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Method and apparatus for controlling the profile of a metal strip during rolling

A metal strip and rolling mill control technology, applied in metal processing equipment, rolling mill control devices, contour control, etc., can solve problems such as lagging measurement results, inaccurate thermal models, and inability to display

Active Publication Date: 2020-08-07
NOVELIS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, models combined with measurements of the flatness and thickness profile of the sheet or plate as it enters or exits a multi-stand mill do not provide sufficient information to allow the mill and its associated control mechanisms to fully compensate the work rolls in real time Thermal curvature
Specifically, thermal models are often inaccurate and may not represent actual mill conditions
Measurements of the flatness and thickness profile of a sheet or plate as it exits a multi-stand rolling mill are too laggy to adjust mill control mechanisms quickly and efficiently in response to changing process and material parameters
Also, in a multi-stand mill, these measurements alone do not indicate which rolling stand needs to be adjusted to achieve the desired thickness profile

Method used

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  • Method and apparatus for controlling the profile of a metal strip during rolling
  • Method and apparatus for controlling the profile of a metal strip during rolling
  • Method and apparatus for controlling the profile of a metal strip during rolling

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Embodiment Construction

[0017] The subject matter of embodiments of the invention is described in detail herein to meet statutory requirements, but this description is not necessarily intended to limit the scope of the claims. The claimed subject matter may be embodied in other ways, may contain different elements or steps, and may be used in conjunction with other present or future technologies. This description should not be interpreted as implying any particular order or arrangement between various steps or elements, unless the order of the various steps or arrangement of elements is explicitly described.

[0018] As used herein, thickness generally refers to a point measurement of the thickness of the metal strip taken perpendicular to the surface of the strip, usually but not necessarily at the centerline of the metal strip. Thickness profile or profile generally refers to the aggregation of thickness measurements made on a specific cross-section of a metal strip perpendicular to the rolling dir...

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Abstract

A rolling mill control system and method involves direct measurement of sheet or plate flatness, thickness profile, position and camber of rolls in the rolling mill using sensors positioned between the rolling mill stands. The feedback loop control system adjusts or adapts the mill control mechanism to control the rolling process.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 305,113, filed March 8, 2016, which is incorporated by reference in its entirety. This application is also related to US Patent Application Serial No. 14 / 203,695, filed March 11, 2014, the entire contents of which are hereby incorporated by reference. technical field [0003] The present application relates to control systems and methods for measuring and controlling the thickness profile and flatness of metal strip in a multi-stand hot rolling mill. Background technique [0004] Hot rolling is a metal forming process in which a thick billet, strip or plate is passed through a pair of rolls to reduce the thickness of the billet, strip or plate. During processing, the rolls of the rolling mill and the sheet or plate passing through the rolls heat up due to the pressure and friction of rolling, deformation of the metal, and / or because the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28B21B37/16
CPCB21B37/16B21B37/28B21B38/02B21B38/04B21B38/10B21B38/12B21B1/22B21B37/74
Inventor M.J.费尔利T.F.斯塔尼斯特里特C.埃波利H.奥尔德L.穆拉德
Owner NOVELIS INC