| 摘要 |
A punching machine having a punching machine framework (7), a work plane (4) for work pieces (3), a handling assembly carried by said framework (7), a graduated workpiece checking bar (6) and a pair of workpiece-locking pincers (2) brought by said units (11) for each pincers (2), and a programme control unit (30), handling assembly, said graduated bar (6) being mobile in, and flush with a work plane (4), at least one pair of clamping the machine comprising a device (1) for automatic positioning each of the workpiece-locking pincers (2), including a slide member (9) for each pincer (2) slidably mounted on the said graduated bar (6), locking and retaining means (13) carried by said slide member (9) and locking means (10) arranged to lock and unlock said slide member (9) relatively to said graduated bar (6). <IMAGE>
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