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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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Factors affecting the quality of machined surfaces after milling operation
Černý, Libor ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
This diploma thesis deals with the final quality of the surface under variable working conditions during milling. The first part deals with the definition of qualitative parameters describing surface properties. This is followed by a brief description of the cutting resistance measurements. The thesis is complemented by experimental verification using front milling and its evaluation. The aim of the experiment is to determine the dependence of the surface quality and the size of cutting resistors under the variable working conditions of the machine that do not make a common part of the manufacturing processes.
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Proposal for the production of variants of flat sheet metal parts with holes
Hamáček, Petr ; Vonka, Vladimír (referee) ; Špaček, Jindřich (advisor)
HAMÁČEK Petr: Proposal for the production of variants of flat sheet metal parts with holes. The final work of bachalors studies, 3th grade, academic year 2008/2009. FME VUT in Brno, Institute of manufacturing technology, department of metal forming and plastics. Bachelor work elaborated in the scope of bachalor studies of the branch B2307 submitted variants of production for flat sheet metal parts with holes. Theoretical part of the thesis is pointed to theory of cutting and description of personál cutting process. Shearing machine LEPP with shearing force 1000 kN is selected. Blanking puch and blanking are made from 19 class alloyed instrumental steels, heat treated according to graphical documentation. Cuttingin machine is using standardized components and it is solved by particular frame into eccentric machine. In the work there are implied necessary calcullations for both variants including economical evaluation.
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On the milling of refractory ceramic materials
Reiter, Milan ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
Diploma thesis is focused on machining of refractory ceramics materials. The theoretical part describes the division of ceramics materials, their structure, manufacture and properties. This part also contains the division of refractory ceramics. In the second chapter, of ceramics materials are described machining. The latest chapter is focused on analyzing the machinability of ceramics materials R - SLI - K. During the experiment, cutting conditions were changed and cutting forces were checked. Then surface roughness was measured and tool wear was observed.
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Machining of titanium alloys
Kinc, Jiří ; Humár, Anton (referee) ; Píška, Miroslav (advisor)
This thesis describe titanium and titanium alloys from the perspective of charakter, production and use. Thesis gives information about difficulty connected with machining titanium by basic machining methods. Titanium alloy Ti6A14V was turned in practical part. Intention was to measure cutting force and specific cutting force.
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Construction design of woodworking machinery
Doležal, Martin ; Pavlík, Jan (referee) ; Holub, Michal (advisor)
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.
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Design of cutter head with Harmonic-Drive application
Tkadlec, Dušan ; Dosedla, Michal (referee) ; Holub, Michal (advisor)
This master´s work deal with design two axis cutter head with possible variants drive of axis. The part of this work is also technical– economics valuation of single variants, calculation torque and force from motor head and design taking head in two axis. Cutter head should be applicated to boring and cutting headstock given to type with posibility of adaptive exchenges spindle.
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Vliv konstrukce pilového kotouče na proces dělení aglomerovaných materiálů konstantní podávací silou
Poukar, Martin
This thesis focuses on the influence of the number of teeth on a saw blade on the cutting process of wood chipboard and wood fiberboard. It investigates how the number of teeth affects different parameters such as cutting force and specific cutting resistance. The experiment was conducted using four similar blades with varying numbers of teeth under constant feed force. The conclusions show that the cutting force per tooth linearly increases with decreasing number of teeth on the blade, and the specific cutting resistance exponentially decreases with decreasing number of teeth. These results are consistent with the literature assumptions. To select a suitable saw blade, it is necessary to consider multiple factors.
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Vliv modifikace bukového dřeva na parametry obrábění
Vencl, Jakub
The Bachelor´s thesis is focused on the observation of effect of beech wood modification on the energy parameters of chip machining. It is about a comparison of modifications of beech, i.e. Lignamon and Bendywood which will be compared to native beech. In the case of native wood, the results of experimental measurements were also compared to results calculated with conventional methods. The methods which were used were: Technological-statistical and Analytical method. The primary investigation was cutting force. It was found that modification of beech wood does not have a statistically significant effect on machining parameters. In a comparison of two theoretical methods in the case of native wood was found that the Technological-statistical method had better sameness with experiment. The disadvantege of those methods is that they cannot be used for modified wood.
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Energetické parametry při formátování aglomerovaných materiálů
Pitrman, Dobroslav
This bachelor's thesis is devoted to energy parameters while formatting agglomerated materials (MDF, Particleboard, OSB). This is primarily the effect of chip thickness on the cutting and sliding force size when cutting individual materials. During the experiment, different saw blades with different body modifications were used. The collected data were compared with the measured data and the calculated value of the average chip thickness. The dependence of the size of the cutting and sliding force on the mean chip thickness was demonstrated. As the thickness of the chip increased, so did the values of the individual forces. The effect of the machined material on the cutting force was quite significant. The internal structure of individual materials mainly influenced the cutting force. The smallest cutting force was measured with MDF and the largest with OSB. The influence of adjustment of the saw blade did not have such a significant effect on the size of the cutting force as the type of material being cut. Comparing all of the discs that had been used, the lowest cutting force measured was, on average, done by the discs with copper rivets. It was also statistically proven to be dependent on the size of the cutting force.
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