Professorship of Welding Engineering
Research field Beam and special joning Processes
Professorship of Welding Engineering 

Research field Beam and special Joining Processes

 

The beam and special processes working group focuses on laser beam technology, diffusion-based joining processes, microfabrication and the joining of special materials.

Keywords:
  • Laser welding
  • Surface modification by laser
  • Diffusion welding and bonding
  • Ultrasonic welding
  • Soldering and brazing processes
  • forming joining processes (clinching, riveting)
  • microjoining technology
  • Characterisation of joints
Portrait: Contact: Dipl.-Ing. Holger Letsch
Contact: Dipl.-Ing. Holger Letsch

 

Joining Equipment:
  • NdYAG-Laser, 2,5 kW
  • Fibre laser, 1 kW
  • Diode laser, 4 kW
  • NdYAG-Laser, pulsed-mode, 120 W
  • Ultrasonic welding unit, 35 kHz
  • Diffusion welding unit, 80 MPa, 1000°C
  • Induction soldering/brazing unit, bis 50 kW
  • vacuum brazing furnace, up to 1300°C
  • Clinching units, up to 130 kN

 

Manipulator systems:
  • 5-axis-CNC-units with linear actuator
  • Various direct and scanner optics
  • Partially mechanised workplace with microscope view
  • 6-axis-robots
  • mechanised cold wire feeding systems
  • Micro wire-feed systems
  • mechanised powder feeding systems

 

Measurement Equipment:
  • Laser beam diagnostics (beam power, beam properties)
  • High-Speed-Video-Systems up to 100.000 B/s
  • Measurement instruments for force and distance
  • Scanner/digitizer for geometry capture and path planning
  • 3-D-Laser profil sensor
  • Thermography by using a thermocamera and pyrometer

 

Services for the Industry:
  • Joining tests
  • Process parameterisation/Parametric studies
  • Development of joining strategies
  • Design of joining devices and handling systems
  • Support with component construction/joint design
  • Manufacturing of prototypes/sample assemblies
  • Characterisation of joints