Turbine Blade Leading Edge Machining Automation
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Solution Overview
Problem
The existing methods for machining the leading edge of turbine engine blades are manual and inefficient, leading to suboptimal aerodynamic performance due to wear and damage, and require manual profiling which lacks precision and consistency.
Innovation Solution
A method using a machining centre that acquires a 3D profile of the blade, calculates key characteristics, compares them to theoretical values, and sets parameters for machining passes to optimize the leading edge's aerodynamic profile, ensuring precise geometry and thickness, and optionally includes metal cladding and porosity analysis for correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual machining by operator is used, then flexibility in handling damaged blades is maintained, but machining precision and consistency deteriorate
Solution Approach 1:
The patent replaces manual mechanical machining operations with an automated machining centre that uses computer-controlled abrasive strips. The system automatically profiles the leading edge by removing material while maintaining precise chord width control, eliminating the inconsistency of manual operations while preserving operational flexibility through programmable parameters.
Solution Approach 2:
The patent changes the operational parameters from manual control to automated control with precisely defined limits. The machining centre operates with programmed chord width limits and automated feed rates, transforming the flexible but imprecise manual process into a precise and repeatable automated process that maintains adaptability through parameter adjustment.
2Manufacturing precision
If automated machining centre is used, then machining precision is improved, but operator skill dependency is eliminated
Solution Approach 1:
The patent implements a fully automated machining centre that replaces operator skill with computer-controlled operations. The system uses programmable logic to control abrasive strip movement, depth of cut, and profiling parameters, achieving consistent precision without requiring experienced operators while maintaining high automation level.
3Adaptability or versatility
If hand machining is used, then adaptability to different blade conditions is maintained, but productivity deteriorates
Solution Approach 1:
The patent maintains adaptability by allowing programming of different chord width limits and profiling parameters for various blade types and damage conditions. The machining centre can be reconfigured through parameter changes rather than physical retooling, enabling quick adaptation to different blade specifications while maintaining high productivity through automated continuous operation.
Solution Approach 2:
The patent implements preliminary measurement and programming of machining parameters before the actual machining operation. The blade geometry is scanned and the optimal profiling path is calculated in advance, allowing the automated system to adapt to specific blade conditions without slowing down the production process.
4Ease of operation
If manual profiling is used, then operational simplicity is maintained, but aerodynamic performance optimization deteriorates
Solution Approach 1:
The patent replaces simple manual profiling with automated computer-controlled machining that precisely follows calculated optimal profiles. The system automatically compensates for blade wear patterns and maintains the designed aerodynamic geometry, achieving superior profile precision while keeping the operation simple through automated execution of pre-programmed sequences.
Data Source
AI summary
A method and a device for machining the leading edge of a turbine engine blade by a machining center for which parameters are set is disclosed. The method includes: acquiring a 3D profile of the leading edge of the blade; calculating at least one characteristic of the leading edge from the 3D profile; comparing the value of the calculated characteristic with a known theoretical value of the characteristic to obtain an elementary difference for the characteristic; calculating at least one undulation of the leading edge between at least two consecutive elementary sections from the 3D profile; optimizing the elementary differences obtained as a function of the undulation; setting the parameters of the machining center as a function of the optimized elementary differences for the elementary sections to define machining passes over the leading edge; and machining the leading edge of the blade with the machining center with parameters set.