face grooving 304L for 32 finish

[mlanders]

Hello,

I'm having trouble getting the required 32 finish on the inside corners of a
1.365-1.685 face groove with a depth of Z-.104.

The material is 304L stainless.

Using a .118 wide Iscar face groover (.010 radius corners).to rough and a . 079 face groover (.005 radius corners)
(these are my only choices).

The finisher is doing great on the sides and floor of groove but I'm getting a
slight chatter on inside corners.

Working with .0005 to .001 ipr feed.
300-350 sfm. I tried up to 400 sfm but the problem worsened.

I've used several tool paths but still have'nt found the right combo.

Any suggestions are much appreciated.


By the way - I am glad I found this site, it looks great.

Thanks again!

[cam1]

Hi: In general when chatter ocurrs, you have 3 choices:
1. Up the feedrate
2. Drop the speed
3. Do both

How much material are you leaving to finish?
What kind of a toolpath: Plung rough and finish with a single sweep (feed tool into Z on ID wall, face outwards and retract on Z at OD wall?)

regards

[mlanders]

Hi,
Thanks for the advice.

When I had the most luck I was leaving .005 on each surface.

The toolpath was :1)radius corner and plunge at ID 2)radius corner and plunge at OD then feed in X down to ID and feed out to Z.015

That seemed to work best-

Thanks again-

ML