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Old 10-02-2013, 09:21 PM   #481 (permalink)
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Quote:
Originally Posted by tjd10684 View Post
TITANIUM SUCKS

that is all
My experience:
If you are milling a small cutter engagement and high feed have always been my friend. Your cutters will wear faster but they won't break nearly as often.
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Old 10-02-2013, 09:27 PM   #482 (permalink)
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I have read the same thing but I was reaming out a barrel for a customer so I did not have a lot of choices but to run brand new dead sharp HSS tools and now they are dead Well not dead dead but they need sent out for resharpening.
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Old 10-02-2013, 10:05 PM   #483 (permalink)
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Well then in that case I'd say try to control your heat. But it sounds like you are done now.
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Old 10-02-2013, 10:10 PM   #484 (permalink)
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ya Im done. I found that a mix of water based coolant + cutting oil + air blast + small pecking depth was the best combination. even with all of that as soon as the tool started actually cutting you could hear the water coolant instantly start to boil and it smoked like a tire fire due to the sulfur based cutting oil.
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Old 10-02-2013, 10:12 PM   #485 (permalink)
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What do you mean ti sucks?
I loved working with it. Easy as can be.
What are you doing to it?
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Old 10-02-2013, 10:15 PM   #486 (permalink)
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Old 10-02-2013, 10:21 PM   #487 (permalink)
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What do you mean ti sucks?
I loved working with it. Easy as can be.
What are you doing to it?
Maybe your the person to ask then. I have turned some Ti before and it was not nearly as tough as this was, as I remember it was similar to SS when turning. Maybe a different grade? If I had to wager the stuff I worked with before was grade 2. Maybe the barrel is grade 5 (Ti-6Al-4V)
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Old 10-02-2013, 11:33 PM   #488 (permalink)
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Please don't suffer send your scrap Titanium to me I have a bit but haven't tried to cut it yet. I hear its kinda springy so you got to just dig in and go?(doesn't like light cuts) I tried to use a old piece of cast early 1900's, window counterweight for a serpentine spindle pulley that darn crap was hard as hell dirty and unpredictable. I had almost conquered it when I noticed the teeth were off by .0085 each (ops) This stuff was so hard and dirty it literary ground down my hss parting tools instantly they would barely scratch it. I parted it with the grinder (fun). In the end the stainless steel I ended up using felt like butter in comparison. O yea I got the brushless servo spindle drive working 2 to 1 in high gear and 3.33 to 1 in low gear final ratio so assuming the treadmill motor hits 3200 rpm I should get 1600rpm at spindle:| sure beats 500 though.
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Old 10-03-2013, 01:12 AM   #489 (permalink)
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Day 3:

This used to be clear yellow:

The parts soak in that for a while and then get the gunk scrubbed off with one of those yellow/green sponges. They get dunked in water and then dried, but after drying I noticed a slightly gritty film. Wonder if it needs another soak in water with some dish soap and a scrub with a second clean brush before a final rinse. Just kind of winging it at this point.

All I had left to get off of the carriage:


It's now all off and soaking. Hoping that breaks up the gunk in the joint of the last small part I can't get off. Not to mention the gunk everywhere else on it.

Have around 5-6 hours into the cleaning so far. Happy with my progress, just hope I don't get stuck somewhere and the project stalls.

Have to figure out a painting plan soon.
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Old 10-03-2013, 04:19 AM   #490 (permalink)
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i did aerospace grade ti. dont remember the grade but only remember seeing 3 different headings on the paperwork under material. and i think two of them were specific brand ti's. id have to look at a list, id recognize it if i saw em again. all our cuts were .003 deep minimal and never used HSS on it only carbide. and only new inserts. they would last awhile to. if the insert or em was dull forget it though, it'd chip apart. needed to be sharp as hell and you wouldnt have a problem all day. that was key.
our coolant for ti was the same as all our stainless. 312, 314, 347. again all aerospace stuff. i could be mixing some stuff up as it been awhile too.
i had to run lots of inconel parts and id take ti over that stuff anyday.
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