let me clear the problem,
i want to press a material with press machine where the puncher is an eight-shape.
my problem is, the puncher is stuck with the material and the punch holder cannot hold the puncher. (the holder and the puncher is press-fitted). I assume that the contact pressure...
thread404-151892.
http://www.eng-tips.com/viewthread.cfm?qid=151892&page=6
according to the thread link above.
i found that formula which given by desertfox is for circular inner body and circular outer body.
my question is, what if the outer body is not circular. For example, i want to press...