Prethodno priopćenje
Influence of Variable Blank Holding Force and Nonmonotonous Process of Deep Drawing on Formability of Coated Sheets
Srbislav ALEKSANDROVIĆ
; Mašinski fakultet u Kragujevcu, Kragujevac, Srbija
Vlatko MARUŠIĆ
orcid.org/0000-0003-0719-3127
; Strojarski fakultet u Slavonskom Brodu, Sveučilišta J. J. Strossmayera u Osijeku, Slavonski Brod, Hrvatska
Tomislav VUJINOVIĆ
; FAM Jelšingrad, Banja Luka, RS, Bosnia and Herzegovina
Leon MAGLIĆ
; Strojarski fakultet u Slavonskom Brodu, Sveučilište J. J. Strossmayera u Osijeku, Slavonski Brod, Hrvatska
Sažetak
The results of the research of influence of the blank holding force and
nonmonotonous process of deep drawing on the formability of low-carbon
steel sheet with one-side galvanic coating of zinc are presented in this paper.
Identification and influence assessment was done by monitoring: forming
force, the distribution of the principal strains in the sheet plane and their
relationship to the forming limit diagram, changes of thinning strain and
drawing depth as the most significant technological indicator. Based on the
analysis of test results, it was concluded that the blank holding force has a
significant influence in terms of intensified friction in the flange. Also, in
terms of a single-phase monotonous process, the applied type of variable
blank holding force had a beneficial effect on the results of forming. A
nonmonotonous two-phase process with uniaxial tension in the first stage
greatly affects the behaviour of materials. During the first phase, there is
an increase of sheet anisotropy, which affects the formability decrease. The
applied variable holding force shows favourable effects, especially when
friction was increased, but they were not dominant.
Ključne riječi
Coated sheets; Deep drawing; Nonmonotonous forming; Variable blank holding force
Hrčak ID:
56743
URI
Datum izdavanja:
30.4.2010.
Posjeta: 1.554 *