Procedure and apparatus for forming a rectangular collar at the

Details Procedure and apparatus for forming a rectangular collar at the Procedure and apparatus for forming a rectangular collar at the

1993-04-09

1994-09-13

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

Tool orbiting or rotating about an axis

72123, 72125, B21D 1904

Patent

active

053458010

ABSTRACT:
A procedure and an apparatus for forming a rectangular collar at the end of a pipe (16) shape the pipe using a forming element (8) which is moved in the axial direction of the pipe (16) towards the pipe (16) and rotated along the edge surface of the pipe end about the longitudinal axis of the pipe. In the procedure, a conical collar is first produced, whereupon the forming element (8) is moved in the axial direction of the pipe away from the pipe (16) and turned to a position where its forming face is substantially perpendicular to the longitudinal axis of the pipe, whereupon a rectangular collar is formed. The apparatus is provided with a turning device (15) allowing the forming element to be turned about its fulcrum (9) into a first position, where the surface of the forming element is at an acute angle to the direction of the longitudinal axis of the pipe and the forming element (8) is supported by a first bearing surface (13), and into a second position, where the surface of the forming element is substantially perpendicular to the direction of the longitudinal axis of the pipe and the forming element (8) is supported by a second bearing surface (14).

REFERENCES:
patent: 782005 (1905-02-01), Chandler
patent: 1436489 (1922-11-01), Ferrier
patent: 1775766 (1930-09-01), Holmes
patent: 4905492 (1990-03-01), Lobakk

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