Apparatus for the external calibration (sizing) of tubular eleme

Details Apparatus for the external calibration (sizing) of tubular eleme Apparatus for the external calibration (sizing) of tubular eleme

1977-11-03

1979-12-25

Gilden, Leon

Metal deforming

By three or more coacting relatively movable tools

Concurrently actuated tools

72367, 72452, B21D 4100

Patent

active

041799151

ABSTRACT:
An apparatus for the external calibration (sizing) of tubular elements such as longitudinally welded large-diameter pipes, comprises an outer support ring, a wedging mechanism connected to this ring, and a plurality of pipe-engaging calibrating elements which are closed against the external surface of the pipe as the latter is drawn through the apparatus to impart the desired external diameter thereto. According to the invention, the outer support ring forms a cylinder within which an annular piston is displaceable, the piston being formed with surfaces inclined to the axis of the pipe and acting directly or indirectly upon the pipe-engaging elements.

REFERENCES:
patent: 3303681 (1967-02-01), Le Fieli
patent: 3362212 (1968-01-01), Steele et al.
patent: 3370451 (1968-02-01), Scheutz
patent: 3417598 (1968-12-01), Valente
patent: 3461710 (1969-08-01), Luedi et al.

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