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Backside NPT Thread MIll

6 REPLIES 6
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Message 1 of 7
lmiller
170 Views, 6 Replies

Backside NPT Thread MIll

Hi,

I am making a 1/2" npt thread on a vertical mill with a single form tool. The catch is I want to do it without flipping the part over so that means that the taper will be reversed. I have modeled the hole with the taper but the tool path keeps generating the taper the wrong way. hope this makes sense. Any help would be appreciated2023-03-15 15_38_23-Autodesk Fusion 360.png

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6 REPLIES 6
Message 2 of 7
seth.madore
in reply to: lmiller

I don't think what you're wanting to do is possible


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 3 of 7
lmiller
in reply to: lmiller

Hi Seth,

Is it not possible in Fusion or is it not physically possible?

Message 4 of 7
seth.madore
in reply to: lmiller

Not possible in Fusion with the Thread toolpath. It's a bit hacky, but if you were hellbent on doing it in reverse, you might be able to get a Ramp toolpath to work would need to use a 3D toolpath that supports undercuts AND a ramp move 🤔


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 5 of 7
leo.castellon
in reply to: lmiller

How would you inspect the thread when machining it from that direction? 

 

LeoC

Message 6 of 7
lmiller
in reply to: seth.madore

Hi Seth,

If I were making thousands of these then I'd make an attempt. This project is for a small run so I'll fixture it up and flip the part. Thank you!

Message 7 of 7
lmiller
in reply to: leo.castellon

Hi Leo,

These threads are on the underside of a 22" x 22" PVC plate. I would probably first trial run the thread on small pieces of PVC. Once the program was dialed in, I would run the 22" plate. Since the material is PVC it does not wear on the tools so I would get repeatable results.

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