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Help with toolpath for cross hole deburring in tube using special tool for hole dubrring

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Message 1 of 3
tlamb
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Help with toolpath for cross hole deburring in tube using special tool for hole dubrring

I need help with creating a "custom" toolpath for a hole deburring tool that deburrs the top and bottom side of drilled holes by feeding in and out like a drill. I have been asked to utilize it more and more on our machining processes to eliminate deburring of holes outside of the machine. In this application I am deburring Ø0.515" holes thru both walls of 1.25" X 1.25" X 11GA wall steel tube.  Here is the tool I am using: https://www.heule.com/en/tools/deburring/cofa

And I've attached a pdf the steps and parameters they suggest for programming. 

 

What I need to do is(bare with me, it will seem like a lot the way I explain it, but conceptually it really isn't):

  1. rapid down to a height above the hole on the top wall of a rectangular tube
  2. feed down to a height to deburr the top side of the top hole
  3. rapid down through the hole to a height above the hole in the bottom wall
  4. feed down to a height to deburr the top side of the bottom hole
  5. rapid down through the hole in the bottom wall of the tube, rapid up to a height just before the bottom hole
  6. feed up to a height to deburr the bottom side of the bottom hole
  7. rapid up through the bottom hole to a height just below the bottom of the top hole
  8. feed up to a height to deburr the bottom side of the top hole
  9. rapid up through the top hole and up to a retract height before repeating on all the other holes in the part

My initial thought was to just utilize the reaming cycle to feed in and out. While that certainly gets the job done, it is very slow and inefficient, especially when feeding through the air space in between the walls of the tube. I like to believe I'm pretty experienced with both Fusion 360 and Inventor and have programmed many parts on many different machines. I have had to come up with some creative ways to machine certain features but this has got me stumped. And since this is something I am being asked to start implementing I need something fairly easy. I'm hoping maybe there's a type of toolpath I have not tried or that I can create some kind of template to make it easy to implement on other parts. 

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Message 2 of 3
seth.madore
in reply to: tlamb

I don't think you're going to find one single toolpath that does this all for you in one shot. You might want to look at the Back-Boring drill cycle, but the post would have to be customized for it.

 

From a machinist point of view, I would look at making a macro, which shouldn't be too hard. Define overall depth of hole, thickness of each web, distance between webs. It would be some trial and error on your end, for sure. You could then save that macro as a Manual NC and insert it in whatever part you're programming


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 3 of 3
tlamb
in reply to: seth.madore

Thanks. That is what I ultimately ended up doing. I have not had a chance to proof it on the machine yet but I think it will work. I have not utilized the manual NC command yet so I’ll have to spend a little time to get that figured out but once I do it will hopefully be easy to implement moving forward. Thanks for the response!!

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