| 摘要 |
A machine tool is provided for forming apertures in a structural steel member or other workpiece of extended dimension. A workpiece clamp engages the workpiece and moves it along a support into and out of a work station. A selected work tool such as a punch die set is mounted on a carrier, and is moved by the carrier into a pre-selected position at the work station. Power means such as a ram operate the punch die set to form the desired apertures. In several embodiments, the carrier comprises a turntable which can be rotated to move the work tools into and out of the work station along an arcuate path.
|
