Edge rolling a cylinder for encapsulation force question
Edge rolling a cylinder for encapsulation force question
(OP)

As shown in my model (sectioned in half for explanation), using a die (current plan anyway), I need to roll this tube over on itself to encapsulate the contents.
The tube is made of 1010 steel .015" with .004" Cu plating.
Anyone out there a little more familiar with sheet metal able to help me at least ball park the amount of force I need to design the press?
Equations would be great.
Also... to calculate the length of tube to get the right amount to roll over, I just used two models (rolled and pre-rolled) and compared the masses until I got the right length with the same mass as the crimped one. Is that reasonable?
Figure the die will be acting collinear with the centerline of the assembly. The die will be tool steel (possibly carbide) pressing on the bronze plating.
Just some thinking on my part...
I'm guessing that friction between the die and part might be important so I looked that up. Friction coefficient of .16 to .36 depending on lubrication. I'm unsure if that is completely negligible/pointless when compared to the force needed to bend over the tube.
Thanks!





RE: Edge rolling a cylinder for encapsulation force question
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Edge rolling a cylinder for encapsulation force question
RE: Edge rolling a cylinder for encapsulation force question
RE: Edge rolling a cylinder for encapsulation force question
The tooling to do an axial swage is pretty simple.
Rotary swaging is also mature technology, capable of extreme deformation, beyond what you probably need.
Mike Halloran
Pembroke Pines, FL, USA
RE: Edge rolling a cylinder for encapsulation force question
http://en.wikipedia.org/wiki/Swaging
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Edge rolling a cylinder for encapsulation force question
Taking about cartridges, we used to make brass 25mm cartridge during the vietnam conflict, and we had a series of dies and heat treatment to make the finish product. Granted we started with brass tubing thicker that what you have.
In your case with thin wall tubing, your process will not be an easy task. I suggest that you you do trial and error tests.
RE: Edge rolling a cylinder for encapsulation force question
concerning the possibility of using an orbital riveting hype machine to resolve your problem. You could either buy the machine or contract the work. out The last time I checked there were a lot of these machines on the excess machinery market.
http://www.orbitforming.com/
RE: Edge rolling a cylinder for encapsulation force question