The production technology in Ph.D study involves foundry and machining technologies, quality management and metrology, forming technology, welding and surface treatment technologies, inclusive of automation of the preparation of production as well as automation of manufacturing processes employing the above technologies. During their studies the students will get a profound knowledge of applied methematics, physical metalurgy, theory of experiments and optimization of technological processes in particular together with other theoretical and practical information closely related to the chosen field.

prof. Ing. Ladislav Zemčík, CSc.

1. Grinding of Tool Steels

   The dissertation work is focused on some fundamental methods of tool steels grinding , also contains analyses of modern cutting materials and conditions, analyses of the quality of ground surfaces and other technological or economic parameters. In the experimental part, the research work is focused on statistical quantification of the specific grinding variables and surface quality after grinding using mainly the SG abrasive mainly.

   Tutor: Píška Miroslav, prof. Ing., CSc.

2. Hybrid Manufacturing Technologies

   The use of hybrid manufacturing technologies can be a solution if new options for the manufacture of a new product are needed. More complex geometries and new materials of a successor product often demand a change in the manufacturing process chain. During the planning process there are several options to face this problem: single manufacturing processes within the manufacturing process chain can be optimized, tools can be replaced by different ones or the process chain can be extended by an additional process. Hybrid manufacturing technologies often provide a high potential for innovation and a high potential in enhancing manufacturing process capabilities in terms of new product properties and sustainable production.

   Tutor: Píška Miroslav, prof. Ing., CSc.

3. Machining of bonesurfaces for knee implants with multiaxis robot use.

   Increasing evidence suggests performing total knee arthroplasty using computer navigation that can lead to more accurate surgical positioning of implants and knee alignment compared to a conventional operating technique. The use of robotic machining technologies can launch this accuracy one level further because it uses navigation and machining in combination with ultimate mechanical CNC precision, which could eliminate or reduce the inevitable margin of error during mechanical preparation of the bony cuts of total knee arthroplasty by the surgeon. The precision of pre-worked implant positioning and alignment can be expected within the 1° error of neutral alignment in all three planes. A reduction of operating time required for the robotic implantation, the technical complexity of the system, and the extremely high operational costs and better comfort of surgeons are directing the research to advanced machining robotic systems. The main goal of the work is work-out of the advanced CNC algorithms for inversion machining of bone tissues according to the real implant cavities.

   Tutor: Píška Miroslav, prof. Ing., CSc.

4. Optimization of ceramic shell moulds in invesment casting technology

   The optimal ceramic shell mould is in investment casting technology different according to the casting alloy used and also to the casting size and shape. Today there are many binders and ceramic refractory materials available from which the final mould could be made. The final mould structure and composition have direct impact to the final casting quality especially in this technology where not very extensive finishing operations are expected.

   Tutor: Horáček Milan, prof. Ing., CSc.

5. Optimization of wax pattern manufacture from the point of view of maximum final investment casting quality

   The quality of wax pattern is the key factor for manufacturing of perfect casting by the lost wax process. The most important factor to achieve this goal is to optimize the filling of the die cavity by wax. Here there is a possibility to use numerical simulation, nevertheless it is of vital importance to obtain neccessary database first and then also to modify the used software.

   Tutor: Horáček Milan, prof. Ing., CSc.

6. Study of foundry defects in heavy castings

   Research of solidification conditions of heavy steel castings made by secondary metallurgy processes. Influence of solidification conditions on the range of segregation processes and the formation of defects during casting solidification.

   Tutor: Šenberger Jaroslav, doc. Ing., CSc.

7. Study of the efefects of deformation rate and temperature parameeters on formability of Al alloys.

   On selected Al alloys, which are used in the manufacture of components for the chemical, aircraft, and nuclear power industries, the non-uniformities of the distribution of deformations and structural changes shall be assessed, and the effect of increased temperatures and deformation rates on the formability of these alloys shall be evaluated. Constitutive equations for the stress-strain curves will be written as materials models to be used in the calculation models of current software programs

   Tutor: Forejt Milan, prof. Ing., CSc.

8. The limiting strain of carbon steels in cold bulk forming.

   The selected low-carbon steels, which are used for forming the coupling parts volume and machine parts, to assess their plastic and structural changes at high deformations and limit the influence of strain rate. Create a constitutive equation for stress-deformation curves with the limiting conditions limit deformation.

   Tutor: Forejt Milan, prof. Ing., CSc.

9. Utilization of hydroforming technology to create a structured surface of solar panel.

   Solar panel with new design is made up of two laser welded peripherally plates among which flows the heated medium. To increase the efficiency of the solar panel is a appropriate to create a structured surface of the upper plate heat exchanger and provide controlled flow of heated media using meander structure. Both of these requirements can, in large sizes of solar panels, to ensure hydroforming technology in synergy with properly oriented weld on the area of panel. The aim of this work is the application of hydroforming technology mentioned specific case on the basis of theoretical analysis and experimental work to determine the conditions of forming the necessary structures to ensure maximum efficiency of the solar panel.

   Tutor: Forejt Milan, prof. Ing., CSc.