Pipe end expanding or contracting device utilizing ironing

Details Pipe end expanding or contracting device utilizing ironing Pipe end expanding or contracting device utilizing ironing

1981-07-28

1984-07-03

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72370, B21D 2200

Patent

active

044571577

ABSTRACT:
A process and a device for expanding or contracting the end of a pipe are disclosed. First an ironing die or punch is put over or into the end of the pipe. Then the end of the pipe is expanded or contracted by a rod form expanding punch or a tube form reducing die. Then, with this punch or die still in place, the ironing die or punch is pulled over or through the end of the pipe, so as to pinch the wall of the pipe between itself and the punch or die, and thereby the wall of the pipe is ironed so as to release any strains that may have been caused in it by the expanding or contracting process. Thereby more accurate pipe ends can be formed simply and reliably.

REFERENCES:
patent: 3566662 (1971-03-01), Champoux
patent: 3908429 (1975-09-01), Gram
patent: 4164807 (1979-08-01), King

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