Production of threaded metal rods for making U-bolts

Details Production of threaded metal rods for making U-bolts Production of threaded metal rods for making U-bolts

1989-06-02

1990-06-26

Combs, E. Michael

Metal deforming

By use of roller or roller-like tool-element

With work-forcer offset from, and relatively movable...

10 11R, B21K 174, B21D 908

Patent

active

049361317

ABSTRACT:
Elongated straight cylindrical metal rods are threaded along opposite end portions, and the cylindrical outer surface of the center portion of each rod is marked to form a visual indicator of the longitudinal center of the rod. The straight rods are successively inserted into a rod bending machine having a mandrel with a mark indicating the center plane of the bending operation. The mid-point mark on each rod is aligned with the center plane mark on the machine, and the rod is bent to form a precision U-bolt. Preferably, the mark identifying the center of each rod extends circumferentially around the metal rod and is formed by a stripe of color contrasting ink directly on the rod or on a label attached to the rod to provide a permanent mark which does not require rotating the rod to find the mark.

REFERENCES:
patent: 238848 (1881-03-01), Bulley et al.
patent: 398912 (1889-03-01), Thomson
patent: 3821887 (1974-07-01), Bennett
patent: 3918286 (1975-11-01), Whitehead
"Tooling Trick Raises Tool Life", Lovell, Oliver Iron & Steel Corp., Feb. 1948.

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