Original title in Czech: Strojírenská technologieFSIAbbreviation: D-STGAcad. year: 2020/2021
Programme: Manufacturing Technology
Length of Study: 4 years
Accredited from: 1.1.1999Accredited until: 31.12.2024
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.
Issued topics of Doctoral Study Program
- Effect of progressive production technology on fatigue performance of tube stabilizer
Description of the topic The scope of the doctoral thesis is to understand the influence of new progressive production technology (forming, bending, finishing methods) with extreme deformation rate (0.1 ° / s) of dimensionally stronger cross sections of stainless steel (eg. 26MnB5) tubular semi-finished product ia analysis of surface integrity, cyclic plasticity, mechanisms of fatigue crack initiation and fatigue life curves, which will be studied with respect to the depth profile of residual compressive stresses after surface balling. Details of the microstructure of changes in heat-treated steel will be investigated both by the electron microscopy technique SEM-EBSD-EDX and by modern STEM and micro-diffraction. Material and technical support: FME and IMT have sufficient technical background to study the issue. A contract on contractual research and development will be concluded with this an industrial partner, which will give the student access to the manufacturer of stabilizers, provision of experimental material, production technology, laboratory observations and fatigue tests will be provided directly at the manufacturer or some workplaces in abroad, measurement of depth residual compressive stresses. Modern experimental techniques such as i-STRESS using FIB-SEM, STEM with precession diffraction will be provided by external cooperation with the company TESCAN Brno and the academic workplace of the Institute of Physics of the Academy of Science CZ in Brno. Professional literature, management, exams, publications and the entire scientific background will be provided by the supervisor together with a specialist supervisor. Expected benefits The scientific contribution is in the detailed phenomenological description of cyclic plasticity using statistical theory of hysteresis loop, in the field of low-cycle fatigue on preformed tubular steel samples, knowledge of fatigue crack initiation mechanism from the point of view of modern depth profiles of residual compressive stresses using FIB-SEM technique . Everything will be published at international conferences and in professional impact journals. From the point of view of the stabilizer manufacturer, it is primarily an efficient / economical production while ensuring the best fatigue properties of the product, enabling better competitiveness on the market.
- Design of methodology and tests of utility properties of axial cutting tools
The aim of the research is to design the methodology of cutting tests of innovative cutting tools, their implementation and analysis of the process, which will be focused on determining the defined properties according to the machining operations. The research will cover the evaluation of cutting tools wear, analysis of surface finish and other accessible parameters that will be the basis for the choice of practical applications.
- Development of ceramic shells for rapid prototyping methods
The development of methods for rapid prototyping of castings has recently received great attention. Possibilities of using 3D printing methods have started new so-called “hybrid technologies”, which combine the advantages of rapid production of patterns and related standard methods of casting production. It is expected to deliver a casting prototype at the highest quality and in the shortest possible time while maintaining the complexity of the required part. The technology of precise casting into ceramic shells is a very suitable technology following the above-mentioned methods of additive production of models, however, the present ceramic suspensions are primarily intended for the conditions of mass production and are not selected and optimized for wrapping specific printed materials and minimum drying time. The current water-based systems can be innovated by using specific additives based on polymers or nylon fibres, which can significantly improve the mechanical and technological properties of the manufactured shells. More detailed information on the composition of individual suspensions, their suitability for rapid prototyping and optimal drying processes are not more or less available and mastering the topic requires deeper knowledge.
- Development of motorcycle chassis made of composites
In recent years a trend in all industry sectors is to reducing the weight and effective use of resources. There is direct influence of the weight on vehicle dynamics and fuel consumption in transportation. Thanks to this, the use of composites significantly grows as they have great mechanical properties to weight ratio. The aim of this dissertation is creation of motorcycle frame structure from composite materials, designing complete manufacturing and technological process, mechanical testing and the design check with respect to vehicle dynamics and safety. The 3D model will be made using CAD/CAM software, alongside with simulation tools for analysis of critical spots. Based on mechanical properties from measurements will be created a composite layup mainly with carbon fiber prepreg. The component will be tested with static loading and also dynamically during the drive. Data will be acquired using optical measurement methods.
- 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.
- Modern technology of advanced implant production and its insertion
Modern technologies of advanced implant production and its insertion, consisting of optimization of digital processing of visualized bone joints, advanced production technologies (especially additive and machining), evaluation of structural, mechanical and other technical properties and methods of their insertion and fixation.
- 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.
- 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.
- Study of mechanical properties of material produced by wire arc additive manufacturing
3D metal printing is effective tool for prototype production of every branch of engineering, as a replacement for existing technologies of production or renovation of tools, jigs and products. The problem is the current ignorance of the structure and mechanical properties of such processed materials. The aim of the disertation will be to study the mechanical properties of selected material nproduced by 3D wire printing, both under static and dynamic loading conditions. Furthemore the study of influence of process parameters of 3D printing on the resulting mechanical properties.
- Tool wear and methods for enhancing of circular saws cutting performance.
Circular saws have long been an indispensable cutting tool with a stable position in basic production technologies. At present, they are modernized mainly by changing geometry, application of powder metallurgy for the cutting part of the tool, in heat treatment and application of hard and abrasion resistant coatings. The aim of this work is to design a modern cutting tool for cutting structural steels by machine cutting.
- Tool wear and methods for enhancing of hand saws cutting performance.
Hand saws have long been an indispensable cutting tool with a stable position in basic production technologies. At present, they are modernized mainly by changing geometry, application of powder metallurgy for the cutting part of the tool, in heat treatment and application of hard and abrasion resistant coatings. The aim of this work is to design a modern cutting tool for cutting structural steels by hand cutting.
- 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.
- 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.
- Vacuum metallurgy of high entropy alloys
High entropy alloys have a great potential for their use in components working at high temperatures. By choosing the appropriate alloying elements and their concentrations, we can obtain a stable structure at both normal and higher temperatures. Melting in vacuum furnaces or powder metallurgy is often used for the manufacture of these alloys. The aim of the dissertation thesis is the development of vacuum metallurgy of high entropic alloys on vacuum induction furnaces. The paper will study the kinetics of melting metals and gasses in the melt in vacuum, element evaporation in vacuum or their interaction with refractories.
Course structure diagram with ECTS credits
Study plan wasn't generated yet for this year.