The fully fashioned master’s thesis within the frame of the master’s study at the Fakulty of mechanical engineering deals with subject woodworking tools. There are characteristics of wood and tool materials used for woodworking. There is an emphasis on milling cutter in each case of construction of selected woodworking tools. Whereas there is concrete proposal of milling cutter used for production of half round profile – half round concave cutter – at the end of the thesis.

This master's thesis summarizes information about the machining tests. The thesis describes the mechanisms and forms of cutting tool wear. Part of the thesis is analysis of the current state of Pramet Tools Company machining tests database application. The result of the thesis is complete new database application design.

KVAPIL Jan: Bending and cutting press machine for representativ part The Master´s thesis, which is developer in an undergraduate degrese in M-VSR, provides a brief overview and description of the cutting and bending technology. The thesis is carried out the calculation, which is essential for the design cutting and bending tools. Models and design are created in the software SolidWorks 2012. The Master´s thesis includes a general procedure after the award until after copy the parts on it.

The price of the tools for making prototypes and small series of products, as well as the cost of additional changes in the tool are quite high and increase the price of the final product. A flexible tool provides an advantageous solution to create a wide variety of molds. In this thesis the area of flexible tooling is introduced. An experimental mechanism has been manufactured and tested. With the help of a methodical approach several solutions for a flexible tool design have been proposed. Based on the evaluation of all given criteria, the most suited version has been designed and manufactured. The tool has been tested and evaluated for the thermoforming process. Improvements and potential applications have been suggested. The results show that the flexible tool has some limitations but has a broad potential use in several applications.

In dieser Grundlagenstudie wird evaluiert wie präzise 3D-Gesichtsaufnahmen eines Patientenkollektivs mit einer Lippen-, Kiefer-, Gaumenspalte mit dem 3D-Bildaufnahmesystem Vectra M3 (Canfield) und der Analysesoftware Facial Analysis Tool (FAT), entwickelt in der Abteilung MKG der Universität Leipzig, analysiert werden können. Im ersten Studienabschnitt werden 3D-Gesichtsaufnahmen von 3 Patienten und einem Modellkopf erstellt und für 62 manuell festgelegte Landmarken (LM) 10-mal die x-, y-, z-Koordinaten bestimmt. Die statistisch ermittelten prozentualen Variationskoeffizienten und die FAT-Beurteilungen der Messdaten werden graphisch verglichen und zeigen eine gute Übereinstimmung. Die Präzision der LM-Positionierungen ist Landmarken-abhängig Im zweiten Abschnitt werden an 91 Patienten mit unterschiedlichen Spaltdiagnosen jeweils 146 Distanzen aus LM und auch konstruierten Punkten mittels FAT ermittelt. Die prozentualen Variationskoeffizienten der Messdaten der Patientenkollektive werden nach Spaltdiagnose (beid-, rechts-, linksseitiger LKG-Spalte und Minimalvarianten), nach Geschlecht und Alter (≤ , >16 Jahre) graphisch ausgewertet. Die Variationskoeffizienten der Distanzen innerhalb einer Patientengruppe sind vergleichsweise hoch, insbesondere im Nasen- / Mundbereich mit kleinen Distanzen. Eine Differenzierung nach Geschlecht und Alter ist nicht möglich. Im dritten Abschnitt werden Symmetrieindizes für 36 Distanzen von den nach Spaltdiagnose gruppierten 91 Patienten errechnet und graphisch ausgewertet. Die Patienten mit einer einseitigen Anomalie weisen im Nasen- / Mundbereich eine erhöhte Asymmetrie auf. Bei den Patienten mit rechtsseitiger LKG-Spalte sind die Distanzen in der rechten Gesichtshälfte des fehlgebildeten Bereichs im Mittel größer als in der linken, bei linksseitiger LKG-Spalte sich diese Verhältnisse umgekehrt.

No description available.

This dissertation thesis is focused on the problem of the Automatic Tool Change for milling centers, which is recently shown as a very current topic. The content of this work is to conduct a comprehensive research of various types of ATC depending on the type of machine, as well as research of the current tool interface relating closely with these problems. There was made a comprehensive analysis on the basis of data obtained by comprehensive research, from which both the main factors affecting this topic and the area dealed and developed by this work resulted. The most problematic area of machinery used nowdays for the Atomatic Tool Change was detected as manipulator provided the exchange between spindle and tool storage. Kinematic structure and design of individual elements affects very significantly the dynamics of the whole process of exchange of tools. Therefore, the work is focused on problematic of the manipulator. The main results of this thesis are constructional design of several types of manipulators, which were partly realized within the project 1.2.4 of Brno department of RCMT in the form of the testing stands. There was developed simulation models for selected types of manipulators which were verificated by measuring on the real stand. On the basis of abovementioned problem there was identified another key issue related not only to the exchange process but also with complex problem of service life of spindle. It is a grab force in the process of picking tools. The work outlines the possibilities for further research of these forces on the service file of spindle (especially on service life of bering groups of spindle).

