Spot welding

Spot welding creates strong joints by means of high pressure in a relatively small area and high energy in the form of electric current. The most important parameters for spot welding are:

• Current
• Resistance
• Heat
• Pressure
  
  

During spot welding, the two welding electrodes press the components together. The weld current is then switched on. The contact resistance results in thermo-electrical heating and the material melts.

The current is then switched off. The molten material hardens, forming a joint that cannot be separated. The pressure must be maintained while the melt is cooling to avoid pore formation.

Automated spot welding is the optimal solution for shortening the spot welding cycle time and for enabling the joining of aluminum. KUKA offers two processes for your production requirements:

• Delta Spot: Circulating process belts between the electrodes and the plate to be joined (for example aluminum) extend the service life of the electrodes. The process belt is also characterized by high electrical resistance. It can thus conduct additional heat energy from the outside inwards during the welding operation. You require less energy, which is particularly beneficial when welding aluminum.
• RoboSpin: A robot rotates the servo gun during the welding process. Welding and gun motion are no longer executed consecutively, but simultaneously. This results in shorter cycle times during spot welding.

Our Delta Spot and RoboSpin process technologies for spot welding achieve the following: 

• Faster cycle times
• More cost-effective production
• Joining of a wide range of different materials