+49 15 234 777775
+49 15 234 777775

Rail-welding machine B120AC

BAIDIN GmbH offers suspension-type AC flash butt rail-welding machine B120AC. It provides in-field flash welding of rails by continuous or pulsating burning-off, followed by flash trimming. Rail cross sectional area ranges from 6500mm2 to 12000mm2.

The welder B120AC can be powered from AC mains, diesel-generator plant and motor-generator set.

Advantages of the flash butt welder B120AC:

  • The guaranteed high stability of welding quality according to the European standard EN 14587-2
  • Powerful performance
  • Completely automated process of rails centering
  • Completely automated process of welding
  • Possibility to weld the long strings of welded rails direct on the way due to big travel (150 mm) of the welding machine mobile case (tightening of strings).
  • Completely automated and independent process of rag cutting (flash) without unclamping movement of both ends of the welded rails
  • Computer documenting (certification) of each welding seam (joint) with registration of all operational parameters

The primary side of a welding transformers of a machine is powered by a 3-to-1 phase converter. This converter rectify 3-phase genset voltage and creates a single-phase 50 Hz sinusoidal voltage. This innovative solution creates more uniform load on a genset, without major imbalance. Also this solution enables on-the-fly regulation and stabilization of the primary voltage on welding transformers.

More than that, use of such converter for a voltage regulation allow one to refuse from using SCR regulation and bulky autotransformers, while maintaining more favorable conditions for welding process, as the current is sinusoidal also.

The complete set of delivery includes:

1. Welding head.
2. Control cabinet.
2.1. Power system.
2.2. Air conditioner.
3. Pump station.
4. Electric connectors.
5. Hydraulic connectors.
6. Spare parts.

Technical features

Parameter Value
Power supply rated voltage, V 380
Power supply: rated frequency, Hz 50
Power at 50% duty cycle, kVA 220
Duty cycle of the welding transformers at rated load, %, not exceeding 50
Arrangement of the welding transformers' connection to the mains phase-to-phase
Rated secondary circuit current (continuous), kA 21-23
Short-circuit current at minimum distance between the clamps, kA At that, short-circuit resistance, mOhm, not exceeding 65±10% 105
Maximum short-circuit power consumption, kVA 500
Short-circuit power factor 0,5
Upset force at a pressure in hydraulic system of 25 MPa, kN 12008%
Maximum cross section of welded rails, mm2 12000
Time needed for welding rails with cross section of 8,265 mm2, given out-of-squareness not exceeding 2 mm, s 90-150
Clamping and upsetting devices hydraulic-powered
Pressure in the hydraulic system, MPa (bar) 25 (250)
Pump station capacity, l/min, not below 50
Maximum clamping force at a pressure in hydraulic system of 27 MPa, kN 2800
Upset value, mm, max. 15
Upset rate, mm/s, minimum 50
Flashing speed, mm/s 0,2-3,0
Total travel of welder at 15-mm upset, mm 150
Rated capacity at welding rails with cross section of 8,265 mm2, joints per hour 8
Welding rail length, m 0,8-1000
Cooling water flow at a pressure of 0,15 MPa (1,5 kgf/cm2), l/min
through the welder jacket, not below 25
through the pump station jacket, not below 40
Weight of welding head, kg, max. 3800
Dimensions external of welding head:
Length, mm 1920
Width, mm 1020
Height, mm 1070