Abstract: A method of using a tool for punching orifice that has wall surfaces extending at an angle relative to a generally planar surface of a workpiece. The method includes sequentially forming two spaced apart impressions formed in the workpiece between first and second generally planar surfaces spaced apart along a longitudinal axis of the workpiece. The two spaced apart impressions form a first orifice wall surface disposed at an obtuse angle with respect to the generally planar surface facing the tool and a second orifice wall surface disposed at an acute angle with respect to the generally planar surface, and coincidental with the punching process, a retention arrangement that secures the workpiece during the forming of the orifice.

Abstract: A bend fixture for bending metal sheet includes a stationary platen, a hinged platen, and a hinge associated with the hinged platen. Each platen includes an exterior surface portion for supporting a metal sheet; an interior surface portion spaced from the exterior surface portion; and a slanted surface portion between the interior and exterior surface portion. The exterior surface portions of the platens are initially separated by a gap. Rotating the hinged platen about the hinge narrows the gap and causes the slanted surface portions to approach each other. A clamp above each platen supports the metal sheet adjacent the platens as the hinged platen is rotated. Bending metal sheet with the claimed bend fixture avoids surface galling associated with prior art sheet bending techniques relying upon interaction between a punch and a die.

Abstract: A double-lanced suspension for use in progressive-die forming methods. The suspension is characterized by a rim section of lesser expanse between pairs of connecting tabs than is used in the prior double-lanced suspension.