Method for screwing a locking ring onto a threaded bolt

1. A method for screwing a locking ring onto a threaded bolt, comprising:

threading a coupling device into a threaded bolt by driving the coupling device, for being threaded into the threaded bolt, in rotation by a rotary drive; and

screwing the locking ring onto the threaded bolt with a locking ring holder, wherein the threaded bolt is fixed by the coupling device, wherein the locking ring holder is driven in rotation by the rotary drive.

2. The method as claimed in claim 1 , wherein the locking ring holder is threaded onto the locking ring by being driven in rotation by the rotary drive.

3. The method as claimed in claim 2 , wherein in order to secure the locking ring during threading of the locking ring holder onto the locking ring, the coupling device is moved linearly until it is guided through the locking ring.

4. The method as claimed in claim 2 , wherein after the locking ring holder has been threaded onto the locking ring, the coupling device is moved linearly until the coupling device makes contact with the threaded bolt.

5. The method as claimed in claim 2 , wherein threading onto the locking ring comprises establishing interlocking engagement between the locking ring holder and the locking ring, and/or wherein threading into the threaded bolt comprises establishing interlocking engagement between the coupling device and the threaded bolt.

6. The method as claimed in claim 1 , wherein the locking ring holder has a bore for drawing in the locking ring using a negative pressure.

7. The method as claimed in claim 1 , wherein the rotary drive has a motor and a clutch arrangement for driving engagement of the motor with the locking ring holder and the coupling device so that only the locking ring holder is driven in rotation when the motor moves in a first direction.

8. The method as claimed in claim 7 , wherein only the coupling device is driven in rotation when the motor is moved in a direction which is opposite the first direction, and wherein the respective rotation directions of the locking ring holder and of the coupling device oppose each other.

9. The method as claimed in claim 1 , wherein after the coupling device has been threaded into the threaded bolt, the locking ring holder is moved linearly with the locking ring until the locking ring makes contact with the threaded bolt.

10. The method as claimed in claim 1 , wherein the threaded bolt is guided through connecting piece openings in connecting pieces, and wherein a tube arrangement runs around a bolt section which protrudes out of the connecting piece openings.

11. The method as claimed in claim 1 , wherein the coupling device is moved linearly by a linear drive.

12. The method as claimed in claim 1 , wherein the locking ring holder has an inner contour for fixing the locking ring, such that the inner contour forms a passage opening through which the coupling device can be moved.

13. The method as claimed in claim 1 , wherein a feed gripper grips the locking ring and positions the locking ring on a screw axis relative to the locking ring holder for threading in the locking ring holder.

14. The method as claimed in claim 1 , wherein the locking ring has a fastening part and a tear-off part and wherein the tear-off part is torn off from the fastening part when a tear-off torque is reached when the locking ring is being screwed on.

15. The method as claimed in claim 14 , wherein the fastening part comprises a threaded section with an internal thread, and has a spacer section.

16. The method as claimed in claim 15 , wherein a tear-off inside diameter of the tear-off part is larger than the thread inside diameter and/or larger than the spacer inside diameter.

17. The method as claimed in claim 14 , wherein a removal gripper grips the tear-off part and removes the tear-off part after the tear-off part has been torn off.

18. The method as claimed in claim 17 , wherein the tear-off part is released from the locking ring holder by the coupling device.

19. A screwing apparatus for screwing a locking ring onto a threaded bolt, comprising:

a rotary drive; and

a locking ring holder;

wherein the screwing apparatus is configured to thread a coupling device into a threaded bolt by driving the coupling device, for being threaded into the threaded bolt, in rotation by the rotary drive; and to screw the locking ring onto the threaded bolt with the locking ring holder, wherein the threaded bolt is fixed by the coupling device, wherein the locking ring holder is driven in rotation by the rotary drive.

20. A method for screwing a locking ring onto a threaded bolt, comprising:

threading a coupling device into a threaded bolt by driving the coupling device, for being threaded into the threaded bolt, in rotation by a rotary drive; and

screwing the locking ring onto the threaded bolt with a locking ring holder, wherein the threaded bolt is fixed by the coupling device, wherein the locking ring holder is driven in rotation by the rotary drive,

wherein the rotary drive has a motor and a clutch arrangement for driving engagement of the motor with the locking ring holder and the coupling device so that only the locking ring holder is driven in rotation when the motor moves in a first direction and wherein the coupling device is driven in rotation when the motor is moved in a direction which is opposite the first direction.