2. SQXF Shell & Yoke Assembly Procedure
J.C. Perez
Nicolas Bourcey, Paolo Ferracin, Javier Parrilla Leal, Mariusz Juchno

3. Shells ready to be assembled
4 feet assembly base
The shells are instrumented with the strain gauges before starting the assembly sequence
J.C. Perez
July 2014

4. Lower shell positioning
Longitudinal positioning
support for a ¼ yoke
Longitudinal positioning
support for the shell
The base plate will be levelled and bolted to the floor
J.C. Perez
July 2014

5. Shells preparation
4 short alignment pins are inserted and glued in the lower inner shell slots of the first shell to be installed on top of the assembly base plate
J.C. Perez
July 2014

6. Shell lifting
The shells are manipulated using a 4 sling lifting tool and adjustable bolted lifting eyes.
J.C. Perez
July 2014

7. Mounting lower shell
The lower shell is positioned on top of the assembly base plate
J.C. Perez
July 2014

8. Longitudinal offset yoke/shell
1 mm gap for offset between ¼ yoke and shell
J.C. Perez
July 2014

9. Mounting upper shell
The upper shell is positioned on top of the lower shell
J.C. Perez
July 2014

10. Angular positioning of the shells
The relative angular alignment between the 2 shells is guaranteed by the use of the 2 long pins
J.C. Perez
July 2014

11. Mounting angular positioning pins
The 2 long pins are inserted in the correspondent grooves and kept in position by using a dedicated holding tool
J.C. Perez
July 2014

12. Securing shells assembly
4 aluminum profiles mounted around the shells and clamped with adjustable straps, prevent the upper shell to fall
J.C. Perez
July 2014

13. ¼ yoke rotation
The ¼ yokes are equipped with a dedicated lifting tool and installed on a pivoting table. The yokes will be inserted on the shells in vertical position
J.C. Perez
July 2014

14. First ¼ yoke insertion (1/2)
J.C. Perez
July 2014

15. First ¼ yoke insertion (2/2)
The angular alignment of the first ¼ yoke is defined by 1 long middle pin and 2 small pins located at the shell extremities
J.C. Perez
July 2014

16. Joke clamping Upper radial clamp Lower radial clamp
Dedicated clamping tools will be used to radially clamp the ¼ yoke in the shells
J.C. Perez
July 2014

17. Removing central pin holding tool
The holding tooling of the middle pin is removed before clamping the yoke at its final radial position (required gap between yoke and shell to allow pin removal ± 0.3 mm)
J.C. Perez
July 2014

18. Lifting tool removal
J.C. Perez
July 2014

19. Second ¼ yoke insertion
The second ¼ yoke is inserted and clamped like the first one
J.C. Perez
July 2014

20. 3rd ¼ yoke insertion(1/4)
Using the same assembly procedure, the 3rd yoke will interfere with the yokes already installed.
J.C. Perez
July 2014

21. 3rd ¼ yoke insertion(2/4)
J.C. Perez
July 2014

22. 3rd ¼ yoke insertion(3/4)
The Yoke lifting tool is equipped with 2 guiding wheels forcing the yoke against the plastic spacers
2 longitudinal plastic spacers will be used to guarantee a constant gap between yoke and shell preventing interference with the already inserted yokes
J.C. Perez
July 2014

23. 3rd ¼ yoke insertion(4/4)
The yoke is temporally clamped and the 4 (40mm) short alignment pins are inserted on the grooves before removing the plastic spacers
The yoke is clamped onto its final position and the lifting tool is removed
J.C. Perez
July 2014

24. The last remaining yoke is inserted and clamped using the same method
4th ¼ yoke insertion(4/4
The last remaining yoke is inserted and clamped using the same method
J.C. Perez
July 2014

25. Mounting center welding blocs
2 stainless steel blocs for welding key alignment and tack welding will be bolted to the yokes
J.C. Perez
July 2014

26. Bladders support structure for shell loading
J.C. Perez
July 2014

27. Yoke pre-loading
A cross-shape support will be inserted in the structure to support the bladders for shell pre-loading operation
J.C. Perez
July 2014

28. 4 bladders of 1549 * 57 mm will be used for pre-loading operation
Bladders insertion
4 bladders of 1549 * 57 mm will be used for pre-loading operation
J.C. Perez
July 2014

29. Yoke keys insertion
J.C. Perez
July 2014

30. Pre-loading tool removal
J.C. Perez
July 2014

31. Yoke loading sequence
J.C. Perez
July 2014

32. Lifting Yoke and Shell
J.C. Perez
July 2014

33. Yoke and Shell rotation
J.C. Perez
July 2014

34. And now real pieces !!!
J.C. Perez
July 2014

35. And now real pieces !!!
J.C. Perez
July 2014