A method for adjusting the shape of rolled thickened plate

Abstract

The invention relates to a rolled variable thickness plate shape adjusting method. The method comprises the steps of (1) setting the roll gap, the roll force, the roll bending force and the front-backtension of a variable thickness section; (2) setting the roll bending force of a transition section, wherein the roll bending force of the transition section is a function of the roll bending force of the variable thickness section; (3) conducting variable thickness rolling and detecting the actual rolling force of the variable thickness section in real time; (4) correcting the roll bending forceof the variable thickness section if there is a deviation between the actual rolling force and the set rolling force; (5) resetting the roll bending force of the transition section according to the corrected roll bending force of the transition section; and (6) rolling a conveyed plate into a target plate shape according to the corrected roll bending force. The roll bending force of a rolling mill is changed in advance according to the rolling reduction of a strip material to achieve the good plate shape of the variable thickness section and the transition section at an outlet. The technicalproblems that the good plate shape of the whole roll of the strip material cannot be guaranteed due to the fact that the plate shape at the roll gap outlet cannot be measured in time and the plate shape at the outlet cannot be controlled in real time are solved.

Description

technical field [0001] The invention relates to the field of thickened plate rolling, in particular to a shape adjustment method for rolling thickened plate. Background technique [0002] In order to achieve the goal of lightweighting the automobile, the automobile industry is currently promoting the use of a strip with a continuously changing thickness obtained through rolling - variable thickness plate ( Variable-thickness Rolled Blanks), variable-thickness plate According to the user's weight reduction requirements, the thickness difference between the thick area and the thin area of ​​a variable-thickness plate can reach a maximum of 50%. The profile of the thickened plate includes n+1 equal thickness sections and n transition sections. [0003] Conventional rolling requires that the strip at the exit of the roll gap has a uniform thickness in the longitudinal direction. During the rolling process, the control system will calculate the bending force based on the measur...

AI Technical Summary

Problems solved by technology

To solve the existing shape adjustment method, because the shape of the roll gap exit cannot be measured in time, and the exit shape cannot be controlled in real time, resulting in the technical problem that it is impossible to ensure that the entire roll of strip has a good shape

Images