Patent ID: 7093473
Filing Date: 2006-08-22
Classification: B21B

Abstract:
1. An apparatus for manufacturing a band plate, comprising a rolling mill that includes: a pair of upper and lower work rolls that roll a slab material having edge drop portions at both ends thereof; and a pair of backup rolls that contact non-rolling side surfaces of the pair of upper and lower work rolls, respectively to prevent the work rolls from being deformed, wherein each work roll comprises the upper and lower work rolls are configured to be shiftable individually in the axial direction thereof, and each backup roll comprises an escape portion and a cylindrical contraction diameter portion outside the escape portion, wherein the escape portion has a diameter that gradually decreases towards the contraction diameter portion so as not to contact the reverse taper portion within a shifting range of the work roll, and the cylindrical contraction diameter portion of each backup roll contacts the expansion diameter portion of one of the upper and lower work rolls.