Helical groove, peel mill?

[Paul_RagotCADCAM]

1 of my customers machines level winding screws for winches (a.k.a. diamond screws).

It is a helical groove, 1/2" wide, on a 3" shaft, about 0.4" deep.

He does 4 passes, 0.11" deep each, and uses axis substitution to make the helix. Works OK, but pretty hard on the tool (3 flute).

 

Has anybody tried peel mill + axis sub?

Peel does wonders on grooves so would using a 3/16" EM to rough out the groove, on the rotary axis be faster/better?

I'm not sure if the rotary axis (on a Haas TM3) would agree.

File would be long but 'tape mode' solves that.

[Matthew Hajicek - Singularity]

Good idea, don't see why it shouldn't work.

[YoDoug®]

For roughing I would use an endmill with feedmill geometry on the bottom. Axis sub cuts with the tool on centerline and puts a lot of force back into the center cutting portion of the tool. A normal endmill may only be one or two flute effective at the center.

[GoetzInd]

+1 to what Doug said. Maybe try a multi axis and set a lag angle to reduce the axial force and increase the feed.

 

Mike

[Paul_RagotCADCAM]

YoDoug,

 

Thanks for the feedback, do you have an example of such a tool? Mfr/ #?

 

Like Sandvik high feed CoroMill 210? (It's not ctre cutting)

 

I also think the lead/lag would be beneficial too. Although it takes a bit more software (for the customer) since it is no longer axis sub but either rolldie or curve5X.

 

Paul

[workmantm]

OSG makes one, List 4470. I have no experience with there High feed solid EM's, but I have had lots of good luck with several other newer generation tools.