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Dynamic in Haynes 188


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#1 K2csq7

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Posted 15 February 2012 - 11:29 AM

Hola Commrades,

Got a job coming up with 18 windows; .770 X 3.015 w/ .325 rads in the 4 corners.
Through an .080 wall about 6" up off the table (turned part, I will have a cap on the top while milling for added support). It will be a 3+2 setup on a very old machine. Max RPM is about 2k. Max backfeedrate = 50 IPM. (and that's pushing it)Posted Image


When your all done laughing I'd like some suggestions  Posted Image!

I am planning on using a 5 fluted 5/16" Supermill at about 100 SFM & .001 CPT (to start with).
Plunging into a predrilled hole for entry.
I've got a .046 stepover in there now, and a toolpath radius of .050 (Dynamic Area). Filter = 1:1 total tolerance = .004, leaving .006 / side for finishing.

We have a similar job with more but smaller windows that runs on that machine and was programmed a long time ago, it goes like this...
An entry hole is drilled at each end, then it just plows the endmill through the middle of the slot.
I know I will have excellent tool life, but would like to get the cycle time for the roughing down from the current backplot time of 10 mins.

TIA for any suggestionsPosted Image

#2 TEEJAY

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Posted 15 February 2012 - 12:16 PM

good luck Kieth, We have some Haynes 282. I treat it like Rene. And to be honest, I havent had a lot of luck with dynamic toolpaths in this stuff. Seems plowing your way thru works better.It has less of a chance to fight back

#3 K2csq7

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Posted 15 February 2012 - 12:47 PM

I have used Dynamic on this stuff with good results in the past, but the amount of material to be removed was far less, and I was able to use Dynamic core as they were not closed chains. I've never seen the 282... maybe it's worse?

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When your all done laughing I'd like some suggestions

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good luck Kieth

You were suppossed to be done laughing before suggesting something!Posted Image
LOL, thanks Wes, I'll make up a plowing program to have as backup!

#4 TEEJAY

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Posted 15 February 2012 - 12:54 PM

282 is new. It turns 718 Inconnel into aluminum  ;)

#5 Jeremy Herron@DBS Solutions™

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Posted 16 February 2012 - 09:50 AM

Hey Keith,

We do it all the time, with your situation I would usually go with

1/4 hanita varimill 2 5 flute 125 sfm .0025 fpt (chip thinning applied) .025 stepover, I usually about 120 mins in cut in haynes 188

or

3/8 hanita varimill 2 5 flute 145 sfm .0028 fpt (chip thinning applied) .0375 stepover, I usually about 60-90 mins in cut in haynes 188


HTH.


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#6 K2csq7

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Posted 16 February 2012 - 01:54 PM

Thank you sir!