FlatBeltBob
Stainless
- Joined
- Jul 22, 2007
- Location
- central WI
This may be a question for the abrasive machining area , but lets see if you guys can help first ..
I am having trouble with a reaming operation on my Cnc mill .
I am reaming a DOM tube that is .735 ID to .766 and feeding @ 6 ipm /450 rpm.
Last time I ran this job at 12 ipm with no problems , but this batch of tube is slightly smaller .
The problem is that I am getting a built up edge fused to one of the flutes , and almost trashed the tool a few times . Looking at the reamer , it looks like the flutes are not very
deep and I am thinking that the chips do not have a free flow to curl out .
Should I try to grind the flutes deeper ( at least at the cutting end ).
I already have the set up on the cutter grinder to sharpen the tips , so a thin gashing wheel would not be a big deal to change to . Maybe grind a small radius at the bottom of the flute?
Other things I tried so far : very rich coolant mix / change drill cycle to a wood peck routine , to break the chips ( helps a bit ) added a pre drill , tool chg, fin ream routine ( too slow ) . Any advice appreciated .. I have to do a 2,500 part run asap .
Thanks
FBB
I am having trouble with a reaming operation on my Cnc mill .
I am reaming a DOM tube that is .735 ID to .766 and feeding @ 6 ipm /450 rpm.
Last time I ran this job at 12 ipm with no problems , but this batch of tube is slightly smaller .
The problem is that I am getting a built up edge fused to one of the flutes , and almost trashed the tool a few times . Looking at the reamer , it looks like the flutes are not very
deep and I am thinking that the chips do not have a free flow to curl out .
Should I try to grind the flutes deeper ( at least at the cutting end ).
I already have the set up on the cutter grinder to sharpen the tips , so a thin gashing wheel would not be a big deal to change to . Maybe grind a small radius at the bottom of the flute?
Other things I tried so far : very rich coolant mix / change drill cycle to a wood peck routine , to break the chips ( helps a bit ) added a pre drill , tool chg, fin ream routine ( too slow ) . Any advice appreciated .. I have to do a 2,500 part run asap .
Thanks
FBB