Patent ID: 6038905
Filing Date: 2000-03-21
Classification: B21B

Abstract:
Device to remove working rolls in a four-high rolling stand comprising upper working roll and lower working roll, associated with respective supporting chocks, and relative back-up rolls, upper and lower, associated with respective supporting chocks, wherein at least the chocks of the lower back-up roll laterally and partly contain the chocks of the lower working roll, the device comprising a pair of sliding rails mounted on board the chocks of the lower back-up roll and movable vertically with respect thereto, the rails including a first lowered, or inactive position, and a second raised, or working position, associated with the chocks of the lower working roll, the chocks being associated at a lower part with sliding means suitable to cooperate with the rails located in the raised position, the device further comprising actuators to lift the rails arranged in cooperation with the lower plane of the rolling stand and contained inside a space of the chocks of the lower back-up roll, the actuators being connected to respective rails by respective extension rods arranged on an axial extension of the actuators.