Device combination for the metered forwarding of a coupling medium in a coupling medium contact chamber, an ultrasound generating screwing tool, for prestressing force controlled screwing in series production

摘要

The invention, according to the main claim, relates to a device combination 14, which end of the drive shaft 13 of a screw 10 is installed and an ultrasonic transducer 18 so, in conjunction with a metering device 15, a coupling medium 15 'in response to a coupling medium annular channel 26 and a metering 34th in an adjoining coupling medium contact chamber 36 between an ultrasonic transducer 18 and a screw head 19 'can be conducted wetting, which received during Verschraubungsendanzugs the screw head penetrating ultrasonic waves 18' after reaching the expanding screw shaft as time-shifted echo pulses 18 '' again - and in one Measuring controller 22, in conjunction with a measuring cable 22 ', can be evaluated.