Patent ID: 6341515
Filing Date: 2002-01-29
Classification: B21D,Y10T

Abstract:
An apparatus for forming two plates into a hollow workpiece, the apparatus comprising:a pair of dies together forming a cavity and having edge regions adapted to be pressed together in a direction against outer peripheries of the plates; an outer element in the edge region of one of the dies adapted to rotate therein about an axis generally parallel to the direction; an inner element set in the outer element and pivotal therein about an axis generally parallel to and offset from the outer-element axis, the inner element being formed offset from the respective inner-element axis with an axially throughgoing feed passage aligned with a feed hole in the plate engaging the one die; and means for forcing a fluid under pressure through the passage and hole into a space between the plates and thereby deforming the plates away from each other in the direction while displacing the hole perpendicular to the direction with rotation of the outer element in one sense and rotation of the inner element in an opposite sense for movement of the passage in a straight line perpendicular to the direction.