Device and method for manufacturing hot-rolled sheet steel and device and method for sheet thickness pressing used for the device and method
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United States of America Patent
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Apr 20, 2004
Grant Date -
N/A
app pub date -
Feb 26, 2001
filing date -
Mar 10, 1999
priority date (Note) -
Expired
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Abstract
According to an apparatus and a method for manufacturing a hot-rolled steel plate, a roughing process for reducing a thickness of a continuously cast slab is performed to obtain a sheet bar, and a finishing rolling process for rolling the sheet bar is effected to produce a hot-rolled steel plate having a predetermined plate thickness. After cooling down, the hot-rolled steel plate is then wound. A pair of dies 6 each of which has a tapered portion 6b on an input side and a parallel portion 6b on an output side are used in at least part of the roughing process. Further, before performing plate thickness pressing to a material in a plate thickness direction by using the dies 6, at least one of a front end and a rear end of the material is pressed in a widthwise direction to be pre-formed.
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