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Description
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With flow punch forming bushings or eyelets can be produced in thin-walled metals without cutting up to a wall
thickness of 12 mm. Bushings or eyelets can be obtained with up to 4 times the original thickness of the material
in diameters of 1.8 mm to 32 mm.
Flow punch forming is based on a combination of axial force and relatively high speed, which results in heat from friction.
The frictional heat and high contact pressure plastify the material and enable the hotdrill to go through the material
in a matter of seconds.
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The Advantages of
Flow Punch Forming
- Time saving.
- Less material and lower weight due to the use of thin profiles.
- Increase in the drawing forces of threads (thread forming).
- Tightness of the clearance holes.
- Detachable connections - The basic material remains unalloyed.
- No reinforcing welding, riveting down, or welding screw nuts necessary.
- Increase in hardness - for example less wear with multiple connections.
- Only one basic material, thus avoidance of electrochemical corrosion.
- High load capacity of bearing bushes.
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Which materials can be
processed with hotdrill?
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Flow punch forming can be used with virtually all thin-walled metals (excluding
tin or zinc); for example all welding steels, stainless steels, aluminium, copper, brass, bronze, magnetic materials and special alloys.
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Requirements for Flow
Punch Forming
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Any column drilling machine with sufficient power or NC/CNC machining center,
etc, with the required speed and kilowatt output is basically suitable for flow punch forming
For secure clamping of the hotdrill, a special collet chuck with cooling
ring was developed with which the heat can be dissipated ideally.
For optimal concentricity a special collet is used for locating the hotdrill.
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