1. 435B Transport Container Fabrication Challenges and Solutions
Presented by Kyle Harrison

2. 435B – Transport Container
Impact Limiter
Transport Container and Inner Container
Lodgement

3. Fabrication Challenge #1 Fabricating Rolled Rings with Flanges
Upper Ring
Lower Ring

4. Fabrication Challenge #1 Upper Ring
Upper Ring Fixture
Upper Ring after Forming
Upper Ring

5. Fabrication Challenge #1 Upper Ring
Upper Ring Welding and Forming Fixture

6. Fabrication Challenge #1 Lower Ring
Rolled Ring with Welded on
Flat Head
Rough Machining with Weld Prep
Geometry in the Slot

7. Fabrication Challenge #1 Lower Ring
Finished Ring Geometry
Lower Ring
Ring in Fabrication

8. Fabrication Challenge #1 Possible Solutions
Be aware of the limitations of flanging rings
Have a conversation with potential supplies
Thicker materials
Longer Flanges

9. Fabrication Challenge #2 Lodgment –Distortion Prototype
Piece Part Tolerances: +/ ” to +/ ”
Final Weldment Tolerance: +/ ”
Welding Distortion
Approximately 0.045”
Minimized through process testing (GTAW, GMAW, Parameters)

10. Fabrication Challenge #2 Diametrical – Expanding Plates (Inner Container)
OD of the Flange Tolerances: +/ ” before and after welding
Container 1: OOT by 0.090”
Container 2: OOT by 0.070”

11. Fabrication Challenge #2 Diametrical – Expanding Plates (Head to Shell)
Head Supplied at Low End of Tolerance Zone
Used a 1.25” Machined Plate
Produced No OOT Condition

12. Fabrication Challenge #2 Diametrical – Expanding Plates (Head to Shell)
Head and Plate

13. Fabrication Challenge #2 Possible Solutions
Control the Final Weldment more than the Piece Parts
Allow for Plate Thickness Increase (Machine allowance and Stack up)
Allow for Machined only Components
Side Note: Geometric Tolerancing to Distorted Datums

14. Fabrication Challenge #3 Order of Fabrication
Upper Bell
Flange Cross Section

15. Fabrication Challenge #3 Order of Fabrication
Rough Machining and Welding
Final Machining
Final Shell Weld

16. Fabrication Challenge #3 Possible Solutions
Partner with a Fabricator that will give Guidance for Weld Distortion, Manufacturability and Machinability.
Allow Creative Solutions that Meet the Design Intent

17. Questions