A method for configuring the crown of work rolls in a hot tandem mill

Abstract

A method for configuring the crown of work rolls in a hot continuous rolling mill, through the proportional crown C of the hot strip steel i , to calculate the shape genetic coefficient η of the i-th stand of the finishing mill i According to the above-mentioned results, calculate the crown configuration method of the work rolls of the rolling mill, the method includes: according to the rough rolling process parameters, calculate the entrance strip proportional crown C of the F1 stand of the finishing rolling group 0 ;According to the requirements of the crown of the strip product, calculate and obtain the target proportional crown C of the exit strip of the final stand F7 of the finishing mill 7 ; According to the good shape criterion, determine the mechanical crown C of the work roll of the i-th stand of the finish-rolling group at the exit of the i-th stand of the finishing-rolling group mi ;Calculate and obtain the crown C on the work roll of the i-th stand of the finishing mill Rolli . The invention solves the problem that the factors based on the configuration method of the work roll crown of each stand of the finishing rolling unit do not consider the influence of different working conditions on the shape quality, realizes the improvement of the control ability of the shape quality, and improves the rolling efficiency. Stability, thereby ensuring the product quality of the strip.

Description

technical field [0001] The invention relates to a crown configuration method for work rolls of a hot continuous rolling mill, belonging to the technical field of steel rolling. Background technique [0002] The cross-sectional shape of the strip product is one of the main technical indicators that determine the quality of the strip. The cross-sectional shape of the rough rolling (finish rolling) exit ultimately depends on the actual situation of the roll gap between the two work rolls. The roll gap between the two work rolls plays a decisive role. In order to achieve high-precision strip shape, it is necessary to reasonably configure the crown of the work rolls. However, for a long time, the setting of the crown of the work rolls is mostly determined by field experiments on the strip steel, and there is no clear design criterion and basis . In the hot finishing mill using the traditional flatness control strategy, it mainly considers the thermal deformation and wear of the...

AI Technical Summary

Problems solved by technology

In order to achieve high-precision strip shape, it is necessary to reasonably configure the crown of the work rolls. However, for a long time, the setting of the crown of the work rolls is mostly determined by field experiments on the strip steel, and there is no clear design criterion and basis

In the hot finishing mill using the traditional flatness control strategy, it mainly considers the thermal deformation and wear of the rolls to adjust the rolling rhythm; the design of the crown of the upstream stand of the finishing mill is not carried out. The judgment of the conditions and the consideration of the influence of various external factors, and the influence of the potential bad shape of the upstream stand of the finishing rolling group, made the configuration of the crown of each work roll of the finishing rolling group unable to meet the requirements of the work rolls of the entire group. The control of the shape will lead to the bad shape of the strip steel products, which will affect the product quality

Chinese patent document 1 (a method for arranging the roll profile of a hot continuous rolling finishing mill for wide strip steel), document 2 (a work roll profile and its control method) and document 3 (a roll profile configuration method for a hot continuous rolling finishing mill) method), the above three documents all provide the design method of CVC work rolls, but do not give the configuration method of CVC work roll crown under different working conditions

As a result, the control ability of the crown of each work roll of the finishing rolling unit to the quality of the strip cannot meet the requirements

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