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Extrusion Tap: Talking About The Principle Of Thread Forming And The Process Of Extrusion
Sep 01, 2018

Extrusion Tap: Talking about the Principle of Thread Forming and the Process of Extrusion

The extrusion taps are made of high quality high speed steel and are prefabricated with lubrication grooves and TIN coated for special applications.

The square shaft of the tail of the tap is an optimized design for transmitting the torque required for tapping. The thread processed using the chipless extrusion tap has an extremely high strength compared to the thread processed by the conventional cutting tap.

This chipless extrusion process not only does not damage the inherent fiber direction of the metal, but instead makes the metal material more secure. Therefore, the thread machined with the extrusion tap has mechanical characteristics that resist large tensile forces and torques.

It does not rely on the granular structure of the cutting material to form the thread, but instead the material is extruded and redistributed to form a thread due to the particular geometry of the tap.

Extrusion taps are ideal taps for machining threads after drilling with Fdrill hot melt bits.

extrusion taps

     The bush formed by hot-melt drilling, even at the thin-walled portion of the lower end of the bushing, can squeeze and redistribute the material to form a thread, which effectively ensures the strength of the thread.

Extrusion tapping works:

The cutting tap cuts the material to form a thread.

The inner diameter of the threaded bottom hole of the cutting tap, and the green line represents the inner diameter of the thread of the Fdrill extrusion tap extrusion tapping, which is slightly larger than the inner diameter of the cutting thread.

Squeeze tap extrusion tapping is completely different: the material will redistribute to the inner wall as the extrusion tap squeezes to form a thread.

The extrusion tap retains all the material and forms a squeezed thread to ensure the strength of the thread.

As the metal material moves up and down, a crushing thread is finally formed.


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