Method and apparatus for arc butt welding
First Claim
1. A method of joining two parts by an arc butt welding process, comprising the steps of striking an arc between the two faces to be joined, moving the arc over the faces by means of a magnetic field, relatively moving the two faces in a plane generally parallel to the faces such that the overlapping area of the two faces changes during the arc-heating period, so that the magnetic field and the relative movement constrain the arc roots to move over substantially the whole of each face, and then bringing the faces into registration and applying forging pressure across the said faces.
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Accused Products
Abstract
In arc butt welding the arc is moved between the faces of the parts to be joined by a magnetic field. In order to insure the arc travels over the whole of the faces to be welded the parts are moved generally parallel to the faces so that the overlapping area of the faces changes during the arc heating.
13 Citations
14 Claims
- 1. A method of joining two parts by an arc butt welding process, comprising the steps of striking an arc between the two faces to be joined, moving the arc over the faces by means of a magnetic field, relatively moving the two faces in a plane generally parallel to the faces such that the overlapping area of the two faces changes during the arc-heating period, so that the magnetic field and the relative movement constrain the arc roots to move over substantially the whole of each face, and then bringing the faces into registration and applying forging pressure across the said faces.
- 9. Apparatus for joining two parts by arc butt welding comprising means connecting the said parts to opposite poles of a power supply, means for forming an arc between faces of the said parts to be joined, means generating a magnetic field whereby the arc is caused to move over the said faces to be joined, and means whereby the faces are given a relative movement in a plane generally parallel to the faces such that the overlapping area of the two faces changes during the arc-heating period, the magnetic field and the relative movement constraining the arc roots to move over substantially the whole of each face, and means for bringing the said faces into registration and for applying forging pressure across the faces.
Specification