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Friction drilling process

Friction drilling is a chipless method for generating bushings. The material is not removed, but displaced with high rotational speed and high pressure, raised into the bead shape and formed into a hole. The stable bushings are produced by material displacement and not by simple removing. This homogeneous deformation ensures not only additional material consolidation, but also a significantly spares time and material. The shape and the diameter of the resulting hole can be determined by the dimension of the cylindrical part of the friction drilling tool.

Step 1

The tip of the GLOWDRILL friction drilling tool is placed on the material.

Step 2

The tool is pressed against the target material with both high rotational speed and high pressure, thereby generating the necessary frictional heat, so the material gets heated. The tool can now perforate the material and form the pull-through.

Step 3

At the beginning the tool is displacing the material upwards against the advancing direction. When the perforation deepens, it generates the pull-throughin the feed direction. The ratio between the upward and downward flowing material is about 1/3 to 2/3.

Step 4

The friction drilling pull-through is finished. Depending on the used tool the flowed upwards material is now formed into a homogeneous collar (Design “Form”) or directly removed (Design “Cut”).

Benefits of friction drilling with Glowdrill
  • it creates sturdy bushings for mounting of soldered and screw connections
  • angular drilling is possible
  • chipless manufacturing method: fasteners are not necessary
  • spares time, efforts and material
  • produces holes in only one operation
  • the process can be automated
  • minimal setup times
  • no rivet or welding on nuts required
  • more safety by homogeneous deformation
  • long service lifetime
  • excellent surface qualities
  • no waste and disposal costs because of non-cutting method
  • high process reliability due to durable carbide tools