GB785870A - Tube turner for plug mills - Google Patents

Abstract

785,870. Rolling. AETNA-STANDARD ENGINEERING CO. May 23, 1956 [June 9, 1955], No. 15925/56. Class 83 (4). In a tube rolling mill in which the tube is drawn over a mandrel plug 22, Fig. 1, by grooved rolls 11, 12 and returned to a table 24 by stripper rolls 14, 15, the table 24 is provided with a gripper 45 which rotates the tube through 90 degrees before it is fed forward into the next rolling pass. The table 24 rolls laterally on rails 30a, 31, Fig. 2, to bring the work opposite the required pass 18 in the rolls 11, 12 and comprises a trough 25 of longitudinal strips 28 along which the tube is moved by a pusher 26 actuated from a fluid-pressure cylinder 27. The gripper 45, Fig. 3, has interchangeable jaws 49, 50 for different sizes of tubes and comprises clamping arms 47, 48 which are actuated about pivots 51, 52 by a fluid-pressure cylinder 58 and are coupled to move in unison by gear teeth 55, 56. The arms are mounted on a carriage 54 which moves along arcuate tracks 66 on rollers 65 under the action of a fluid-pressure cylinder 92 to which it is coupled through crank arms 87, 90 and a link 86. The tracks 66 have their centres on the axis of the tube and their length is such that the tube is rotated through 90 degrees. The tubes are supplied to the trough over skids 32 when released by stop arms 33 which are lowered by the rotation of a shaft 34 under the action of fluid cylinder 35. The finished tubes are removed from the trough by arms 36 on a shaft 37 which is rotated by fluid cylinders 38.