Keran, Zdenka and Math, Miljenko and Grizelj, Branko (2011) Eksperimentalna i numerička analiza plitkog gravurnog kovanja kao procesa mikrooblikovanja. = Experimental and numerical analysis of coining process using microforming approach. Tehnički vjesnik : znanstveno-stručni časopis tehničkih fakulteta Sveučilišta u Osijeku, 18 (4). pp. 505-510. ISSN 1330-3651. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q4 (2011). .
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Abstract
This study concerns the analysis of significant changes of process parameters in a coining process when dealing with different grain sizes. Area son for these changes can be found if the coining process is understood as a micro forming process. Using that approach a few problems are explained and solved: large elastic spring back, insufficient die filling, significant enlargement of total forming force, changes in friction. An experimental research provided data about percentage of elastic spring back in total high reduction during coining process of Al 99 5 in three grain sizes. An experiment also included microscopic observation of gravure filling. The final result is a correlation between grain sizes and elastic spring back, and also a correlation between grain sizes and gravure filling for different forming forces. Using experimental data in the creation of numerical FE (finite element) model, the dependence of contact friction changes in correlation to the change of the grain size is presented. Physical interpretation of the results is given by the theory of Bowden and Tabor.
| Item Type: | Article (["eprint_fieldopt_article_type_article" not defined]) |
|---|---|
| Keywords (Croatian): | Coining process; Contact friction; Die filling; Elastic springs; Experimental and numerical analysis; Experimental data; Experimental research; Finite Element; Forming forces; Grain size; Microforming; Microscopic observations; Physical interpretation; Process parameters; Filling; Finite element method; Forming; Friction; Microfabrication; Springs (components); Grain size and shape |
| Subjects: | TECHNICAL SCIENCE |
| Divisions: | 1200 Department of Technology > 1220 Chair of Metal Forming |
| Indexed in Web of Science: | Yes |
| Indexed in Current Contents: | No |
| Citations JCR: | 0 (24.4.2015.) |
| Quartiles: | Q4 (2011) |
| Citations SCOPUS: | 0 (24.4.2015.) |
| Date Deposited: | 24 Apr 2015 08:59 |
| Last Modified: | 24 Apr 2015 08:59 |
| URI: | http://repozitorij.fsb.hr/id/eprint/3737 |
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