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Process Definition:       Friction Drilling / Flow Drilling / Threadforming
   
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Friction Drilling: (Also called flow drilling, friction stir drilling, and form drilling.)

 
Friction Drilling is a process for generating bushings or holes in thin walled sheet metal, metal tubes, or pipes without metal removal. A rotating, center punch type tool, "Centerdrill", is forced into the material. The heat generated by the friction, heats the surrounding area and plasticizes the material. Without removing material, a hole is then formed by the entering tool, similar to a forging process. The excess material increases the wall thickness of the metal and provides an area of increased support. This eliminates addional welded bracing or the insertion of plugs. Friction drilling is an excellent process to create reliable, stronger connections or bushings.

Friction Drilling can also be used to weld two materials together in the area of the holes.

The process is applicable to radial drills or CNC machines. For more information and brochure contact us with the link provided, or visit the Centerdrill Website.
 
 

 Click here to see a video with friction drilling examples. 

 

Friction Drilling is fast, reliable, economical, and "environmentally friendly."
A stronger connection at a lower price.
 
 
Threadformer / Threadforming: (Replacing threadcutting/tapping with coldforming)

Threadformer are used in a tapping like chipless process to from threads. The prosses is called thread forming. Threadforming is a cold forming process which generates a thread in applicable metal materials. It offers greater reliability for automation and provides a better thread than tapping. Somtimes, threadforming is called chipless tapping, or thread rolling. Threadforming can increase the material strength as a result of the cold formed, compressed material. And while it does not generate cutting chips, the potential for tool breakage caused by  cutting chip interferance with already threaded areas is eliminated. Thus threadformer have increased production reliability. Overall a great cost saving and time saving tool for manufacturing. If you are ready to learn more, go tho the Centertap link.