Accuracy of model force prediction in closed die coining process

Keran, Zdenka and Kondić, Živko and Piljek, Petar and Runje, Biserka (2018) Accuracy of model force prediction in closed die coining process. = Accuracy of model force prediction in closed die coining process. Strojniški Vestnik/Journal of Mechanical Engineering, 64 (4). pp. 225-232. ISSN 0039-2480. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q4 (2016). Točan broj autora: 4.

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Abstract

In micro-forming processes, such as coining, the microstructure of the material and dimension scale of the coined geometry can have a substantial influence on the mechanism of material deformation. The influence of the grain size on the coining force and closed die filling is investigated experimentally, and a mathematical model for result prediction has been created according to the obtained experimental results. The material of the billet is 99.5 % aluminium, and the die geometry is relatively complex. The presented mathematical model takes into account the influence of size effect on the material flow curve through die cavity geometry and estimates the final coining force and corresponding associated displacement of the tool. This enables a controlled influence of the grain size of the specimen material on forming force and tool displacement in the coining process and a reliable prediction of the final coining force and related tool displacement associated with a completely filled die cavity. To determine the accuracy of model force prediction, the experimental and modelled data were statistically analysed and graphically presented.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): micro-forming; coining; mathematical modelling; forging force
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 1200 Department of Technology > 1220 Chair of Metal Forming
800 Department of Quality > 810 Chair of Precise Measurement and Quality
Indexed in Web of Science: No
Indexed in Current Contents: No
Quartiles: Q4 (2016)
Date Deposited: 16 May 2018 09:40
Last Modified: 16 May 2018 09:40
URI: http://repozitorij.fsb.hr/id/eprint/8587

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