| 摘要 |
<p>The invention relates to a method and a device for lubricating tool and workpiece at cutting and forming, especially fine blanking of a workpiece with a thickness of 5 mm or more and with complex part geometry from a flat strip. The invention has the task to further develop a method and a device for lubricating a tool and a workpiece at cutting and forming, especially at fine blanking of workpieces, so that fine blanking of thicker parts is reproducible controlled process secure with high quality and at the same time extended edge life of the tools by lubricating the active surfaces up to the forming zone without the provided lubricating film breaking off. This task is solved in the manner that from the stocked up cutting oil one quantity is accumulated in a micro-surface structure of a functional surface of shearing punch and cutting die and evenly distributed on the functional surfaces as quasi-stationary cutting oil film by cooperation of moving past each other functional surfaces, when the tool is closed, and that one quantity of accumulated cutting oil via the respective effective gaps is provided to the active surfaces of shearing punch and workpiece in the forming zone.</p> |
