rotary swaging 2

to swage long lengths of material

not uncommon but hard to do with a single stroke because dies would need to be very long

rotary swaging

dies incorporate CAMS at their far ends, which are actuated by a ring of cam followers located around the periphery

rotation of the ring of cams

results in the dies being simultaneously driven inwards and withdrawn outwards in radial reciprocating motion

feeding the workpiece through the center of the dies

it is possible to swage long work pieces in steps from one end to the other

same method used by firearms to create

cold ahmmer forged barrels for long guns

cold hammer forged barrels are ? mandrel used?

not forged they are rotary swaged and a twisted mandrel is used in the center to leave an impression for rifling inside the bore

the mandrel is removed

by pulling and twisting motions

the resulting grain flow

follows the contours of the barrel, bore and rifling grooves, and is very strong

not obvious thing that was made by swaging

screw driver - require strength and cutting grooves would round out when contacted with screw - no mandrel required since the screwdriver is not hollow

forging/swaging products produce

discrete components - and does so with dies that travel linearly