Cut flat surface 5 axis

[Mcam Nut]

Im away from the office so cant post a screenshot of the part we are machining, but basically the part looks like a round top hat with a top diameter of 8" with a 10 deg tapered flange at the bottom of the diameter, so the angle from the wall to the flange is 100 deg. There are also 3 o-rings on the od. Our machine has a max tilt angle of 90 degrees, so I cant use a swarf toolpath with the side of the tool, instead I will have to use the end of the tool, and probably a 5 axis curve. My problem is getting the endmill to cut the surface flat, with the end of the endmill being angled to the center. I could just surface the face, but was wondering if there may be a formula to set the lead angle to compensate for the end angle of the endmill? I was also thinking a endmill with a flat end, like a c'bore tool would probably work, are these available? The other issue I have is with the o-rings, I would like to tilt my head to 90 degrees and cut them with a endmill, they have a 16 surface finish, and no corner fillets, I could use a small endmill with a stepover, but think a endmill the same width of the slot would give a better finish, if I could get it to cut flat in the center. any suggestions would be appreciated.

[MrFish]

Im away from the office so cant post a screenshot of the part we are machining, but basically the part looks like a round top hat with a top diameter of 8" with a 10 deg tapered flange at the bottom of the diameter, so the angle from the wall to the flange is 100 deg. There are also 3 o-rings on the od. Our machine has a max tilt angle of 90 degrees, so I cant use a swarf toolpath with the side of the tool, instead I will have to use the end of the tool, and probably a 5 axis curve. My problem is getting the endmill to cut the surface flat, with the end of the endmill being angled to the center. I could just surface the face, but was wondering if there may be a formula to set the lead angle to compensate for the end angle of the endmill? I was also thinking a endmill with a flat end, like a c'bore tool would probably work, are these available? The other issue I have is with the o-rings, I would like to tilt my head to 90 degrees and cut them with a endmill, they have a 16 surface finish, and no corner fillets, I could use a small endmill with a stepover, but think a endmill the same width of the slot would give a better finish, if I could get it to cut flat in the center. any suggestions would be appreciated.

 

 

If I am understanding what you are trying to achieve, can I suggest that you do some investigation into mill turning of cams/crank shafts as that is how they do it with a offset cutter to produce a almost flat suface on the face of the cam.

[Mcam Nut]

That is what I am trying to figure out. I think I can tilt my spindle to produce a flat surface, just wondering if there is a formula to calculate the angle