Procedure for manufacturing corrugated tubes

Details Procedure for manufacturing corrugated tubes Procedure for manufacturing corrugated tubes

1993-07-08

1995-03-14

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

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

72393, B21D 1506

Patent

active

053967895

ABSTRACT:
A procedure for manufacturing corrugated tubes includes providing an outer mold arranged to envelop a region of a tube to be deformed. The outer mold includes a plurality of flat annular elements capable of being displaced in a radial direction. A counter-mold is situated in the interior of the tube. The counter-mold includes identical and independent parts, radially displaceable simultaneously between an end position in which the independent parts are applied against the walls of the tube to cooperate with the pressing action of the annular elements of the outer mold to an opposite end position in which the independent parts are remote from the walls, allowing the corrugated tube to be removed from between the outer mold and the counter-mold.

REFERENCES:
patent: 1939065 (1993-12-01), Kruse
patent: 3726121 (1973-04-01), Arnold et al.

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