GB1385495A - Rolling mills - Google Patents

Abstract

1385495 Rolling mills BRITISH STEEL CORP 24 Jan 1973 [27 Jan 1972] 3888/72 Heading B3M A cantilever rod rolling mill includes work rolls 20, 21 carried in individual arms 26 pivoted to each other by a pin 30 to form a sub-assembly which is removable from the mill. The work rolls are backed by rolls 22, 23 carried in pivotally mounted arms 37, the arms being adjustable by eccentric assemblies 100. To remove the sub-assembly from the mill, the backing rolls are moved apart after first releasing a screwdown ram and a pass-line wedge adjuster 87. An adjusting linkage for the pin 30 is disconnected, and a transverse bolt 56 (which retains the assembly axially in the mill frame) is withdrawn. The shafts 24, 25 of the work rolls can then be disengaged from their drive couplings and the assembly withdrawn to the left. The adjusting linkage serves to rotate the pin 30, Fig. 2, which has eccentric portions along its length. These portions co-operate with the two arms 26 in such a manner that rotation of the pin causes the arms to move axially in opposite directions, thereby allowing alignment of the two roll grooves. Each roll is held on its shaft by a hydraulic nut assembly 69. The linkage includes a lever 62, Fig. 1, a link 63, and screw adjusters 64. Loading units 80 and load cells (not shown) are located in the work roll chocks to measure tension in a workpiece being rolled. Further transducers, such as linear variable differential transformers, are associated with the chocks to indicate, and to allow control of, the gap between the rolls. Two such rolling mills may be close coupled in tandem for rolling rod or bar material.