| 摘要 |
Positioning of two sheet blanks (15, 16) to be butt welded, comprises placing one of the blanks (15) against a reference thrust block (12), by displacing it in a determined distance in the direction of this thrust block (12) by means of jaws (2, 6) closed on the blank in order to develop a clamping force (f), allowing a sliding of the blank (15) between them, until it comes into contact with the thrust block (12) and then augmenting the clamping force (p), of the jaws on the blank (15), after having travelled through the determined distance. The reference thrust block (12) is then retired and the other blank (16) is brought into contact against the first blank (15) following a similar procedure that brought the first blank (15) against the thrust block (12) by means of a second pair of jaws (3, 7).
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