Requirements for Flow Punch Forming

Necessary Mechanical Equipment
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 (see Process data).

Collet Chucks with Cooling Ring
Due to the extreme thermal fluctuation and the radial load, proper clamping of the workpart and the flow punch former is critical. The warmth generated during the process must not be allowed to enter the spindle but instead must be deflected or cooled. Customary three-part chucks can cause breakage of the flow punch former if it is not clamped centrally!

For this reason a collet chuck with cooling ring was developed especially for flow punch forming with centerdrill, with which the heat can be dissipated ideally and a secure clamping can be ensured. The spindle holding fixture MC2 is standard for flow punch formers up to dia. 14 mm. For larger flow punch formers we recommend an MC3. For CNC machining centers, HSK holding fixtures can also be used.

Collets
For optimal concentricity and secure clamping, a special collet is used to locate the centerdrill.

Parting Paste
Moistening the centerdrill with our highly heat-resistant parting paste, matched to the respective material to be processed, is important for the service life of the centerdrill. The paste can be applied manually or with a spray device.

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Requirements for Thread Forming

Required mechanical equipment for thread forming with centertap
Any customary thread cutting device can be used for thread forming. However, a processing speed is required that is between 3 to 10 times faster than for thread cutting. If a machine is not available on which the direction of rotation of the spindle can be switched, we recommend using a special thread cutting unit

Thread tapping chuck
For location of the thread formers in machines with switchable direction of rotation we recommend a chuck with longitudinal compensation in tensile and compressive direction and "pressure point mechanism". This will allow operation of the thread former independent of the axial force and compensate for a possible trailing of the machine spindle in the reversal point. Combined with the appropriate quick-change unit with overload coupling, this ensures the safety function both for the tool as well as for the machine spindle.

Lubrication during thread forming
The use of our lubricant is highly recommended during thread forming. It should be applied before each operation on the center- tap. Our lubricant is ecologically tested according to DIN.