| 摘要 |
The present invention provides a method to bend a thick steel plate. The method comprises the steps of: preparing a thick steel plate and marking a plurality of middle lines to press the upper surface of the thick steel plate; placing the thick steel plate, which has the middle lines marked thereon, on a burner to pre-heat the thick steel plate at specified temperatures; installing a plurality of lifting lugs on the outer surface of the thick steel plate; bending the thick steel plate by pressurizing both marked ends of the thick steel plate after connecting a hook of a crane to the lifting lug to arrange the thick steel plate, and mounting the thick steel plate on the upper surface of a bottom die of a pressurization press; mounting the thick steel plate on the burner again to heat-treat the thick steel plate to relieve stress of the thick steel plate; and successively pressurizing the thick steel plate along the marked middle lines of the thick steel plate from both ends of the thick steel plate toward the center of the thick steel plate to finish a curved surface. Therefore, unlike a conventional hot work, the method does not require a special heat-treatment process to correspond to a strength criteria in accordance to the components of the thick steel plate, thus reducing significantly the processing costs for the thick steel plate and additional heat treatment to relieve the stress of a steel material when the thick steel plate is bent; thereby allowing a single process to be applied to process the curved surface of the thick steel plate without cracking and brittleness fracturing. |
