Course detail

Theory of Metal-forming

FSI-HTA-KAcad. year: 2016/2017

Complex engineering solutions of the technological processes of metal-forming are based on the theory of plasticity and theory of metal-forming with systems of computer support. The content of the course starts from selected chapters of the physical essence of plastic strain, formability of metals and alloys, fundamentals of mathematical theory of plasticity, and experimental/analytical methods for the theoretical solution of metal-forming processes. The course provides the basic knowledge of and skills in mathematically describing metal-forming processes while applying the physical, chemical, mechanical and thermodynamic principles of the transition of metallic bodies from elastic into plastic state in the course of their plastic deformation into the required shape. The course also addresses the problem of determining the loading of metal-forming tools and machines, carries out analyses of deformation, establishes critical strain values and offers an introduction to computer-aided modelling of metal-forming processes.

Language of instruction

Czech

Number of ECTS credits

Mode of study

Not applicable.

Guarantor

prof. Ing. Milan Forejt, CSc.

Department

Institute of Manufacturing Technology (ÚST)

Learning outcomes of the course unit

The course offers students the knowledge necessary for simplified mathematical representation of forming processes while applying the physical, chemical, mechanical and thermodynamic principles of metallic bodies changing from the elastic into the plastic state, and when these bodies are plastically deformed into the required shape. Students will learn how to determine the loading of the forming tool or machine, and how to determine the critical values of deformation.

Prerequisites

Successful completion of the course is conditional on the knowledge of applied mathematics and physics, materials science, elasticity, strength, and plasticity, and a grasp of metal-forming technologies.

Co-requisites

Not applicable.

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

Conditions of awarding the course-unit credit: participation in exercises, working out 10 accepted reports concerning individual assignments, using recommended computer support. If this condition is not satisfied, the teacher may in justified cases assign alternative exercise programs. The examination is in public, testing the knowledge of three basic areas of the course, namely 1) the physical essence of plastic deformation and formability of metals and alloys, 2) mathematical theory of plasticity, 3) methods for solving metal-forming processes. The examination is conditional on a written test, with a minimum of 23 out of 40 points being awarded. Oral examination follows a preliminary written preparation answering the drawn complex question with 3 sub-questions concerning the basic areas of the course. The main emphasis is on understanding the method of solution and the ability to apply the known analytical and experimental calculation models.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The main objective of the course is to provide students with the theoretical foundations and methodology necessary for solving metal-forming technologies on the principles of plastic deformation and theory of plasticity. Students will acquire knowledge necessary for a creative and complex engineering solution of the technologies of metal-forming processes.

Specification of controlled education, way of implementation and compensation for absences

Absence from laboratory exercises is compensated for via make-up topics of exercises and consultations.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

ASMI H.C.: Matals Handbook Ninth Edition, Vol.14, Forming and Forging, Metals Park Ohio 44073, 1973
LANGE,K.:Handbook of Metal Forming.1st ed.McGraw-Hill Book Comp., New York, London, Hamburg, 1985. 1236p.ISBN 0-07-036285-8
MIELNIK E.M.: Metalworking Science and Engineering. McGraw-Hill Book Comp., 1991

Recommended reading

FARLÍK A.-ONDRÁČEK E.: Teorie dynamického tváření. SNTL Praha, 1968
FOREJT, M.: Teorie tváření- Návody do cvičení, Sylabus. Studijni opory FSI VUT Brno, 2004
FOREJT M.: Teorie tváření. 2.vydani. CERM Akadem.nakl. Brno, 2004. 168 s. ISBN 80-214-2764-7.
FOREJT, Milan a Miroslav PÍŠKA. Teorie obrábění, tváření a nástroje. Milan Forejt; Design obálky: Ildikó Putzová. 2. vyd. Brno: Akademické nakladatelství CERM, 2008. 226 s. ISBN 80-214-2374-9.

Classification of course in study plans

  • Programme M2I-K Master's

    branch M-STM , 1 year of study, summer semester, compulsory-optional
    branch M-STG , 1 year of study, summer semester, compulsory
    branch M-STG , 1 year of study, summer semester, compulsory

Type of course unit

 

Guided consultation

9 hod., optionally

Teacher / Lecturer

prof. Ing. Milan Forejt, CSc.

Syllabus

1. Physical substance of plastic deformation. Formability of metals and alloys.
2. Resistance to deformation, effect of basic parameters. Deformation work and force.
3. Summary of the fundamentals of mathematical theory of plasticity. Partial theories.
4. Conditions of the appearance of plastic deformation. Analysis of the deformation process.
5. Analytical and analytical-experimental methods for solving metal-forming processes.
6. Upsetting between parallel planes, the Siebel and the Unksov solutions.
7. Forward extrusion, stress and strain analysis.
8. Backward extrusion, solution after Dipper, Sachs and Siebel.
9. Die forging, solution after Tomlen, Gubkin, Gelei and Storozhev
10. Bending of thin bars and wide bands.
11. Deep drawing, stress and strain, calculation after Sachs and Sofman.
12. Method of resistance to deformation. Theory of small elastic-plastic deformations.
13. State of stress in free and closed shear and in precise shearing.

Laboratory exercise

9 hod., compulsory

Teacher / Lecturer

prof. Ing. Milan Forejt, CSc.

Syllabus

1. Problems of the physical substance of plastic deformation, demonstrations, report. 2.Evaluation of the parameters of deformation, deformation rate, report. 3.Calculation of main and effective stress, graphic interpretation, report. 4.Evaluation of resistance to deformation curves obtained from experiments. 5.Calculation of resistance to deformation and forces in upsetting, program vypis.exe, report. 6.Stress and forces in forward extrusion. Program Protlac.exe, report. 7.Stress and forces in backward extrusion. Program protlac.exe, report. 8.Die forging, calculation of forging forces. Program kovani.exe, report. 9.Calculation of bending forces and springing-back, report. 10.Stress, forces and number of drawing operations. Program tazeni.exe, report. 11.Evaluation of stress and strain on a drawn part, report. 12.Stress in current and precise shearing. Program strih.exe, report. 13.Conclusion of exercises, discussion of reports. Course-unit credit.