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Spot welding

Spot welding is a type of resistance welding. The welding process is used primarily in the automotive industry. Using the Delta Spot process, we can even join raw materials, such as aluminum, that cannot be welded normally. 

Spot welding: the technology

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 resistance spot welding with RoboSpin process: shorter cycle times and higher welding quality even for joining aluminium

The robot rotates the servo gun during the welding process, thus significantly increasing the service life of the electrode caps.

KUKA technologies for spot welding applications:

The robots and technology packages from KUKA not only increase the performance of your spot welding applications, they also simplify and minimize their configuration, commissioning, maintenance and service. All this significantly reduces their production costs per part.

KUKA.ServoGun: software package for controlling spot welding guns

Ensures optimum force accuracy for higher quality, precision and resistance to external influences.

KUKA_ServoGun

KUKA.RoboSpin: software option for spot welding of aluminium

Higher weld quality, longer tip life and shorter cycle times by rotating the gun around the Tool Center Point during welding.

KUKA_RoboSpin

KUKA.EqualizingTech: software option for simple gun compensation

Allows gun compensation via robot movement without additional components – for less maintenance and reduced overall weight.

KUKA_EqualizingTech

KUKA.SafeOperation: software for safe human-robot-collaboration

Creates and monitors working and protective areas on robot cells and ensures shorter cycle times and reduced space requirements.

KUKA_SafeOperation

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