Aeronautical Part Deburring with Calibrated Articulated Tooling

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Solution Overview

Problem

Current deburring methods for aeronautical parts, such as turbomachine disks, are inefficient and prone to errors due to manual adjustments and asymmetrical radii generation, leading to incomplete burr removal and potential incidents.

Innovation Solution

An articulated tooling system with a tool holder holding both a calibration tool and a machining tool, allowing for precise calibration and parameterization to determine the relative position of the tools, enabling accurate deburring along a predetermined trajectory, thereby improving the accuracy and consistency of the deburring process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If brushing techniques are used for deburring operations, then productivity is improved through automation, but manufacturing precision deteriorates due to asymmetrical radii generation

Engineering Contradiction:

Improveautomation of deburring operationsVSAvoidsymmetry of radii along slot edge

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

Instead of rotating the brush perpendicular to the edge (conventional approach), the invention rotates the brush parallel to the edge direction. This inversion of the brushing orientation allows the brush to maintain consistent contact pressure and angle along the entire slot edge, generating symmetrical radii while preserving automated productivity

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The invention introduces dynamic adjustment capabilities to control the brush's position and orientation during rotation. By dynamically adjusting the brush's angular position and rotational speed, the system maintains optimal contact conditions throughout the deburring process, ensuring symmetrical radius formation while keeping the operation automated

Inventive Principle:

Principle #15Dynamics

2Manufacturing precision

If manual adjusting operations are used for critical edges, then manufacturing precision is maintained through careful adjustment, but productivity deteriorates due to time-consuming manual operations

Engineering Contradiction:

Improveaccuracy of burr removal on critical edgesVSAvoidspeed of deburring operations

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The invention replaces manual mechanical adjusting operations with an automated robotic system equipped with sensors and control algorithms. The robot can automatically detect edge positions, calculate optimal brushing parameters, and execute precise deburring movements, thereby maintaining high precision while dramatically improving productivity through automation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system incorporates self-adjustment capabilities where the robotic controller automatically calibrates brush position and orientation based on real-time feedback from sensors. This self-service mechanism eliminates the need for manual intervention while maintaining the precision previously achieved only through skilled manual adjustment

Inventive Principle:

Principle #25Self-service

3Manufacturing precision

If brushing is performed perpendicular to the edge at slot bottom, then manufacturing precision is improved by achieving maximum radius values, but device complexity increases due to prohibited brush-part interaction

Engineering Contradiction:

Improveradius value at slot bottom edgeVSAvoidbrush arrangement constraints

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The invention deliberately uses asymmetrical brush orientation (parallel to edge) rather than the symmetrical perpendicular arrangement. This asymmetrical configuration, while seemingly less intuitive, actually simplifies the device by eliminating the need for complex positioning mechanisms to avoid brush-ferrule interaction, while still achieving the desired radius values through the inverted brushing approach

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS11752562B2Method for improved deburring of an aeronautical part

Publication Date: 2023.09.12 SAFRAN AIRCRAFT ENGINES SAS

AI summary

A method for deburring an aeronautical part with an articulated tooling including a plurality of axes of rotation, the aeronautical part including at least one edge to be deburred, the articulated tooling including a tool holder, holding a calibration tool and a machining tool, the calibration tool and the machining tool being fixed to the tool holder and being immovable relative to one another, the method including steps of calibrating the calibration tool and the machining tool, of parameterizing the aeronautical part, of deburring the at least one edge to be deburred with the machining tool moving along a predetermined trajectory, on the basis of the parameters obtained during the parameterization step.