| 摘要 |
<p>The present invention concerns a method for making open tubular profiles of precious metal. It calls for the use of a backing profile 1 of nonprecious material, having the shape of a plate with at least one protrusion or lengthwise rib 11 at one surface, arranged at a predetermined distance from one edge. On the opposite flat surface there is placed a sheet 2 of precious metal whose width is sufficient to allow at least a partial winding around the edges of the backing profile 1. The assemblage is then subjected to working by plastic deformation, which produces the bending until one obtains a bimetallic tube, inside which is inserted solder. Subsequent operations of drawing make it possible to bring the tube up to the predetermined dimensions and shape. <IMAGE></p> |
