US 2013/0133390 A1Published application

Method and apparatus for making a collar to the end of a pipe

AssigneeT-Solutions Oy

InventorEero Leppänen

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Abstract

A method and apparatus for making a collar to the end of a pipe. The apparatus comprises an attachment clamp surrounding the pipe and a body part, connected by hinging to a pivoting cradle having a forming cone, which can enter the end of the pipe. In the method, the forming cone is moved axially and obliquely to the central axis of the pipe, inside the pipe until it contacts the inner surface of the pipe, the forming cone being loaded with the desired load pressure against the inner surface. The forming cone is then pivoted using a pivoting cradle outwards from the central axis of the pipe, around the inner edge of the attachment clamp, and the forming cone and pipe are simultaneously rotated with respect to each other around the central axis of the pipe until the desired collar has formed.

Claims9

Dependent claims

A method for making a collar to the end of a pipe (8), in which method is used a collar making apparatus which comprises an attachment clamp (7) surrounding the pipe (8), positioned at a distance from the end of the pipe which corresponds to the width of the collar to be formed, and a body part (1), to which is connected by hinging a pivoting cradle provided with a forming cone (9), which forming cone (9) can be taken inside the end of the pipe (8) to which the collar is to be formed, characterised in that in the method, the forming cone (9) is moved by an axial movement, obliquely to the central axis of the pipe (8), inside the pipe until the forming cone (9) makes contact with the inner surface of the pipe, making essentially linear contact with the inner surface of the pipe, and the forming cone (9) is loaded with the desired load pressure against the inner surface, the forming cone is then pivoted by means of a pivoting cradle outwards from the central axis of the pipe (8), around the inner edge of the attachment clamp (7), and the forming cone (9) and pipe (8) are at the same time made to rotate with respect to each other around the central axis of the pipe, and the said pivoting and rotating movements are continued until the desired collar (8′) has formed against the face (7′) of the attachment clamp at the end of the pipe, which acts as a back stop for the collar.

An apparatus for making a collar to the end of a pipe (8), which apparatus comprises a body part (1), a pivoting cradle connected to the body part in a pivoted manner, a forming cone (9) functionally connected to the pivoting cradle, the forming cone being arranged to be taken inside the pipe (8) to which a collar is to be formed, and an attachment clamp (7) surrounding the pipe, located at a distance corresponding to the width of the collar to be formed from the end of the pipe to which a collar is to be formed, the face (7′) of the attachment clamp forming a back stop for the collar being formed, characterised in that the body part (1) is connected to the attachment clamp (7) in such a way that the body part and the pipe (8) to which a collar is to be formed which is attached to the attachment clamp will be able to rotate with respect to one another around the longitudinal axis of the pipe;

that the pivoting cradle is made into the shape of a fork, comprising a pivoting cradle part (2) to which the forming cone (9) is connected in such a way that the forming cone can be moved towards the interior of the pipe (8) by an axial movement, and that the pivoting cradle part (2) is equipped with swinging arms (4) which are pivoted on the body part (1) in such a way that the pivots (5) are located at a point outside the pipe, while the body part is connected to the attachment clamp.

Dependencies are inferred from the claim text.