Jump to content

Welcome to eMastercam

Register now to participate in the forums, access the download area, buy Mastercam training materials, post processors and more. This message will be removed once you have signed in.

Use your display name or email address to sign in:

First time in A286


kunfuzed
 Share

Recommended Posts

Long story short, getting about one cutter per part. Removing maybe 16 cu inches of material, if that's any sort of helpful metric. Basically just roughing a grab rib with a raptor dovetail on it (sorry the video doesn't show the whole thing) Anyways, used an Optirough set to HEM, at 200 sfm, .0012 chip load, at a factor of 2.67 yielding 4000rpm at 120ipm. 2x Dia step down at 7% step over for a 1/2" GARR V4-R.

 

Should I be getting better tool life, or is that just the nature of the beast?

 

What other cutters, or parameters would you recommend? I think I'm pretty close to man specs.

 

https://youtu.be/oKxPrEQ0POo

Link to comment
Share on other sites

anything 3/8 and under= coolant, and lots of it.

big depth and lite radial.

 used an 1.25" dia HF on an aero. clevis in a lathe. Seemed to work well dry. Coolant was roughly equal, IIRC.

still beat up inserts faster than any tool steel.

didn't run enough parts to get any kind of exhaustive test, grain of salt.

Link to comment
Share on other sites

use a decent cutter, not Garr ! Best cutter I ever used on this stuff was a silmax HM118 a few years back. Not sure if they are available where you are.

 

also looks like you have the cutter in a sidelock holder, which will equal run out and bad cutter life due to one flute working harder. try using a high precision collet style holder - Albrecht ones are great.

  • Like 1
Link to comment
Share on other sites

use a decent cutter, not Garr ! Best cutter I ever used on this stuff was a silmax HM118 a few years back. Not sure if they are available where you are.

 

also looks like you have the cutter in a sidelock holder, which will equal run out and bad cutter life due to one flute working harder. try using a high precision collet style holder - Albrecht ones are great.

I will see if the boss will let us try some different cutters. I would really like to.  Our supplier likes to push Garr, so that's what we  have, and they stocked up on a bunch of them...

 

Yes that was an EM holder, but we also do have an Albrecht APC-14 (love those) holder we were running the ones with no flat in.  I was under the impression that at these relatively slow spindle speeds an EM holder would be fine, but could obviously be wrong.  Unfortunately no better luck with the milling chuck.

Link to comment
Share on other sites

No.  These are 4 and 5 flt.  I thought high flute counts were pretty much just for finishing?

 

Was my thoughts also, but on hard metals where you want tool life the 4-5% step over with the correct chip load per tooth is pretty amazing what you can do. We had one project where we saved many hours using these tools verses inserted or even the traditional 4-5 flute endmills. Yes the endmills are not cheap, but with the saving with one customer and the part per day requirements it came out much cheaper and more productive than previous methods and efforts.  

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.

Join us!

eMastercam - your online source for all things Mastercam.

Together, we are the strongest Mastercam community on the web with over 56,000 members, and our online store offers a wide selection of training materials for all applications and skill levels.

Follow us

×
×
  • Create New...