, Josef (advisor)
The present master thesis deals with the application of workshop programming and advanced CAD / CAM technology to the design and production of differential holder and eccentric of Formula Student car. The first part characterizes and describes the technology of milling, drilling and boring. There is also a selection of material to be machined, including the characteristics of aluminium and its alloys. The following section describes the construction of differential holder and eccentric in the parametric program Autodesk Inventor and creation of CNC programs using the workshop programming and CAM of PowerMILL system. The conclusion section refers to the production of both components in the training centre BOSCH DIESEL s.r.o in Jihlava. The thesis is concluded with a technical-economic evaluation and analysis of both proposed production variants.
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