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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
331

Optimalizace vybranch technologickch proces pi vrobÄ loiskovch komponent / Optimisation of Selected Technological Processes in the Production of Bearing Components

Otoupal­k, Jan January 2019 (has links)
The dissertation is focused on the optimization of technological processes in the production of the outer bearing ring. The first part of the research was focused on the latest trends in the production of bearings. In the experimental part the technological processes of production were analyzed from the choice of the semi-finished product to the optimization of finishing technologies for machining the outer diameter of the bearing ring.
332

Vřeteník a hlavní vřeteno horizontálního soustružnického centra / Headstock and main spindle of horizontal turning center

Suda, Martin January 2019 (has links)
The thesis deals with headstock and spindle of the universal turning center. In the introduction part is a destription of the headstock morfology. It describe how the spindle and headstock can be solved in terms of its bearing, installation, used clamping interface, lubrrication, cooling and sealing. The second part is devoted to the universals turning machines which are available on the market. In the final part is the practical solution of the headstock and spindle on which can be performed for milling and drilling operation instead of turning.
333

Vvoj multifunkÄn­ho obrbÄc­ho centra / Design of a multi-tasking machine tool

Macek, Robin January 2020 (has links)
This diploma thesis deals with the design of a selected structural part of multi-tasking machine tool. The solved construction part is the design of a turning table with the possibility of positioning with specified parameters. The research part is focused on CNC machine tools, multi-tasking machine tools and individual parts of turning tables with possible positioning. In a design part, the design of design variants of possible solutions is made and the choice of the design solution is made with the help of multicriteria analysis. Subsequently, the selected design solution is processed with the help of the necessary technical calculations. The result of the work is then a 3D model and the required drawing documentation.
334

Návrh vřeteníku malého soustruhu / Design of spindle for a small lathe

Šatný, Patrik January 2020 (has links)
The thesis deals with the design of a headstock for a small lathe. The first part of the thesis deals with the description of individual structural nodes related to the construction of machine tools headstock. The second part includes an overview of similar machines available on the market. The final part deals with the calculation of necessary parameters, the verification of results using the finite element method and the construction of the proposed headstock. Based on the designed construction is created 3D model and drawing documentation.
335

Obrábění kalených ocelí / Machining of hardened steels

Veselý, Ondřej January 2021 (has links)
Diploma thesis on Machining hardened steels is focused on the analysis of longitudinal turning of hardened steel 14 109 by using a tool from PKNB in terms of measuring the force load using a dynamometer and then evaluating the surface quality. The theoretical part deals with the issue of turning technology, cutting materials and heat treatment of steel. In the practical part, the influence of cutting conditions on the resulting values was assessed during the experiment. Twelve samples with different combinations of cutting conditions were tested, then was selected a sample that met the criterion of combining minimum cutting forces values and surface quality. The experiment shows that force load values can be achieved twice less by combining cutting conditions with an appropriate combination.
336

Mobilní soustružnické obráběcí centrum se svislou osou obrobku / Mobile turning machining center with vertical workpiece axis

Pomikálek, Adam January 2021 (has links)
The subject of this diploma thesis is the conceptual design of a mobile lathe centre with a vertical workpiece axis. First, a search in the field of mobile lathes, stationary lathes and methods of their transport is performed. Then, from the described transport machine options, the most suitable transport variant is selected, thanks to which variants of the mobile machine solution are created. Subsequently, the design of the winning variant is fully adapted to the method of transport using containers. Emphasis is placed on simple construction, maximum use of the transport packaging in the machine frame and easy assembly of the machine customer. For these reasons, the machine frame must consist of two containers. Finally, the assembly and adjustment of the machine tool are solved in combination with the verification of the functionality of the proposed concept.
337

Projekt lehké obrobny v TOS Kuřim - OS, a.s. - soustružnické pracoviště / Project of the light machinery production in TOS Kuřim - OS, a.s. - workshop for the turning machines

Pernica, Jan January 2008 (has links)
Master's thesis deals with the design layout of the workplace in light machinery production in TOS Kuřim-OS, as. On this workplace is turning rotating parts are manufactured in the weight of 250 kg. Proposals arrangement based on how the current state and the methodology of the design layout. It is also based on the use of machines and parameters, security principles and the possibility of new premises. To evaluate the best options are proposed criteria, which are determined by the most appropriate solution. For the chosen variant is created by the project, which includes the cost of setting up an evaluation, documentation and the benefits that arise from this option for the workplace.
338

Optimalizace výrobního procesu / Production process optimization

Hejzlar, Aleš January 2008 (has links)
This diploma thesis deals with the production process optimization. The cutting operation and the lathe-turning issue is described in this thesis. In the practical part the production process is analyzed, the designed experiment (DOE) is suggested and evaluated. In the end of the practical part there is the evaluation of the machined material in the light of microstructure. On the basis of the partial findings the enclosures are done and the recommendations leading to the production optimization are suggested.
339

Analýza tvorby třísky pomocí digitální vysokorychlostní kamery / Analysis of chip forming mechanism with a high-speed digital camera

Kubela, Petr January 2009 (has links)
In live we often involve monitoring of very fast actions, that are not observable by the human eye. The thesis focuses on possibilities of high speed digital cameras, their application in industry, and the mechanism of chip formation. The experiment part aims to record the chosen process of chip machining and the problems of necessary illumination during the process of object imaging.
340

Řezné nástroje při výrobě zbraňových součástek / Cutting Tools for Production of Weapon Parts

Hanus, Vladimír January 2010 (has links)
his Diploma thesis concentrates on problems related to cutting tools, their wear, durability, and cutting conditions. The work provides basic analysis of technology applied to two selected parts. Further, there is also analysis of cutting tools suppliers. The work gives brief characteristics of the basic types of wear and their origins. In the experimental section is a statistical evaluation of selected tools, calculation of optimal cutting conditions and durability, and finally selected tools wear evaluated. The technical and economical evaluation compares cutting conditions provided in theory with the real cutting conditions.

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