High-Aspect-Ratio Steel Wing Machining for Deformation Control
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Solution Overview
Problem
High-aspect-ratio wing structures in aircrafts face challenges with weak bending moment resistance and poor rigidity during wind tunnel tests, necessitating a machining method for ultra-high strength steel that improves molded surface accuracy and reduces deformation.
Innovation Solution
A machining method involving solid solution heat treatment, enlargement of the material blank, and strategic placement of process reference blocks, followed by finish milling and aging treatment to achieve precise alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ultra-high strength steel is used for high-aspect-ratio wing structures, then bending moment resistance and rigidity are improved, but machining precision and surface accuracy deteriorate due to material deformation
Solution Approach 1:
The patent applies solid solution heat treatment before machining operations to homogenize the ultra-high strength steel material structure and reduce internal stresses. This preliminary thermal processing prevents deformation during subsequent machining, ensuring that the molded surface accuracy is maintained despite using high-strength materials with poor machinability.
Solution Approach 2:
The patent employs aging treatment after machining operations to alter the material properties of the ultra-high strength steel. This post-machining heat treatment adjusts the microstructure and dimensional stability of the material, compensating for any deformation that occurred during machining and restoring the molded surface accuracy.
2Length of moving object
If high-aspect-ratio wing structure is designed, then aircraft range and flight altitude are improved, but bending moment resistance and rigidity deteriorate
Solution Approach 1:
The patent utilizes ultra-high strength steel with tensile strength ≥1700 MPa, which combines high strength properties with the required structural characteristics. This composite material approach allows the wing structure to maintain both the high aspect ratio for extended range and altitude, while the ultra-high strength steel provides the necessary bending moment resistance and rigidity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the overall molded surface accuracy and surface roughness of high-aspect-ratio wing parts, ensuring high precision and stability during machining, thereby meeting wind tunnel test requirements.
Implementation Method 1
performing forging and solid solution heat treatment on the envelope material blank
Implementation Method 2
performing aging treatment on the wing main body
Data Source
AI summary
The present disclosure relates to the technical field of aerospace, and provides a machining method for high-aspect-ratio model part of ultra-high strength steel for wind tunnel test. The machining method includes the following steps: a) selecting a material; b) performing preliminary treatment, such as forging and solid solution heat treatment, on the material; c) performing rough milling to obtain a wing main body profile, process reference blocks, and grooves and holes with large sizes on a molded surface; d) performing finish milling on all machining features of a wing main body; e) removing all process reference blocks except the first process reference block; f) performing aging treatment when the wing main body is lifted; h) removing a process reference block at a wing main body root; and h) performing shaping treatment on the wing main body.