MACHINE FOR CONTACT BUTT WELDING OF RAILS Russian patent published in 2002 - IPC

FIELD: rail welding in field condition. SUBSTANCE: hydraulic cylinders for flashing off are in the form of tandem cylinders, each having two pistons mounted on rod. Hydraulic cylinder for clamping has hydraulic multiplicator built-in to its rod and having rod-ram and lid-eye supporting pressure valve. Non-return valve with calibrated spring and with stem is mounted in rod-ram. Hydraulic cylinders for centering rail with fixed rods are mounted between double-arm levers of clamping tongs. Hydraulic cylinder for centering is jointly connected with two levers whose lower ends are in the form of hooks. Pins are mounted with possibility of motion on each double-arm lever. Machine includes in addition apparatus for deburring having three cutters for embracing rail profile along its whole perimeter. EFFECT: improved design providing enlarged functional possibilities. 3 cl, 10 dwg