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.

1. Analysis of Specific Cutting Forces for New Materials and CNC Machining

   Theoretical models for machining are simplified frequently and many times these calculations are followed by over-dimensioning of the main machine parts. That results in higher consumption of electric energy, price of machine, higher needs of cooling and lubricating means. The basic calculation is simple and analogical to the limit strength of materials. The calculations of real chip cross-sections (general trochoids, un-developable surfaces) are included in a limited numbers of works. That time is typical for measurement by analogical devices with high reading error for local extremes, so the tables include unusable data, especially for hardened steels, composite materials, HSC technologies, etc. New knowledge will contribute moreover to modern machine part description, optimisation of support unit regulations, mathematical analyses of real chip cross-sections as function of real support feeds, its speeds, accelerations, etc.

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

2. Control of solidification of superalloys

   Study of solidification of castings from suparalloys in conditions of the mechanical oscillation action.

   Tutor: Zemčík Ladislav, prof. Ing., CSc.

3. Criterion Analysis of Knife-edge Cutting and Shaping Tools

   Utilization of producing methods, where are used different kinds of composed knife-edge cutting tools is important mainly in the area of cutting and shearing or shaping operations, make in particular on low-strength sort of basic materials. However, producing of these tools (ply die-cut patterns) and the conditions of their using are in generally characterized by a lot of specific features. Very important thing for their using in forming technology is the knowledge about how to choose appropriate kind of knives material, how to design the cutting tool, how to clamp the knives into punch plates etc. Determination of these parameters and important rules for designing and producing of these very specific kinds of forming tools is the main target of this Ph.D.work.

   Tutor: Rumíšek Pavel, doc. Ing., CSc.

4. Development of new methods and expert systems of layout planning

   On the fundament of activities model work up inventory of exist methods and on unconcealed area work up new automatzed methods and expert systems.

   Tutor: Hlavenka Bohumil, prof. Ing., CSc.

5. Development of pouring technology of middle weight castings into the cement moulds.

   Selection of sortiment of gray and nodular castings. Proposition of optimal feeding system, the use feeder etc. Preparation of milling and moulding to the cement sands. Technical-economic evaluation of new technology with technology furane sands, including quality of castings.

   Tutor: Rusín Karel, prof. Ing., DrSc.

6. Effective machining of advanced ceramics

   New advanced ceramic materials are used more and more at the present, namely at structural applications, like solid details or thin coatings. The development of structural applications requires the same innovation rate for machining methods of these materials. The aim of this doctoral work is creation of a scientific and technical information system for effective grinding of Al2O3, SiMgO3, SiC, SSiC, SiSiC and eventually Si3N4 ceramics by the help of diamond grinding wheels with brass and resin bond. There will be investigate and solve the problems of cutting forces, tool wear, procedural liquids, thermal phenomena, specific energy and surface quality of machined surface, the all at connection with grinding work conditions, at this Ph.D. work.

   Tutor: Humár Anton, doc. Ing., CSc.

7. Evaluation of Technological Formability of Skin-Treated Sheets

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   Tutor: Rumíšek Pavel, doc. Ing., CSc.

8. New Milling HSS Cutters for Roughing Operations

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

9. Optimisation of implant insertion technology

   Recently, many research works (WASSENAAR, E.B., FRANSSEN, B.B.G.M., VAN EGMOND, D. B SCHUURMAN, F. and KON, M.) are dealing with an idea of hammering of so-called Kirschner wires instead of standard way of drilling. Despite the fact that our research workplace has wide and positive experience with drilling (high precision of aiming, roundness and cylindricity of the hole as supportive place, absence of the radial cracks, no extensive research to the hammering has been verified and evaluated. Looking to the frequent use of the K-wires in surgery and orthopaedics that topic is highly interesting to study.

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

10. Optimization of Deep Drawing Technological Process

    The work targets firstly on the measuring of parameters which are used as enter data when modeling technological process of deep drawing and secondly on determination of reliability of their valuation. The next part of the work is devoted to understanding how the changes of the enter parameters influence the results of the simulation. The results of simulations will be compared with experimental values and as the final result will be a practical recommendations for using of studied enter parameters in computer simulation of deep drawing technological process together with the evaluation of values reliability.

    Tutor: Rumíšek Pavel, doc. Ing., CSc.

11. Progressive technologies of four-axis machining at two-spindle CNC machining centres

    Modern technologies of 4-axis continuous machining are very frequently asked operations at double spindle CNC machining centres. These operations belong to the most complicated regarding structures of the programmes, tool selection and quality assessment. 4-axis machining is used in manufacturing industry for many years, but its significance is rapidly growing for production of rotational parts in one rmachining routine. Main advantage of 4-axis machining is the ability to save production time with machining of complex shapes with a single fastening and automatic re-holding. Other advantages can be an use of driven tools (drills, milling cutters, grinding tools) that allows an powerful machining with high quality of machined surface.

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

12. Secondary oxidization of ferrous alloys when casting heavy casti

    The work focuses on the study of metallurgical processes taking place during the pouring and solidification of castings made of ferrous alloys, using experimental methods.

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

13. Study of foundry defects in heavy castings

    In heavy castings, particularly in steel ones, the defects occur that are connected with low cooling rate and reoxidation processes. The work should be aimed at classification of forming defects, determination of main factors influencing the defects formation, and the study of causes and mechanisms of these defects formation.

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

14. Study of the efefects of deformation rate and temperature parameters on formability of two-phase bake-hardening steels.

    On selected dual-phase bake-hardening steels, which are used in the manufacture of automobile components, 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 evaluated. Constitutive equations for the stress-strain curves shall be written as materials models to be used in the calculation models of current software programs.

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

15. Study of the efefects of deformation rate and temperature parameeters on formability of Ni superalloys

    On selected Ni superalloys, 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.

16. Suggestion of measures for decreasing the extent of defects in heavy castings

    In heavy castings, particularly in steel ones, the defects occur that are connected with low cooling rate and reoxidation processes. The work should be aimed at study of connexion of the defects formation with used technology of liquid steel production and a foundry technology. The work target is to suggest technological treatments resulting in reduction of defects.

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

17. testing of cutting tools for multi-axis machimnig at machining centres

    Modern technologies of multiaxis machining are very frequently asked machining operations at modern CNC centres. Multiaxis 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 multiaxis 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.This sort of machining needs more resistant cutting tools working in heavy conditions of loading. Significant help can be use of super-fine substrate materials, very hard and wear resistant coatings based on nano-crystalline structures and intensive cooling. The aim of the work will be speciafication of the new technologies, applied material research of coating technologies for this kind of machining and optimisation of process fluids.

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

18. 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.

19. Using of RP techniques and lost wax technology for medical castings

    For substitution of knee and hip joints it is possible also to use a combination of rapid prototyping technology FDM (available at the Institute of manufacturing) in combination with the technology of lost wax pattern. Very important factor in replacing of these human body parts is their quick manufacturing "fit on purpose", i.e. with exact dimensions of the parts suitable for the person in need. The main objective of this topic should be the optimizing of the manufacturing parameters when producing the wax pattern of the part.

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