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Optimization of Machining Parameters Abradable Sprayed used in the Aerospace Industry
Krajkovič, Pavel ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
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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Abrasive Water Jet
Kopečný, Libor ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
This dissertation thesis is focused on explaining the broad issue of the non-conventional machining by an abrasive water jet. Introductory chapters deal with various techniques and methods of water-jet cutting and analyze them. Then the following text provides us with a detailed description of the machine itself so that people can understand the way how this technology works. The third chapter is focused on the quality of the resulting surface and the possibility of affecting it by technological parameters. This part is connected with the practical part of my thesis, in which the resultant surfaces of various materials made by different cutting parameters were compared. Subsequent section outlines the development of this technology. The last chapter contains technical and economic evaluation.
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Ověření vlastností nátěrových hmot v rohových spojích okenních rámů
Hadačová, Jana
The thesis focuses on a verification of coating quality in the area of construction joints of a window frame and a casement. Individual samples of eight windows were long term exposed to laboratory conditions that simulate extreme weather conditions during all climatic periods. The main aim of the partial examinations is to obtain information on the quality of different coatings, especially on their adhesion, elasticity, and resistance to temperature changes. The practical part of the thesis is dealing with assessing and documentation of sample states, especially their corner joints, at the beginning of the experiment, as well as during and after the testing. All changes are thoroughly recorded as evidenced by the detailed visual documentation. In the final part, the tests are evaluated with emphasis on frequent defects that occur in practice. The issue of window surface finishes is still an ongoing topic, many problems often occurring in few months after placing windows into the building must be dealt with.
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Optimalizace parametrů obrábění na CNC stroji
Parys, Roman
The bachelor thesis deals with assessing the surface quality of samples from solid wood milling on the CNC machine. The first part describes the process of milling, methods of the surface quality evaluation and used parameters. In the experimental part of the work is presented the preparation of samples on the CNC machine and a measuring methodology using the device Talysurf CLI 1000. The surface quality is evaluated on samples from spruce and beech, because they are our the most widespread and most commonly used wood species. In conclusion, there is the actual results of the evaluation of surface roughness and waviness and recommendations for practice.
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