GB800860A - Improvements in or relating to devices for joining together a plurality of rolled bars - Google Patents

Abstract

800,860. Making bars; welding by pressure; rolling. HUTTENWERKE ILSEDE-PEINE A.G. April 21, 1955 [May 10, 1954; March 2, 1955], No. 11570/55. Classes 83 (2) and 83 (4). In apparatus for joining rolled bars end-to-end, one or more welding devices move in a path about an axis and move over at least part of the path with the ends to be welded and bending devices move with the or each welding device to bend the bars to correspond to at least part of the path. Bars 1, Fig. 1, are fed from the left into a furnace 2, devices 3 push the bars through the furnace, and the bars are ejected by a device 4 to be fed by rollers 5 and grasped by one of the two pressure-welding devices 6, 9 rotating about an axis 7. Bending device 8 rotating with the devices 6, 9 bend the bars and heat-resistant channel 10 extending the length of the arrow 11 prevents heat loss during welding. Welding burrs are removed by milling or grinding apparatus 12 before a device 13 bends the welded bars into wavy form to be advanced through an annealing furnace 15, e.g. gas-heated. Rollers 17 straighten the welded bars before they enter the roll housing 18, a cutter 19 being provided. In one modification the annealing furnace is provided by induction coils. In another modification, in which the welding devices move with the ends of the bars through substantially a complete circle, the welded bars are fed out from the welding devices in the direction of their original feed-in. In a further embodiment two sets of three welding-devices 41, Fig. 4, are provided, rotating on a common axis 49, one above the other, to deal simultaneously with two sets of bars. A path other than a circle may be obtained for the welding devices by' adjusting their radial distance from the axis of rotation. The welding devices may have variable speed drives which are controlled by or control the drive for the bar supply.