BROACHING OF SERRATIONS: WITH JUST ONE PUNCH!

ADVANTAGES:

  • Much faster machining process when compared to milling or hobbing
  • Significant unit cost reductions by up to 40 %
  • The entire machining process mostly can be performed on the lathe

 

In the search for potential cost savings, it is worth considering Schwanog’s broaching (punch) rings when manufacturing serrations. Using this process the serrations are punched into the solid stock with just one stroke finishing the process significant faster when compared to conventional milling or hobbing processes.

Another advantage over the milling process is that the broach ring can broach right up to the collar which isn’t possible when milling due to the milling cutter diameter.

A relief at the end of the serration is suggested for chip removal as well as the decreasing cutting speed towards the end of the process.


TECHNICAL FACTS:

  • This however requires, depended on the application a stationary or revolving broach holder.
  • The broach holders are designed in a way that for the most part a broaching machine is not required.
  • The inclined 1 design of the broach holder allows to reduce the contact pressure by up to 80 %.
  • This is achieved by concentrating the contact force on a reduced segment of the profile to be broached.
  • This brings us a further step closer to machine complete parts on a lathe.
  • Broaches can be used on almost any material up to a tensile strength of 1000 N/mm2. Materials above 1000 N/mm2 are no longer suitable. Other limits are imposed by the depth of the serration and machine rigidity.


Schwanog. The Cost-cutter!

 

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