| 摘要 |
Disclosed is a welding head for welding the end of two sections of rail more efficiently. The welding head comprises two half -heads (10) aligned and sliding with regard to one another in a longitudinal direction. Each half -head comprises grip means (12, 13) to grasp a respective section of rail and two electrodes suitable for contact with respective sections of rail in order to carry out a flash butt weld. The head also comprises traction actuator means (20) which extend in a longitudinal direction and are connected to the two half- heads (10) to shift the two half-heads in a longitudinal direction one towards the other, the traction actuator means (20) having a stroke suitable for allowing, during a cycle of welding two sections of rail, simultaneous regulation of rail tensions. A cutting unit (30) removes or trims excess weld material at the end of the welding operation, the cutting unit being set between the half-heads and being configured to slide between and with regard to them in a longitudinal direction by its own actuator organ and configured to move independently of the two half-heads. |
