National Research Development Corporation

Basily B Basily

Dennis H Sansome

Gerald M Jones

Clifford G Price

Mihir K Das

Stephen A Tobias

A method of shearing a workpiece, for example a metal billet or bar, and apparatus for carrying out that method. Before being subjected to linear shear, the billet is first subjected to substantial torque about an axis perpendicular to the plane of shear. The billet is held by two pivoting arms, the predominant torque of the first stage of the method is achieved by allowing the pivot points of the arms to slide as the arms turn, and the predominant shear of the second stage is then achieved by arresting that sliding movement by stops. The parts of the arms which grip the workpiece may bear against a fixed surface during the whole operation, so holding the axis of the workpiece to a constant location.

Method and apparatus for shearing metal billets

A load-measuring device, comprising a ring to be interposed between two opposed bodies coaxial with the load axis. Circumferentially-spaced projections separate one axial face of the ring from one of the bodies, and similar but angularly-staggered projections separate the other axial face from the other body, so that when the bodies approach under load the ring is distorted to an undulating shape. The distortion may be measured by a set of strain gauges fixed to the axial faces of the ring, and the output of a second set of gauges fixed to the radial faces of the ring may serve to compensate for distortions of the ring caused by things other than axial thrust, e.g. temperature variation. The projections may be fixed to the ring, or fixed to and located by the ring casing so that they bear against the ring in use.

Growing community of inventors

Cairo, Egypt

Basily B Basily