Expanding head for pipe end enlarging tools

Details Expanding head for pipe end enlarging tools Expanding head for pipe end enlarging tools

1977-11-23

1979-05-15

Larson, Lowell A.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

B21D 4102

Patent

active

041540832

ABSTRACT:
An expanding head for pipe end enlarging tools which have a tool body including a cylindrical end portion and a removable mandrel having a tapered end extending through the cylindrical end portion of the body and axially movable therein. The expanding head comprises a plurality of exchangeable segmental expanding elements each having a flange segment which together form a radially outwardly extending annular flange. The segments are connected together to unite them as a self-contained set and for radial movement in response to axial movement of the mandrel when in use. The segments are connected by a spring element which surrounds the segments at the annular flange and clamps them against each other and against the mandrel. The segments are removably connected to the cylndrical portion of the tool body without detachment of the spring element to maintain the segments in the self-contained set. This removable connection is carried out by a sleeve connectable to the cylindrical portion of the tool body coaxially with the mandrel and having an inwardly extending annular flange positionable behind the annular flange of the segments to coact therewith to mount the segments in position around the mandrel.

REFERENCES:
patent: 366644 (1907-09-01), Green
patent: 888239 (1908-05-01), Kelly
patent: 907396 (1908-12-01), Passat
patent: 3385087 (1968-05-01), Huth
patent: 4034591 (1977-07-01), Rothenberger

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