Cutting Inconel info needed please

[cadcam]

Any one have a site with some surface feet for inconel 718.

 

thanks folks

[jctjct]

I can quote Machinery's Handbook. Milling, turning, drilling? HSS or carbide?

[Fralex_francois]

HTH

[Hardmill]

What kind of tools you using Jay??

 

PEACE

[cadcam]

jctjct, milling and drilling.

 

Colbolt drills,colbolt roughers coated,Carbide finshers.

 

thanks both of you.

[Storkman]

SLOW..........

 

Actually Carpenter calls it Pyromet 718 but doesn't give any recommended speeds and feeds.

[Storkman]

Cutting speeds and feeds are in the following ranges: Drilling: Steady feed rates must be used to avoid work hardening due to dwelling of the drill on the metal. Rigid set-ups are essential with as short a stub drill as feasible. Heavy-duty, high-speed steel drills with a heavy web are recommended. Feeds vary from 0.0007 inch per rev. for holes of less than 1/16" diameter, 0.003 inch per rev. for 1/4" dia., to 0.010 inch per rev. for holes of 7/8"diameter. Slow surface speed, as 8-10 feet/minute, are best for drilling. Milling: To obtain good accuracy and a smooth finish it is essential to have rigid machines and fixtures and sharp cutting tools. High-speed steel cutters such as M-2 or M-10 work best with cutting speeds of 5 to 15 feet per minute and feed of 0.001"-0.004" per cutting tooth. Grinding: The alloy should be wet ground and aluminum oxide wheels or belts are preferred. From Fralex link.

[cadcam]

I was using 20 fpm and .004 chipload.

 

I am going to go back at 10FPM and .004 chipload.

Tool is wareing fast.

[cadcam]

it's looking like more bit at this FPM of RPM 126

Feed 1 inch

[Threept82]

Open unspecified_uploads in the FTP site above

then download MEConsultant20.Zip unzip it and go to High Temp Alloys(Nichol base).

That's what Inonel-718 is.

[Storkman]

Pretty tough stuff to mill.

[cadcam]

THREEPT82 , thanks getting it now.

[Guest CNC Apps Guy 1]

You gotta cut a chip though. .004 - .006

 

I've used Kennametal Kyon 2000 @800 SFM w/ a .005 CPT on that nasty stuff. The inserts are pricey but your cycle time gains are well worth the expense. Yeah I know, I know, those look like aluminum munbers but I was not a believer until I tried it myself on 718 @ 245 BHN

[Kevin Goddard]

James, did you want to hit the estop the first time that Kyon got into the part? The fireworks are scary, I thought there would be only a nub of the holder left after the first pass. Pretty impressive if you can use it.

[mrainey]

James,

 

I had a friend who got similar numbers some years back turning jet engine components. He was using some of the early "whisker-reinforced" stuff from Greenleaf (sp?). It's hard to believe until you really see it.

 

On the other end of the scale, I've seen 50" waspaloy rings being turned with C2 carbide, with the spindle literally barely turning and programmed insert indexes every half hour or so (LONG cycle times).

 

Stuff like this makes our kind of work interesting.

[Threept82]

I run cobalt drills @ 20 sfm and .0025 chip

carbide end mills 70 spm .003 chip per tooth

stub tools peck-drill center drills to max

allowable dia.s

I cut Inco, Invar, Kovar. Titanium .... all the

time and this seems to work best for use.

[Guest CNC Apps Guy 1]

quote:

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...James, did you want to hit the estop the first time that Kyon got into the part?...

---

Lemme put it to you this way... If I had a piece of coal in my back pocket, I could have given my wife a healthy diamond after that first pass. LOL!!!

 

That's my story and I'm sticking to it.

[EZ3PUTT]

James, We had a Kennametal rep in a shop I used to work at one day while cutting the 718. He ran out to his car and came back with a Kyon 2000 insert. He gave us speeds and feeds and the programmer and I looked at each other like he was crazy. We even made him push cycle start. The @$$ hole pucker factor was way up there but it was awesome. I still keep an insert in my box just to see people shake their heads when they feel how light it is compared to carbide.

[cadcam]

You guys are great. thanks alot.

quote:

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Invar, Kovar

---

It has been years but I used to cut that stuff.I actully remember likeing it.

[Chris Rizzo]

quote:

---

On the other end of the scale, I've seen 50" waspaloy rings being turned with C2 carbide, with the spindle literally barely turning and programmed insert indexes every half hour or so (LONG cycle times).

 

Stuff like this makes our kind of work interesting.

---

I worked there for a few summers while in school. (Upstate NY) Oh yeah, insert life left alot to be desired...especially cutting thourgh forging scale on that waspaloy.

[Brendan P]

I have used the Kyon 2000 and 2100 button inserts.

Great for ruffing the mtl. off.

I always call them 'plastic inserts'

Make sure you finish you part with carbide.

[Storkman]

Do you guys have a web site for those inserts? I wanna check them out. We are machining some Jethete forgings that are tearing up inserts.

[Brendan P]

The ones that we use are kennametal

RNG45 KY2100 KYON button inserts

[Storkman]

thanx Brendan