Method and apparatus for testing of the shut-down behavior of the expanded grenz controlled power screwdrivers

摘要

Method for testing the shut-down behavior of the expanded grenz controlled power screwdrivers, comprising the steps of:Coupling of the power take-off of a power wrench with a shaft and actuation of the power wrench such a way that the latter the shaft rotates;The exertion of a continuously increasing braking force on the shaft in such a way that the from the power wrench to overcome the braking force continuously increases the torque exerted;Detecting the torque exerted on the shaft and the angle of rotation of the shaft;Controlling the increase in the braking force in such a way that the differential quotient between the increase of the torque and the increase of the angle of rotation a predeterminable constant first value;Switching of the braking force control upon reaching a predetermined torque and / or angle of rotation to a flatter rise, in which the differential quotient has a predeterminable second value, which is smaller than the first value.