UGBS Main Plate

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UGBS Main Plate
Patrick Schmid (left) of ETHZ did the CNC
machining of the plate. Urs Horisberger (ETHZ)
Completed follow up machining
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UGBS Plate Machining

• Back (top) Front (right) sides of plate

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UGBS Subassemblies
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UGBS Plumbing Model

• Model was made to
• perform a Fit check of the subassemblies
• Weld the whole system
• Test the valves system

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MV197 Bracket
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MV197 Bracket Tube welding

• The full assembly looks like this

• Easier to look at half! The welding procedure
  will look at only half since the other side is
  mirror symmetrical

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2 Step Construction
Step 1
Step 2

• First the U (welding steps 1,2,3) are welded
  not mounted in the bracket.
• Then the xv254 and the filter are mounted and
  welded (steps 4-6)
• The GP50 is installed and all remaining welds
  performed.
• The welded components are now removed to allow
  for the welding of the MV197 valves

• The MV197s are installed and secured as shown
• The U (steps 1,2) is pre-welded and then welded
  to the valves (steps 3,4)
• the 1/4-1/8 reducers are pre-welded to the
  T-junctions and then welded to the valves (steps
  7,8)
• The U is then welded (steps 9,10)
• The U to the xv234is then welded per step 11.

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Step 3

• The Step 1 components are then mounted and welded
  (It may be more practical that all 4 mv197 are
  mounted before installing the pre-welded pressure
  and filter units)
• Perform same steps for mirror side
• Note also, all 1/8 tubes going to the buffer
  volumes or otherwise (NOT SHOWN -but at the ends
  of all 1/4-18 reduction pieces) need to be
  pre-welded -the welding head will not fit later.

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4 Valve Bracket Welding Sequence

• Follow sequence as shown
• Welds 1 5 need attention since they may need to
  be done first

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4 Valve Bracket
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2 Valve Bracket
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2Valve Bracket Welding Sequence
Step 2 (valves)
Step 1 (Oriface/Filter Unit)

• Welding follows the sequence above.
• Step (12) is welded after inserting the filter
  into the bracket.
• Weld 4 in the 2nd step should be performed after
  the oriface/filter unit is loosely fitted into
  the bracket
• After welding is copleted RTV is injected in the
  Filter cavity

2 valve bracket Completed
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Venting Valve Bracket
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TRD Gas System Mechanics StatusR.Becker (MIT)
October 30, 2002

• UGBS design done, commercial version being
  assembled
• Flight main plate ordered, most flight brackets
  manufactured
• UGBS kit including welding procedures being
  prepared for ARDE
• UGBC design needs to be finalized
• UGBC to TRD manifold plumbing bracketry designs
  needed

Radiator not shown
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UGBC (Circulation System)

• Status
• Sealed cylindrical container design feasible
• CERN welding experts state that such a cylinder
  can be welded cleanly.
• Rough mechanical design done (Right)
• components arranged within boundaries (wasnt
  easy)
• 4-valve bracket adapted from UGBS
• Detailed design foreseen by early December