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Application of modern technologies for production of complex shape surfaces
Varhaník, Matúš ; Sadílek, Marek (referee) ; Drbúl,, Mário (referee) ; Sedlák, Josef (advisor)
A set of modern production technologies was applied in the design and production of the individualized femoral component of the total knee endoprosthesis. Before starting the design of the implant itself, the Ti6Al4V material produced by SLM 3D printing technology was tested in terms of tribological contact with the articulation member made of high molecular weight polyethylene. The obtained results confirmed the possibility of using this technology for the production of the semi-finished product of the intended implant. Another series of tests gradually defined the characteristics of the technological-production process in terms of the direction of printing, heat treatment, the method of processing the functional surface and the morphology of the surface. The deposition of coatings using PVD technology was aimed at increasing the functional properties of the implant, such as antibacterial properties, reducing friction and increasing wear resistance. Coatings testing in the categories of topography, adhesion, cohesion, delamination and coefficient of friction successively generated a winner from among the 3 tested coatings (TiN, WZrB, TiCC). The final part of the dissertation frames the acquired knowledge and transfers it to the pre-production and production phase of the creation of the femoral component of the total knee endoprosthesis. During this phase, knowledge from the field of reverse engineering, construction and chip machining technology is applied. The output of the work is an implant, the production of which included the use of a total of 4 reverse engineering software solutions, CAD/CAM support, CNC milling of general surfaces, polishing of the functional part and PVD coating.
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Analysis of the Impact of Technological Processes on the Properties of the Functional Areas of Bearings
Fišerová, Zuzana ; Čep, Robert (referee) ; Sadílek, Marek (referee) ; Kouřil, Karel (referee) ; Chladil, Josef (advisor)
The dissertation is focused on the bearing production technology issues. The aim of the thesis is to investigate and evaluate the influence of the technological processes on properties of the functional surfaces of an outer bearing ring. The development, rolling, grinding and turning have been selected as basic technological processes. The subject of the surface integrity research on test samples is the measurement and analysis of the quality of the machined surfaces and residual stresses in the surface layers of the bearing rings. The comparison is made in relation to the previous operations - rolling, turning and grinding.
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Analysis of the Impact of Technological Processes on the Properties of the Functional Areas of Bearings
Fišerová, Zuzana ; Čep, Robert (referee) ; Sadílek, Marek (referee) ; Kouřil, Karel (referee) ; Chladil, Josef (advisor)
The dissertation is focused on the bearing production technology issues. The aim of the thesis is to investigate and evaluate the influence of the technological processes on properties of the functional surfaces of an outer bearing ring. The development, rolling, grinding and turning have been selected as basic technological processes. The subject of the surface integrity research on test samples is the measurement and analysis of the quality of the machined surfaces and residual stresses in the surface layers of the bearing rings. The comparison is made in relation to the previous operations - rolling, turning and grinding.
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