Numerical simulation and suppression method of inclined wave defects in strip cold rolling

Abstract

In the strip cold rolling process, the inclined wave defect is an atypical flatness defect that can adversely affect the subsequent coating process. In order to investigate the causes of inclined wave defects, the tension stress distribution in the cold rolling process was investigated by using the method of assuming pre-buckling load distribution and stress boundary conditions in this paper. According to the study, the load distribution that produces the inclined wave defect was obtained, and the load distribution was verified by finite element simulation. The results show that the obtained load distributions are consistent with the conditions for the generation of inclined wave defects. On this basis, the influence laws of several parameters on the inclined wave defects are obtained through rolling test and simulation analysis, and the effective suppression of strip inclined wave defects is achieved.

Numerical Simulation as a Tool for the Study, Development, and Optimization of Rolling Processes: A Review

“…Cold rolling has been investigated in five of the articles included in Table 1. Although thermomechanical complexities do not occur in cold rolling, other challenges, such as the lack of flatness of the rolled products [41] or springback [46], suffered by the materials may occur. The prediction of these phenomena can be a challenge in order to optimize the manufacturing process, which justifies the presence of papers focused on cold rolling.…”

“…Wang et al [41] investigated the causes of an atypical type of defect called inclined wave defects, which appear during cold rolling of strips. For this purpose, numerical simulations were carried out using a 3D elastoplastic FEM model.…”

“…In most of the studies included in Table 3, a transient regime simulation was carried out, whereas in [31,55,56,64] a steady-state simulation was chosen. As far as the type of analysis is concerned, thermomechanical analysis is predominant, with mechanical analysis having been performed in [41,58,59,63]. The programs used are varied, finding studies in which Abaqus, Deform, Forge, Marc, LS-DYNA, and LAM3 have been utilized.…”

Numerical simulation analysis of the rolling process based on the particle swarm hybrid algorithm

“…Dependent on the rolling conditions and products, rolling process can be classified into hot rolling [4,5], cold rolling [6], composite rolling [7], accumulative rolling bonding [8][9][10] and so on. By using assumptions about stress boundary conditions and buckling load distribution, Wang has carried out a regular analysis of the tensile stress distribution during cold rolling [11]. The paper analyses the load distribution that produces ramp-wave defects and verifies the load distribution combined with finite element simulation.…”