Abstract: The aim of the invention is to accomplish a new configuration or a reconfiguration of a screw system. To this end, a control unit (12) detects the actual components, which are installed in a screw system, as well as their characteristics, and said control unit (12) subsequently determines differences between the actual components and specified components that, for a specified configuration, were selected from a database (15), in which all available components are stored with their specific characteristics. Finally, actual and specified components that differ from one another are displayed on a display (16).

Abstract: The aim of the invention is to accomplish a new configuration or a reconfiguration of a screw system. To this end, a control unit (12) detects the actual components, which are installed in a screw system, as well as their characteristics, and said control unit (12) subsequently determines differences between the actual components and specified components that, for a specified configuration, were selected from a database (15), in which all available components are stored with their specific characteristics. Finally, actual and specified components that differ from one another are displayed on a display (16).

Abstract: A socket assembly for an ultrasound-controlled screwing device has a coupling for rotary connection of a screw connection with a screw spindle, an electrical conducting element for electrically conducting connection between the screw connection and the socket, and the electrical contacting element having an electrical conductor which is held in a springy way against the socket.

Abstract: The screwdriving device (9) according to the invention has a control device (22) which uses a sensor system (18) to determine a characteristic variable (K) which characterizes a screwdriving moment (Mv) of the screw connection (10) and/or an emitted moment (M) of the impact screwdriver, during or after at least one pulse emission from the impact screwdriver to the screw connection, and defines a drive variable, for example a required drive speed (n) for the next impulse emission, as a function of the determined characteristic variable (Ki). In this case, the drive variable (n) is initially set to a value which corresponds to a value (K0) to be expected of the characteristic variable (K) and its magnitude is in any case less than a desired value (Kreq) for the final screw connection state. This prevents the desired screwdriving moment being exceeded even after the first impulse emission in the event of unfavorable screwdriving conditions.

Abstract: A method for tightening a screw utilizes a power-impact or pulse driver. The prestressing force in the screw to be tightened is increased step-by-step during the tightening operation and evaluated. By detecting the prestressing force in the screw on a step-by-step basis, the step heights pertaining to the increase in the prestressing force and the change in the step heights are used as criteria for the screw-coupling quality and for controlling the screw-coupling operation. In the same way, the number of impacts or pulses is also used as a criterion for the screw-coupling quality and for controlling the screw-coupling operation.