Hi all,
I have an unusual part, that I think is makeable, but am having a hard time wrapping my head around exactly what the code will look like. Maybe one of you can help?
The part has a bore, about 3/4" diameter. In that bore I need 2 helical grooves, 180 degrees apart, with a pitch of .8 revolutions per inch.
I don't think a keyseat or threadmill type cutter will work because of how steep the helix pitch is. The grooves need to end up about an 1/8" deep radially, and about 2" deep in the bore. What I've been thinking I would do is grind a piece of HSS (to the shape and angle of the groove) to basically use like a threading tool on the lathe. What I'm hoping to do though, is to put this in my mill (Haas VF), and the use something like a rigid tapping cycle. I'd do it in .010" (radial) depth increments. Here's where it gets tricky. I don't want to pull the cutter further out of the holder with each pass. I want to keep using a predictable spindle orientation, and do helical interpolation to make the groove deeper (in XY) in subsequent passes.
Is there a way to incorporate XY motions into a haas rigid tapping cycle? Is there another way to set spindle orientation, do a helical interpolation op, and pull the tool to the middle, back to clearance Z level, and do it again with a larger radius? I included a sketch of the part.
I haven't found a good way to do this in my CAM software (rhinocam or Fusion360)...
Thanks in advance!
Bernie
I have an unusual part, that I think is makeable, but am having a hard time wrapping my head around exactly what the code will look like. Maybe one of you can help?
The part has a bore, about 3/4" diameter. In that bore I need 2 helical grooves, 180 degrees apart, with a pitch of .8 revolutions per inch.
I don't think a keyseat or threadmill type cutter will work because of how steep the helix pitch is. The grooves need to end up about an 1/8" deep radially, and about 2" deep in the bore. What I've been thinking I would do is grind a piece of HSS (to the shape and angle of the groove) to basically use like a threading tool on the lathe. What I'm hoping to do though, is to put this in my mill (Haas VF), and the use something like a rigid tapping cycle. I'd do it in .010" (radial) depth increments. Here's where it gets tricky. I don't want to pull the cutter further out of the holder with each pass. I want to keep using a predictable spindle orientation, and do helical interpolation to make the groove deeper (in XY) in subsequent passes.
Is there a way to incorporate XY motions into a haas rigid tapping cycle? Is there another way to set spindle orientation, do a helical interpolation op, and pull the tool to the middle, back to clearance Z level, and do it again with a larger radius? I included a sketch of the part.
I haven't found a good way to do this in my CAM software (rhinocam or Fusion360)...
Thanks in advance!
Bernie