Metal deforming – By use of roller or roller-like tool-element – With work-forcer offset from – and relatively movable...
Patent
1993-09-30
1995-10-31
Larson, Lowell A.
Metal deforming
By use of roller or roller-like tool-element
With work-forcer offset from, and relatively movable...
72452, 72456, B21K 174, B21D 706
Patent
active
054618975
ABSTRACT:
A frame supports an interchangeable mandrel or die which receives the center portion of an elongated metal rod having opposite threaded end portions, and the rod is clamped to the die by a locking bar actuated by a hydraulic cylinder. The frame also includes a set of vertically spaced cross members connected by a pair of parallel spaced guide rods which support a carrier bar for vertical movement. The carrier bar pivotally supports corresponding end portions of a pair of arms each formed by parallel spaced plates, and each pair of plates defines slightly angled aligned cam slots. A pair of bending rollers are supported by the opposite end portions of the arms, and a hub member extends between the plates of each arm and supports rollers which engage the corresponding cam slots to provide for moving the arms and bending rollers along non-parallel converging paths for overbending the rod around the die. An elongated adjustment screw is rotatable supported by the lower cross member and extends between the plates forming the arms. The screw has oppositely threaded portions engaging the hub members to provide for convenient and precisely adjusting the spacing between the bending rollers for accommodating dies and rods of different sizes.
REFERENCES:
patent: 2918101 (1959-12-01), Riker
patent: 4446711 (1984-05-01), Valente
patent: 4696180 (1987-09-01), Zandel
patent: 4936131 (1990-06-01), Gray
Arctic Bend 35 Cold Forming U-Bolt Bender, Turner's Manufacturing-Turner's Alignment & Brake Service, Inc., Muncie, Ind.
Gray John C.
Shultz Duane E.
L & H Threaded Rods Corp.
Larson Lowell A.
Schoeffler Thomas C.
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