• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 194
  • 11
  • Tagged with
  • 205
  • 167
  • 58
  • 34
  • 31
  • 31
  • 30
  • 29
  • 28
  • 27
  • 26
  • 26
  • 24
  • 22
  • 20
  • 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.
131

Návrh výrobní technologie pro zdvihací zařízení chladiče traktoru / Production technology of a lifting equipment for tractor cooler

Raiskup, Martin January 2019 (has links)
The thesis focuses on production technology of the lifting equipment for a tractor cooler. This device is used in order to ease the installation of a cooler during the manufacturing of a tractor. In the first chapter, various types of the lifting equipment are described. In the following chapters manufacturing methods, machines and tools for the production of the specific component are described. Furthermore, materials and manufacturing processes for the complementation of the specific component are proposed. In the conclusion, the methods for the manufacturing are suggested, the timescale is calculated and the technical-economical evaluation is performed.
132

Elektroerozivní obrábění materiálů využívaných v leteckém průmyslu / Electroerosion machining of materials used in the aerospace industry

Zubáková, Alexandra January 2020 (has links)
This diploma thesis deals with the issue of electroerosion machining of materials used in the aerospace industry. The introductory part presents the layout of aerospace materials and the methods by which they can be machined. The next chapter describes the basic principles of EDM. The experimental part is focused on electroerosive cutting of NIMONIC 263 alloy. The greatest emphasis was placed on determining the influence of the cutting wire material on the rate of contamination of the surface layer of the workpiece. The quality of the machined surface was assessed depending on the used wire and the selected machining parameters.
133

Rozbor výsledků z experimentálního elektroerozivního hloubení speciálních materiálů pro letecký průmysl / Analysis of results from experimental electrodischarge sinking of special materials for aerospace industry

Macháčová, Veronika January 2020 (has links)
The aim of this master's thesis is experimental electric discharge sinking of special materials for the aerospace industry. The first part is a general overview regarding the technology of electric discharge machining with emphasis on electric discharge sinking. Following this is a practical part devoted to the electric discharge sinking of the Nimonic 263 material with a copper tool electrode with a subsequent evaluation of surface and subsurface changes in this material. The wear of the tool electrode is also examined with the conclusion highlighting combination of machined material and tool electrode material behave in different working conditions and how the surface layer of machined material is affected.
134

Experimentální elektroerozivní obrábění speciálních materiálů pro letecký průmysl / Experimental electroerosion machining of special materials for aerospace industry

Líkař, Martin January 2020 (has links)
This master´s thesis deals with the issues of electroerosive machining material used in aerospace industry. The master´s thesis is divided into the theoretical and practical part. In the theoretical part is described electroerosive machining with a focus on electrical discharge sinking. One section of the theoretical part is an analysis of materials used in the aerospace industry. The practical part of the master´s thesis is focused on electrical discharge sinking of aerospace material INCO 713LC, here is investigated the influence of machining parameters on the surface of the workpiece and tool.
135

Optický návrh telecentrického f-theta objektivu / Optical design of telecentric F-theta objective

Perháč, Timotej January 2020 (has links)
This thesis deals with optical design of f-theta lens for purposes of precision micromachining using a laser beam. Optical design consists of creating a nominal design according to specifications given by Meopta – optika s.r.o company and a tolerance analysis, which describes manufacturability of given design. Specifications given are most importantly diffraction limited image quality, correction of distortion throughout the field and telecentricity of systém in image space. F-theta lens in this thesis was created using an optical design software called Zemax.
136

Analýza textury objektů v zorném poli kamery / Image analysis of object surface texture

Klimeš, Jiří January 2021 (has links)
This master thesis deals with design and implementation of algorithms for image analysis of object surface texture for the purpose of automating the surface grinding process. In the first part of this thesis, a search was performed in the field of image analysis of object surface texture. The proposed descriptors were tested on the created annotated database of texture images. Subsequently, a scene for image acquisition of the machined object was designed and assembled, and the grinding process was automated based on the results of the previous analysis. The implementation and achieved results were evaluated and other possible improvements were proposed.
137

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.
138

Návrh a realizace CO2 Laseru s výkonem do 100W / Design and realization of CO2 laser with power up to 100W

Šrenk, Jakub January 2021 (has links)
This work is focused on the problematics of small CO2 lasers and their possible use for commercial production. The first part describes devices available on the market and evaluation of their parameters. The practical part specifies the parameters that arise from the potential use of technology. Based on these parameters, design of the machine and its complete mechanical design are elaborated. Furthermore, the experimental part deals with the design of structural components, control system, electrical systems and in general a complex technical-technological solution of the equipment, including economic evaluation of the design. Part of the work is also the construction of the machine itself, including activation, adjustment and debugging for the considered production. The constructed machine was subject to testing to ensure required quality of production.
139

Možnosti řídicího systému Heidenhain při programování CNC obráběcích strojů / Heidenhain tools for programming of CNC machines

Farka, Jan January 2021 (has links)
Modern machine tools are equipped with control systems, which are the imaginary brain of the whole machine. These control systems are developed, further managed, and constantly innovated by many companies, so it is clear that there is a kind of competition in the field of control systems. The aim of this work is mainly to describe the possibilities of one of the greats among developers of control systems from the company Heidenhain and also a thorough comparison of this system with systems from other manufacturers. Last but not least, other Heidenhain products and their possibility of use in practice will be presented in the work.
140

Řešení technologie pro součást "hřídel parní turbíny" s optimalizací tvarově složité plochy / Solution technology of production "hřídel parní turbíny"-part with effective usage of contoured surface

Vacenovský, Igor January 2008 (has links)
The aim of this work is to suggest the solution for the new technology of rotor grooves machining for vanes of the steam turbine. It contains the technology of rotor grooves machining. Various criteria are taken into account and the final solution is adapted to the conditions of EKOL, spol. s r.o. company. Technical and economical evaluation.

Page generated in 0.0535 seconds