Cutter INSERT definition (inside turning)

paehv · 2005-01-26 10:43:06

When defining a turning tool with INSERT or PROFILE it is not posible to
define a clearance angle.
Some inserts get their clearance by tilting the insert a few degrees. This methode works fine in Vericut.
The problem is that when turning inside diameters, with inserts that have a
clearance, and cannot be tilted in Vericut due to their shape or orientation, we are not able to simulate/verify this with Vericut.
Does anyone know a work around.
:?

paehv · 2005-01-26 11:54:10

Ooh Nooo! :cry:

I was wrong! Tilting an non clearanced insert works when looking at the "Machine Cut stock" view, when looking at "workpiece view" the insert is not tilted :?: :?: :?: :?:

When having the 2 views visible, the machine has a tilted insert, in workpiece there is a non tilted. (Witch one is used for cutting ? and calculating autodiff, x-caliper)

BillH · 2005-01-28 21:52:18

Hi Patrick,
VERICUT turning material removal uses a 2D profile (as defined in tool manager) to remove material. The software checks to make sure this 2D profile is in a valid turning plane (any plane containing the stock Z axis). That is a requirement for turning material removal. The image of the insert with some thickness is only an image.

Sounds like additionally you would like to check for the "heel" of the insert dragging inside a bore. The only way to do it is to define the actual insert shape and position as another piece of the tool assembly (using an stl file of the insert as a holder). Then check for collisions in machine simulation between the tool holder (with the insert STL model) and the cut stock.

This is certainly not an ideal situation, and not easy to implement, and maybe not worth the trouble. I doubt you will be able to check the heel clearance the way you want to anyway, because the distance between the insert heel and the cut stock inside diameter are so small, and almost tangent, that VERICUT will have a difficult time telling the difference between when the insert heel drags and when it clears.

We would like to do a better job of this in VERICUT, but not sure how at the moment. We have to project the insert profile into a turning plane. If the profile has a radius, and is tilted, then the projection of the insert radius is an ellipse. You probably do not want to do turning with this ellipse.

Sorry, but so far we just do not have a good solution for this situation.

Bill

paehv · 2005-01-31 07:32:00

Bill,

Thanks for your reply and explanation. It made a lot of things clear.
It is not that we want to check the heel-clearance, but I did not know that calculations are done with the projected insert, and that the thickness of the insert (and therefore the heel clearance) doesnt influence the accuracy.
You are right that a tilted insert with nose-radius would be projected as an ellipse, but that is what happens in reality too, so thats OK.

VERICUT Users' Forum

#1 2005-01-26 10:43:06

Cutter INSERT definition (inside turning)

#2 2005-01-26 11:54:10

Re: Cutter INSERT definition (inside turning)

#3 2005-01-28 21:52:18

Re: Cutter INSERT definition (inside turning)

#4 2005-01-31 07:32:00

Re: Cutter INSERT definition (inside turning)

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