Metal deforming – Tool and/or tool holder – Including flexible or yieldable tool or support
Patent
1998-10-28
2000-07-11
Larson, Lowell A.
Metal deforming
Tool and/or tool holder
Including flexible or yieldable tool or support
B21D 903
Patent
active
06085572&
ABSTRACT:
A tube bending mandrel is provided, which is designed to avoid stress, fracture, and disassembly caused by forces exerted while a tube is bent. The mandrel includes mandrel links with a ball end, neck, and socket end, formed from two opposing and matching link sections. A radial tenon protruding from the face of one link section fits into a corresponding radial mortise formed in the face of the opposing link section. A detent mechanism includes a ball slot formed in the exterior of a ball end, a circular spring that fits into that ball slot, and a socket groove formed in the interior of an adjacent socket in which the ball end fits and rotates. By providing a ramp on one edge of the socket groove or the ball slot, the circular spring tends to move into the socket groove and ball slot, to assume a straight position after the mandrel has been removed from a bent tube. An external shoulder is provided on each socket, adjacent to the socket opening, to support a ball segment.
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McGuire, Sr. Samuel B.
Siebert Jeffrey A.
Gould Linda Flewellen
Larson Lowell A.
Tube Bending Cocepts, Inc.
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