![Page 1: LHCb Pedestal Assembly Peter Cooke. Peter Cooke 28 Feb - 1 March 2006 - VELO PRR2 LHCb Pedestal Assembly Feet to Base Assembly Paddle Preparation Assembly](https://reader036.vdocuments.site/reader036/viewer/2022062511/55160223550346d46f8b5bb9/html5/thumbnails/1.jpg)
LHCb Pedestal Assembly
Peter Cooke
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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LHCb Pedestal Assembly
Feet to Base Assembly Paddle Preparation Assembly Machining Inspection Summary
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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LHCb Pedestal Assembly
![Page 4: LHCb Pedestal Assembly Peter Cooke. Peter Cooke 28 Feb - 1 March 2006 - VELO PRR2 LHCb Pedestal Assembly Feet to Base Assembly Paddle Preparation Assembly](https://reader036.vdocuments.site/reader036/viewer/2022062511/55160223550346d46f8b5bb9/html5/thumbnails/4.jpg)
Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Feet to Base Assembly
Accurately machined fixture
Locate Invar feet to dowel and slot
Bond in the carbon fibre base (Araldite 2011)
When set, machine paddle inner profile to form location spigot 5mm deep
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Feet to Base Assembly
Left clamp foot – located with precision dowel
Right clamp foot – spigot 14 + 0.000 / – 0.008 mm located in precision machined slot 14 + 0.002 / -0.010 mm
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Paddle Preparation
Dress open end of paddle to fit drilling jig – spigot and length
Drill holes Bond in M2.5mm inserts
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Precision Assembly Fixture
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Assembly
Apply thin layer of Araldite 2011 to the machined spigot on base
Fasten onto fixture Apply layer of adhesive to inside of
paddle Offer paddle to base Hold in position with M2.5mm screws
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Machining
Hold in fixture Grind substrate mounting face to
set distance from centreline
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Inspection Visual inspection for defects Inspect substrate mounting face on
CMM for flatness and position to centreline
Re-inspect following grinding of mounting face
Enter information in database
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Peter Cooke 28 Feb - 1 March 2006 - VELO PRR
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Summary
Demonstrated techniques and accuracy by building five mechnicals
Z dimension consistency Can produce one assembly per day (due
to curing time)