Method for controlling head edge wave of wide thin steel sheet
By pre-setting the bending roll force Fb in the finishing rolling stage to pre-form a negative convexity roll gap in the transverse direction, the problem of edge waviness at the head of wide thin steel plates was solved, and the production of steel plates with high flatness was achieved, thereby improving production efficiency and product competitiveness.
Patent Information
- Application Number
- CN202310940086.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-28
- Publication Date
- 2026-07-03
- Estimated Expiration
- 2043-07-28
AI Technical Summary
In the finishing rolling process of wide thin steel plates, especially at the head, edge waviness often occurs, making it difficult to meet the high standards of end users in terms of flatness. Existing methods are not effective in controlling this at the head.
Before the last loaded pass in the finishing rolling stage, the preset value Fb of the bending roll force is obtained by calculation, so that the transverse loaded roll gap of the roll forms a negative convexity, which counteracts the impact force when the steel plate head bites in and controls the edge waviness of the steel plate head.
It significantly reduces the flatness error of the steel plate head to below 1.2mm/1000mm, meeting the high flatness requirements of end users, shortening the production process and reducing costs.