Metal deforming – Tool and/or tool holder – Including flexible or yieldable tool or support
Patent
1994-12-19
1996-04-02
Crane, Daniel C.
Metal deforming
Tool and/or tool holder
Including flexible or yieldable tool or support
72296, 72370, B21D 903
Patent
active
055029973
ABSTRACT:
A gripper and mandrel assembly for a tube bender, particularly a bender of the stretch type. At least two gripper jaws close about an end of a tubular workpiece when actuated by the cone portion of a slideable shaft. The same shaft has a cable and ball type mandrel extending outwardly from its distal end. During a stroke of the shaft from the DISENGAGE to the ENGAGE position of the assembly, the shaft both drives the mandrel into the workpiece and also causes the jaws to close about the end of the tube. When in the ENGAGE position, the distal end of the shaft is inside the tube in order to prevent the gripper jaws from deforming or otherwise causing excessive damage to the workpiece end. An abrasive coating partially covers the inner surface of the recess of the gripper jaw that contacts the outer wall of the workpiece in order to insure a firm grasp of the workpiece by the gripper jaws. A tube bender would have at least two assemblies, one to grasp each end of a tubular workpiece.
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Boettger John M.
Guliuzza, Jr. Frank
Carrier Corporation
Crane Daniel C.
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