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Lathe Tool Customization

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Message 1 of 6
ctscsmith
722 Views, 5 Replies

Lathe Tool Customization

So there does not seem to be a way to create tools with compound back angles.  Most ID tool holders have a compound back angle such as in these pictures.  Since it is standard practice to use the largest boring bar possible to avoid chatter, often the 2nd angle is important for seeing how deep into a shallow hole you can go.   Fusion has a great simulator, and using it to watch for the backside of the boring bar touching the opposite side of a hole is something I personally use every day.  

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Message 2 of 6
Anonymous
in reply to: ctscsmith

Actually it is simpler then you think, if back of the boring bar is all you are concern with you can simply sketch few lines representing specific tool geometry then move that sketch in position on part profile where you suspect potential problem to see the result.

It leaves few things to imagination as far as radial clearance but that part is self explanatory, you cannot fit 1/2" inch bar into 3/8" hole as an example.

We tend to identify boring, threading and grooving bars by size of the round shank as I just did in above sentence but what really matters is "minimum bore", diameter that bar can cut and clear without interference with resulting diameter.

One inch shank boring bar holding 80 degree or 35 degree insert have significantly different minimum bore diameter. 

These values are given in tool catalogs but you can simply use calipers to measure distance from tip of the insert to back of the bar shank to get instant estimated value.

I often plot 2D geometry to learn where and how to relieve solid carbide miniature tools to accomplish task and avoid small crashes that ruin parts, to expect CAM system to take on such a task is very trivial and low on list of priorities I would assume.

At this stage you can create custom cutting tips in Fusion and generate G-code to undercut ID profiles axially and radially but modifying tool shanks in arbitrary ways is not part of that functionality.

Message 3 of 6
ctscsmith
in reply to: Anonymous

I have done this before, but it would be really nice if I could just model the tool once, not every time I need to worry about clearance (often).  The simulation will register a crash which is annoying, stress inducing.

Message 4 of 6
Anonymous
in reply to: ctscsmith

You can model tool in 3D, save the file and insert it into current design then move it in place where you suspect a problem and observe the result, but if you use bar within its given specifications, such effort will have mostly confidence building effect.

Message 5 of 6
ctscsmith
in reply to: Anonymous

Again, I understand what you are saying, but dragging a model of the tool around is not an acceptable solution.  I use modified tools too often, and this is much too slow.   There are custom form tools for the mill areas, why shouldn't it work the same for lathe tools?  

Message 6 of 6
akash.kamoolkar
in reply to: ctscsmith

@ctscsmith 

We have a team actively dedicated to improving the tool library, including turning tool definitions so we anticipate that implementing these kinds of tools will be a part of their focus going forward.

 

Regards,

Akash Kamoolkar



Akash Kamoolkar
Software Development Manager

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