| 摘要 |
<p>The machine comprises two groups of three servomechanisms (26, 26a; 14, 15; 17, 18) arranged to operate along three directions perpendicular between each other, the first servomechanism (26, 26a) displacing longitudinally the free rail (2) with respect to the fixed rail (1), the second servomechanism (14, 15) displacing vertically the end of the free rail (2) and the third servomechanism (13) displacing said end transversely with respect to the end facing the fixed rail (1). The three servomechanisms enable to bring said end in a correct welding position without manual handlings of the rail.</p> |
