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Ring Loading Tooling

Ring Loading Tooling Drawings: 19-1 Ring.zip

  • In the future, use drawing release process to reduce risk of interface issues.

Stave Loading Tooling

Stave Loading Tooling in progress...

Summary of requirements for loading 19-1 Outer Barrel Stave:

  • Load RD53a Quad modules (drawings: 150um, 400um) with connectors oriented as shown in picture above
  • Load modules onto 19-1 OB Stave (no assembly drawing yet)
  • Load without collisions: 200um nominal gap / 100 micron minimum gap between modules (no assembly drawing yet)
  • ESD protection during loading: grounding of tooling
  • Mechanical protection of wire bonds during loading: stay clear of wire bonds, handle modules using tooling only, consider covers/shields
  • Baseplate to be installed onto glue robot: weight limit 7kg (per manual)
  • Stave to be removed from baseplate and transferred to test box for QC testing

Summary of different requirements for loading 19-1 Inner Barrel Stave:

  • Load Triplet modules (drawing, .step)
  • Load onto 19-1 IB Stave (no drawing yet, preliminary CAD on LBL Windchill site)
  • Load without collisions: 200um nominal gap / 100 micron minimum gap between modules (no assembly drawing yet)

Design approach intended to avoid collisions during loading:

  • Closely toleranced pins/bushings – same approach as used for 19-0 tooling
    • Requirement: +/-75um module position tolerance in local support coordinate system (per requirements document "ITk Pixel Module Loading Accuracy Requirements" AT2-IP-ES-006-v3)
    • Distribute tolerances:
      • +/-50um module position relative to loading tooling (to avoid collisions with 100um gap between modules)
      • +/-25um local support position relative to loading tooling (to accurately place modules to meet +/-75um requirement)

Notes for design of 19-1 Stave tooling:

  • Re-use tooling from 19-1 Quad loading bridge; make new 19-1 linear Triplet loading bridge and tooling
  • Using beads to set glue thickness; no longer need dial indicators or differential adjusters
  • Use 2 sets of micrometer adjusters (absolute scale)
  • Add soft material to vacuum pads for better sealing and smoothness.
  • Consider adding a hole patterns for trussing / support below the 19-1 Stave baseplate.
  • Reconfirm that Stave and Module CADs / drawings are compatible with tooling, before manufacture.
  • Use dowel pins and screw interface to ends of Stave (locate same as in production assembly)
  • Consider longer dowel pins in the baseplate (help locate the bridge, without pivoting)


Some past presentations:



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