Ringbohrkrone von oben Grafik outlines Zipp Industries



Stable connections for the highest demands

What is friction welding in a nutshell?

Friction welding is a pressure welding process in which two parts are welded together by friction. A part is rotated and pressed against a stationary counterpart under high pressure, and the resulting friction heats the joint surface. After the process temperature has been reached, a defined movement is carried out, during which, under the influence of pressure, the heated material pushes away and plastically deforms. The rotation is then stopped and the pressure is increased again; after reaching the specified pressure, the pressure is maintained for a certain period of time. No additional materials such as additional materials are required to assemble the parts.

The special feature of this process is the enormous flexibility to be able to produce a wide variety of material combinations.

Friction welding technology is known for the safe and economical connection of different materials.

Oversize friction welding

With our friction welding system, parts with a standard diameter of 51 mm to 177.8 mm and in lengths of 0.5 m to 6.0 m manufacture.

So sieht das Reibschweißen aus

Benefits of Friction Welding

We document every weld in detail.

  • Short welding time, very fast process
  • Flexible batch sizes
  • Excellent welding quality
  • Clean manufacturing
  • No additional materials
  • Low material loss
  • Optimum strength values in the weld seam (after annealing treatment)
  • High quality standard due to good reproducibility of welding parameters through process monitoring and logging
  • Final inductive heat treatment for stress-free welds

Our Services

Preparation of test pieces

We produce individual test pieces for you so that you can accurately assess whether your project can be implemented.

Serial and individual production

Our friction welding system is designed for the production of
extensive series orders.

We can friction-weld these dimensions:

  • Standard diameter of
    51 mm to 177.8 mm
  • Lengths from 0.5 m to 6.0 m

Combination of disparate metals by friction welding

Our products are made from a variety of materials. Our pipe material is usually made of S355J2+N structural steel, which is easy to work with and excellent weldability. The connectors are made from 42CrMo4V. The alloy steel has high strength, high toughness, good hardenability and high fatigue strength.

As a rule, any malleable metal can also be friction-welded. Although a connection made of copper-aluminum is generally considered not weldable due, among other things, to the specific electrical resistance of the copper, it is easily possible to produce a long-lasting connection with the friction welding process. Without complex end face processing, sawn or sheared surfaces can be joined by friction welding.

heat treatment with induction

In order to reduce the tensions in the material caused by the friction welding process, we specifically heat the weld seam with our annealing system via induction. And carry out a targeted heat treatment process on the weld seam.

Induction is a flameless and contactless heating method that can heat up a defined area such as the weld seam and the adjacent heat-affected zone within seconds after friction welding without touching the component.

This creates a magnetic field around the inductor. This magnetic field specifically heats the material at the weld, as the inductor is specifically placed on the weld seam. As a result of the holding process, the temperature is kept constant for a fixed period of time so that the diffusion processes are completed, thereby reducing the tensions and bringing them to normal levels.

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