Abstract

This thesis will discuss the development of a radial actuator incorporated into a deburring tool. Gas turbine engine deburring is complex; this requires the tooltip to maintain active compliance in three degrees of freedom. This can be achieved through the use of a rotating action plane so that only radial and axial actuation is required. A proposed enhanced radial actuator has been made that utilizes the action plane model and fulfill the requirements for precision deburring of gas turbine engine components. The enhanced radial actuator was designed using four silicone rubber pneumatic diaphragms. The diaphragms were modelled using a finite element method and applying an Arruda-Boyce material model to the mesh. The stiffness behaviour was analyzed and compared to data from previous research completed on radial actuation within an action plane. The stiffness behaviour was determined to be superior and significantly improved as it could be reliably predicted.

Highlights

  • 1.1 BackgroundManufacturing turbine engine parts can be a high cost and risk endeavor, due to the tight tolerances required of the complex machined and cast components

  • The Honeywell HMC1501 magnetic field sensors [20] are composed of four anisotropic magnetoresistant (AMR) sensing elements configured into a Wheatstone bridge circuit

  • As magnetic field lines pass through the AMR elements, the current flowing through them causes a variance in impedance across the elements which will result in an associated voltage

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Summary

Background

Manufacturing turbine engine parts can be a high cost and risk endeavor, due to the tight tolerances required of the complex machined and cast components. There is the added cost of very skilled workers to hand deburr each individual part These skilled workers use tools that are used in jewel and dental industry to remove burrs and polish the surfaces of the turbine engine parts. This process takes a long time which creates a bottle neck in production. The sum of these factors causes a very difficult and tedious job for those who are tasked with deburring turbine engine parts

Burr Formation
Problem Statement
Outline of the Thesis
Literature Survey
Burr Removal
Principles of Compliance
Existing Methods for Automated Deburring
Actuation
Summary
Chapter 3 Tool Design
Requirements and Design Parameters
Design Ideas
Trade Study
Developing the Enhanced Radial Actuator
Sensor Design
Chapter 4 Analysis
Tool Modelling
Tool and Workpiece Interaction
Tool and Actuator Interaction
Simulation
Chapter 5 Fabrication and Testing
Fabrication
Calibration
Testing
Conclusion and Future Work
Conclusion
Contributions
Findings
Future Work
Full Text
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