Sacrificial Edge-Tab Laser Welding for Modular Mandrel Assembly
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Solution Overview
Problem
Conventional methods for forming layup mandrels in aircraft construction are labor-intensive and challenging due to the need for large, complex, and distortion-prone tools, which are difficult to manufacture and transport.
Innovation Solution
A method involving laser welding of modular components with sacrificial edge-tabs, where the edge-tabs are melted by laser energy to form a melt-pool that solidifies into a weld, joining the components together, allowing for the fabrication of complex profiles and reducing the need for large, single-piece mandrels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the entire mandrel is fabricated and transported as one piece, then the mandrel maintains structural integrity, but the transportation and fabrication become time-consuming and labor-intensive
Solution Approach 1:
The mandrel is divided into multiple modular components that can be fabricated separately and assembled on-site using laser welding with sacrificial edge-tabs, eliminating the need to transport a single large component while maintaining structural integrity through precise welding
2Ease of manufacture
If conventional fabrication tools are used for large mandrels, then the mandrel can be manufactured, but the tools are very specialized and the process is labor-intensive
Solution Approach 1:
Conventional mechanical fabrication tools are replaced with a laser welding system that uses laser energy to melt and join modular components, simplifying the fabrication process and reducing the need for specialized heavy-duty mechanical equipment
3Ease of operation
If modular components are joined by conventional welding, then the components can be assembled, but gap preparation requires precise mechanical machining
Solution Approach 1:
Sacrificial edge-tabs are introduced as intermediary elements between modular components. These tabs are deliberately left protruding and are melted by the laser to form the weld, eliminating the need for precise mechanical gap preparation while ensuring proper weld formation
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
This approach simplifies the manufacturing process, reduces labor and transportation costs, and enables the creation of complex profiles without warping, by forming modular mandrels through precise laser welding of components with sacrificial edge-tabs.
Implementation Method 1
exposing the sacrificial edge-tab to laser energy, the laser energy being sufficient to melt at least a portion of the sacrificial edge-tab
Implementation Method 2
the laser energy being sufficient to melt at least a portion of the sacrificial edge-tab; forming a melt-pool in the gap between the first component and the second component, the melt-pool comprising material from the melted portion of the sacrificial edge-tab
Data Source
AI summary
Provided is a laser-weld manufacturing method. The method includes: providing a first component and a second component that are separated from one another by a gap, the gap having a depth and a width and at least one of the first component and the second component having a sacrificial edge-tab; exposing the sacrificial edge-tab to laser energy, the laser energy being sufficient to melt at least a portion of the sacrificial edge-tab; forming a melt-pool in the gap between the first component and the second component, the melt-pool including material from the melted portion of the sacrificial edge-tab; and solidifying the melt-pool to form a weld that joins the first component and the second component together.