Metrology Enhanced Tooling for Aerospace (META): Strategies for Improved Accuracy of Jig Built Structures

Authors

J E Muelaner, O C Martin, P G Maropoulos

Department of Mechanical Engineering, The University of Bath, Bath, UK

Presented at

SAE Aerotech 2011

18-21st October 2011, Toulouse, France

Official URL

http://www.sae.org/events/atc/

Abstract

The accuracy of many aerospace structures is limited by the accuracy of assembly tooling which is in turn limited by the accuracy of the measurements used to set the tooling. Further loss of accuracy results from different rates of thermal expansion for the components and tooling. This paper describes improved tooling designs and setting processes which have the potential to significantly improve the accuracy of aerospace structures. The most advanced solution described is environmentally isolated interferometer networks embedded within tooling combined with active compensation of component pick-ups. This would eliminate environmental effects on measurements while also allowing compensation for thermal expansion. A more immediately realizable solution is the adjustment of component pick-ups using micrometer jacking screws allowing multilateration to be employed during the final stages of the setting process to generate the required offsets.

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Split Bearing Located on Kinematic Mount and Three-Way Linear Slide
Split Bearing Located on Kinematic Mount and Three-Way Linear Slide

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