1 The steel plate adopts a large reverse bending rate on the second and third rolls, and the rolling amount of each roller after the fourth stick is gradually reduced, so that the rolled piece is straightened faster. When the thickness of the steel plate is less than 20 mm, the inclined straightening process is adopted; when it is larger than 20 mm, the parallel straightening process is adopted.
2 straightening pass and straightening speed optimization. Considering the thin gauge steel plate with fast cooling and low straightening temperature, the fast straightening process is adopted, and the straightening pass is controlled in 3 passes; the steel plate is larger than 16mm, the steel plate temperature is relatively high, and the slow straightening process is adopted, and the straightening pass is generally controlled. For 5 passes. The unevenness is controlled in the range of 1-3 mm.
3 final pass optimization. The middle wave of the original plate type of the steel plate increases the amount of the final pass; the original plate-shaped edge wave of the steel plate reduces the amount of the final pass.
4 Improve the quality of the straightening surface of the steel plate. 1) Straightening the high-strength steel plate, the cooling water on the lower surface of the front straightening machine is closed, the rear straightening machine reduces the cooling water amount to improve the uniformity; 2) the use of the introduction of the straightening guide roller reduces the work of the squat steel plate The influence of the roll surface; 3) Optimization of the replacement time of the straightening rolls and process monitoring during the production process to facilitate the straightening effect.
5 roll gap drift improved. Remove the straightening machine roll gap electromagnetic clutch and use a rigid coupling to completely eliminate the inaccurate roll gap caused by the friction plate slip.