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Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships

Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships. Authors: Dave Cantoni Boeing Commercial Airplane Group Scott Sandwith New River Kinematics. 2002 Coordinate Measurement System Committee Providence, RI. Introduction.

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Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships

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  1. Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships Authors: Dave Cantoni Boeing Commercial Airplane Group Scott Sandwith New River Kinematics 2002 Coordinate Measurement System Committee Providence, RI

  2. Introduction • Relationshipscapture the distances between objects • Collections of objects (describe common relationships)  Part Features • Directly optimize part featuresBest Performance • Transform instruments and parts with Relationships (ERS* – is not needed!) • Relationships vs. Optical Tooling Points • Applications and Examples • Summary * Enhanced Reference System

  3. Classic Optimization Points to Points Points to Surface Relationships Point to Point Point to Objects Groups to Objects Frame to Frame Object to Object … Etc. ERS Relationships Background: Relationships

  4. Benefits of Relationship Fitting • Optimize product performance • Relationship between features are optimized directly!  Build / Inspect • Cost savings and flow time reduction • OTP maintenance and time • Set/Inspect part features directly from CAD • Reduces measurement tolerance guess work • Improves assembly reliability • Custom configurations directly on the shop floor • Integrate assembly configuration for design/tolerance improvements

  5. Application • Door Surface, Hinge Line, and Trim vs. ERS

  6. Relationship Optimization Results Dependent on ERS Feature Relationship Optimization

  7. Application • Fuselage Assembly Frame to Frame

  8. Application • Assemble Spar Features

  9. Application: Spar Inspection • Spar Hinge Line, Web Surface, Upper and Lower Cords

  10. Summary • Relationship Optimization will improve results over traditional processes. • Relationships reduce the amount of tolerance information vs. the OTP process. • Preparation, Setup, and Flow time are minimized • Using the CAD Geometry in Relationships improves part and trend analysis. • Using part tolerances instead of tooling tolerances enables significant cost savings.

  11. Acknowledgements • Mike O’Brien of Boeing • Dr. Robert Salerno, Joseph Calkins, and Bruce Thomas of NRK • Rick Cole and Mark Wilmoth of Brunson

  12. Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships

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