| 摘要 |
<p>The proposed punching machine (10) incorporates a press arm (18) being carried by a column (20) and suspended over a work surface (14), which is optionally provided with a block (16). The machine has a structure which at one end is rigidly joined to the base (12), and consists of a support column (24) and a pivotable cross arm (26) oriented perpendicularly towards the press arm (18). For automatic determination of the stroke end point and the force exerted on a punching tool on the block (16), the press arm is provided with means (40) interacting with one or several electric contacts (64) which are connected to the motor pump unit of the machine, and are fixed to the top side (18') of the press arm.</p> |
