Plate overlapping straightening process for waved surfaces on two sides of ultra-thin middle-thick plate

Abstract

The invention discloses a plate overlapping straightening process for waved surfaces on two sides of an ultra-thin middle-thick plate. An I-shaped lining plate is overlapped on the plate to be straightened so as to be straightened together with the plate to be straightened. Tension is generated in the middle area in the width direction of the steel plate in the straightening process. The elastic deformation amount of a middle thick layer of the middle area in the width direction of the steel plate is increased. The waved surfaces on the two sides of the ultra-thin middle-thick plate are effectively straightened. The plate overlapping straightening process includes the steps that the lining plate is manufactured, and the I-shaped liming plate is aligned with the plate to be straightened; a first time of straightening is carried out, and the plastic deformation amount is 80%; a second time of straightening is carried out, and the plastic deformation amount is 80%. According to the plate overlapping straightening process, the -shaped lining plate is overlapped on the plate to be straightened so as to be straightened together with the plate to be straightened, tension is generated in the middle area in the width direction of the steel plate in the straightening process, and the elastic deformation amount of a middle thick layer of the middle area in the width direction of the steel plate is increased. Finally, the waved surfaces on the two sides of the ultra-thin middle-thick plate are effectively straightened.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a laminated plate straightening process with double-sided corrugations of extremely thin and medium-thick plates. Background technique [0002] In order to meet the lightweight design needs of downstream users of steel, medium and heavy plate manufacturers have continuously developed thinner steel plates through technological innovation. Limited by the mechanical equipment and automation control capabilities of the rolling mill, it is difficult to precisely control the convexity of the steel plate as the thickness of the rolled piece decreases, and double-sided waves often appear during the rolling process (such as figure 1 As shown), the shape of this type of curved plate mainly depends on the subsequent cold straightening process for improvement. [0003] If the curved plate cannot be straightened effectively by using flat rollers, it usually uses bending roller compensation to caus...

AI Technical Summary

Problems solved by technology

Larger bending roll compensation increases the uneven force on the working roll and backup roll bearing of the straightening machine, shortens the service life of the bearing, and even causes the bearing to break, which affects the production rhythm. Therefore, the actual use of the bending roll of the straightening machine The amount of compensation needs to be limited within a certain range, so that the extremely thin and medium-thick plates cannot be effectively straightened by conventional straightening processes

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