Variable convexity working roll for rolling plates, sheets and strips

Abstract

The invention provides a variable convexity working roll for rolling plates, sheets and strips, and a roll shape curve thereof adopts a composite function. The special roll shape curve form of the working roll can balance the secondary convexity control capability of wide and narrow strip steel at the same time of ensuring the secondary convexity regulation capability of no-load roll gap and the shift amount of a rolling roll to show an approximate linear relationship. Compared with the continuous variable convexity roll shape technology, the variable convexity working roll improves the control capability to the narrow strip steel under the situation of also having stronger convexity control capability to the strip steel with wide specification; in addition, the variable convexity workingroll further has the control function to high-order wave shape, thereby enhancing the whole plate shape control capability of a rolling machine and meeting the technical requirements on high-precisionrolling of plates, sheets and strips.

Description

technical field [0001] The invention relates to a work roll profile used for strip shape control in strip steel production, especially a variable-convexity work roll profile that balances the crown control ability of wide and narrow strip steel, and belongs to the strip shape in the field of strip rolling Roll shape design in control technology. Background technique [0002] At present, the variable crown roll shape widely used in the field of shape control includes: continuous variable crown roll shape CVC and SmartCrown roll shape. [0003] (1) Continuously variable crown roll CVC [0004] At the end of the 1970s, the German SMS company (SMS) took the lead in developing the continuously variable crown (CVC) roll shape. After nearly 30 years of research and development, the CVC roll shape has become the most important plate in the field of strip rolling. One of the means of form control. This technology can continuously change the crown of the unloaded roll gap through t...

AI Technical Summary

Problems solved by technology

However, the roll shape also has obvious disadvantages:

[0025] This means that when rolling a relatively narrow strip steel, the crown adjustment ability drops rapidly, and the crown control effect cannot be well exerted

For wide-band steel and ultra-wide-band steel rolling mills, this problem is particularly prominent. In the production process, it is manifested that the rolls often move to the limit position when rolling narrow strip steel, showing obvious lack of crown control ability.

[0026] 2) The unloaded roll gap does not have the ability to control the high-order crown, which means that the roll shape can only realize the control of the secondary crown, and it is powerless to deal with the high-order shape defects that appear in the rolling process of wide and thin strips

[0040] In a word, the existing continuously variable crown shape control technology cannot well solve the drawback that the secondary crown control ability drops sharply with the reduction of the strip width. This invention is based on this problem and proposes a new work Roll shape

Images