Manufacture method and rolling device for difference thickness plate

Abstract

The invention provides a manufacture method and a rolling device for a difference thickness plate. The difference thickness plate with the plate thickness changing at very small intervals in the long side direction of rolled materials is reliably manufactured. The manufacture method is characterized in that, the difference thickness plate with the plate thickness changing at very small intervals in the long side direction of rolling materials is rolled by a rolling machine (1) provided with a pair of rollers (2, 2), wherein, in order to realize the plate thickness change Delta h(x) at the output side of the rolling machine (1), when the rolling machine (1) is about to perform rolling or performs heating of the rolled materials (W) in the long side direction in rolling, the plate temperature of the position corresponding to the plate thickness change Delta h(x) is changed by Delta T(x), and rolling of the rolled materials (W) after change of the plate temperature is performed, thereby manufacturing the difference thickness plate.

Description

technical field [0001] The present invention relates to a method of manufacturing a differential thickness plate in which the plate thickness changes at short pitches (short pitches) in the longitudinal direction of a rolled material, and a rolling apparatus that can adopt the method. Background technique [0002] In order to obtain light weight and rigidity of press-formed parts for automobiles, etc., "different thickness plates" are used as rolled materials having variations in plate thickness in the longitudinal direction or width direction. Such a difference-thickness plate includes a welded blank (terra-do-blank) produced by welding two sheets, and a rolled blank in which a thickness difference is imparted by rolling or the like. A rolling split, that is, a differential plate having a different thickness in the longitudinal direction, is usually manufactured by changing the rolling gap during rolling. [0003] However, the above-mentioned press-formed parts for automob...

AI Technical Summary

Problems solved by technology

Therefore, it is not possible to provide a useful technique in the manufacture of "a differential thickness plate whose plate thickness varies at short pitches in the long-side direction of the thin plate" intended by the present application

Even with the technology of Patent Document 4, it is difficult to manufacture a short-pitch differential thick plate with very high thickness accuracy and flatness by cold rolling

Images