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View Full Version : ~OT? Crazy wood turning on lathe - pattern matching - could it work for metal?



PStechPaul
10-21-2014, 02:57 AM
Could something like this be done for metal? Basically like a toolpost grinder or milling head, using a contour model and cutting metal instead of wood? Enjoy!


https://www.youtube.com/watch?v=9qt5ui3P9QA

Puckdropper
10-21-2014, 10:15 AM
End mills are very similar to router bits, I wouldn't be surprised to find there's a few of the spiral cutters that are sold as both an end mill and router bit.

His design still follows the basic duplicator principals, there's a pattern, some kind of pointer that controls a cutter, and a cutter. You can really see this on a manual key copier.

I could probably make one that'll fit the design of my Taig quite easily. The trickiest part will be figuring out where to mount the pattern so a pointer mounted on the cross slide could index on it. Since the work is already turning, a standard tool bit would be the way to go for the cutter.

DR
10-21-2014, 10:52 AM
Yes, it can and is being done with metal on CNC machines. There was a link within the last year or so on PM.

Rosco-P
10-21-2014, 01:23 PM
Yes, it can and is being done with metal on CNC machines. There was a link within the last year or so on PM.

No need for CNC, this can be done on a manual pantograph or tracer mill. Same is true for a lathe with hydraulic tracer attachment. The guy on YouBoob has invented....nothing.

Gary Paine
10-21-2014, 01:57 PM
No need for CNC, this can be done on a manual pantograph or tracer mill. Same is true for a lathe with hydraulic tracer attachment. The guy on YouBoob has invented....nothing.

Creative use of MDF and hardwood rails to achieve what appeared to be very decent 2 axis mobility. The unit appeared to be pretty heavy, though, with a powerful motor and it's weight all bearing down on the router bit except for what he was able to manually constrain. I fully expected to see router bit shrapnel fly.

brian Rupnow
10-21-2014, 04:03 PM
I wonder if they still have the tracer lathe with the coke bottle in it down at the Royal Ontario Museum in Toronto. It was down there 30 years ago.---Brian

DR
10-21-2014, 07:25 PM
No need for CNC, this can be done on a manual pantograph or tracer mill. Same is true for a lathe with hydraulic tracer attachment. The guy on YouBoob has invented....nothing.

The one shown for metal on a CNC was a vertical spindle "turning" the rotating work piece. The tip of the cutter was at work center line. It was being promoted by a tooling company, they contended there was some advantage to their tooling over conventional lathe turning. Possibly longer life than a turning insert doing the same part (I don't recall). It would give small chips from stringy material I suppose.

wierdscience
10-21-2014, 11:34 PM
Reminds me of the Bost crankshaft machine-

http://youtu.be/YCoHkl75-Dc?list=PLNwq4E_Rfx8aFP2Crxjj9cv9FKKJU3ccO

Don't know if that is turn milling or rotary turn broaching,but man look at the metal removal rate:D

JoeLee
10-21-2014, 11:48 PM
End mills are very similar to router bits, I wouldn't be surprised to find there's a few of the spiral cutters that are sold as both an end mill and router bit.

His design still follows the basic duplicator principals, there's a pattern, some kind of pointer that controls a cutter, and a cutter. You can really see this on a manual key copier.

I could probably make one that'll fit the design of my Taig quite easily. The trickiest part will be figuring out where to mount the pattern so a pointer mounted on the cross slide could index on it. Since the work is already turning, a standard tool bit would be the way to go for the cutter. Like this one.............

JL...................

http://i911.photobucket.com/albums/ac317/JoeLee09/My%20Plug%20Cutter/My%20Pistons/Welding%20Problem/Unusual%20End%20Mill/Image001.jpg (http://s911.photobucket.com/user/JoeLee09/media/My%20Plug%20Cutter/My%20Pistons/Welding%20Problem/Unusual%20End%20Mill/Image001.jpg.html)
http://i911.photobucket.com/albums/ac317/JoeLee09/My%20Plug%20Cutter/My%20Pistons/Welding%20Problem/Unusual%20End%20Mill/Image006.jpg (http://s911.photobucket.com/user/JoeLee09/media/My%20Plug%20Cutter/My%20Pistons/Welding%20Problem/Unusual%20End%20Mill/Image006.jpg.html)
http://i911.photobucket.com/albums/ac317/JoeLee09/My%20Plug%20Cutter/My%20Pistons/Welding%20Problem/Unusual%20End%20Mill/Image007.jpg (http://s911.photobucket.com/user/JoeLee09/media/My%20Plug%20Cutter/My%20Pistons/Welding%20Problem/Unusual%20End%20Mill/Image007.jpg.html)

Toolguy
10-22-2014, 11:39 AM
That's a compression endmill, made for cutting laminates where both side need a clean cut so as not to delaminate. Both top and bottom surfaces are pulled towards the middle during the cutting process. That way each side is supported by the core of the material. The part where the cutting edges change direction is positioned in the middle of the sheet.