Centerdrill
The Centerdrill
Flow Punch Forming Process
With flow punch forming bushings or eyelets can be produced in thin-walled metals without cutting up to wall thickness of 12 mm. Bushings or eyelets can be obtained with up to 4 times the original thickness of the material in iameters 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 centerdrill to go through the material in a matter of seconds.
Economic Benefits
- Chipless forming process: no connecting elements needed
- A single operation for the manufacture of eyelets
- Process can be automated
- A column drill is sufficient: no additional equipment costs
- Minimum setup times
Ecological Benefits
- High-strength connections can be produced using the centerdrill process without additional materials. The basic material remains unalloyed and easy to recycle! Chip removal is not necessary.
- Centerdrill connections are detachable and offer significant advantages for subsequent dismantling compared to other processes.
The Advantages of Flow Punch Forming
- Time saving
- Less material and lower weight due to the use of thin profile
- Increase of the drawing forces of threads ( thread forming)
- Tightness of the clearance holes
- Detacthable connections-The basic material remains unalloyed
- No reinforcing welding,riveting down or welding screw nuts necessary
- Increase in hardeness-for example less wear with muliple connections
- Only one basic material, thus avoidance electrochemical corrosion
- High load capacity of bearing bushes
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