Abstract: A tabbing tool for reducing residual tab burrs on parts punched from a generally flat sheet metal piece (50) includes a punch portion (10) and a die portion (32). The punch portion includes a first punch face (24) that extends at a shallow angle and a second punch face (26) that extends at a greater angle. The die portion includes a recess (38) bounded by a straight edge (40). The recess is further bounded by a first die surface (42), a generally vertically extending second die surface (44) and a third die surface (46) that extends at the shallow angle. In operation a tab (58) which extends between a part portion (60) and an external portion (62) is deformed between the punch and die portions of the tabbing tool to compress and thin the tab adjacent to the part portion and cause the tab to extend into the recess in the die portion. Upon defining the contour of the part by punching openings in the piece, the part is removed by shaking the piece.

Abstract: A backgage (22) for use in conjunction with a press brake (10), includes an arm (24) movable in three axial directions (R, X, Z) by a drive (26). A gage block (54) is supported on the arm and includes a gage finger assembly (72) including a movable finger (76). A projecting member (94) engages a recess (100) in the finger to releasably latch the finger in a first position. Excessive force encountered by the finger during a collision with an obstruction unlatches the finger and enables it to move to avoid damage.