Metal deforming – By relatively movable offset tool-faces – With tool motion in fixed path
Patent
1995-09-18
1997-04-01
Jones, David
Metal deforming
By relatively movable offset tool-faces
With tool motion in fixed path
723896, B21D 7022
Patent
active
056155727
ABSTRACT:
A hydraulic tube bender comprises a hydraulic cylinder adapted to cause a mandrel to reciprocate along a longitudinal axis in a first plane in which two forming dies are stationed on either side of the axis. A pneumatic cylinder coupled to the axles of the forming dies and applies torque through a tether and pulley system to the forming dies. As the tube engages both the mandrel and the forming dies, resistive pressure in the pneumatic cylinder applies torque to the forming dies to hold them against the tube during the bending operation. A clamp may be applied to the tube to keep it snug against the mandrel as the forming dies rotate along the sides of the tube during bending. The torque system applies continuous pressure to the tube and permits bending of extremely thin walled tubing such as titanium aircraft tubing without wrinkling.
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Catalog, Imperial Eastman, pp. 198-201,215,216 (1987).
Hundley Sydney C.
Johnson Harry F.
Hunjohn, Inc.
Jones David
Manning Guy V.
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