Equipment for prodn. of hot rolled steel plate, and device and method for thickness forging therefor

Production apparatus and method for producing hot-rolled steel sheet is coiled slab after the continuous casting and rolling roughing processing, cooling, wherein the rough slab is reduced and processed into a thin slab continuous casting, finish machining the thin slab is rolled, the hot rolled strip which is rolled to a predetermined thickness. Roughing at least a part of a parallel portion 6a and a pair of inclined portions 6b of the outlet side with the inlet side of the die 6. Further, the thickness of the material before forging in the thickness direction of the metal mold, at least one end to the front end portion and the rear portion of material is pressed so preformed in the width direction.