| 摘要 |
<p>The invention relates to an apparatus for mechanically joining metal sheets, which lie flat one upon the other, by metal forming, having a tool set comprising at least one punch and one die which bounds a cavity in which the joining operation takes place, it being the case that at least one of these two tool parts can be driven via a driving force, produced by fluid supply, such that the punch displaces sheet-metal material out of a sheet-metal plane, and upsets it, under the action of deformation work, and the driveable tool part has a stop which is moved along with it and limits its penetration depth. For easy displacement limitation, it is provided that the stop is formed by a switching bolt which, upon reaching a selectable penetration depth, can be displaced against a switching linkage which can be brought into releasable latching engagement with a closing element of a valve which is arranged in the fluid supply and is intended for depth limitation, wherein the latching engagement is provided for maintaining a throughflow position of the valve, and the switching bolt is designed as a follower element, acting on the switching linkage, for disengaging the switching linkage from the closing element and switching the valve into a blocking position for the purpose of interrupting the fluid supply.</p> |
