Squeezer flanger
AssigneeThomassen & Drijver-Verblifa N.V.
InventorWillem P. Post
Life of this patent
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Abstract
To prevent fold formation when arranging a circumferential flange and a circular constriction adjoining the same, the material of the sleeve body is locally arrested under a sufficient clamping force between the inner and outer segments of a deformation device.
Claims11
A method of manufacturing a sleeve body having an outwardly directed circumferential flange arranged at the side of an open end and a circular constriction adjoining the same by pressing a substantially cylindrical sleeve body near one opening thereof along the entire circumference with the aid of a plurality of radially inwardly and outwardly movable outer segments, the form of the inner surface of which corresponds with the form to be imparted to the constriction, at the same time on all sides inwardly against an inner support, the diameter of which can be reduced, characterized in that the inner support, the form of the outer surface of which at least partly matches that of the inner surface of the desired constriction, is loaded by a spring force having a radial, outwardly directed component, which exceeds the force required for the radial narrowing of the sleeve body, but which is smaller than the radially directed force by which the outer segments are pushed inwardly.
A device for manufacturing a sleeve body having at least at one open end an outwardly directed circumferential flange and a circular constriction adjoining the same, said device comprising a support for a sleeve body, outer segments radially movable inwardly and outwardly and together exhibiting on the inner side the form of the desired constriction, inner segments radially movable outwardly and inwardly having an outer surface at least partly identically equal to the inner surface of the outer segments and driving members for inwardly and outwardly moving the two kinds of segments, characterized by spring means for loading the inner support, the form of the outer surface of which at least partly matches that of the inner surface of the desired constriction by a spring force having an outwardly directed, radial component, which exceeds the force required for the radially directed narrowing of the sleeve body, but which is smaller than the radially directed force of the driving means urging inwardly the outer segments.
Dependencies are inferred from the claim text.