Vibration-Assisted Rolling for Thin-Walled Surface Treatment
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Solution Overview
Problem
Existing surface treatment methods for thin-walled aerospace components fail to effectively impart compressive stresses without deforming the geometry, necessitating high static pressure loads.
Innovation Solution
A vibration-assisted rolling method using a roller to apply static pressure and transmit vibrations concurrently, which imparts compressive stresses within the material below the surface, reducing the need for excessive static pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high static pressure loads are applied to impart compressive stresses in thin-walled components, then compressive stress effectiveness is improved, but geometric deformation increases
Solution Approach 1:
The patent applies vibration to the rolling tool during the surface treatment process. The vibration creates dynamic effects that enhance material response to the rolling pressure, allowing compressive stresses to be imparted more effectively at reduced static pressure levels, thereby preventing geometric deformation in thin-walled components
Solution Approach 2:
The patent changes the physical state and parameters of the treatment process by introducing vibrational parameters (frequency, amplitude) to the rolling operation. This parameter change modifies the material's response characteristics, enabling effective compressive stress imparting at lower static pressure levels that preserve geometric integrity
2Strength
If conventional rolling methods are used on thin-walled components, then compressive stresses are imparted, but the wall thickness limitation restricts applicability
Solution Approach 1:
The vibration applied to the rolling tool enables effective treatment of thinner walls by enhancing the material's plastic response during rolling. The vibrational energy facilitates compressive stress imparting in walls as thin as 0.10 inches, expanding the applicability range beyond conventional rolling limitations
3Strength
If excessive static pressure is applied to treat thin-walled components, then compressive stress effectiveness is improved, but damage to the component increases
Solution Approach 1:
The vibration during rolling creates dynamic material response that enhances compressive stress imparting efficiency. This allows the process to achieve effective compressive stresses at lower static pressure levels, reducing the harmful effects of excessive pressure on thin-walled component integrity
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
Enhances damage tolerance and fatigue life of thin-walled components by up to ten times while maintaining geometry integrity, allowing treatment of components with walls as thin as 0.10 inches.
Implementation Method 1
transmitting vibrations into the material of the component through the roller
Implementation Method 2
The vibrations may be ultrasonic vibrations
Implementation Method 3
applying a static pressure load against the surface of the component with a roller
Data Source
AI summary
A method of operation is provided during which a tool is arranged with a surface of a component. The tool includes a roller contacting the surface. A rolling operation is performed on the surface using the roller. A vibration operation is performed on the surface through the roller concurrently with the performing of the rolling operation.