FIELD: machines for roller welding. SUBSTANCE: roller head of welding machine has current-transmitting device 7 located between rotor 4 carrying the roller electrode and stator. Current-transmitting device is made in form of circular disk 8 which is secured on stator over outer circle and carries slip-ring 11 over inner circle. Slip-ring 11 is mounted for sliding contact with slip- ring 15 secured on rotor. Disk 8 is flexible. Current-transmitting device made in form of flexible disk with sliding contact is used instead of devices made in form of liquid metal which are used roller head. EFFECT: enhanced reliability. 1 cl, 2 dwg
