METHOD FOR TIGHTENING SCREW CONNECTIONS, MULTIPLE SCREW DEVICE

The invention relates to a method for tightening screw connections by a multi-screwing device. The multi-screwing device includes first and second screwing tools, each with a rotary drive for screwing an exchangeable bushing on and off, a mechanism for longitudinally straining a threaded bolt, and a tool for retightening the nut. The screwing tools are moved at right angles relative to tool axes by an actuating drive. When bushings of the first screwing tool and the second screwing tool are both screwed onto a threaded bolt, these steps are performed: a) the bushing of the first screwing tool is unscrewed from the threaded bolt and raised; b) the first screwing tool is moved relative to the second screwing tool into a position in which the tool axis of the first screwing tool is aligned with the screw axis of a further threaded bolt; c) the first screwing tool is lowered and screwed onto further threaded bolt; d) the threaded bolt is longitudinally strained; and e) steps a) to d) are repeated. 本发明涉及用于借助多重旋拧装置