Punching a workpiece
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 25, 2019
Grant Date -
May 18, 2017
app pub date -
Jan 27, 2017
filing date -
Jul 28, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
This disclosure relates to methods and apparatuses for punching workpieces. A punching tool is configured to move during a punching stroke along a stroke axis towards a workpiece to be punched. The punching tool is configured to move away from the punched workpiece during a return stroke. The punching tool includes first and second components configured to be coupled hydraulically for concurrent movement along the stroke axis. The punching tool includes a punching drive for moving the first component along the stroke axis. The punching apparatus is configured to move the second component relative to the first component at a first transmission ratio during the punching stroke. The punching apparatus is configured to move the second component relative to the first component at a second transmission ratio in response to a reaction force of the workpiece exceeding a threshold value of the punching drive during the punching stroke.
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