Technology of round bars rolling on a three-high skew rolling mills allows rolling of standard materials such as steel and aluminum, as well as new materials, especially hard deformable materials. The paper presents the results of theoretical and experimental rolling process of aluminum bars with a diameter of 20 mm. As the stock round bars with a diameter of 25 mm made of aluminum grade 1050A ...

This paper deals with some numerical simulation and experimental tests related to forming and springback of a rectangular part manufactured from tailor welded blanks. Final shape of the parts manufactured by tailor welded blanks is seriously affected by springback effect. This paper work is trying to prove out the important role of material rolling direction has on the springback reduction. The...

Aiming at predicting what happens in reality inside mills, the contact parameters of iron ore particles for discrete element method (DEM) simulations should be determined accurately. To allow the irregular shape to be accurately determined, the sphere clump method was employed in modelling the particle shape. The inter-particle contact parameters were systematically altered whilst the contact p...

Spontaneous stratification of granular mixtures has been reported by Makse et al. @Nature ~London! 386, 379 ~1997!# when a mixture of grains differing in size and shape is poured in a quasi-two-dimensional heap. We study this phenomenon using two different approaches. First, we introduce a cellular automaton model that illustrates clearly the physical mechanism; the model displays stratificatio...

Flexible Roll Forming (FRF) allows the forming of components with a variable cross section along length component. However, process has only limited application in automotive industry due to wrinkling flange which currently prevents high strength steels and limits part shape complexity. This paper presents new technology, Incremental Shape Rolling (ISR), where pre-cut blank is clamped between t...