| 摘要 |
The required heat is generated by an electric arc. The heat generated by the electric arc is conducted through at least a portion of the connection piece (4) and caused to melt a brazing metal (5) provided between the connection piece and the metal surface (7). The heat conducting portion of the connection piece (4) prevents direct contact between the electric arc and the metal surface (7) and the brazing metal during melting thereby preventing disadvantageous thermal actuation of the metal surface (7). When the current to the electric arc has been disconnected, a mechanical force is applied to the heat conducting portion of the connection piece (4) pressing the latter against the metal surface (7). A portion of the brazing metal (5) underneath is thereby pressed out under the remaining joint-forming surfaces of the connection piece also. |
