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BOND design status - Structure update
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Europe/Zurich
927/1-B23 (CERN)
BOND design status
MINUTES:
Update on on-going activities:
- Bearings reaction tooling assy.
- We should provide some numbers on the thermal expansion mismatch between the horizontal bearings position and the central fixed plate. Proposal is to use a plate/shims with same materials as the bearing axis. But may be not needed. Action item: Check numbers and take action.
- Side plates to block the assembly during manipulation
- Federico is doing the computations for lifting the assembly (results to be stored)
- 1 week to complete production drawings (ready for mid next week), including feedback from simulations
- Lifting tooling
- The current solution considers 4 bolts that take all shear when lifting. Consider adding pins instead and just bolts for joining.
- Tooling positioning for splicing. (In FRESCA this operation was tricky, Tin was migrating due to inclination)
- Solution 1 - Tilted frame (bolted)
- Solution 2 - Tilted frame with feets (quick axle release)
- Solution 3 - Welded frame
- Proposal - Design two feets (tooling) to fit directly on the available assembly tables at B.927
- Magnet lifting
- 2 solutions
- Proposal - Alternative solution with spacers and eyebolts (or dedicated ears) on both yoke extremities that are pinned and bolted.
- Splicing tooling
- Well advanced
- See last week's minutes
- 150 mm for the splice length (pitch is 124 mm for the last cable version) - 30 mm more than pitch, consistent with MQXF
- Drawings
- Added the stress relieving data for parts
Mechanical structure:
- For BOND, do not consider the active and passive bladder solution. Try instead to make the encapsulation the thinnest.
Racetrack coil mock-up:
- RHT cycle finished. The mock-up will be recovered from the oven tomorrow. Oscar will post-process the data as soon as possible.
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