A method for dynamic stiffness control of hot rolling mill finishing mill stand

A technology of finishing rolling unit and control method, which is applied in the direction of rolling force/roll gap control, etc., can solve the problems affecting the surface quality control of hot-rolled strip, large rolling force of the front stand, and peeling of oxide film on the roll surface.
CN104001735BActive Publication Date: 2016-04-27BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2016-04-27

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Abstract

A hot continuous rolling mill finishing mill group rack dynamic stiffness control method includes: (1) performing control on initial threading rack head stiffness; (2) tracking and calculating actual positions of the head of a band steel; (3) performing primary control which is first time variable stiffness control after threading on rack stiffness; (4) controlling actual positions of the band steel; (5) performing constant stiffness control on the band steel; (6) controlling actual positions of the tail of the band steel; (7) performing rack stiffness control which is second time variable stiffness control of the band steel before steel throwing; (8) performing rack initial stiffness control in the steel throwing stage. The hot continuous rolling mill finishing mill group rack dynamic stiffness control method achieves the purpose of improving quality control of a roll surface of a rack mill roll by controlling related dynamic variable stiffness in the rolling process of the rack, in other words by controlling stiffness of a rolling mill twice according to different positions of the band steel.
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Description

technical field

[0001] The invention belongs to the field of plate shape control in plate and strip rolling, in particular, the invention relates to a dynamic stiffness control method of a finishing rolling unit of a hot continuous rolling mill. Background technique

[0002] Regarding the dynamic load control method of the finishing unit of the hot tandem rolling mill, there are related patented technical descriptions. For example, the Chinese patent application with the application number "200610124802.9" and the title of the invention "A Method for Controlling the Crown of Hot-Rolled Strip Based on Smoothly Varying Rolling Rules" discloses a method for controlling the crown of finished hot-strip steel. The method is aimed at the problem that the roll bending system can not control the crown of the strip during the hot rolling process, and provides a method for controlling the crown of the hot-rolled strip based on a smoothly changing rolling schedule. According to the met...

Claims

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