14 KB298 KB13 KB200020242000Arzenšek, BorisCvahte, PeterFajfar, PeterRodič, Tomažštevilka:3/4letnik:344 stranistr. 173-176ISSN:1580-2949COBISSID:229290URN:URN:NBN:SI:doc-3GWSPVXBslInštitut za kovinske materiale in tehnologijeMateriali in tehnologijealuminijeve zlitinealuminium alloypalicevlečenjeNumerična in eksperimentalna analiza vlečenja aluminijeve zlitine 6262| Numerical and experimental analysis of drawing aluminium 6262 alloy|In this paper experimental and numerical analyses of a combined extrusion and drawing process of rods made from 6262 alloy are presented. The main aim of finite element analyses applied in this work was to optimise the combined extrusion and drawing of rods to obtain 35 mm diameter without applying a pointing process prior to deformation. The experimental investigations including tension tests of the 6262 alloy, measurements of the drawing forces in the industrial conditions, and prediction of the friction coefficient by Burghof. The numerical analyses comprise an analysis of contact between the tool and the workpiece to evaluate the frictional coefficient using an inverse approach, a sensitivity analysis of the process with respect to tool geometry and tribological conditions, as well as optimisation of the tool design fora rods of 35 mm diameter. Extrusion defects such as folding due to upsetting effects is also considered and the upper limits for friction is determinedV članku je obravnavana eksperimentalna in numerična analiza vlečenja in potiskanja palic iz aluminijeve zlitine 6262. Cilj numeričnih analiz z metodo končnih elementov je optimiranje oblike matrice za kombinirano potiskanje/vlečenje palic premera 35 mm, brez predhodnega šiljenja konic palic. Eksperimentalne analize vključujejo preizkuse mehanskih lastnosti zlitine 6262 z nateznimi preizkusi, merjenje sile vlečenja v industrijskih razmerah in določitev koeficienta trenja po Burgdorfu. Numerična analiza obsega določitev trenja med orodjem in preoblikovancem po inverznem postopku, analizo občutljivosti procesa na geometrijo orodja in tribološke pogoje, optimiranje geometrije votlice za palice 35 mm ter analizo nakrčevanja palic med potiskanjem. Z analizo nakrčevanja je določena zgornja meja trenja, ki med procesom potiskanja ne sme biti preseženaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije