An integrated FE process model for precision analysis of thermo-mechanical behaviors of rolls and strip in hot strip rolling

Current Trends in Cross Wedge Rolling for Part Forming

“…Nowadays, many research reports on the wire-rod rolling have taken up. [58][59][60] However, few the researches about the CWR simulation are discussed because of the complex process from the specialized die design, the numerical abstraction of the actual rolling, the deforming feasibility to products quality and capability.…”

The temperature and stress fields developing in rolls during hot rolling

“…These calculations do not explicitly show, however, any characteristic properties of the analytic solution such as the dependence of T max on Pe, q and δ. With respect to numerical solutions it is referred to the papers by Sun and coworkers [19,21], reporting also a rather comprehensive list of material and process data, the studies by Chang [27,28] and the paper by Narita et al [29], dealing not only with a single but also with several hundreds of overrollings. One of the advantages of the numerical solution technique is that the temperature field in the rolling slab can be calculated, too, see e.g.…”

“…One of the advantages of the numerical solution technique is that the temperature field in the rolling slab can be calculated, too, see e.g. the papers by Sun and coworkers [19][20][21] or the papers by Serajzadeh and coworkers [30,31] applying the temperature field to metalphysical predictions of the microstructure of the slab. However, several authors report on significant computational efforts to model the problem with standard structural mechanics software, see e.g.…”

“…The analytical approach was compared with finite element results by Sun and coworkers [20,21]. The numerically calculated temperature field deviates from the analytical solution by less than 10%.…”

“…There, the value of h c is reported to depend in a non-linear manner on the difference T − T c between the actual temperature of the roll and the temperature of the cooling medium [18]. Therefore, using a single number for h c is questionable (as done in [17,[19][20][21]). To overcome these problems a constant heat extraction rateṗ in the cooling interval α + β ≤ ϕ ≤ α + β + γ is assumed in the following analyses.ṗ is selected so, that T c is reached at the end of the cooling interval.…”