Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Authors: Dave Cantoni
Boeing Commercial Airplane Group
Scott SandwithNew River Kinematics
2002 Coordinate Measurement System CommitteeProvidence, RI
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Introduction• Relationships capture 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
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Background: Relationships• 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
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
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
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Application• Door Surface, Hinge Line, and Trim vs.
ERS
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Relationship Optimization ResultsDependent on ERS
Feature Relationship Optimization
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Application• Fuselage Assembly Frame to Frame
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Application• Assemble Spar Features
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Application: Spar Inspection• Spar Hinge Line, Web Surface,
Upper and Lower Cords
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
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.
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Acknowledgements• Mike O’Brien of Boeing • Dr. Robert Salerno, Joseph Calkins,
and Bruce Thomas of NRK• Rick Cole and Mark Wilmoth of
Brunson
Coordinate Measurement System
CommitteeProvidence, RI
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement RelationshipsSimultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
Cantoni and Sandwith
Simultaneous Design Constraint Optimization using Weighted Feature to Measurement Relationships
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