| 摘要 |
<p>The disclosure herein describes an apparatus and a method for cutting, eroding, welding or depositing metallic or non-metallic materials by means of an electric arc which is made to rotate by submitting it to a rotating magnetic field; the path of at least one end of the arc is controlled by automatic means in order to vary at will the speed of rotation of the arc and the radius, i.e. the distance of the route of the arc to the center of rotation, in order that this route sweeps a surface, the shape of which can be rectangular, circular, elliptic or any other.</p> |
