may 5, 2004h.j. krebs1 2004 lst installation readiness review brass absorber production h.j. krebs...
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May 5, 2004 H.J. Krebs 1
2004 LST Installation Readiness Review
Brass Absorber Production
H.J. KrebsMay 5, 2004
May 5, 2004 H.J. Krebs 4
Brass Absorber Production• Total of 180 brass plates to be produced – includes
spares– Qty 30 10.5”x112.833”x.875” thick– Qty 30 10.5”x106.287”x.875” thick– Qty 30 10.5”x100.650”x.875” thick– Qty 30 10.5”x95.195”x.875” thick– Qty 30 10.5”x90.194”x.875” thick– Qty 30 10.5”x85.193”x.875” thick
• The first 60 brass plates are enroute to SLAC• The remaining plates to be delivered by mid May• Plates require final machining and cambering
– Tapped holes for rigging– Edges rounded– Cambered to remove deflection
• Stainless steel slide angles are in-house
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Potential Risks• We expect no problems receiving the absorber plates in
plenty of time to perform the final machining and cambering process.
• The final machining process may take longer than expected.– We believe the possibility of this is low.
• It took us 30 minutes to drill and tap the prototype plate and round the edges – 30 min * 180 plates = 90 hours
• We can put more manpower on this if needed.
• The cambering process may take longer than expected and may be more difficult than expected– We believe the possibility of this is low.
• It took us 45 minutes to setup our camber fixture to the appropriate shim configuration and camber one plate
• Subsequent plates could easily be cambered at the rate of 15 minutes per plate – 15min * 180 plates = 45 hours
– A local vendor can camber the plates for us if needed.