Pipe cage end forming machine and method

Details Pipe cage end forming machine and method Pipe cage end forming machine and method

1975-01-20

1976-06-22

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With modification or control of temperature of work, tool or...

140107, 83559, 72 80, 72205, B21F 3300, B21B 500

Patent

active

039642852

ABSTRACT:
The specification discloses apparatus and a process for forming the female or bell end of welded wire reinforcing cages, particularly cages of the type used to reinforce concrete pipe. A cylindrical wire cage assembly is automatically centered and positioned within the apparatus and the bell end is formed by elongating one or more of the circumferential wires at one end of the cage. A force is applied between two points on the circumferential wires to simultaneously expand the wires and rotate the cage. A heat source is applied to a localized zone between the two points on the wire. The heat source and wire are moved relative to each other such that the heat zone moves along the wire as the force is applied. The wire is stretched under the force being applied to thereby continuously reduce the diameter of the wire and elongate the wire as it is moved relative to the heat source.

REFERENCES:
patent: 478670 (1892-07-01), Welch
patent: 3644695 (1972-02-01), Shuey et al.
patent: 3847005 (1974-11-01), Criner

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