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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.
11

Konstrukční návrh dřevoobráběcího stroje / Construction design of woodworking machinery

Doležal, Martin January 2012 (has links)
This thesis deals with designing woodworking piece of machinery for thicknessing technology, surfacing planer, cutting and mortising, which are combined by changeable adapters. Thesis cointains a survey of selected woodworking machinery and technologies. It also provides an overview of safety rules for manipulation with woodworking machines and also safety features the machinery must comprise. The technical evaluation is included.
12

Optimalizace operačních nákladů obráběcího procesu / Optimalization of operating costs machining of process

Dostálová, Markéta January 2013 (has links)
This work deals with operating production costs in machining process and further optimalization. In the first chapter, individual costs items which are related to machining process are specified. These cost items are quantified and total production costs are acquired. Optimalization of operation production costs are described for criterion of minimal production costs and criterion of maximal productivity are described in next chapter. Practical part of this work is focused to apply each individual criterion in practical example. There is CD with programs attached to this work. The goal is to find optimal combination of cutting speed, sufficient life time of cutting tool and suitable cutting technology so that chosen criterion can be acceptable.
13

Racionalizace technologie výroby / Rationalisation of production technology

Konečný, Petr January 2014 (has links)
This thesis deals with the rationalization of production technology of selected component. The first part contains a brief introduction of the company NTS Prometal Machining s.r.o. and brief description of the product. The following section is an analysis of existing manufacturing technology. The practical part is focusing on the proposal of rationalization versions of the production process. After evaluation of all possible options of rationalization there has been developed a new technological process with a respect to time and cost savings. Finally there was carried out economical evaluation and recommendation for further production of this component.
14

Slinuté karbidy a jejich efektivní využití / Cemented carbides and theirs effective use

Dembek, Jiří January 2010 (has links)
This diploma thesis is aimed on cutting tools made of cemented carbides. It characterizes marking, production and properties of non-coating and coating cemented carbides and describes the latest trends in coating. Target of this diploma thesis is comparison of assortment of two important world’s producers and one Czech producer in term of used productive technologies, products microstructure, coatings types, coatings methods and possibilities of their usage. Cutting data were evaluated and compared from obtained technical knowledge, which were recommended by chosen producers for effective turning application of their cutting tools. Recommended cutting speeds were found out for specific type of cutting material according to ISO, width depth of cut and for specific values of feeds per revolution.
15

Analýza vysoceproduktivního vystružování / On The Analyse of High Productive Reaming Technology

Gashkova, Irina January 2011 (has links)
Diplomová práce se zabývá analýzou technologie vysoceproduktivního vystružování. V rámci práce byly provedeny testy vystružování za různých technologických podmínek (vc=40, 60, 80, 100 m/min; f=0.2, 0.4, 0.6, 0.8 mm) na materiálu austenitické oceli DIN 1.4404 při použití vystružovací hlavicí MT3. Jednotlivé operace vystružování byly porovnány z hlediska parametrů jako tlačná síla, krouticí moment, výsledná drsnost obrobeného povrchu a dále z hlediska tvaru třísky. Následně byly vypočítány průměrné hodnoty a směrodatná odchylka naměřených parametrů. Dále bylo provedeno porovnání pomocí diagramů. Výsledky ukazují lepší kvalitu, nižší drsnost povrchu (Ra 0,37 µm) a méně zdeformovanou třísku při pomalejších řezných rychlostech (40 m/min) a menším posuvu na otáčku (0,2 mm). Výsledky také ukazují nárůst tlačné síly a krouticího momentu za uvedených technologických podmínek. Při zvyšující se řezné rychlosti vystružování tyto silové účinky klesají.
16

Optimalizace obráběcích parametrů abradable nástřiků používaných v leteckém průmyslu / Optimization of Machining Parameters Abradable Sprayed used in the Aerospace Industry

Krajkovič, Pavel January 2015 (has links)
This thesis is focused on machining of thermal spray coatings. Particularly on testing of machining parameters and their influence on different types of abradable coatings used in the aerospace industry. The aim of research work is to test the parameters, measure cutting forces by using a dynamometer and their impact on the quality of the machined surface. Determination of the optimal machining parameters for different types of coatings based on results of measurements and the evaluation of surface quality. There are also presented techniques of thermal spray application and methods of coating evaluation. Further it describes a method of measuring cutting forces by using the dynamometer and methods of surface quality evaluation.

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