Reishauer Ag

Thomas Keller

Daniel Cölestin Dimitri Rabadzijev

The invention relates to a device for monitoring the contact of a workpiece () or tool on a spindle () of a machine tool, which device has a contact surface () for the workpiece () or tool. At least one measurement nozzle () is arranged in the region of the contact surface in order to produce a fluid flow directed away from the contact surface (). Upstream of the measurement nozzle, the fluid flow is conducted through a vacuum nozzle, which can comprise a jet nozzle () and a collector nozzle (). When the fluid medium flows through the vacuum nozzle, the vacuum nozzle produces a negative pressure in a negative pressure chamber (). A pressure sensor () or pressure switch senses a measurement pressure (p) in the negative pressure chamber.

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Gossau, Switzerland

Thomas Keller