No description available.

The heat input to the tool has been investigated for friction stir welding (FSW) of aluminum alloy AL 7075-T7351 over a wide range of process operating parameters using a combined experimental/numerical approach. In a statistical Design of Experiments fashion, 54 experimental welds (bead-on-plate) were performed at 27 different parameter combinations. Measured outputs during each of the welds included forces in all three coordinate directions and internal temperature of the rotating tool at three locations near the tool/workpiece interface. The heat input to the tool was also identified for each weld using infrared imaging temperature measurement techniques and the portion of the total mechanical power entering the tool was calculated. These values were subsequently analyzed to identify the effect of process operating parameters. Two-dimensional, axisymmetric numerical heat conduction models of the tool were then produced and the approximate spatial distribution of the heat input to the tool along the tool/workpiece interface was identified. Experimental values for the heat input to the tool ranged from 155 W to 200 W, comprising 2.8% to 5.1% of the total mechanical power. Regression equations developed for the two values show that each is a function of the process operating parameters. Heat conduction models of the tool show that the approximate spatial distribution of the heat input to the tool along the tool/workpiece interface is one where the heat input is distributed non-uniformly along the interface, with 1% entering the tool at the pin, 20% entering at the base of the pin, and the remainder entering the flat portion of the shoulder. This distribution was valid for the majority of process operating parameter combinations tested. The maximum predicted temperature for the simulations occurred in the pin. This result was verified by the experimental tool temperature measurements. Insights gained into the FSW process from the combined experimental/numerical investigation were then discussed.

Ett problem då en akademisk uppsats skall vetenskapligt utvärderas är att examinatorn måste kunna, på ett så objektivt sätt som möjligt, utreda om uppsatsen uppfyller krav på vetenskaplig sannolikhet. Allt för att arbetet skall tillåtas nå den praktiska tillämpningen hos allmänheten. Med vetenskaplig sannolikhet menas alltså den grad som en teori kan användas i verkligheten med lyckat resultat. Detta kräver mer utveckling och anpassning av verktyg att fylla ett gap i den akademiska världens förbättringsarbete. Att släppa en uppsats som ligger långt från sanningen kan vara både farligt och ekonomiskt förödande. Därmed är syftet och målsättningen med denna uppsats att utvärdera hjälpmedel som ger forskare (deltagare) i den akademiska världen (miljö) möjlighet att bedöma (fenomen) eget och andras akademiska vetenskapliga arbeten. Hjälpmedlen (undersökningsobjekten) som används i denna fallstudie är dels en matris och som byggts för ändamålet, dels en klassisk mognadsmodell. För att uppnå syftet genomförs en kvalitativ undersökning med observationsschema och innehållsanalys på verktygen som jämförs i en analys, då denna metod fungerar med vald design (fallstudie, tvärsnittsdesign och komparativ jämförelse). Resultatet av studien visar att förbättringsverktyg kan användas till att utvärdera uppsatser processinriktat med tillägg av etiska ställningstagande. Uppsatsgranskaren påverkar i detta analysen av uppsatsen genom val av strategi, där varje valmöjlighet utgår från samma vision. Det är i detta centralt att välja rätt strategi så att uppsatsförfattarna påverkas positivt. Centralt är också antalet subjektiva beslut, vilket påverkar objektivitetsgraden. Styrkan i slutsatsen är att den behandlar flera dimensioner av uppsatsgranskningen. Dock kan slutresultatet påverkats av det engagemang uppsatsförfattaren, till denna uppsats, känner för innovationen av det nya matrisverktyget. Detta är ett etiskt dilemma. / This thesis raises a problem when an academic paper is to be scientifically evaluated. The examiner must be able to see, in the most objective way possible, whether the thesis meets the requirements of scientific probability, for the work to be allowed to reach the practical application of the public. This requires more development and adaptation of tools to fill a gap in the academic world's improvement work. Releasing an essay that is far from the truth can be both dangerous and financially devastating. Thus, the purpose and goal of this thesis is to evaluate aids that give researchers (participants) in academia (environment) the opportunity to assess (phenomena) own and others' academic scientific work. The means (study objects) used in this case study are partly a matrix and built for the purpose, and partly a classic maturation model. To achieve this purpose, a qualitative survey with observation scheme and content analysis is carried out on the tools, as this method works with the selected design (case study, cross-sectional design, and comparative comparison). The results of the study show that improvement tools can be used to evaluate essays process-oriented with the addition of ethical stances. In this essay, the essay reviewer influences the analysis of the thesis by choosing a strategy, where each choice is based on the same vision. It is central to choose the right strategy so that the essay authors are positively affected. Also central is the number of subjective decisions, which affects the degree of objectivity. The strength of the conclusion is that it deals with several dimensions of the essay review. However, the result may be influenced by the commitment the essay author of this paper feels to the innovation of the new matrix tool, which is an ethical dilemma. / <p>2022-06-05</p>