Controlled tightening of screw connection with screwing unit

摘要

The method for the controlled tightening of a screw connection with a screwing unit, the lamping angle (alpha) of which and its tightening torque (Md) are measurable and adjustable as well as representable as a tightening characteristic curve (Md=f(alpha)). A retightening angle (alphaN) is set and determined by a resulting final tightening torque (MD emd 1,2,3). The position (L1-3) of a selected tolerance range (T) of the final tension torque (Md end 1-3) is determined depending on the friction value of the screw connection during the screwing operation.