GB1372616A - Seam welding machine for making transverse welds on a moving workpiece - Google Patents

Abstract

1372616 Welding by pressure INSTITUT ELEKTROSVARKI IMENI EO PATONA AKADEMII NAUK UKRAINSKOI SSR 9 June 1972 27186/72 Heading B3R A seam welder for making transverse welds on a moving workpiece comprise a support 1 having guideways 2 extending longitudinally of the direction of travel of the workpiece, a bogy 4 mounted for movement along the guideways 2, a carriage 8 carried on the body for movement along guideways 6 transverse to the direction of movement of the bogy, the carriage providing a path therethrough for the workpiece, two pairs of wheel electrodes 9 pivotally mounted on the carriage by means of levers one pair above the path and the other below its pneumatic pressure applying devices 14 for the electrodes, one transformer connected to the upper electrodes and another transformer connected to the lower electrodes, a gripping device 22 mounted on the body for clamping to the moving workpiece and a drive 5 for moving the bogy until the device 22 attaches to the moving workpiece and for returning the bogy to its initial position. The bogy 4 is moved along rails 2 by an hydraulic drive 5. Each electrode wheel 9 is mounted on a single shaft 12 and a dressing device for the electrode wheels is provided. The gripping device 22 is actuated by a pneumatic drive 24. In operation a moving workpiece in the form of metal shaped to form connected panel radiators welded longitudinally is fed into the machine and when a recess between two adjacent radiators enters the machine a signal is sent to the drive 5 to move the bogy at a speed less than tha t of the workpiece. When the recess arrives between a pair of electrodes another signal is sent to cause the gripping means 22 to clamp the workpiece and to de-energize the drive 5. The body now moves along at the speed of the workpiece, the electrodes are lowered on to the recess and the carriage is moved transversely to the workpiece. After welding the means 22 is released and the car is returned by the drive 5. The next welding is effected by movement of the carriage 8 in the reverse direction. Two carriages 8, 26 are provided, moving in opposite directions along guide rails 6.