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Description of welding prototypes Results The new design - Conclusion

Description of welding prototypes Results The new design - Conclusion. Conical shape (welding length 14,79 mm). EB welding. Few welding points. 2 prototypes for the tests of EB welding. Goal : to see the deformations made by EB welding. (14,79 pm). 11. Ra 0,8. Steps :

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Description of welding prototypes Results The new design - Conclusion

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  1. Description of welding prototypes • Results • The new design • - Conclusion Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  2. Conical shape (welding length 14,79 mm) Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  3. EB welding Few welding points 2 prototypes for the tests of EB welding Goal : to see the deformations made by EB welding (14,79 pm) 11 Ra 0,8 • Steps : • manufacturing the parts A and B with coaxiality tolerances of 50 microns • to machine a centering device and to insert it inside A and B • make few welding points by EB welding • remove the centering device to avoid to keep it prisoner • make the EB welding 45°±10’ A B Ø 78 Ø 78 Ø 112 Ø 99 Ø 116 16 58 89 Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  4. 2 prototypes (14,79 pm) (14,79 pm) 11 11 Ra 0,8 Ra 0,8 45°±10’ 45°±10’ Ø 78 Ø 78 Ø 78 Ø 78 Ø 99 Ø 112 Ø 116 Ø 99 Ø 112 Ø 116 22 16 58 58 89 89 Short version Long version Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  5. 2 prototypes Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  6. RESULTS Parallelism : short version : 0,012 long version : 0,012 (14,79 pm) 11 Ra 0,8 45°±10’ Coaxiality : Short version : 0,114 Long version : 0,151 A B Ø 78 Ø 78 Ø 99 Ø 112 Ø 116 Misalignment : ≃ 50μ between A and B The welding stops up to 0,1mm from the inner side (welding depth of 14,69) 22 58 Leak tests : Short version : 1. 10-10mbar.l.s-1 Long version : 1. 10-10mbar.l.s-1 89 Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  7. RESULTS • To support the parts A and B during the EB welding • A large conical shape is not necessary (with a large conical shape, the welding power is higher therefore the deformation is also higher too) • The centering device must stay during the welding but must be demonstrable after the welding Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  8. Conical shape (length 4,85 mm) Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  9. Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  10. The proposal of the manufacturing process for the reentrant BPM Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

  11. Conclusion • - a conical shape between the part A and the part B allows to centre , • on the other hand, a large support conical shape is not necessary and is perhaps unlucky (the large powerful introduces some deformations) • for reduce the deformations, the speed of welding must be increased, the depth of welding must be reduced Nelly Rouvière Cold BPM-XFEL Workshop 12-05-2007

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