Defining insert drills

[PKrogman]

What is the best way to define a core drill(insert drill) can i make the output have the drill dia. this will force the surface speed?

[Lathe-Mill]

diameter and material (carbide, HSS, etc...)

it will give you speeds and feeds, also depends how you have your speeds and feeds coming from.

from material or tools

[PKrogman]

That is fine but what is the best way to put them in mastercam. I define a drill op. and the code always goes to X0.0 in the lathe version.

[Lathe-Mill]

a 2 axis lathe will always put the drill on X0.0

that has nothing to do with your first question.

[chris m]

I have never used MC to drill off-center in a lathe, which I believe is what you're talking about. You may need to experiment with using a boring operation to accomplish this.

 

C

[Lathe-Mill]

are you talking about G96 on a drill?...

I never use it, always use G97 for drills, taps, treading ops.

[chris m]

I don't know exactly what he's asking but I'm assuming that he's drilling off-center to make a bigger hole which the drills are 'designed' to do to eliminate rough boring. I have never had much success doing this without heavy vibration but I guess if the tool and machine are very rigid it would work. BTW, I would still use G97 for this.

 

C

[mayday]

My guess is he's talking about a core drill, Like trepaning that leaves a slug. I guess

[Lathe-Mill]

i have done before,but doing just enough to fit a selected boring bar,grooving tool ... not use that much....slow process, is why i remove just enough material to fit a boring bar, then blast away!

[Brendan P]

quote:

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My guess is he's talking about a core drill, Like trepaning that leaves a slug. I guess

---

I think this is exactly what he is talking about.

I have used these core drills before.

They actually worked pretty good,because we could make a different part with the left-over slug.

I guess it may be a little difficult to "describe" this tool in mastercam.

[CNCGUY]

If we are talking about drilling off center, I used to do it a lot. Follow the mfr.'s recomendation, change the intial X drill point to the desired value and post away. It works great!

 

Hope this helps.

[PKrogman]

I am talking about core drills I found out to get the output,I need to define a boring operation.

 

Thanks for all the help

[Jean-Simon]

In the 2nd parameter page of the drill operation, you have drill point x and z you can put in, moving the x will do a boring.Is this what you mean? HTH! Welcome to the forum!

 

Simon

[PKrogman]

when i use the driil function it moves to the defined drill point but the post outputs the point the X0

[cblythe3d]

What is the best way to define a core drill(insert drill) can i make the output have the drill dia. this will force the surface speed?

 

Insert drills present a unique problem as there are two non symetrical tips and a complex form at the bottom of the hole if not drilled through.

 

For a practical workaround draw a line from deepest Z point (use c/l drill) to shallowest Z point (use o/d drill). I know that this is not technically correct (there is a xxxx in the center from a insert drill) however the resultant form pretty well shows the remaining stock.

 

Core drills are another issue. With a pre existing hole as in pre drill or castings these deep DOC inexpensive reamers remove stock quickly and efficiently with a minimum tendancy to follow perhaps off center holes.

 

Try the drill point calculator. Enter od, taper angle (usually 45 deg) and face (tip) diameter, select add to depth for good results.

 

If you want to core out existing holes at max efficiency e-mail me [email protected] and I will send you .MC9 file of my insert core drill

that has balanced, symetrical pockets, using low cost trigon inserts, that makes short work of balanced boring a start hole at lowest posible cost.

 

Charlie

These guys keep laughing at me at the auto parts store. Had to draw them a picture. I used to have a round thing that had 710 on a pipe on my valve cover. They turned the picture around 180 deg, and keep laughing at me. Rude to say the least.

[Leif Johnson from MICO Inc]

I do almost all of my roughing with insert drills. I usually draw my insert drills like a drill, but define them like a boring bar. The top of the drill is at X0 & the front of the drill is at Z0. When I do the initial drill cycle, just set the X value to the radius of the drilled hole. After that, start roughing. The tool needs to be comped like a boring bar in the machine, but G96 will work.

 

Leif