Blank and manufacturing technique for rolled plates

Abstract

The invention discloses a blank and a manufacturing technique for rolled plates. The blank is used for the rolled plates; the edge part of the blank is of an arc shape of which the middle part is convex when the blank is viewed from the side, and therefore, the edge part of the blank is of a middle-part-convex shape; while in a traditional rolling technique, a blank with a planar edge part is adopted, so that the defect that a concave dovetail is formed in the edge part of the rolled plate is caused, that is, the middle part of the rolled plate is concave, and two ends of the rolled plate areconvex; the defect can be overcome in the rolling process of the blank of which the edge part is of the middle-part-convex shape; the problem that the concave dovetail is formed on the rolled plate issolved; further a link of sawing off the edge part of the plate in a subsequent process is avoided; and normal proceeding of the technological sequence is ensured. Therefore, the blank provided by the invention has the advantages that the defect that the concave dovetail is formed on the edge part of the plate can be overcome on the premise of not affecting the manufacturing procedure of the rolled plate; and the problem in the field at the present stage is solved.

Description

technical field [0001] The invention relates to the field of plate rolling, and more specifically, relates to a blank and a rolling plate manufacturing process. Background technique [0002] At this stage, the blanks used to make rolled plates have straight sides, that is, the end faces at both ends of the blanks are planar. When rolling such blanks, due to the surface friction coefficient, roll diameter, blank thickness, Due to the influence of rolling process and material plastic flow, the surface deformation of the billet is always greater than the deformation of the center, and finally the edge of the plate forms a concave dovetail shape unique to rolling, and the greater the lateral expansion deformation, the more obvious this phenomenon ; and when the plate is quenched and cooled, the greater the edge tensile stress is, the easier it is to show edge delamination cracks. See figure 2 . [0003] As far as the existing technology is concerned, in order to control the a...

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Problems solved by technology

[0003] As far as the existing technology is concerned, in order to control the above-mentioned concave dovetail phenomenon at the edge of the plate, the problem of uneven edge is usually solved by adding roller edge processing equipment; however, as far as the plate with high strength and large specifications is concerned, the edge The effect is not ideal, and the internal stress in the thickness direction of the edge of the plate is increased

Before the subsequent processing of the board, the concave dovetail part of the board edge can be removed by pre-sawing, but this operation will reverse the sawing process, resulting in a decline in the yield of the board

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