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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 Authors: Dave Cantoni Boeing Commercial Airplane Group Scott Sandwith New River Kinematics 2002 Coordinate Measurement System Committee Providence, RI
Introduction • Relationshipscapture the distances between objects • Collections of objects (describe common relationships) Part Features • Directly optimize part featuresBest Performance • Transform instruments and parts with Relationships (ERS* – is not needed!) • Relationships vs. Optical Tooling Points • Applications and Examples • Summary * Enhanced Reference System
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
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
Application • Door Surface, Hinge Line, and Trim vs. ERS
Relationship Optimization Results Dependent on ERS Feature Relationship Optimization
Application • Fuselage Assembly Frame to Frame
Application • Assemble Spar Features
Application: Spar Inspection • Spar Hinge Line, Web Surface, Upper and Lower Cords
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.
Acknowledgements • Mike O’Brien of Boeing • Dr. Robert Salerno, Joseph Calkins, and Bruce Thomas of NRK • Rick Cole and Mark Wilmoth of Brunson
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships