---
publication_id: "OT-2026-000003017"
title: "Method for tightening screwed connections, multi-screwing device"
published_at: "2026-09-15T19:16:46.595635Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000003017"
categories:
  - "manufacturing-assembly-equipment/assembly-systems"
keywords:
  - "b23p19/06"
  - "b23p19/067"
  - "b23p19/069"
  - "b23p19/069"
  - "b23p19/04"
  - "b23p19/06"
---

# Method for tightening screwed connections, multi-screwing device

## Abstract

Method for tightening screwed connections by means of a multi-screwing device having a 5 first and a second screwing tool (20), each having a rotary drive (45) for screwing an exchangeable bushing on and off, means for longitudinally straining a threaded bolt (5), and a tool for retightening the nut (6). The screwing tools (10, 20) can be moved at right angles relative to the tool axes by means of an actuating drive (60a, 60b). At one point in time, the exchangeable bushing of the first screwing tool (10) and the exchangeable bushing of the D second screwing tool (20) are simultaneously screwed onto a threaded bolt. There then ensues: a) unscrewing the exchangeable bushing (21) of the first screwing tool (10) from the threaded bolt and raising the first tool; 5 b) by means of the actuating drive (60a, 60b), moving the first relative to the second screwing tool into a position in which the tool axis (A10) of the first screwing tool (10) is in alignment with the screw axis (A) of a further threaded bolt (5); J c) lowering the screwing tool (10) and screwing it onto the further threaded bolt; d) longitudinally straining this threaded bolt; e) repeating steps a) to d). 5 (Fig. 4) 2021201216 25 Feb 2021 0 ensues: 5 0 25 3/7 20 21 20 12 16 2 5 Fe b 20 21 50b O 2021201216 25 Feb 2021 060b 50a 0 61 45 45 20 61 30 70 10 O 62 : : 0 606 b 62 A20 0 20 5 70 3 6 Fig. 5 4 A