Naslov
Numerical Investigation of Friction Coefficient in Coining Processes of the Same Part in Different Grain Sizes

Autori
Keran, Zdenka ; Math, Miljenko ; Piljek, Petar

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 13th International Scientific Conference on Production Engineering / Abele E., Udiljak T., Ciglar D. - Zagreb : Hrvatska udruga proizvodnog strojarstva (HUPS), 2011, 143-146

ISBN
978-953-7689-01-8

Skup
13th International Scientific Conference on Production Engineering

Mjesto i datum
Biograd na Moru, Hrvatska, 16.06.2011. - 18.06.2011

Vrsta sudjelovanja
Ostalo

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
coining process ; numerical simulation ; friction coefficient

Sažetak
The study concerns the analysis of significant contact friction changes by changing the size of crystal grains in the processes of free axisymmetric workpieces upsetting, initial height of 2 mm. The friction changes result with significant changes in forming force. This phenomenon usually characterizes microforming processes. Using hard experimental data in the creation of numerical FE (finite element) model, a dependence of the changes of contact friction in correlation to the change of the workpiece crystal grain size for three different grain sizes: 39, 47 and 76 μm is presented. It is shown that the friction factor is increased by reducing the size of crystal grains. Physical interpretation of the results is given by theory of Bowden and Tabor.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA