LIGO Document E0900261-x0

DCN - HAM Crossbeam Connector Weldment (D080462)

Document #:
LIGO-E0900261-x0
Document type:
E - Engineering documents
Abstract:
DCN for HAM Crossbeam Connector Weldment, describing changes made to prototype design in preparation for Advanced LIGO parts procurement.
Files in Document:
None
Authors:
Keywords:
DCN Crossbeam
Notes and Changes:
v2 releases for drawings for the Crossbeam Connector weldment. Changes made since v1 release include:

For all drawings:
1. Using new LIGO drawing formats.
2. Added note for part weight (in pounds).

For D080458:
1. Specified A500 Grade B Steel, instead of 'Low Carbon Steel'.
2. Minor changes to countersink dimensions.
3. Changed details of P/N engraving.
4. Moved 1/4"-20 hole locations, to not interfere with tube radii (see next note).
5. Added radii to long edges within the model, to better reflect true shape of structural tube as it comes from the mfgr.

For D080459:
1. Added chamfers.
2. Specified A36 Steel, instead of 'Low Carbon Steel'.
3. Minor changes to countersink dimensions.
4. Added finish spec (125 um).
5. Added P/N engraving.

For D080460:
1. Added chamfers.
2. Specified A36 Steel, instead of 'Low Carbon Steel'.
3. Minor changes to countersink dimensions.
4. Added finish spec (125 um).
5. Added P/N engraving.

For D080461:
1. Specified A36 Steel, instead of 'Low Carbon Steel'.
2. Added finish spec (125 um).
3. Added P/N engraving.
4. Modified notes, to point out that 2 of the Gussets (per weldment) need to be longer than the rest, to accommodate the large radii on the edges of the structural steel.

For D080462:
1. Added P/N engraving.
2. Added a new isometric view, along with more realistic color assignments, to better communicate the painted vs. non-painted areas.

Referenced by:

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