- Jul 21, 2013 at 10:07 am #1305626Troy AmmonsBPL Member
Worked with a lot of different sheet metals in the past, but never with Titanium sheet.
Question is how do you guys cut drill etc. Talking clean cuts clean drill holes etc.
I assume for drilling, slow with cooling and with a ti or cobalt coated drill. Cutting is really where I am lost. I have some good sheet metal shears but not sure they have hard enough blades.
Thickness will be typical for windscreen, pot holders, wood stove etc.
Also any sources for sheet stock ??
ThanksJul 21, 2013 at 11:08 am #2008054peter vaccoMember
@fluffinreach-comLocale: no. california
it will cut with std metal shears. the stuff's annoying, not indestructable.
but, it is a beetch to drill.
cobalt. yes. and might as well get a set of real domestic cobalt drills, not just coated. premium drills are cheaper anyway if your time has any value.
you can cut titi also with a muffler cutter. this is a handy handy handy little air powered thing that cuts most anything.
if only having a bit to whack, you can use a dremel tool and it's assorted cutting/slotting discs.
twist drills do not do well in larger sizes of thin metal. the step-drill (uni-bit) format helps in this regard.
you may have to sandwich the thin material between something more real to get a nice hole.
it thee hast an angle grinder (and who doesn't) then they sell .040" slotting wheels that cut frikk'n Everything (excpet like.. carbide). note : 040" wheels can shatter in the hands of new/novice workers. i will not issue them to apprentices. but if you wear gloves, and a face shield, you'll be safe enough. you'll get a nicer edge grind cutting than shearing. you have to deburr it anyway.
sheet titi can be had from that global source of All that is Good .. McMaster Carr. you'll need a commercial account to buy from them. for some, that can be a bugger.
perhaps, prototype your designs in something easier in the beginning.
in the realm of buying tools. i just buy what i need. screw the cost. and it consistently ends up being cheaper than any form of thrift.Jul 21, 2013 at 12:09 pm #2008090Jon FongBPL Member
@jonfongLocale: FLAT CAT GEAR
Sources – Ti Goat has a good selection of 0.005" thick Ti sheets. You can get some reasonable Ti tubing on eBay through Tiger Metals.
Cutting – Hand shears work fine, I've even used a paper cutter. Notching tools don't work so well. For thicker Ti, cut off blade work fine, but they can leave a little slag.
Holes – Good luck. Thin Ti can be a pain as the thinnest relative to die clearance makes it difficult. It is best if you can punch hole away from the edge, a couple of diameter gap will help.
JonJul 21, 2013 at 1:47 pm #2008137Colin KrusorBPL Member
@ckrusorLocale: Northwest US
Titanium Joe (google this) is a good source I've used. As others said, standard tin snips work well for cutting Ti foils. Heavy scissors will cut anything thinner than 0.005", but you'll dull them. I've found that a dremel cut-off wheel works well for making slots, deburring, and shaping edges. A sharp paper punch will make clean holes. A sheet metal punch will only make clean holes if the foil is 0.005" or thicker and a brittle alloy like 15-3-3-3. A sheet metal punch will just deform the foil and the hole will be jagged if it is a softer CP alloy. Punching and cutting with the dremel has produced much cleaner results for me than drilling.
I made this little wood stove with 0.005" 15-3-3-3 alloy Ti foil from ebay, using a Harbor Freight sheet metal punch and dremel cut-off wheels:Jul 21, 2013 at 2:41 pm #2008156Roger CaffinModerator
@rcaffinLocale: Wollemi & Kosciusko NPs, Europe
Oh, Ti is fun. With the right tools, it is nice tio work with, IF you know the rules.
Rule 1: Ti work hardens. Cut aggressively, don't fool around.
Source: Titanium Joe – cheaper than most any others. Wide range too. No account needed.
Drilling: slow speed and push. Good HSS is fine, but you must be aggressive. Coolant is not essential, but a drop or two of oil helps.
Cutting: depends on thickness. For 0.8 mm sheet some HEAVY snips work OK. Heavier than that gets harder. Carbide is good for machining – but be aggressive.
Choose your alloy carefully.
For really hard stuff, 6Al-4V is great, but it does not bend! It cracks. Unless you bring it up to a dull red, then it bends nicely.
For bending applications, use CP (Commercially Pure), and allow some radius to the bend. This machines a bit more easily too.
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