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Technology

For decades, every day has been spent dedicated to stud welding. This section gives you a closer look at the technologies and processes.

Stud welding with ceramic ferrule Short-cycle stud welding Stud welding with shielding gas Stud welding with tip ignition Glossary

Advantages of KÖCO-Stud Welding Technology

By means of KÖCO-Stud Welding Technology, Threaded Studs, plain studs, Tapped Studs, Shear Connectors, Anchoring Studs etc. of diameter 2-25 mm will be cross-sectionally welded onto sheet metal, pipes, profiles etc.

The advantages of KÖCO stud welding technology are obvious:

  • A high degree of safety, thanks to cross-sectional joints
  • High productivity through extremely short welding time
  • Options for various combinations of materials
  • Distortion reduced to a minimum through low thermal stress
  • Very little or no damage to the reverse side
  • Hollow parts remain leakproof
  • Access to parts from one side only is sufficient
  • Easy to operate for personnel trained on the job
  • Conform to international standards: EN ISO 14555 and EN ISO 13918
  • Shear connectors officially approved: European Technical Approval ETA-03/0039
  • Innovative stud welding equipment and welding studs from in-house production
Stud welding with ceramic ring

Step 1

The stud is placed against the workpiece.

Drawing of a welded stud

Step 2

The stud is lifted off, while current is flowing, thus creating an arc.

Drawing of a welded stud

Step 3

The arc melts the surfaces of stud and workpiece.

Drawing of a welded stud

Step 4

The stud is plunged into the weld pool.

View of a finished welded stud

Step 5

A cross-sectional joint is achived.

Overview of the different welding methods

Stud welding with ceramic ferrule

The process “Drawn arc stud welding” is used for studs of an approximate diameter of 3 to 25 mm, welding current up to 3.000 A and welding times up to 3.000 ms.

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Stud welding with tip ignition

The process “stud welding with tip ignition” is used for studs up to a diameter of approximately 8 mm. Studs, having a small cylindric tip, are in use. A capacitor battery serves as power source.

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Stud welding with shielding gas

The process „drawn arc stud welding with shielding gas“ is used for welding studs of a diameter of 3 to 12 mm ( 16mm). In general, the positive pole of the power-source is connected to the workpiece.

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Short-cycle stud welding

The process “short cycle stud welding” is used for welding studs of a diameter of 3 to 12 mm onto thin sheets. The minimum thickness of the sheet is 1/8 of the stud-diameter. This process leads to a flat weld penetration.

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Technical information

Stud welding in accordance with DIN EN ISO 14555

Arc stud welding is a pressure welding process in which stud end and base material are melted by a short burning arc and then joined with low force. In order to achieve perfect results, not only the materials, surfaces and devices must be suitable, but electrical processes must also be coordinated with the mechanical movement. For KÖCO, impeccable quality is the top priority.

Safe stud welding in workshops and on building sites...

Arc stud welding is a pressure welding process. Bolt end and base material are melted by a short burning arc and then joined with low force. In order to achieve perfect results, not only the materials, surfaces and devices must be suitable, but electrical processes must also be coordinated with the mechanical movement.