Numerical simulation method for rolling process deformation of continuous variable convexity roller of wide and thick plate product

Abstract

The invention discloses a numerical simulation method for deformation in the rolling process of a continuous variable convexity roller of a wide and thick plate product. The numerical simulation method comprises the following steps: obtaining material attribute parameters of the continuous variable convexity roller and a rolled piece; determining geometric parameters of the continuous variable convexity roller and rolled piece; establishing a geometric model of the continuous variable convexity roller and rolled piece by utilizing three-dimensional drawing software; obtaining process parameters of rolled piece rolling forming and continuous variable convexity roller deformation; establishing a three-dimensional thermal coupling finite element analysis model; carrying out simulation analysis of deformation in the rolling process of the continuous variable convexity roller; and verifying the correctness of the three-dimensional thermal coupling finite element model. Accuracy and reliability of the model are guaranteed, elastic deformation of the continuous variable convexity roller and elastic-plastic deformation of a rolled piece are coupled together, and compared with other technologies, in addition, by means of coupling of a temperature field and a stress field, the method better conforms to the actual situation. The method is simple and easy to implement, low in cost, high inprecision and efficiency and capable of replacing a trial-manufacture experiment in practice.

Description

technical field [0001] The invention relates to the field of computer aided engineering, in particular to a numerical simulation method based on the deformation of a continuous variable crown roll rolling process for wide and thick plate products. Background technique [0002] The so-called variable crown rolling mill refers to processing the work rolls into continuous variable crown rolls with S-shaped roll bodies in order to meet the needs of adjusting the crown and shape of hot-strip steel plates. After the upper and lower work rolls are inverted 180 degrees, Through the symmetrical movement of two continuously variable crown rollers in opposite directions, continuously changing roll gaps of different crowns are obtained, which is equivalent to a series of continuously variable crown rollers configured with different crowns. Continuously variable crown rolls not only have a large crown adjustable range, but also can be continuously adjusted, and the shape control range is...

AI Technical Summary

Problems solved by technology

[0004] The existing numerical simulation methods for the rolling deformation of continuously variable crown rolls generally use rigid roll simulation (ignoring the crown and elastic characteristics), and although elastic roll simulation is used, the continuously variable crown rolls are simulated according to Deformation Simulation of Straight Roll Rolling

These two simulation methods can only approximate the deformation of the continuous variable crown roll rolling process, and cannot accurately describe the deformation process of the continuous variable crown roll

The use of rigid rolls is based on the assumption that the continuously variable crown roll does not deform and is used to calculate the change process of force. The use of straight rolls is only to calculate the deformation of the roll and the change process of force, but the continuously variable crown roll itself is not straight. , it is obvious that there is a clear gap between the two calculations

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