Patent ID: 6050124
Filing Date: 2000-04-18
Classification: B21D

Abstract:
A transfer feeder having a pair of feed carrier groups, each group arranged parallel to the other and comprising a plurality of feed carriers coupled together in a workpiece feed direction, a cross bar extending across a pair of such feed carriers opposed to each other, and a feed and a lifting drive means for moving the feed carrier groups two-dimensionally, the transfer feeder transferring workpieces carried by the cross bar into each of successive work stations in a press machine wherein:said feed drive means comprisesa feed lever adapted to be swung for moving said feed carrier groups in a workpiece feed direction,a cam drive means comprising a feed cam adapted to be rotated in mechanical synchronism with an operation of said press machine by power taken out of said press machine,a switching means associated with said feed cam and said feed lever for coupling them together and decoupling them from each other,a servo drive means comprising a servo controllable feed motor for swinging said feed lever, anda clutch means disposed between said feed motor and said feed lever for coupling them together and decoupling them from each other,said switching means and said clutch means being adapted to be actuated to render one of said cam drive means and said servo drive means selectively operable to swing said feed lever.