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Metal Processing I

Course developer

Replaced course

MašZ4028 [GMAS4029] Metal Processing I

Course abstract

The aim of course is to provide set of practical skills of casting and forging in machinery engineering; processing types and products; Welding process and equipment for electrical, gas and pressure welding, technology and materials: theory of material cutting process; metal cutting machinery, equipment, tools and technology.

Learning outcomes and their assessment

1. Knowledge - know the technological processes of metals casting, equipment and tools — Test and laboratory works;
2. Skills - to know the welding processes, equipment, tools and the technical parameters — Test and laboratory works.

3. Competence - doing work independently or working in a group, is able to apply the material acquired in the course theoretically and practically — Test and laboratory works.

Course Content(Calendar)

LECTURES:
1. Production of castings. General information about casting production. Importance of castings in the engineering industry. Production of castings in moulding moulds. Building materials, equipment and technology. The latest types of casting production: shell molding, evaporative-pattern casting, die casting and pressure die casting – 1h;
2. Theoretical Fundamentals of metal forging. Plastic deformation. Blank heating for metal forging. Unwanted effects in heating. Heating temperature interval. Technological processes of metal forging: rolling, stretching and punching. Production of forging. Free forging, work tools, equipment and technology. Metal volume punching and sheet stamping. – 1h;
Test I – Casting and forging – 1h;
3. Metal welding. Basics of welded joints. Welding joints and seams. Possibility of metal welding and its criteria. Various metal welding technology and seams creating peculiarity – 1h;
4. Welding in protective gases. MIG/MAG and TIG process. Impacts and choices of gas. Welding wire. Welding power sources, their external curves. Selection and use of power sources – 1h;
5. Gas welding process. Structure and types of gas flame. Gas welding gas and technology – 1h;
Test II. – Metal welding – 1h;
6. Thermal cutting of metals with plasma. Thermal cutting of metals with a laser beam. Metal soldering, soldering materials and technology – 1h.

LABORATORY WORKS:
1. Forming and casting - 4h;
2. Design and formation of castings - 4h;
3. Forging calculation and forging mode selection - 4h;
4. Technical and economic calculations of manual metal arc welding - 4h;
5. Technical and economic calculations of gas metal arc welding - 4h;

6. Technical and economic calculations of gas welding - 4h.

Requirements for awarding credit points

Test type - test. All tests work, laboratory work must be carried out. Delayed lectures shall not exceed 10% of the total.

Description of the organization and tasks of students’ independent work

Preparation for 2 tests and 6 laboratory works – 28h;
Home work No 1. Describe the types of metal casting (submit an electronic or written version) – 10h;

Home work No 2. Describe the types of metal welding (submit an electronic or written version) – 10h.

Criteria for Evaluating Learning Outcomes

Students who have successfully developed tests and laboratory works for this study course may not write the final test.

Compulsory reading

1. Avotiņš J. Metālapstrāde. Jelgava: LLU. 2009. 400 lpp.
2. Avotiņš J. Konstrukciju materiālu tehnoloģija. 2. daļa. Apstrāde griežot. Jelgava: LLU. 2001. 221 lpp.

3. Avotiņš J. Konstrukciju materiālu tehnoloģija. 1. daļa. Grafo analītiskie darbi metālu karstajā apstrādē. Jelgava: LLU, 2004. 90 lpp.

Further reading

1. Pētersons O., Priednieks J. MIG/MAG metināšana. Rīga: AGA SIA, 2005. 108 lpp.

2. Welding cutting General cataloge. SAF: 2004. 140 p. (Francija, angļu val.)

Periodicals and other sources

1. Journal of Mehanical Engineering Science. ISSN: 0022-2542.

Notes

Obligatory for students of the bachelor of professional higher education program “Agricultural engineering” in full and part studies.