Railway Industry with igm welding robots

igm have supplied numerous systems worldwide for the robotic welding various components for rail vehicles, including motors, frames, pivoted bogies, side panels, roofs, front panels for freight cars and wagons, locomotives, high-speed trains, subways and streetcars.

End product: Locomotives


  • main frame
  • buffer
  • motor cases
  • bogie

igm specializes in custom welding robot systems for tasks such as the production of bogies and their components. For the subassemblies, floor tracks with rotary arms are usually used; during assembly, the robots are placed on 2- or 3-axis slide systems. L-shaped manipulators are often used to permit high-quality welding in the flat position.

In the complete fabrication of passenger cars, different processes such as MIG/MAG, plasma, contact points and resistance welding are combined on fabrication lines with corresponding clamping and transport systems.

High-speed trains

High-speed trains represent a particular challenge for fabrication. Our welding robot systems can also handle these high-load and safety-relevant workpieces. Robot portals with one or two robots are particularly well-suited for these extremely long workpieces. This type of machine is also very well-suited for the placement of multiple workstations one behind the other.

Local trains

For local trains, bogies, roof sections, and window frames are fabricated using standard robot systems or with custom portal solutions using MIG/MAG single-wire and tandem, plasma, and spot welding processes.
Subway train sets require aluminum bodies. Equipped with a push-pull wire feed on the "TorchDrive" wrist joint and the iCAM laser camera, these robots can also handle this application.

Freight cars

For freight cars and their components, carriage systems with up to 3 linear axes are used that permit the machining of complete superstructures suspended between manipulators. Smaller parts such as bulkheads are welded by 2 robots using a continuous process.

Main frames, bumpers, and drive motors represent the area of application of igm welding robots for locomotives. The significant differences between these components are reflected in similar differences in the design of the robot systems. 3-axis carriage systems are particularly suitable for frame elements, while even small robot stations with standing robots can be used for motors.