The development of selective work roll coolant control for improved shape and profile control in hot rolling
Project ID: 7210-EA/816Funded under: ECSC-STEELRES 7C
The initiative for this project was the result of measurements made of work roll thermal expansion during hot rolling. By differential control of cooling across the roll width, it was anticipated that this thermal expansion could be controlled, as a mechanism for influencing the final strip flatness when combined with limited roll bending. Prototype cooling water headers were manufactured which incorporated fast response switching valves, directed by a programmable logic controller. Measurements of strip shape were made by a laser shapemeter and a multi-rotor contact shapemeter. On-line work roll profile measurements were also obtained. Whilst the number of experimental results obtained was limited due to blocked control valves in the experimental roll cooling header, relationships were established between the roll thermal crown and the coolant flow rate and coolant pattern for various strip widths. Two designs of coolant header were evaluated. The more successful was that with a simpler, variable flow control and a larger spray contact on the work roll.
Bibliographic Reference: EUR 13301 EN (1991) 33 pp., FS, ECU 5
ISBN: ISBN 92-826-0519-1
Record Number: 199110543 / Last updated on: 1994-12-02
Original language: en
Available languages: en