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Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships

Explore how Weighted Feature to Measurement Relationships optimize part features for enhanced performance in design and assembly processes. Learn applications, benefits, and examples. Improve product reliability and reduce costs with relationship fitting.

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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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