Welding device
AssigneeFranz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H.
InventorHeinz Mühlleitner
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Abstract
A welding device for welding together two rails of a track and producing a welded joint is composed of two halves. An air nozzle and a temperature sensor are mounted on one of the halves. Via a cooling opening of the air nozzle, a glowing-cooled hot welded joint can be cooled in a controlled manner, immediately after a welding bead has been sheared off, by supplying compressed air to the joint. Thus, optimal welding of head-hardened rails can be achieved.
Claims13
A welding device for welding together rails of a track with a welded joint, the rails extending in a longitudinal direction and each rail having a rail head, the welding device comprising:
- two halves each having clamping jaws for engaging a respective one of the rails and being movably disposed in the longitudinal direction;
- hydraulic compression cylinders for moving said two halves in the longitudinal direction relative to one another;
- a shearing knife for removing a welding bead from the welded joint;
- an air nozzle mounted on one of said halves of the device and a temperature sensor;
- and
- a control unit for controlling a welding operation connected to said temperature sensor and configured for supplying compressed air to said air nozzle.
A method of welding together two rails of a track with a welding device, which comprises:
- heated heating the rails with a controlled supply of electric current and subsequently pressing the rails against one another for producing a welded joint with a welding bead;
- removing the welding bead from the glowing-hot welded joint and immediately thereafter placing an air nozzle formed with a cooling opening over the welded joint;
- measuring a temperature of the welded joint;
- after the welded joint reaches a critical starting temperature, automatically supplying compressed air to the air nozzle along with ambient air aspirated in as a result of an inflow of the compressed air into the air nozzle;
- automatically terminating a supply of compressed air after the welded joint reaches a critical cooling temperature;
- and
- lifting the welding device from the welded rails.
Dependencies are inferred from the claim text.