Course detail
Selected Chapters of Metal-forming
FSI-HVT Acad. year: 2021/2022 Summer semester
The course provides information from the areas of strength design and dimensioning of metal-forming tools. The second part includes the theory and technology of metal-forming by high strain rates and energies. This specialized instruction with practical demonstrations includes, among other things, combined reforging, impact indentation, bulk renovation of machine parts and tools, high-rate die forging, explosive, electrohydraulic and electromagnetic metal forming. Also dealt with are cavity shooting, application of explosion energy, dynamic compacting of metallic and non-metallic powders. Modelling of high strain-rate processes is demonstrated. In the third part, students are confronted with the latest results of research.
Supervisor
Department
Learning outcomes of the course unit
Students majoring in metal forming will have an overview of the methods and selected calculation models for dimensioning metal-forming tools. They will be made familiar with the theory and technologies of high strain-rate metal-forming methods, as well as with the latest knowledge in the field.
Prerequisites
Successful completion of the course is conditional on the knowledge of applied mathematics and physics, materials science, elasticity, strength, plasticity, and examination of the subject the theory of metal-forming.
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Teaching is suplemented by practical laboratory work.
Assesment methods and criteria linked to learning outcomes
The course-unit credit is awarded on condition of having attended all laboratory exercises and worked out partial written programs.
The exam has a written and an oral part, based on a set of lot-drawn questions.
Language of instruction
Czech
Aims
The objective of the course is to provide the students with the necessary knowledge and information from the field of metal forming that they could not acquire in the course of studying special subjects so far.
Specification of controlled education, way of implementation and compensation for absences
Attendance in lectures is recommended.
Attendance in exercises is compulsory.
The attendance to the seminar is regularly checked and the participation in the lesson is recorded.
Absence from laboratory exercises is compensated for via make-up topics of exercises and consultations.
The study programmes with the given course
Programme N-STG-P: Manufacturing Technology, Master's
branch STG: Manufacturing Technology, 4 credits, compulsory-optional
Type of course unit
Lecture
26 hours, optionally
Teacher / Lecturer
Syllabus
1.Limit states of forming processes, limit diagrams of plastic deformation.
2.Limit states of stress, conditions of free and minimum security.
3.Analysis of damage to metal forming tools, problems of durability, service life and reliability.
4.Analytical procedures in strength design of forming tools.
5.Approximate stress-strain curves in the calculation models.
6.Application of the FEM in analysis of large plastic deformation.
7.Application of the FEM in the analysis of stress and deformation tools.
8.Theory and technology of metal forming in conditions of real strain rates.
9.Significant factors of high-speed deformation, define of relations.
10.Influence of strain-rate to the deformation resistance, the critical impact speed.
11.Evaluation of dynamic mechanical properties under impact – Taylor Anvil Test-TAT.
12.Evaluation of dynamic mechanical properties of materials by the Split Hopkinson Pressure Bar Test-SHPBT.
13.Review of forming methods using high-speed deformation.
Laboratory exercise
26 hours, compulsory
Teacher / Lecturer
Syllabus
1.Limit states of stress during upsetting and extrusion, conditions of free and minimum security. 2. and 3.Procedure in dimensioning complex dies by the MPIN method. 4.and 5.Solving the contact problem by the FEM program, punch and die application, comparison with conventional solution. 6.Simulation of the forming process in real viscoplastic conditions, demonstration on FORM2D. 7.Evaluation of mechanical properties at high strain rates. 8.Determining mechanical properties by the method of Hopkinson bar. 9.Evaluation of dynamic mechanical properties under impact, using the Taylor Anvil Test. 10.Structural analyses of experimental specimens and real products, explosion forming. 11.Simulation of metal-forming processes in conditions of high strain-rates. 12.Calculation of the dependence of stress function on deformation, temperature and strain rate. 13.Conclusion of exercises, discussion of reports. Course-unit credit.