Patent ID: 6435449
Filing Date: 2002-08-20
Classification: B21B,B23D

Abstract:
A method for cutting a metal strip which runs out from a hot-rolling mill train at a high speed, shears for cutting the metal strip are arranged downstream of the hot-rolling mill train, the shears being provided between upstream driver rollers and downstream driver rollers, the metal strip running between the upstream driver rollers and between the downstream driver rollers, the upstream driver rollers and the downstream driver rollers exerting a holding force on the metal strip, the upstream driver rollers and downstream driver rollers being controlled by drivers, the method comprising:reducing a front tension in the metal strip between the downstream driver rollers and the downstream driver rollers to a minimum tension; after reducing the front tension, cutting the metal strip; during the cutting, compensating for the minimum tension; after the cutting, reducing the front tension in the metal strip between the downstream driver rollers and a coiler; and after reducing the front tension in the metal strip between the downstream driver rollers and the coiler, opening the downstream driver rollers so that a holding force is substantially zero.