Punch press transfer mechanism

摘要

A workpiece (W) transfer assembly (10) is provided for a progressive die type punch press. The assembly (10) includes a first crank bar (28) driven to oscillate about a first rock shaft (24) by the press ram, and a second crank bar (36) driven to oscillate about a second rock shaft (32) by the press ram. A horizontal linkage (40) extends between the first crank bar (28) and a workpiece engaging jaw (18). A vertical linkage (42) extends between the second crank bar (36) and the horizontal linkage (40). A linear bearing (48) interconnects the vertical linkage (42) and the horizontal linkage (40). A plate (44) having a vertically elongated slot (46) disposed therein is attached to the horizontal linkage (40). The first crank bar (28) extends through the slot (- (48) -) +G (46) +) and thereby imparts motion to the jaw (18). The combination of elements allow horizontal jaw ( 18) movement into and out of engagement with the workpieces (W), and lost motion transmission in the vertical direction for raising and lowering the jaw (18) relative to the stations.