13-8 Annealed Condition - Machinability?

Started by neurosis, May 11, 2023, 05:42 AM

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neurosis

May 11, 2023, 05:42 AM
We machine quite a bit of this stuff heat treated to H1000. It's fairly nasty shit to machine but we do ok with it.

We haven't machined this stuff in an annealed condition. Anyone have any experience with this?

I assume it's going to be super gummy and tough. This has been one application that I don't trust the speeds and feeds recommended by HSMAdvisor.  :D  I suspect that we can get away with much higher surface footage? 

We have some rather large blocks that are going to lose a lot of weight prior to heat treat. If we weren't removing so much material we would just heat treat them first.

Anyone give any hints on what to expect?
I'll go back to being a conservative, when conservatives go back to being conservative.

crazy^millman

#1
May 11, 2023, 06:04 AM
Pretty much nailed it. Might look to a High Pos High feed cutter if you have a 50 taper I would look to a 4" or 6" cutter.
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neurosis

#2
May 11, 2023, 07:02 AM
Quote from: crazy^millman on May 11, 2023, 06:04 AMPretty much nailed it. Might look to a High Pos High feed cutter if you have a 50 taper I would look to a 4" or 6" cutter.

I'm planning on using IMCO 9flt end mills to do some of the roughing. I'll take some test cuts so see what kind of sfm I can get away with.

We do have some Ingersoll Pos High Feed Mills that I'll be using as well. 

The roughing is being done on a 50 taper OKK VM76R. 



I'll go back to being a conservative, when conservatives go back to being conservative.

gcode

#3
May 12, 2023, 06:24 AM
Quote from: neurosis on May 11, 2023, 07:02 AMOKK VM76R. 

We have exactly the same machine.. with a Big Plus spindle and high pressure coolant
We did an Inconel project on it a few months ago.
I used an Ingersoll Ø3", 8 flute high feed (5M5P-30R01)
I programmed thru spindle high pressure coolant, but the operator wouldn't use it cause it would be "messy"
I finally made him use it and it wasn't messy and it doubled the insert life.
I also bought 2 identical face mill arbors and 2 cutter bodies as the operator could swap out the tool
and change inserts offline. That saved about 15 minutes per hour of spindle time
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neurosis

#4
May 12, 2023, 06:29 AM
Quote from: gcode on May 12, 2023, 06:24 AMWe have exactly the same machine.. with a Big Plus spindle and high pressure coolant

These machines are a labor to set up.. lol. You practically have to climb inside.

OKK's high pressure coolant pumps are the best.
I'll go back to being a conservative, when conservatives go back to being conservative.

gcode

#5
May 12, 2023, 07:04 AM
Quote from: neurosis on May 12, 2023, 06:29 AMThese machines are a labor to set up.. lol. You practically have to climb inside.

Yes they were designed by a back surgeon (trying to drum up business)
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