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.

doc. Ing. Antonín Záděra, Ph.D.

1. Investment casting technology with the use of rapid prototyping methods

   The investment casting technology belongs to the foundry technologies reaching high dimensional and shape accuracy. It uses shell moulds based on colloidal silicates on water or alcohol base. Their production requires controlled conditions of gelation and drying. Modern methods use the RP methods that allow the production of a shell mould in the order of several hours. The work is aimed at optimizing the gelation and drying conditions with regard to properties of ceramic moulds under normal and elevated temperatures. Further on the work is aimed at analysing the phase changes and properties of the shell mould during the process of its drying and ceramising annealing.

   Tutor: Záděra Antonín, doc. Ing., Ph.D.

2. Metal coating of plastic parts produced by 3D printing SLM method (Selective Laser Melting)

   Task of this study will be elaborate proposals and verify procedures to metal coating parts produced by 3D plastic printing and also study of related structural changes that's occur during metal coating. Focus will be especially on materials created by SLM (Selective Laser Melting) method and on possibility of practical application coating on concrete product. Objective of this study will be partly workability research of metal coating to specific products produced by 3D printing, including second practical application, including 3D scanning, 3D visualization, 3D printing with metal post-coating. Usage of those technology for example for renovation or restoration old and worn-looking machine components.

   Tutor: Sedlák Josef, doc. Ing., Ph.D.

3. On the cutting performance enhancements for HIPIMS coating technology

   Cutting tools are indispensable in manufacturing technologies for a long time. Modernization is currently underway, mainly by changing geometry, application of powder metallurgy to the core of the tool and application of hard and abrasion resistant coatings. The aim of the thesis is the modern design of cutting tools for HIPIMS coated method.

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

4. Progressive technologies of five axes machining at machining centres

   Modern technologies of 5-axis machining are very frequently asked machining operations at modern CNC centres. 5-axis machining has been used in aerospace applications for many years but it is only recently that the toolmaking industry has shown similar interest. The main advantage of 5-axis machining is the ability to save time by machining complex shapes in a single set-up. Additional benefit comes from allowing the use of shorter cutters that permit more powerful and more accurate machining.

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

5. Study and Optimization of Process Parameters in 3D Printing by Wire Welding Method

   3D printing of metals in all variants is one of the modern additive manufacturing technologies. One option is to weld the wire, which is not as accurate as the powder coating, but is fast and economically advantageous. The rapid development of these methods is related to the study of the material properties of the formed structures, related to the production process, when repeated heat cycles occur during welding, leading to changes in the material structure and associated mechanical properties. The mechanical properties of the resulting structures are particularly important when using special materials that are sensitive to temperature cycles in the production process. The aim of this work will be feasibility study of concrete products suitable for 3D printing, including practical application of 3D printing of metals by arc welding methods.

   Tutor: Mrňa Libor, doc. RNDr., Ph.D.

6. 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.

7. 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.

8. Tool wear and methods for tap threading performance enhancements.

   Taps keep an irreplaceable position among other tools for threading in manufacturing technologies. Their modernization today gathers improvements of their geometry, powder metallurgy applications for the tool core and applications of hard and wear-resistant coatings. The aim of the work is a modern drill bit for threading of structural steel, especially in hardened state.

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

9. Use of Modern Technologies for the Production Concept of Cutting Tool

   Research and development of the design technology of cutting tool that could be used in practice in conventional machining. The aim of the research is to design technology for the prototype cutting tool, with the support of reverse engineering technology, Rapid Prototyping technology, Rapid Tooling technology and CAD / CAM applications, potentially applied in manufacturing practice after the necessary cuttingability tests connected with force analysis. A significant benefit of this research can be the achievement of a lower economic point of view associated with unlimited possibilities of setting the printing parameters, analyzing the material structures and application of special coatings to the cutting part of the tool.

   Tutor: Sedlák Josef, doc. Ing., Ph.D.