Universal roll crossing system
AssigneesDanieli Technology, Inc., International Rolling Mill Consultants, Inc.
InventorVladimir B. Ginzburg
Life of this patent
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Abstract
A method for hot rolling and cold rolling metal strip to a finish strip thickness, profile and flatness in a series of rolling mills each having roll bending and roll crossing capabilities to effect a plurality of roll gap profiles. A control method utilizing mathematical models of the roll gap profiles and strip profile is used to select and set the roll bending and roll crossing to a preferred configuration based on secondary effects of possible combinations so as to produce finished metal strip having desired thickness, profile and flatness characteristics.
Claims13
In a rolling mill system for rolling metal strip to a predetermined profile, thickness and flatness, a series of roll stands each supporting at least a pair of work rolls for engaging metal strip passing therebetween and a pair of back-up rolls, and means for configuring each roll including bending means and roll-crossing means, the improvement comprising:
- a. means for continuously sensing thickness and flatness of the metal strip prior to engagement with the work rolls and generating signals indicative of the thickness and flatness;
- and
- b. control means for:
- i) storing data indicative of the predetermined strip profile, thickness and flatness,
- ii) storing data indicative of strip profiles achievable by the roll configuring means,
- iii) storing data indicative of secondary effects of roll configurations,
- iv) receiving the signals from the sensing means,
- v) determining strip profile from the sensing means' signals
- vi) generating information indicative of all the roll configurations available to achieve the predetermined profile, thickness and flatness,
- vii) determining a preferred configuration of the rolls based on secondary effects,
- viii) generating control signals indicative of the preferred configuration, and
- ix) sending the control signals to the means for configuring each roll.
A method for rolling metal strip to a predetermined profile, thickness and flatness in a series of roll stands each supporting at least a pair of work rolls for engaging metal strip passing therebetween and a pair of back-up rolls, means for configuring each roll including bending means and roll crossing means, and means for continually sensing thickness and flatness of the metal strip prior to engagement with the work rolls and generating signals indicative of said thickness and flatness, comprising,
- providing control means, and with continuous use of the control means while rolling a metal strip
- a. storing information indicative of the predetermined thickness, profile and flatness,
- b. storing information indicative of strip profiles achievable by the roll configuring means,
- c. storing information indicative of secondary effects caused by the roll configuration,
- d. receiving the signals from the sensing means,
- e. determining strip profile from the sensing means' signals,
- f. determining the roll configurations available for achieving the predetermined thickness, profile and flatness by using information from a, b, d, and e
- g. determining the preferred roll configuration for achieving the predetermined profile, thickness and flatness with use of information from c and e,
- h. generating control signals indicative of the preferred roll configuration,
- i. sending the control signals to the configuring means, and
- j. configuring the rolls in accordance with the control signals.
Dependencies are inferred from the claim text.