Method and apparatus for making a collar to the end of a pipe
AssigneeT-Solutions Oy
InventorEero Leppänen
Life of this patent
Estimating the term…
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
A method for making a collar to the end of a pipe (8), comprising:
- positioning a collar making apparatus which comprises an attachment clamp (7) surrounding the pipe (8), at a distance from the end of the pipe which corresponds to the width of the collar to be formed, the collar making apparatus comprising a body part (1), to which is connected by hinging a pivoting cradle in the shape of a fork and 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, the cradle being 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;
- moving the forming cone (9) 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;
- then, pivoting, the forming cone by means of the pivoting cradle outwards from the central axis of the pipe (8), around the inner edge of the attachment clamp (7), and at the same time making the forming cone (9) and pipe (8) rotate with respect to each other around the central axis of the pipe;
- and, continuing the pivoting and rotating movements 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, wherein the body part (1) is connected to the attachment clamp (7) in such a way that the axis of rotation of the pivoting cradle determined by the pivots (5) runs in the direction of the tangent of the pipe (8), through the center of an imaginary circle determined by the corner radius between the collar (8′) to be formed and the inner surface of the pipe.
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) 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, a face (7′) of the attachment clamp forming a back stop for the collar being formed, wherein:
- 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 the collar is to be formed, which is attached to the attachment clamp, are able to rotate with respect to one another around the longitudinal axis of the pipe;
- 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, 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, wherein the pivots (5) are located in such a way that the axis of rotation of the pivoting cradle determined by them runs in the direction of the tangent of the pipe (8), essentially through the center of an imaginary circle determined by the corner radius between the collar (8′) to be formed and the inner surface of the pipe (8).
Dependencies are inferred from the claim text.