| 摘要 |
<p>A punching apparatus is provided with a tool holder that has integral upper and lower arms. The upper and lower arms are provided with punches and dies, respectively. In one form, a smaller punch and die set is spaced longitudinally behind a larger punch and die set and laterally offset in a direction toward the work sheet clamps. In another form, the smaller punch and die set is spaced longitudinally forward in a direction toward the work sheet clamps and laterally offset from the larger punch and die set. The tool holder is extendable longitudinally and laterally to accurately align either the large punch and die set or the smaller punch and die set beneath a striker. In one form, the upper arm is recessed closely adjacent the smaller punch to reduce interference with the work sheet clamps. In both forms, the tool holder can also be extended further to a tool changing position.</p> |
